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Sun J, Yang W, Li M, Zhang S, Sun Y, Wang F. Metagenomic analysis reveals soil microbiome responses to microplastics and ZnO nanoparticles in an agricultural soil. JOURNAL OF HAZARDOUS MATERIALS 2025; 492:138164. [PMID: 40188549 DOI: 10.1016/j.jhazmat.2025.138164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2025] [Revised: 03/24/2025] [Accepted: 04/02/2025] [Indexed: 04/08/2025]
Abstract
Both microplastics (MPs) and engineered nanoparticles are pervasive emerging contaminants that can produce combined toxicity to terrestrial ecosystems, yet their effects on soil microbiomes remain inadequately understood. Here, metagenomic analysis was employed to investigate the impacts of three common MPs [i.e., polyethylene (PE), polystyrene (PS), and polylactic acid (PLA)] and zinc oxide nanoparticles (nZnO) on soil microbiomes. Both MPs and nZnO significantly altered the taxonomic, genetic, and functional diversity of soil microbes, with distinct effects depending on dosage or type. Archaea, fungi, and viruses exhibited more pronounced responses compared to bacteria. Higher doses of MPs and nZnO reduced gene abundance for nutrient cycles like C degradation and N cycling, but enhanced CO2 fixation and S metabolism. nZnO consistently decreased the complexity, connectivity, and modularity of microbial networks; however, these negative effects could be mitigated by co-existing MPs, particularly at elevated doses. Notably, PLA (10 %, w/w) exhibited greater harm to fungal communities and increased negative interactions between microbes and nutrient-cycling genes, posing unique risks compared to PE and PS. These findings demonstrate that MPs and nZnO interact synergistically, complicating ecological predictions and emphasizing the need to consider pollutant interactions in ecological risk assessments, particularly for biodegradable MPs.
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Affiliation(s)
- Jiao Sun
- College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, 266042, PR China; Shandong Vocational College of Science and Technology, Weifang, Shandong 261000, PR China
| | - Weiwei Yang
- College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, 266042, PR China
| | - Mingwei Li
- College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, 266042, PR China
| | - Shuwu Zhang
- College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, 266042, PR China
| | - Yuhuan Sun
- College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, 266042, PR China
| | - Fayuan Wang
- College of Environment and Safety Engineering, Qingdao University of Science and Technology, Qingdao, Shandong, 266042, PR China.
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Tan Z, Luo Y, Sun X, Huang Y, Sun W. Biodegradation and bioaugmentation of the co-contamination of chloramphenicol and microplastics by Exiguobacterium sp. CAP4 isolated from a contaminated plastisphere. JOURNAL OF HAZARDOUS MATERIALS 2025; 491:137973. [PMID: 40122001 DOI: 10.1016/j.jhazmat.2025.137973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2025] [Revised: 02/14/2025] [Accepted: 03/15/2025] [Indexed: 03/25/2025]
Abstract
Microplastics (MPs) and antibiotics are newly emerging contaminants that have heavily accumulated in the environment and are a great cause of concern due to their co-contamination. Although the removal and degradation of individual MPs and antibiotics have been studied in various environments, our understanding of how to eliminate the co-contamination of MPs and antibiotics remains poor. In this study, the biodegradation of both micro polyethylene (mPE) and chloramphenicol (CAP) was analyzed in a wastewater sample. Members of the genera Exiguobacterium, Methanospirillum, Methanosaeta, and Candidatus Nitrocosmicus were proposed as biomarkers in plastisphere, which may contribute to the biodegradation of both contaminants. Notably, Exiguobacterium sp. CAP4 was isolated from the plastisphere and exhibited a high potential to degrade both CAP and mPE. Bioaugmentation with Exiguobacterium sp. CAP4 in mPEs and CAP contaminated wastewater facilitated the biodegradation of both mPE and CAP. This work expands the knowledge base regarding the simultaneous elimination of MPs and antibiotics in situ and identifies a promising bacterial strain for both MP and antibiotic biodegradation.
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Affiliation(s)
- Zewen Tan
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Yujiang Luo
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China; College of Food Science and Technology, Hunan Agricultural University, Changsha 410128, China
| | - Xiaoxu Sun
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Ying Huang
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Weimin Sun
- National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China, Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China.
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3
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Wang K, Flury M, Kuzyakov Y, Zhang H, Zhu W, Jiang R. Aluminum and microplastic release from reflective agricultural films disrupt microbial communities and functions in soil. JOURNAL OF HAZARDOUS MATERIALS 2025; 491:137891. [PMID: 40081051 DOI: 10.1016/j.jhazmat.2025.137891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2024] [Revised: 02/14/2025] [Accepted: 03/07/2025] [Indexed: 03/15/2025]
Abstract
Reflective agricultural films are widely used in vegetable production and orchards to repel pests, accelerate fruit ripening, and boost yields. These films, composed of a plastic base metallized with aluminum (Al), degrade over time in soil, releasing Al and microplastics. This study investigated the aging and weathering of Al-coated reflective films (polyethylene terephthalate, PET-based) under UV radiation, simulated rainfall, and soil burial for up to 120 days, assessing the effects of released Al and microplastics on soil chemistry and microbial communities. Weathering was confirmed by the formation of C-O/CO functional groups, an increasing carbonyl index, and the oxidation of Al to Al₂O₃, as shown by Fourier-transform infrared (FTIR) and X-ray photoelectron spectroscopy (XPS). Faster Al-coated shedding and PET oxidation were observed in the soil environment. Microplastics (0.5 % w/w) from the films reduced soil micronutrient availability (Fe, Mn, Cu), suppressed functional genes involved in carbon, nitrogen, and phosphorus cycling, and shifted microbial communities towards oligotrophic bacteria enrichment (e.g., RB41, Candidatus_Udaeobacter, Gemmatimonadetes, and Chloroflexi) while reducing copiotrophic bacteria (e.g., Sphingomonas, Ellin6067, Dongia, Puia, and Flavisolibacter). Therefore, these findings highlight that reflective film weathering strongly alters soil nutrient content and microbial community composition, with potential implications for soil health and agricultural sustainability.
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Affiliation(s)
- Kai Wang
- Research Center for Cultural Landscape Protection and Ecological Restoration, China-Portugal Joint Laboratory of Cultural Heritage Conservation Science Supported by the Belt and Road Initiative, Gold Mantis School of Architecture, Soochow University, Suzhou 215006, China; College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China
| | - Markus Flury
- Department of Crop and Soil Sciences, Washington State University, Pullman 99164 and Puyallup, WA 98371, United States
| | - Yakov Kuzyakov
- Department of Agricultural Soil Science, Georg-August, University of Göttingen, Göttingen 37077, Germany; Bioeconomy Research Institute, Vytautas Magnus University, Agriculture Academy, Studentu 11, LT-53361 Akademija, Kaunas Reg., Lithuania
| | - Hao Zhang
- Research Center for Cultural Landscape Protection and Ecological Restoration, China-Portugal Joint Laboratory of Cultural Heritage Conservation Science Supported by the Belt and Road Initiative, Gold Mantis School of Architecture, Soochow University, Suzhou 215006, China; College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China
| | - Wei Zhu
- College of Civil and Architecture Engineering, Chuzhou University, Chuzhou 239000, China
| | - Rui Jiang
- Research Center for Cultural Landscape Protection and Ecological Restoration, China-Portugal Joint Laboratory of Cultural Heritage Conservation Science Supported by the Belt and Road Initiative, Gold Mantis School of Architecture, Soochow University, Suzhou 215006, China.
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She Y, Wu L, Qi X, Sun S, Li Z. Aging behaviors intensify the impacts of microplastics on nitrate bioreduction-driven nitrogen cycling in freshwater sediments. WATER RESEARCH 2025; 279:123448. [PMID: 40064141 DOI: 10.1016/j.watres.2025.123448] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2024] [Revised: 02/17/2025] [Accepted: 03/05/2025] [Indexed: 05/06/2025]
Abstract
Microplastics (MPs) inevitably undergo aging processes in natural environments; however, how aging behaviors influence the interactions between MPs exposures and nitrate bioreduction in freshwater sediments remains poorly understood. Here, we explored the distinct impacts of virgin and aged MPs (polystyrene (PS) and polylactic acid (PLA)) on nitrate bioreduction processes in lake sediments through a long-term microcosm experiment utilizing the 15N isotope tracing technique and molecular analysis. Compared to virgin MPs, aged PLA significantly increased the rates of denitrification, anaerobic ammonium oxidation (anammox), and dissimilatory nitrate reduction to ammonium (DNRA) (p < 0.05), facilitating sediment nitrogen loss, while aged PS only significantly improved the rates of DNRA by 272-297 % and contributed to nitrogen retention in sediments. Metagenomic sequencing demonstrated that a more significant enrichment of functional genes responsible for nitrate bioreduction pathways occurred with aged MPs exposures than with virgin MPs. By combining analyses of MPs aging traits and the key drivers of nitrate bioreduction, we revealed that aging behaviors directly regulated sediment nutrient status (e.g., DOC/NOx- ratio) and microbiological properties (from genes to bacteria), thereby further determining the activity of nitrate bioreduction. This work provides new insights into the impacts of aged MPs on sediment nitrate reduction and highlights the role of MPs aging in future assessments of long-term MPs pollution in freshwater ecosystems.
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Affiliation(s)
- Yuecheng She
- State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University, Nanjing 210023, China; School of the Environment, Nanjing University, Nanjing 210023, China
| | - Liying Wu
- School of Ecology and Environment, Anhui Normal University, Wuhu, Anhui, 241002, China; State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Xin Qi
- State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University, Nanjing 210023, China; School of the Environment, Nanjing University, Nanjing 210023, China
| | - Siyu Sun
- State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University, Nanjing 210023, China; School of the Environment, Nanjing University, Nanjing 210023, China
| | - Zhengkui Li
- State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University, Nanjing 210023, China; School of the Environment, Nanjing University, Nanjing 210023, China.
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Chen K, Jin Z, Zhu Q, Hu X, Tian S, Wang Y, Sun Y, Yuan M, Yao H. Impacts of biodegradable microplastics on rhizosphere bacterial communities of Arabidopsis thaliana: Insights into root hair-dependent colonization. ENVIRONMENTAL RESEARCH 2025; 276:121496. [PMID: 40157415 DOI: 10.1016/j.envres.2025.121496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/03/2025] [Revised: 03/20/2025] [Accepted: 03/27/2025] [Indexed: 04/01/2025]
Abstract
Biodegradable microplastics (MPs) affect plant health by altering rhizosphere microbial communities. Root hairs create a unique niche for diverse microbes, but the effects of biodegradable MPs on root hair-dependent bacterial colonization are unclear, particularly the direct relationship between microbes in the rhizosphere and bulk soil. Here, the effects of polybutylene adipate terephthalate (PBAT) MPs on root hair-dependent bacterial colonization and diversity in the rhizosphere were revealed using an absolute quantitative method and in-situ zymography with two genotypes of Arabidopsis thaliana (long root hair, wild-type, WT and short root hair, rop2-1 mutant, ROP). The results showed that rhizosphere enzyme activity hotspots, bacterial diversity, and colonization increased from ROP to WT plants. PBAT MPs reduced root hair-dependent bacterial colonization and β-glucosidase hotspots by 17.1 % and 9.8 %, respectively. Despite increasing bacterial absolute abundance in both rhizosphere and bulk soil, PBAT MPs diminished bacterial community modularity and shifted bacterial life strategies from K- to r-strategy via elevated rRNA (rrn) copy numbers and copiotroph/oligotroph ratio. This study indicated that PBAT MPs decreased root hair-dependent bacterial colonization and diversity in the rhizosphere by altering the microbial life history strategies and increasing copiotrophic abundance. This study explained the effects of PBAT MPs on rhizosphere bacterial colonization and diversity from the perspective of root hairs.
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Affiliation(s)
- Keyi Chen
- Key Laboratory of Green Chemical Engineering Process of Ministry of Education, Hubei Key Laboratory of Microbial Transformation and Regulation of Biogenic Elements in the Middle Reaches of the Yangtze River, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, 430205, China
| | - Zhihui Jin
- Key Laboratory of Green Chemical Engineering Process of Ministry of Education, Hubei Key Laboratory of Microbial Transformation and Regulation of Biogenic Elements in the Middle Reaches of the Yangtze River, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, 430205, China
| | - Qing Zhu
- Key Laboratory of Green Chemical Engineering Process of Ministry of Education, Hubei Key Laboratory of Microbial Transformation and Regulation of Biogenic Elements in the Middle Reaches of the Yangtze River, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, 430205, China
| | - Xiaodie Hu
- Key Laboratory of Green Chemical Engineering Process of Ministry of Education, Hubei Key Laboratory of Microbial Transformation and Regulation of Biogenic Elements in the Middle Reaches of the Yangtze River, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, 430205, China
| | - Sijia Tian
- Key Laboratory of Green Chemical Engineering Process of Ministry of Education, Hubei Key Laboratory of Microbial Transformation and Regulation of Biogenic Elements in the Middle Reaches of the Yangtze River, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, 430205, China
| | - Yulin Wang
- Key Laboratory of Green Chemical Engineering Process of Ministry of Education, Hubei Key Laboratory of Microbial Transformation and Regulation of Biogenic Elements in the Middle Reaches of the Yangtze River, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, 430205, China
| | - Yaru Sun
- Key Laboratory of Green Chemical Engineering Process of Ministry of Education, Hubei Key Laboratory of Microbial Transformation and Regulation of Biogenic Elements in the Middle Reaches of the Yangtze River, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, 430205, China
| | - Ming Yuan
- Key Laboratory of Green Chemical Engineering Process of Ministry of Education, Hubei Key Laboratory of Microbial Transformation and Regulation of Biogenic Elements in the Middle Reaches of the Yangtze River, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, 430205, China.
| | - Huaiying Yao
- Key Laboratory of Green Chemical Engineering Process of Ministry of Education, Hubei Key Laboratory of Microbial Transformation and Regulation of Biogenic Elements in the Middle Reaches of the Yangtze River, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, 430205, China; Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control, Ningbo Urban Environment Observation and Research Station, Chinese Academy of Sciences, Ningbo, China.
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6
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Liu X, Xu G, Pei T, Wu Y, Huang T, Guo H, Liu T, Zhang H. Microplastic diversity stimulates N 2O emission during NO 3--N transformation by altering microbial interaction and electron consumption in eutrophic water. JOURNAL OF HAZARDOUS MATERIALS 2025; 489:137594. [PMID: 39955989 DOI: 10.1016/j.jhazmat.2025.137594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2024] [Revised: 01/25/2025] [Accepted: 02/10/2025] [Indexed: 02/18/2025]
Abstract
Microplastic mixtures, consisting of various types, are widespread in aquatic ecosystems. However, the role of microplastic diversity in influencing N2O emission during NO3--N transformation remains unclear, particularly in eutrophic water bodies. To address this, we established 10 microcosms with microplastic diversity of 0, 1, 3, and 5 and explored the effects of microplastic diversity on NO3--N transformation, N2O emission, microbial communities, co-occurrence networks, and electron transfer. Results showed that microplastic diversity slightly impacted NO3--N transformation rates, but remarkably enhanced N2O emission. Although elevated microplastic diversity caused notable variations in microbial community, bacterial abundance had insignificant correlations with NO3--N transformation or N2O emission rates. Notably, the increased microplastic diversity made microbial networks more complex and stable, indirectly promoting N2O emission by altering electron transfer and consumption during NO3--N transformation. Especially, electron consumption had the most direct effect on N2O emission. Furthermore, the increasing microplastic diversity slightly affected NOR activity, while significantly decreasing NOS activity and raising (nirK+nirS)/nosZ ratio, which suggested that microplastic diversity primarily enhanced N2O emission by inhibiting its further reduction. Our findings provide deeper insight into the nitrogen transformation and greenhouse gas emission influenced by microplastic mixtures in eutrophic aquatic environments.
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Affiliation(s)
- Xiaoyan Liu
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Guojia Xu
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Tingting Pei
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Yaoguo Wu
- School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710129, China
| | - Tinglin Huang
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Honghong Guo
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Tao Liu
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China
| | - Haihan Zhang
- Shaanxi Key Laboratory of Environmental Engineering, Key Laboratory of Northwest Water Resource, Environment and Ecology, MOE, Xi'an University of Architecture and Technology, Xi'an 710055, China; School of Environmental and Municipal Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China.
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Meng T, Bu H, Zhang X, Chen X, Wang W, Zhao M, Liu J, Zhang J, Zhang D, Lu Z, Zhao X. Degradable film mulching recruited beneficial microbiota and increased rhizosphere bacterial diversity in sunflower. Sci Rep 2025; 15:18522. [PMID: 40425721 DOI: 10.1038/s41598-025-03213-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2024] [Accepted: 05/19/2025] [Indexed: 05/29/2025] Open
Abstract
The degradable film can solve the problem that the traditional plastic film is difficult to recycle and heavy pollution for a long time. The effects of degraded film mulching on microbial diversity are significant. However, the responses of relevant microbial communities to degraded film mulching in different ecological niches (e.g., bulk soil, rhizosphere and endosphere) of sunflower roots are poorly understood. This study analyzed the effects of plastics film mulching on bacterial and fungal α-diversities (Shannon index), community assembly process, key dominant species of sunflower different ecological niches in roots. The results showed that degradable film mulching significantly increased the α-diversity (Shannon index) of bulk soil and rhizosphere soil bacteria and decreased the α-diversity of fungi (Shannon index), and the mulching treatment promoted the gradual shift of the rhizosphere microbial community assembly process to a deterministic process. Degradation film mulching increased the connectivity and complexity of bacterial networks and decreased the complexity of fungal networks. Plastic film mulching improves soil nutrients, temperature and moisture, enhances the positive correlation among microorganisms. At the same time, core species such as Amycolatopsis, Rhizobiaceae, and Sphingomonas that recruit beneficial microorganisms and accelerate the degradation of plastic film are significantly enriched. Degradable film covering promoted soil nutrient cycling, increased urease, alkaline phosphatase, sucrase, and thus increased sunflower yield. A comprehensive analysis of random forest and structural equations showed that the main driving microbial factors of yield were bulk soil bacterial diversity and endosphere fungal diversity. This study provides new ideas for the analysis of soil microbial mutual feedback mechanisms between degraded film mulch and rhizosphere ecosystems.
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Affiliation(s)
- Tiantian Meng
- Hebei Agricultural University, Baoding, 071000, China
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, 010031, China
| | - Hengtong Bu
- Inner Mongolia University, Hohhot, 010021, China
| | - Xiangqian Zhang
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, 010031, China.
- Key Laboratory of Ecological Restoration and Pollution Prevention of Degraded Farmlan d of Inner Mongolia Autonomous Region, Hohhot, 010031, China.
| | - Xuanyi Chen
- Inner Mongolia University, Hohhot, 010021, China
| | - Weini Wang
- Erdos Agricultural and Animal Husbandry Technology Extension Center, Ordos, 017000, China
| | - Min Zhao
- Inner Mongolia University, Hohhot, 010021, China
| | - Junmei Liu
- Erdos Agricultural and Animal Husbandry Technology Extension Center, Ordos, 017000, China
| | - Jianwei Zhang
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, 010031, China
| | - Dejian Zhang
- Inner Mongolia University, Hohhot, 010021, China.
| | - Zhanyuan Lu
- Hebei Agricultural University, Baoding, 071000, China.
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, 010031, China.
- Inner Mongolia University, Hohhot, 010021, China.
- Key Laboratory of Ecological Restoration and Pollution Prevention of Degraded Farmlan d of Inner Mongolia Autonomous Region, Hohhot, 010031, China.
| | - Xiaoyu Zhao
- Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot, 010031, China
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Jiang Z, Zeng J, Wang X, Yu H, Yue L, Wang C, Chen F, Wang Z. Biodegradable microplastics and dissemination of antibiotic resistance genes: An undeniable risk associated with plastic additives. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2025; 372:125952. [PMID: 40032228 DOI: 10.1016/j.envpol.2025.125952] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2024] [Revised: 02/03/2025] [Accepted: 02/27/2025] [Indexed: 03/05/2025]
Abstract
Biodegradable plastics (BDPs) represent a promising alternative to conventional plastics; however, the release of microplastics (MPs) during degradation necessitates an urgent investigation into their biological effects. The potential risks associated with MPs and additives released from BDPs, particularly in facilitating the dissemination of antibiotic resistance genes (ARGs), remain largely unknown. This study aims to investigate the effects of polylactic acid (PLA) MPs and their common plasticizer, dibutyl phthalate (DBP), on the horizontal gene transfer (HGT) of ARGs using conjugative transfer and transformation model systems. The viability of Escherichia coli (E. coli) cells after exposure to PLA MPs (0.01, 0.1, 1, and 10 mg L-1), DBP (0.01, 0.1, 1, and 10 μg L-1) alone, or in combination (1 mg L-1 PLA MPs + 1 μg L-1DBP) remained unaffected. Exposure to PLA MPs at environmentally relevant concentrations did not promote the HGT of ARGs. However, the addition of DBP significantly enhanced the transfer frequency by 1.5-1.8 folds compared to exposure to PLA MPs alone. The accelerated dissemination of ARGs was primarily attributed to the elevated levels of reactive oxygen species (by 26.2%), increased membrane permeability (by 19.4%), and the up-regulation of genes involved in mating pair formation (by 1.6-3.8 folds) and DNA translocation (by 1.5-3.4 folds). These findings underscore the critical role of additives and highlight the potential accumulative effects associated with prolonged exposure to high concentrations of PLA MPs, which should be considered for a comprehensive risk assessment of BDPs.
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Affiliation(s)
- Zhaoheng Jiang
- College of Forestry and Grassland, Nanjing Forestry University, Nanjing, 210037, China; Institute of Environmental Processes and Pollution Control, and School of Environment and Ecology, Jiangnan University, Wuxi, 214122, China
| | - Jianxiong Zeng
- Institute of Environmental Processes and Pollution Control, and School of Environment and Ecology, Jiangnan University, Wuxi, 214122, China
| | - Xi Wang
- Institute of Environmental Processes and Pollution Control, and School of Environment and Ecology, Jiangnan University, Wuxi, 214122, China
| | - Hanxiao Yu
- Institute of Environmental Processes and Pollution Control, and School of Environment and Ecology, Jiangnan University, Wuxi, 214122, China
| | - Le Yue
- Institute of Environmental Processes and Pollution Control, and School of Environment and Ecology, Jiangnan University, Wuxi, 214122, China
| | - Chuanxi Wang
- Institute of Environmental Processes and Pollution Control, and School of Environment and Ecology, Jiangnan University, Wuxi, 214122, China
| | - Feiran Chen
- College of Forestry and Grassland, Nanjing Forestry University, Nanjing, 210037, China; Institute of Environmental Processes and Pollution Control, and School of Environment and Ecology, Jiangnan University, Wuxi, 214122, China.
| | - Zhenyu Wang
- Institute of Environmental Processes and Pollution Control, and School of Environment and Ecology, Jiangnan University, Wuxi, 214122, China
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Kim SW, Šmídová K, van Loon S, van Gestel CAM, Rillig MC, Fritze H, Velmala S. Effects of biodegradable microplastics on soil microbial communities and activities: Insight from an ecological mesocosm experiment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2025; 975:179288. [PMID: 40168740 DOI: 10.1016/j.scitotenv.2025.179288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2024] [Revised: 02/05/2025] [Accepted: 03/28/2025] [Indexed: 04/03/2025]
Abstract
Microplastics (MP) are being released into the environment at an increasing rate, causing extensive pollution in soils and affecting biota and processes. Although the use of biodegradable plastic has increased, its effects on the soil microbial community are not yet well understood. A controlled mesocosm experiment was conducted to investigate the response of soil microbial communities to increasing amounts of starch-polybutylene adipate terephthalate MPs (PBAT-BD-MPs) added to the soil. The experiment included microbes, earthworms, springtails, and plants. The PBAT-BD-MPs were added to the soil column at doses ranging from 0 to 0.8 % w/w of soil dry mass, and the columns were incubated for 11 weeks under controlled climatic conditions. Bacterial and fungal amplicon sequencing was used to investigate the dose-dependent response of the soil microbial communities' alpha and beta diversity. The alpha diversity indices of the bacterial and fungal communities increased with increasing PBAT-BD-MP concentration. Bacterial richness was highest at the highest MP concentration (0.8 %). A similar trend was observed in the fungal community, with a significant increase in fungal richness as PBAT-BD-MP concentration increased. The alpha diversity of both bacterial and fungal communities significantly increased in MP treatments compared to the control treatment. At the highest MP concentration (0.8 %), the abundance of the bacterial phylum Planctomycetes showed a significant increase, while Firmicutes showed a significant decrease. The abundance of the fungal phyla Ascomycota and Mortierellomycota also significantly increased at the highest PBAT-BD-MP concentration compared to the control group. Alongside changes in the soil microbial community, we observed a rise in soil respiration as the concentration of PBAT-BD-MPs increased. Our three-month mesocosm study demonstrates that the introduction of biodegradable microplastics into the natural standard soil environment in realistic concentrations (0-0.025-0.05-0.2-0.8 %) and particle size distribution alters the soil bacterial and fungal community.
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Affiliation(s)
- Shin Woong Kim
- Institute of Biology, Freie Universität Berlin, 14195 Berlin, Germany; Berlin-Brandenburg Institute of Advanced Biodiversity Research, 14195 Berlin, Germany; Center for Ecotoxicology and Environmental Future Research, Korea Institute of Toxicology, 17 Jegok-gil, Jinju 52834, Republic of Korea
| | - Klára Šmídová
- RECETOX, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Sam van Loon
- Amsterdam Institute for Life and Environment (A-LIFE), Faculty of Science, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, the Netherlands
| | - Cornelis A M van Gestel
- Amsterdam Institute for Life and Environment (A-LIFE), Faculty of Science, Vrije Universiteit Amsterdam, De Boelelaan 1108, 1081 HZ Amsterdam, the Netherlands
| | - Matthias C Rillig
- Institute of Biology, Freie Universität Berlin, 14195 Berlin, Germany; Berlin-Brandenburg Institute of Advanced Biodiversity Research, 14195 Berlin, Germany
| | - Hannu Fritze
- Natural Resources Institute Finland (Luke), Latokartanonkaari 9, 00790 Helsinki, Finland
| | - Sannakajsa Velmala
- Natural Resources Institute Finland (Luke), Latokartanonkaari 9, 00790 Helsinki, Finland.
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10
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Liu J, Zhao Y, Hao N, Sun P, Deng Z, Zhao W. Exposure Risk Identification and Priority Control List Development of Pesticides in Agricultural Cultivation Areas. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2025; 73:8172-8190. [PMID: 40139734 DOI: 10.1021/acs.jafc.4c12155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/29/2025]
Abstract
The adverse effects of 33 typical pesticides in dry and paddy lands in typical cultivation areas of China were investigated. First, the resistance and cross-resistance (for target organisms), toxicity, and joint toxicity (for nontarget organisms) of pesticides were evaluated, and nine pesticides with high resistance, three with wide cross-resistance, nine with high toxicity, and one with wide joint toxicity were screened. Second, the optimal synergist control schemes in dry and paddy lands were developed, under which resistance to target organisms (corn aphid, soybean aphid, and rice water weevil) reduced by 23.46%, 46.06%, and 26.36% (maximum), respectively, and toxicity (neurotoxicity and developmental toxicity) to nontarget organisms (ladybird beetle, parasitic wasp, and Chinese mitten crab) reduced by 38.83%, 17.76%, and 15.94% (maximum), respectively. Third, the multitoxicity (neurotoxicity, metabolic toxicity, developmental toxicity, carcinogenicity, reproductive toxicity, and respiratory toxicity) adverse outcome pathway based on human health risk was constructed, and 10 pesticides with higher risk and composite risk were identified. Finally, the total exposure risk of 33 typical pesticides was predicted, and a priority control list was proposed. This study provides theoretical guidance for controlling pesticide application to achieve the green and sustainable development of agricultural soils.
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Affiliation(s)
- Jiapeng Liu
- College of New Energy and Environment, Jilin University, Changchun 130012, China
| | - Yuanyuan Zhao
- College of New Energy and Environment, Jilin University, Changchun 130012, China
| | - Ning Hao
- College of New Energy and Environment, Jilin University, Changchun 130012, China
| | - Peixuan Sun
- College of New Energy and Environment, Jilin University, Changchun 130012, China
| | - Zhengyang Deng
- College of New Energy and Environment, Jilin University, Changchun 130012, China
| | - Wenjin Zhao
- College of New Energy and Environment, Jilin University, Changchun 130012, China
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11
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Yu H, Zhang M, Liu H, Xiao J, Men J, Cernava T, Deng Y, Jin D. Comparison of plastisphere microbiomes during the degradation of conventional and biodegradable mulching films. JOURNAL OF HAZARDOUS MATERIALS 2025; 487:137243. [PMID: 39826464 DOI: 10.1016/j.jhazmat.2025.137243] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2024] [Revised: 12/16/2024] [Accepted: 01/14/2025] [Indexed: 01/22/2025]
Abstract
Biodegradable mulch films (BDMs) are becoming increasingly popular in agriculture and are emerging as an alternative to conventional polyethylene (PE) films. However, the intricate details surrounding the establishment and growth of microorganisms on BDMs and PE during their degradation in agricultural fields remain unclear. In this study, the succession of bacterial communities in farmland soil and the plastispheres of PE and BDMs were compared through 16S rRNA gene high-throughput sequencing and real-time PCR. The results unveiled noteworthy distinctions in bacterial community structures across different samples. Specifically, the α-diversity in the BDM plastispheres was markedly lower than in the PE plastisphere. Hydrogenophaga and Variovorax genera were abundantly present in the BDM plastisphere, whereas Mycobacterium demonstrated significant enrichment in the PE plastisphere. Functional annotations indicated high abundances of degradation-related and pathogen-related functions in both BDM and PE plastispheres. Furthermore, the BDM plastisphere exhibited lower network complexity and modularity and stronger competitive interactions than the PE plastisphere. The conducted iCAMP analysis showed that stochastic community assembly processes largely govern the PE plastisphere, while deterministic processes prevailed in BDMs and increased significantly over time. These findings shed light on different mulching materials' effects in farmland ecosystems and provide insights into potential ecological risks linked to their usage.
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Affiliation(s)
- Hao Yu
- College of Environmental Science and Engineering, Liaoning Technical University, Fuxin 123000, China
| | - Mingyang Zhang
- College of Environmental Science and Engineering, Liaoning Technical University, Fuxin 123000, China; Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Huiying Liu
- Liaoning Academy of Agricultural Sciences, Shenyang 110161, China
| | - Juanjuan Xiao
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Jianan Men
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Tomislav Cernava
- Institute of Environmental Biotechnology, Graz University of Technology, Petersgasse 12, Graz 8010, Austria; School of Biological Sciences, Faculty of Environmental and Life Sciences, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Ye Deng
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Decai Jin
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
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12
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Huang J, Liu Y, Xie H, Liu X, Feng Y, Wang B. Soil nitrogen deficiency aggravated the aging of biodegradable microplastics in paddy soil under the input of organic substances with contrasting C/N ratios. JOURNAL OF HAZARDOUS MATERIALS 2025; 487:137176. [PMID: 39813929 DOI: 10.1016/j.jhazmat.2025.137176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2024] [Revised: 12/27/2024] [Accepted: 01/08/2025] [Indexed: 01/18/2025]
Abstract
The application of organic substances to the agricultural field has effectively enhanced soil nutrient levels and crop yields. Biodegradable microplastics (bio-MPs), a pervasive emerging contaminant, may potentially impact the soil ecosystem through their aging process. Here, a 150-day dark incubation experiment was conducted to elucidate the disparities in the aging process of polylactic acid bio-MPs (PLA-MPs) in soils with contrasting C/N ratios of organic substances, as the mechanisms underlying this process remain unclear. The study found that PLA-MPs resulted in an increase in soil pH, nutrient levels, and organic carbon content in soil-straw system. Additionally, PLA-MPs significantly influenced bacterial community composition and microbial metabolic activity in soil-straw system. Notably, more pronounced aging features of PLA-MPs was observed in soil-straw system (lower soil nitrogen environment) compared to soil-fertilizer system (higher soil nitrogen environment). Under lower soil nitrogen conditions, microorganisms may accelerate the aging process of PLA-MPs due to their preference for readily available energy sources; conversely, under higher soil nitrogen conditions, the aging of PLA-MPs may be decelerated as microorganisms preferentially utilize substances with easily accessible energy sources. Our findings provide valuable insights into the interaction between PLA-MPs and soil amended with the organic substances of contrasting C/N ratios.
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Affiliation(s)
- Junxia Huang
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; Key Laboratory of Agro-Environment in Downstream of Yangtze Plain, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Yidan Liu
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China; Key Laboratory of Agro-Environment in Downstream of Yangtze Plain, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Huifang Xie
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Xiaobo Liu
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| | - Yanfang Feng
- Key Laboratory of Agro-Environment in Downstream of Yangtze Plain, Ministry of Agriculture and Rural Affairs, Institute of Agricultural Resources and Environment, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China.
| | - Bingyu Wang
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, China.
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Nava V, Dar JY, De Santis V, Fehlinger L, Pasqualini J, Adekolurejo OA, Burri B, Cabrerizo MJ, Chonova T, Cour M, Dory F, Drost AM, Figler A, Gionchetta G, Halabowski D, Harvey DR, Manzanares‐Vázquez V, Misteli B, Mori‐Bazzano L, Moser V, Rotta F, Schmid‐Paech B, Touchet CM, Gostyńska J. Zooming in the plastisphere: the ecological interface for phytoplankton-plastic interactions in aquatic ecosystems. Biol Rev Camb Philos Soc 2025; 100:834-854. [PMID: 39542439 PMCID: PMC11885710 DOI: 10.1111/brv.13164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Revised: 10/23/2024] [Accepted: 10/30/2024] [Indexed: 11/17/2024]
Abstract
Phytoplankton is an essential resource in aquatic ecosystems, situated at the base of aquatic food webs. Plastic pollution can impact these organisms, potentially affecting the functioning of aquatic ecosystems. The interaction between plastics and phytoplankton is multifaceted: while microplastics can exert toxic effects on phytoplankton, plastics can also act as a substrate for colonisation. By reviewing the existing literature, this study aims to address pivotal questions concerning the intricate interplay among plastics and phytoplankton/phytobenthos and analyse impacts on fundamental ecosystem processes (e.g. primary production, nutrient cycling). This investigation spans both marine and freshwater ecosystems, examining diverse organisational levels from subcellular processes to entire ecosystems. The diverse chemical composition of plastics, along with their variable properties and role in forming the "plastisphere", underscores the complexity of their influences on aquatic environments. Morphological changes, alterations in metabolic processes, defence and stress responses, including homoaggregation and extracellular polysaccharide biosynthesis, represent adaptive strategies employed by phytoplankton to cope with plastic-induced stress. Plastics also serve as potential habitats for harmful algae and invasive species, thereby influencing biodiversity and environmental conditions. Processes affected by phytoplankton-plastic interaction can have cascading effects throughout the aquatic food web via altered bottom-up and top-down processes. This review emphasises that our understanding of how these multiple interactions compare in impact on natural processes is far from complete, and uncertainty persists regarding whether they drive significant alterations in ecological variables. A lack of comprehensive investigation poses a risk of overlooking fundamental aspects in addressing the environmental challenges associated with widespread plastic pollution.
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Affiliation(s)
- Veronica Nava
- Department of Earth and Environmental SciencesUniversity of Milano‐BicoccaPiazza della Scienza 1Milan20126Italy
| | - Jaffer Y. Dar
- ICAR‐Central Soil Salinity Research InstituteKarnal132001India
- Department of Experimental LimnologyLeibniz Institute of Freshwater Ecology and Inland FisheriesMüggelseedamm 310Berlin12587Germany
| | - Vanessa De Santis
- Water Research Institute, National Research CouncilCorso Tonolli 50Verbania‐PallanzaVerbania28922Italy
| | - Lena Fehlinger
- GEA Aquatic Ecology GroupUniversity of Vic ‐ Central University of CataloniaCarrer de la Laura 13Catalonia08500 VicSpain
| | - Julia Pasqualini
- Department of River EcologyHelmholtz Centre for Environmental Research‐UFZBrückstr. 3aMagdeburg39114Germany
| | - Oloyede A. Adekolurejo
- Ecology and Evolution, School of BiologyUniversity of LeedsLeedsLS2 9JTUK
- Department of BiologyAdeyemi Federal University of EducationOndo CityOndoPMB 520Nigeria
| | - Bryan Burri
- Department F‐A. Forel for Environmental and Aquatic SciencesUniversity of Geneva, 30 Quai Ernest‐Ansermet Sciences IIGenèveCH‐1205Switzerland
| | - Marco J. Cabrerizo
- Department of Ecology & Institute of Water ResearchUniversity of GranadaCampus Fuentenueva s/nGranada18071Spain
- Estación de Fotobiología Playa Unióncasilla de correos 15RawsonChubut9103Argentina
| | - Teofana Chonova
- Department Environmental ChemistryEawag: Swiss Federal Institute of Aquatic Science and TechnologyÜberlandstr. 133DübendorfCH‐8600Switzerland
| | | | - Flavia Dory
- Department of Earth and Environmental SciencesUniversity of Milano‐BicoccaPiazza della Scienza 1Milan20126Italy
| | - Annemieke M. Drost
- Department of Aquatic EcologyNetherlands Institute of EcologyDroevendaalsesteeg 10Wageningen6708 PBThe Netherlands
- Department of Freshwater and Marine Ecology, Institute for Biodiversity and Ecosystem Dynamics (IBED)University of AmsterdamP.O. Box 94240Amsterdam1090 GEThe Netherlands
| | - Aida Figler
- Department of BioinformaticsSemmelweis UniversityTűzoltó utca 7‐9Budapest1094Hungary
| | - Giulia Gionchetta
- Department of Environmental Chemistry, Institute of Environmental Assessment and Water Research (IDAEA)Spanish Council of Scientific Research (CSIC)Barcelona0803Spain
| | - Dariusz Halabowski
- Department of Ecology and Vertebrate Zoology, Faculty of Biology and Environmental ProtectionUniversity of LodzBanacha 12/16Lodz90‐237Poland
| | - Daniel R. Harvey
- Lake Ecosystems Group, UK Centre for Ecology & HydrologyLancaster Environment CentreLibrary Avenue, BailriggLancasterLA1 4APUK
- Lancaster Environment CentreLancaster UniversityLancasterLA1 4YQUK
| | - Víctor Manzanares‐Vázquez
- Department of Research and DevelopmentCoccosphere Environmental AnalysisC/Cruz 39, 29120 Alhaurín el GrandeMálagaSpain
| | - Benjamin Misteli
- WasserCluster Lunz ‐ Biologische StationDr Carl Kupelwieser Promenade 5Lunz am See3293Austria
| | - Laureen Mori‐Bazzano
- Department F‐A. Forel for Environmental and Aquatic SciencesUniversity of Geneva, 30 Quai Ernest‐Ansermet Sciences IIGenèveCH‐1205Switzerland
| | - Valentin Moser
- Community Ecology, Swiss Federal Institute for ForestSnow and Landscape Research WSLZürcherstrasse 111BirmensdorfCH‐8903Switzerland
- Department of Aquatic EcologyEawag: Swiss Federal Institute of Aquatic Science and TechnologyÜberlandstrasse 133DübendorfCH‐8600Switzerland
| | - Federica Rotta
- Department of Earth and Environmental SciencesUniversity of PaviaVia Ferrata 1Pavia27100Italy
- Institute of Earth ScienceUniversity of Applied Science and Arts of Southern SwitzerlandVia Flora Ruchat‐Roncati 15MendrisioCH‐6850Switzerland
| | - Bianca Schmid‐Paech
- University Weihenstephan‐Triesdorf of Applied ScienceAm Hofgarten 4Freising85354Germany
| | - Camille M. Touchet
- Université Claude Bernard ‐ Lyon 1, “LEHNA UMR 5023, CNRS, ENTPE3‐6, rue Raphaël DuboisVilleurbanneF‐69622France
| | - Julia Gostyńska
- Department of Hydrobiology, Faculty of BiologyAdam Mickiewicz UniversityUniwersytetu Poznanskiego 6Poznan61‐614Poland
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Katsumi N, Kusube T. Runoff and accumulation of microplastics derived from polymer-coated fertilizer in Japanese paddy fields. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2025; 44:935-943. [PMID: 39832270 DOI: 10.1093/etojnl/vgaf021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2024] [Revised: 01/05/2025] [Accepted: 01/08/2025] [Indexed: 01/22/2025]
Abstract
Polymer-coated fertilizers, widely used in rice cultivation in Japan, contribute to reactive nitrogen management and agricultural productivity but are a source of microplastics in the environment. Here, we investigated microplastics derived from polymer-coated fertilizer (microcapsule) runoff in Japanese paddy fields at 38 sites to quantitatively assess the behavior of microcapsules in paddy fields and to estimate the total amount of runoff and accumulation in Japan. We also examined the factors causing variations in the amount of runoff among paddy fields. Between 61% and 100% of microcapsule runoff during the irrigation period occurred between puddling and rice transplanting, with concentrations ranging from 2-482 mg/m2 in paddy fields. Water management practices and wind direction and speed explained the difference in runoff between plots. The total amount of microcapsules discharged from Japanese paddy fields during the irrigation season was estimated to be between 17 and 6,291 t (median 1,157 t) from the loads obtained in this study. According to fertilizer statistics and our results, total microcapsule accumulation on agricultural land in Japan was estimated to be 75,623 t. These results suggest that paddy fields in Japan will remain a long-term source of marine microplastics.
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Affiliation(s)
- Naoya Katsumi
- Faculty of Bioresources and Environmental Sciences, Ishikawa Prefectural University, Nonoichi, Ishikawa, Japan
| | - Takasei Kusube
- Research Institute for Bioresources and Biotechnology, Ishikawa Prefectural University, Nonoichi, Ishikawa, Japan
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15
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Du F, Hou M, Lu S, Ding X, Zhang L, Du Y, An Z, Cai W, Zhao L, Wu W, Cao Z. Toxicity enhancement of microplastics released from food containers through thermal aging: Absorbing more serum proteins thus activating the innate immune response via actin polymerization. ENVIRONMENT INTERNATIONAL 2025; 197:109358. [PMID: 40049044 DOI: 10.1016/j.envint.2025.109358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/16/2024] [Revised: 02/01/2025] [Accepted: 02/28/2025] [Indexed: 03/25/2025]
Abstract
This study examined the effects of hot high-fat simulants on the physicochemical properties of microplastics (MPs) from polypropylene (PP)-, low-density polyethylene (LDPE)-, and polylactic acid (PLA)-based single-use food container (SUFC) leachates and those of aging on their immunomodulatory effectors. Scenario studies have demonstrated that MPs were released from these three types of SUFCs. LDPE- and PLA-based SUFCs also released cellulose. Among the SUFCs, only the PP leachates particles exhibited a new absorption peak at 1725 cm-1, which aging phenomenon may be attributed to the presence of unstable tertiary carbon atoms. Subsequently, we investigated the immunomodulatory effects of removing additive both PP and thermal-aged PP with polystyrene (PS) and carboxyl-modified PS (PS-COOH) polymer backbones as reference materials. The findings indicated that thermal-aged PP and PS-COOH induced comparable innate immune responses, with PS-COOH particles exhibiting a similar size to SUFC percolates. Consequently, PS and PS-COOH were selected as original and thermal-aged MPs, respectively, to evaluate the effects of aging on innate immunity. The results revealed thata protein corona formed on both particle types, with more protein adsorption observed on PS-COOH particles. The complex enhanced the phagocytosis of RAW264.7 macrophages and increased the expression of pro-inflammatory genes NOS2 and TNF-α through an actin polymerization cross-linking mechanism. In this study, we investigated how thermal-aged MPs affect innate immune responses using PS-COOH as a model system, emphasizing the importance of a comprehensive safety evaluations of MPs.
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Affiliation(s)
- Fang Du
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China
| | - Meiqian Hou
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China
| | - Song Lu
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China
| | - Xiaotian Ding
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China
| | - Ling Zhang
- School of Public Health, Henan International Collaborative Laboratory for Health Effects and Intervention of Air Pollution, Xinxiang Medical University, Xinxiang 453003, China
| | - Yajie Du
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China
| | - Zhen An
- School of Public Health, Henan International Collaborative Laboratory for Health Effects and Intervention of Air Pollution, Xinxiang Medical University, Xinxiang 453003, China
| | - Wenwen Cai
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China; Huanghuai Laboratory, Zhengzhou, Henan 450003, China
| | - Leicheng Zhao
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China; Huanghuai Laboratory, Zhengzhou, Henan 450003, China
| | - Weidong Wu
- School of Public Health, Henan International Collaborative Laboratory for Health Effects and Intervention of Air Pollution, Xinxiang Medical University, Xinxiang 453003, China.
| | - Zhiguo Cao
- School of Environment, Key Laboratory for Yellow River and Huai River Water Environment and Pollution Control, Ministry of Education, Henan Normal University, Xinxiang 453007, China; Huanghuai Laboratory, Zhengzhou, Henan 450003, China.
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16
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Zhang Z, Zhao J, Li K, Wang X, Xu H, Mao D, Liu S. "Tire plastisphere" in aquatic ecosystems: Biofilms colonizing on tire particles exhibiting a distinct community structure and assembly compared to conventional plastisphere. JOURNAL OF HAZARDOUS MATERIALS 2025; 483:136660. [PMID: 39603124 DOI: 10.1016/j.jhazmat.2024.136660] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2024] [Revised: 11/13/2024] [Accepted: 11/24/2024] [Indexed: 11/29/2024]
Abstract
Tire particles (TPs) significantly contribute to microplastics in aquatic ecosystems, which has recently attracted ecological concerns worldwide. Numerous studies have shown that biofilms on microplastics harbor unique species and harmful functions, but it remains unclear whether TPs could offer distinct niches for biofilms compared to conventional microplastics (CP). This study investigated the succession and assembly of biofilms on TPs compared with CP over 60 days. Our results showed the community structures of biofilms on TPs and CP were distinct. Intriguingly, a greater structural dissimilarity was observed between TPs-associated communities and natural biofilms compared to that between CP-associated communities and natural biofilms. This dissimilarity became more pronounced as biofilms progressed through succession. Furthermore, the bacterial community on the TPs exhibits a network of greater complexity, more stable structure, and higher activity than that on the CP, but the pattern was reversed in the eukaryotic community. Deterministic processes had a more critical impact on bacterial communities on TPs, whereas distinct stochastic processes controlled eukaryotic communities on TPs (dispersal limitation) and CP (undominated processes). Altogether, this study tentatively introduced the term "tire plastisphere" (i.e., TP-attached biofilms), emphasizing TPs could serve as more artificial microbial habitats and pose potential risks in disturbing aquatic ecology.
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Affiliation(s)
- Zixuan Zhang
- School of Civil Engineering, Shandong University, Jinan, Shandong 250061, China
| | - Jia Zhao
- School of Civil Engineering, Shandong University, Jinan, Shandong 250061, China
| | - Kun Li
- School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - Xun Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Hongzhe Xu
- Dept of Biostatistics and Computational Biology, University of Rochester, Rochester, NY, USA
| | - Deqiang Mao
- School of Civil Engineering, Shandong University, Jinan, Shandong 250061, China
| | - Sheng Liu
- School of Civil Engineering, Shandong University, Jinan, Shandong 250061, China.
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17
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Reid CJ, Farrell M, Kirby JK. Microbial communities in biosolids-amended soils: A critical review of high-throughput sequencing approaches. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2025; 375:124203. [PMID: 39854900 DOI: 10.1016/j.jenvman.2025.124203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2024] [Revised: 01/07/2025] [Accepted: 01/17/2025] [Indexed: 01/27/2025]
Abstract
Sustainable reuse of treated wastewater sludge or biosolids in agricultural production requires comprehensive understanding of their risks and benefits. Microbes are central mediators of many biosolids-associated risks and benefits, however understanding of their responses to biosolids remains minimal. Application of biosolids to soils amounts to a coalescence of two distinct microbial communities adapted to vastly different matrices. High-throughput DNA and RNA sequencing (HTS) approaches are required to accurately describe the compositional and functional outcomes of this process as they currently provide the highest possible resolution to deal with complex community-scale phenomena. Furthermore, linkage of HTS data to physicochemical and functional data can reveal biotic and abiotic drivers of coalescence, impacts of biosolids-borne contaminants and the collective downstream implications for soil and plant health. Here we review the current body of literature examining microbial communities in biosolids-amended soils using HTS of total community DNA and RNA. We provide a critical synthesis of soil microbial community composition and functional responses, the physical, chemical and biological drivers of these responses, and the influence of three major biosolids-borne anthropogenic contaminants of concern; antimicrobials and antimicrobial resistance genes, plastics, and per- and polyfluoroalkyl substances (PFAS). Finally, we identify methodological limitations and outstanding research questions precluding a holistic understanding of microbial responses in biosolids-amended soils and envision future research whereby sequence-based microbial ecology is integrated with soil, plant, and contaminant data to preserve soil health, support plant productivity, and remediate contaminants.
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Affiliation(s)
- Cameron J Reid
- Commonwealth Scientific and Industrial Research Organisation, Environment Research Unit, Urrbrae, South Australia, Australia.
| | - Mark Farrell
- Commonwealth Scientific and Industrial Research Organisation, Agriculture and Food Research Unit, Urrbrae, South Australia, Australia
| | - Jason K Kirby
- Commonwealth Scientific and Industrial Research Organisation, Environment Research Unit, Urrbrae, South Australia, Australia
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18
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Chen Y, Huang M, Fu Y, Gao T, Gan Z, Meng F. Construction of polylactic acid plastisphere microbiota for enhancing nitrate reduction in denitrification biofilters. BIORESOURCE TECHNOLOGY 2025; 417:131853. [PMID: 39577778 DOI: 10.1016/j.biortech.2024.131853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2024] [Revised: 11/06/2024] [Accepted: 11/19/2024] [Indexed: 11/24/2024]
Abstract
Developing methods for reusing biodegradable plastics, like polylactic acid (PLA) straws, is highly needed. Here, PLAs were applied to substitute traditional commercial ceramic media (CCM) in denitrification biofilters. During long-term operation, replacing CCM with PLA significantly enhanced nitrate removal efficiency from 32.68-54.39 % to 41.64-66.26 %. Ammonia nitrogen effluent maintained below 0.5 mg/L in all reactors. PLA plastisphere shaped unique microbial communities, i.e., denitrifying bacteria Bacillus, Pseudomonas and Acidovorax preferred to inhabit or degrade PLA. Compared to CCM biofilms, PLA diminished the importance of stochastic process in biofilm assembly of PLA plastisphere. Metagenomic sequencing suggested that PLA biofilms possessed greater metabolic capabilities of denitrification and glycolysis compared to CCM. Additionally, Bacillus strain P01 isolated from PLA plastisphere demonstrated strong PLA depolymerization. Overall, this study revealed that PLA serves as carbon source and biofilm carrier, offering a promising approach to integrating plastic reuse with wastewater treatment.
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Affiliation(s)
- Yanxi Chen
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-sen University), Guangzhou 510275, PR China
| | - Mengzhen Huang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-sen University), Guangzhou 510275, PR China
| | - Yue Fu
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-sen University), Guangzhou 510275, PR China
| | - Tianyu Gao
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-sen University), Guangzhou 510275, PR China
| | - Zhihao Gan
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-sen University), Guangzhou 510275, PR China
| | - Fangang Meng
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-sen University), Guangzhou 510275, PR China.
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19
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Liu X, Wen Z, Zhou W, Dong W, Ren H, Liang G, Gong W. Effect of Multiyear Biodegradable Plastic Mulch on Soil Microbial Community, Assembly, and Functioning. Microorganisms 2025; 13:259. [PMID: 40005626 PMCID: PMC11857403 DOI: 10.3390/microorganisms13020259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2024] [Revised: 01/21/2025] [Accepted: 01/22/2025] [Indexed: 02/27/2025] Open
Abstract
The increasing use of biodegradable plastic mulch like polybutylene adipate terephthalate (PBAT) has raised concerns about its long-term environmental impact. In this study, we investigated the effects of multiyear PBAT mulch application on bacterial and fungal communities, assembly mechanisms, and key ecological functions. The microbial community diversity and composition were significantly altered after multiyear biodegradable plastic mulching. We observed that PBAT treatment enriched specific bacterial genera, such as Pantoea, potentially involved in plastic degradation, and fungal genera like Cephaliophora and Stephanosporaceae, which may play a role in organic matter decomposition. A null model analysis revealed that bacterial community assembly was largely shaped by deterministic processes, with stronger environmental selection pressures in PBAT-treated soils, while fungal communities were more influenced by stochastic processes. In addition, multiyear PBAT mulch application also impacted the functionality of the soil microbial communities. PBAT exposure enhanced biofilm formation in aerobic bacteria, promoting aerobic degradation processes while also reducing the abundance of stress-tolerant bacteria. Additionally, PBAT altered key microbial functions related to carbon, nitrogen, and sulfur cycling. Notably, the fungal communities exhibited functional shifts, with an increase in saprotrophic fungi being beneficial for nutrient cycling, alongside a potential rise in plant pathogenic fungi. These findings underscore the multiyear ecological impacts of biodegradable plastics, suggesting microbial adaptation to plastic degradation and changes in key ecological functions, with implications for agricultural sustainability and bioremediation strategies.
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Affiliation(s)
- Xiaowei Liu
- School of Biology, Food and Environment, Hefei University, Hefei 230601, China; (X.L.); (Z.W.)
| | - Zongyu Wen
- School of Biology, Food and Environment, Hefei University, Hefei 230601, China; (X.L.); (Z.W.)
- Institute of Quality Standard and Testing Technology, BAAFS (Beijing Academy of Agriculture and Forestry Sciences), Beijing 100097, China; (W.D.); (H.R.)
| | - Wei Zhou
- College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing 400715, China;
| | - Wentao Dong
- Institute of Quality Standard and Testing Technology, BAAFS (Beijing Academy of Agriculture and Forestry Sciences), Beijing 100097, China; (W.D.); (H.R.)
| | - Huiqing Ren
- Institute of Quality Standard and Testing Technology, BAAFS (Beijing Academy of Agriculture and Forestry Sciences), Beijing 100097, China; (W.D.); (H.R.)
| | - Gang Liang
- Institute of Quality Standard and Testing Technology, BAAFS (Beijing Academy of Agriculture and Forestry Sciences), Beijing 100097, China; (W.D.); (H.R.)
| | - Wenwen Gong
- Institute of Quality Standard and Testing Technology, BAAFS (Beijing Academy of Agriculture and Forestry Sciences), Beijing 100097, China; (W.D.); (H.R.)
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20
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Tang KHD, Li R. The effects of plastisphere on the physicochemical properties of microplastics. Bioprocess Biosyst Eng 2025; 48:1-15. [PMID: 38960926 DOI: 10.1007/s00449-024-03059-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2024] [Accepted: 06/27/2024] [Indexed: 07/05/2024]
Abstract
The plastisphere is the microbial communities that grow on the surface of plastic debris, often used interchangeably with plastic biofilm or biofouled plastics. It can affect the properties of the plastic debris in multiple ways. This review aims to present the effects of the plastisphere on the physicochemical properties of microplastics systematically. It highlights that the plastisphere modifies the buoyancy and movement of microplastics by increasing their density, causing them to sink and settle out. Smaller and film microplastics are likely to settle sooner because of larger surface areas and higher rates of biofouling. Biofouled microplastics may show an oscillating movement in waterbodies when settling due to diurnal and seasonal changes in the growth of the plastisphere until they come close to the bottom of the waterbodies and are entrapped by sediments. The plastisphere enhances the adsorption of microplastics for metals and organic pollutants and shifts the adsorption mechanism from intraparticle diffusion to film diffusion. The plastisphere also increases surface roughness, reduces the pore size, and alters the overall charge of microplastics. Charge alteration is primarily attributed to changes in the functional groups on microplastic surfaces. The plastisphere introduces carbonyl, amine, amide, hydroxyl, and phosphoryl groups to microplastics, causing an increase in their surface hydrophilicity, which could alter their adsorption behaviors for heavy metals. The plastisphere may act as a reactive barrier that enhances the leaching of polar additives. It may anchor bacteria that can break down plastic additives, resulting in decreased crystallinity of microplastics. This review contributes to a better understanding of how the plastisphere alters the fate, transport, and environmental impacts of microplastics. It points to the possibility of engineering the plastisphere to improve microplastic biodegradation.
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Affiliation(s)
- Kuok Ho Daniel Tang
- Department of Environmental Science, University of Arizona, Tucson, AZ, 85721, USA.
| | - Ronghua Li
- College of Natural Resources and Environment, Northwest A&F University, Yangling, 712100, Shaanxi, China
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21
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Zheng Z, Gong Z, Zhang R, Lin X, Hong W, Song L. Potential pathogens drive ARGs enrichment during biofilms formation on environmental surfaces. ISME COMMUNICATIONS 2025; 5:ycaf057. [PMID: 40270585 PMCID: PMC12016037 DOI: 10.1093/ismeco/ycaf057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2025] [Revised: 03/28/2025] [Accepted: 03/31/2025] [Indexed: 04/25/2025]
Abstract
The enrichment of antibiotic resistance genes (ARGs) on environmental surfaces is a fundamental question in microbial ecology. Understanding the processes driving ARG variations can provide clues into their transfer mechanisms between phases and offer insights for public health management. In this study, we examined microbiota, potential pathogen, and ARG dynamics on two common environment surfaces-polyvinyl chloride (PVC) and carbon steel (CS)-under environmental stress (induced by landfill leachate flow) in a Center for Disease Control and Prevention Biofilm Reactor using metagenomics and quantitative polymerase chain reaction-Chip techniques. Contrary to the expected changes in biofilms morphology and physiochemical properties, microbiota, potential pathogens, and ARGs exhibited a divergence-convergence pattern, primarily shaped by attachment surface properties and, subsequently, biofilm maturity during biofilms formation. During this process, ARG levels in biofilms gradually increased to and exceeded the levels in the surrounding environment, but with a distinct structure (P < .05). Furthermore, 1.93- and 3.05-fold increases in the concentrations of mobile genetic elements intI-1 in PVC and CS biofilms, respectively, suggested their important role in the transfer and spread of ARGs within the biofilm matrix. Although potential pathogens were less abundant (3.48%-5.63%) in the biofilms microbiota, they accounted for 18.28%-45.16% of the ARG hosts and harbored multiple ARGs. Pathogens significantly impacted ARG enrichment (Procrustes analysis: P = .0136, M2 = 0.34) although microbiota development also influenced this process (P = .0385, M2 = 0.67). These results suggest that pathogens are key in shaping ARG enrichment in biofilms. Our findings provide dynamic insights into resistome enrichment on environmental surfaces.
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Affiliation(s)
- Zihao Zheng
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
- Anhui Shengjin Lake Wetland Ecology National Long-term Scientific Research Base, Dongzhi 247230, China
| | - Zhourui Gong
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
- Anhui Shengjin Lake Wetland Ecology National Long-term Scientific Research Base, Dongzhi 247230, China
| | - Rui Zhang
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
- Anhui Shengjin Lake Wetland Ecology National Long-term Scientific Research Base, Dongzhi 247230, China
| | - Xiaoxing Lin
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
- Anhui Shengjin Lake Wetland Ecology National Long-term Scientific Research Base, Dongzhi 247230, China
| | - Wenqing Hong
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
- Anhui Shengjin Lake Wetland Ecology National Long-term Scientific Research Base, Dongzhi 247230, China
| | - Liyan Song
- School of Resources and Environmental Engineering, Anhui University, Hefei 230601, China
- Anhui Shengjin Lake Wetland Ecology National Long-term Scientific Research Base, Dongzhi 247230, China
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22
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Chen G, Guo S, Liu L, Zhang W, Tang J. Effects of microplastics on microbial community and greenhouse gas emission in soil: A critical review. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2025; 289:117419. [PMID: 39615058 DOI: 10.1016/j.ecoenv.2024.117419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2024] [Revised: 11/09/2024] [Accepted: 11/25/2024] [Indexed: 01/26/2025]
Abstract
Microplastics (MPs) are ubiquitous in soil ecosystems and significantly impact soil microorganisms and greenhouse gas (GHG) emissions. Although some reviews have summarized their impact on greenhouse gas emissions, no systematic analysis has been conducted on how soil physicochemical and microbial properties affect these emissions. Firstly, this review details that MPs alter microbial abundance, structure, activity and gene expression, directly stimulating CO2 and N2O emissions, though their impact on CH4 remains inconclusive. Additionally, MPs change rhizosphere microbial growth, cause soil nutrient loss, and induce plant toxicity, indirectly affecting GHG emissions. Finally, this article suggests strengthening research on rhizosphere and MPs surface microbial communities, exploring interactions with clay and minerals, and investigating GHG emission mechanisms to understand the ecological effects of MPs.
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Affiliation(s)
- Guanlin Chen
- MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Saisai Guo
- MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Linan Liu
- MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Wenzhu Zhang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Jingchun Tang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria/Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China.
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23
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Rovira-Alsina L, Romans-Casas M, Perona-Vico E, Ceballos-Escalera A, Balaguer MD, Bañeras L, Puig S. Microbial Electrochemical Technologies: Sustainable Solutions for Addressing Environmental Challenges. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2024. [PMID: 39739109 DOI: 10.1007/10_2024_273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2025]
Abstract
Addressing global challenges of waste management demands innovative approaches to turn biowaste into valuable resources. This chapter explores the potential of microbial electrochemical technologies (METs) as an alternative opportunity for biowaste valorisation and resource recovery due to their potential to address limitations associated with traditional methods. METs leverage microbial-driven oxidation and reduction reactions, enabling the conversion of different feedstocks into energy or value-added products. Their versatility spans across gas, food, water and soil streams, offering multiple solutions at different technological readiness levels to advance several sustainable development goals (SDGs) set out in the 2030 Agenda. By critically examining recent studies, this chapter uncovers challenges, optimisation strategies, and future research directions for real-world MET implementations. The integration of economic perspectives with technological developments provides a comprehensive understanding of the opportunities and demands associated with METs in advancing the circular economy agenda, emphasising their pivotal role in waste minimisation, resource efficiency promotion, and closed-loop system renovation.
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Affiliation(s)
- Laura Rovira-Alsina
- LEQUiA, Institute of the Environment, University of Girona, Girona, Catalonia, Spain
| | | | - Elisabet Perona-Vico
- gEMM, Group of Molecular Microbial Ecology, Institute of Aquatic Ecology, University of Girona, Girona, Catalonia, Spain
| | | | - M Dolors Balaguer
- LEQUiA, Institute of the Environment, University of Girona, Girona, Catalonia, Spain
| | - Lluís Bañeras
- gEMM, Group of Molecular Microbial Ecology, Institute of Aquatic Ecology, University of Girona, Girona, Catalonia, Spain
| | - Sebastià Puig
- LEQUiA, Institute of the Environment, University of Girona, Girona, Catalonia, Spain.
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24
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Kusuma HS, Sabita A, Putri NA, Azliza N, Illiyanasafa N, Darmokoesoemo H, Amenaghawon AN, Kurniawan TA. Waste to wealth: Polyhydroxyalkanoates (PHA) production from food waste for a sustainable packaging paradigm. FOOD CHEMISTRY. MOLECULAR SCIENCES 2024; 9:100225. [PMID: 39497731 PMCID: PMC11532435 DOI: 10.1016/j.fochms.2024.100225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2024] [Revised: 09/16/2024] [Accepted: 10/06/2024] [Indexed: 11/07/2024]
Abstract
The growing demand for sustainable food packaging and the increasing concerns regarding environmental pollution have driven interest in biodegradable materials. This paper presents an in-depth review of the production of Polyhydroxyalkanoates (PHA), a biodegradable polymer, from food waste. PHA-based bioplastics, particularly when derived from low-cost carbon sources such as volatile fatty acids (VFAs) and waste oils, offer a promising solution for reducing plastic waste and enhancing food packaging sustainability. Through optimization of microbial fermentation processes, PHA production can achieve significant efficiency improvements, with yields reaching up to 87 % PHA content under ideal conditions. This review highlights the technical advancements in using PHA for food packaging, emphasizing its biodegradability, biocompatibility, and potential to serve as a biodegradable alternative to petroleum-based plastics. However, challenges such as high production costs, mechanical limitations, and the need for scalability remain barriers to industrial adoption. The future of PHA in food packaging hinges on overcoming these challenges through further research and innovation in production techniques, material properties, and cost reduction strategies, along with necessary legislative support to promote widespread use.
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Affiliation(s)
- Heri Septya Kusuma
- Department of Chemical Engineering, Faculty of Industrial Technology, Universitas Pembangunan Nasional “Veteran” Yogyakarta, Indonesia
| | - Atna Sabita
- Department of Chemical Engineering, Faculty of Industrial Technology, Universitas Pembangunan Nasional “Veteran” Yogyakarta, Indonesia
| | - Najla Anira Putri
- Department of Chemical Engineering, Faculty of Industrial Technology, Universitas Pembangunan Nasional “Veteran” Yogyakarta, Indonesia
| | - Nadhira Azliza
- Department of Chemical Engineering, Faculty of Industrial Technology, Universitas Pembangunan Nasional “Veteran” Yogyakarta, Indonesia
| | - Nafisa Illiyanasafa
- Department of Chemical Engineering, Faculty of Industrial Technology, Universitas Pembangunan Nasional “Veteran” Yogyakarta, Indonesia
| | - Handoko Darmokoesoemo
- Department of Chemistry, Faculty of Science and Technology, Airlangga University, Mulyorejo, Surabaya 60115, Indonesia
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25
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Li Z, Yuan D. Metagenomic Analysis Reveals the Effects of Microplastics on Antibiotic Resistance Genes in Sludge Anaerobic Digestion. TOXICS 2024; 12:920. [PMID: 39771135 PMCID: PMC11728465 DOI: 10.3390/toxics12120920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2024] [Revised: 12/16/2024] [Accepted: 12/17/2024] [Indexed: 01/04/2025]
Abstract
Sewage sludge is recognized as both a source and a reservoir for antibiotic resistance genes (ARGs). Within an anaerobic digestion (AD) system, the presence of microplastics (MPs) has been observed to potentially facilitate the proliferation of these ARGs. Understanding the influence of MPs on microbial behavior and horizontal gene transfer (HGT) within the AD system is crucial for effectively managing the dissemination of ARGs in the environment. This study utilized metagenomic approaches to analyze the dynamics of various types of ARGs and potential microbial mechanisms under exposure to MPs during the AD process. The findings indicated that MPs in the AD process can enhance the proliferation of ARGs, with the extent of this enhancement increasing with the dosage of MPs: polyethylene (PE), polyethylene terephthalate (PET), and polylactic acid (PLA) MPs increased the abundance of ARGs in the anaerobic digestion system by up to 29.90%, 18.64%, and 14.15%, respectively. Additionally, the presence of MPs increased the relative abundance of mobile genetic elements (MGEs) during the AD process. Network correlation analysis further revealed that plasmids represent the predominant category of MGEs involved in the HGT of ARGs. Propionibacterium and Alicycliphilus were identified as the primary potential hosts for these ARGs. The results of gene function annotation indicated that exposure to MPs led to an increased the relative abundance of genes related to the production of reactive oxygen species (ROS), alterations in membrane permeability, ATP synthesis, and the secretion of extracellular polymeric substances (EPS). These genes play crucial roles in influencing the HGT of ARGs.
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Affiliation(s)
| | - Donghai Yuan
- School of Environment and Energy Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China;
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26
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Li S, Xu S, Zhang L, Li Y, Dong M, Miao N, Ma H, Li J, Wei Y. Demonstrating the key role of Bacillus in poly lactic acid film degradation through statistical analysis and strain screening. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 363:125229. [PMID: 39489321 DOI: 10.1016/j.envpol.2024.125229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 07/12/2024] [Accepted: 10/30/2024] [Indexed: 11/05/2024]
Abstract
Plastic films are extensively utilized in agriculture, construction, and manufacturing, with their annual production reaching staggering figures. Addressing the global plastic pollution crisis is imperative. One promising approach is the augmentation of plastic films degradation through microbial agents. Consequently, we undertook composting experiments employing various plastics, including Polyethylene (PE), Poly lactic acid (PLA), and a treatment without plastic films addition (CK), mixed with kitchen waste. Employing bipartite association networks and difference significance analysis methods, we scrutinized the impact of different plastics on the microbial community within the compost piles. There were significant disparities in the microbial community composition among three composting piles. To pinpoint the key microorganisms responsible for PLA degradation, we conducted a comparative analysis of microbial species present on PLA compost piles and PLA film surfaces (PLAS), utilizing variance analysis, co-occurrence network analysis, and Spearman's correlation analysis. Our findings identified Bacillus as the pivotal microorganism involved in PLA degradation. Furthermore, employing function prediction by PICRUSt 2, we identified K00016 as the crucial gene facilitating PLA degradation by Bacillus. Subsequently, employing strain screening techniques, we isolated a highly effective PLA-degrading bacterium, Bacillus amyloliquefaciens strain ML274. The PLA films degradation rate of ML274 reached 3.18%. and other strains was lower than 3.0%. Thus, Bacillus emerges as the primary microorganism driving PLA degradation, emphasizing the significance of focusing on Bacillus genus microorganisms in the development of plastic-degrading bacterial agents for future endeavors.
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Affiliation(s)
- Shuxin Li
- School of Environmental Science & Engineering, Tianjin University, Tianjin, 300350, China
| | - Shaoqi Xu
- College of Resources and Environmental Science, China Agricultural University, Beijing, 100193, China
| | - Liping Zhang
- College of Resources and Environmental Science, China Agricultural University, Beijing, 100193, China; Organic Recycling Research Institute (Suzhou) of China Agricultural University, Suzhou, 215100, China
| | - Yangyang Li
- Jiaxing Green Energy Environmental Protection Technology Co., Ltd, Jiaxing, 314000, China
| | - Mengyao Dong
- College of Resources and Environmental Science, China Agricultural University, Beijing, 100193, China
| | - Nannan Miao
- College of Resources and Environmental Science, China Agricultural University, Beijing, 100193, China
| | - Hongting Ma
- School of Environmental Science & Engineering, Tianjin University, Tianjin, 300350, China
| | - Ji Li
- College of Resources and Environmental Science, China Agricultural University, Beijing, 100193, China; Organic Recycling Research Institute (Suzhou) of China Agricultural University, Suzhou, 215100, China
| | - Yuquan Wei
- College of Resources and Environmental Science, China Agricultural University, Beijing, 100193, China; Organic Recycling Research Institute (Suzhou) of China Agricultural University, Suzhou, 215100, China.
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27
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Zhu N, Yu Q, Tang L, Xie R, Hua L, Wang J, Xing J, Pan X, Rene ER, Wang Y. Aggravation of Cd availability in the plastisphere of paddy soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 955:176948. [PMID: 39414048 DOI: 10.1016/j.scitotenv.2024.176948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/11/2024] [Revised: 10/06/2024] [Accepted: 10/13/2024] [Indexed: 10/18/2024]
Abstract
Soil plastisphere has attracted many concerns, however, its influence on cadmium (Cd) availability in paddy soil was still unclear. This study carried out batch microcosmic and bagging experiments to explore the influence of microplastic (MPs) on Cd availability in paddy soil under flooding conditions in the view of plastisphere. Results showed that the presence of MPs could act as plastisphere micro-environment. The bacterial community composition changed dramatically around the plastisphere compared with MPs-contaminated bulk soil and control soil. The relative abundance of Symbiobacteraceae, Rhodocyclaceae and Bryobacteraceae was improved in the plastisphere which contributed to the enhanced the reduction of Fe(III) and sulfate in flooding paddy soil. The higher content of Fe(II) and S content contributed to the enrichment of Cd in the plastisphere which aggravated Cd availability in paddy soil under flooding conditions. The partial least squares structure equation modeling results confirmed the presence of MPs in paddy soil could act as plastisphere which could change the bacterial community composition and improve the content Fe and S that was conductive to gather Cd in plastisphere. This study shed lights on the understanding of the role of plastisphere on Cd availability in paddy field ecosystem under flooding conditions.
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Affiliation(s)
- Ningyuan Zhu
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China.
| | - Quanbo Yu
- Shanghai Engineering Research Center of Challenging Urban Sites, Shanghai Academy of Landscape Architecture Science and Planning, Shanghai 200232, China
| | - Li Tang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Rongxin Xie
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Li Hua
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Jing Wang
- Robert R. McCormick School of Engineering and Applied Science, Northwestern University, 633 Clark Street, Evanston, IL 60208, United States.
| | - Jun Xing
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Xia Pan
- College of Optoelectronic Manufacturing, Zhejiang Industry & Trade Vocational College, Wenzhou 325003, China
| | - Eldon R Rene
- Department of Water Supply, Sanitation and Environmental Engineering, IHE Delft Institute for Water Education, Westvest 7, 2611AX Delft, the Netherlands.
| | - Yimin Wang
- Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China.
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Zhao Z, Wang Y, Wei Y, Peng G, Wei T, He J, Li R, Wang Y. Distinctive patterns of bacterial community succession in the riverine micro-plastisphere in view of biofilm development and ecological niches. JOURNAL OF HAZARDOUS MATERIALS 2024; 480:135974. [PMID: 39341189 DOI: 10.1016/j.jhazmat.2024.135974] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2024] [Revised: 09/20/2024] [Accepted: 09/25/2024] [Indexed: 09/30/2024]
Abstract
Exploring plastic bacterial community succession is a crucial step in analyzing and predicting the ecological assembly processes of the plastisphere and its associated environmental impacts. However, microbial biofilm development and niche differentiation during plastic bacterial community succession have rarely scarcely considered. Here, we assessed the differences between three microplastics (MPs) and two natural polymers in terms of biofilm development and niche properties during bacterial community succession, and identified a genus of MPs-degrading bacteria with strong competitive potential in the plastisphere. MPs biofilm development exhibits secondary succession characteristics, whereas natural polymer biofilms persist during the primary succession stage. During succession in plastic bacterial communities, the relationship between nutrient resources and microbial competition was reflected in a positive correlation between species competition and niche breadth, which contradicted the common belief that increased nutrient availability leads to reduced competition. Furthermore, the co-occurrence network revealed that specialists were species with greater competitive potential within the plastisphere. Additionally, the MPs-degrading Exiguobacterium genus represented a key taxon in the plastisphere. Our study provides a reliable pathway for revealing the specificity of plastic bacterial community succession from multiple perspectives and enhances the understanding of ecological assembly processes in the plastisphere.
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Affiliation(s)
- Zhen Zhao
- College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China
| | - Yijin Wang
- College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China
| | - Yihua Wei
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
| | - Gen Peng
- College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China
| | - Tingyu Wei
- School of Resources, Environment and Materials, Guangxi University, Nanning 530004, China
| | - Jianqiao He
- Institute of Green and Low Carbon Technology, Guangxi Institute of Industrial Technology, Nanning 530004, China
| | - Ruilong Li
- College of Light Industry and Food Engineering, Guangxi University, Nanning 530004, China.
| | - Yinghui Wang
- Institute of Green and Low Carbon Technology, Guangxi Institute of Industrial Technology, Nanning 530004, China.
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Guo W, Li J, Wu Z, Chi G, Lu C, Ma J, Hu Y, Zhu B, Yang M, Chen X, Liu H. Biodegradable and conventional mulches inhibit nitrogen fixation by peanut root nodules - potentially related to microplastics in the soil. JOURNAL OF HAZARDOUS MATERIALS 2024; 480:136423. [PMID: 39536342 DOI: 10.1016/j.jhazmat.2024.136423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/05/2024] [Revised: 10/29/2024] [Accepted: 11/05/2024] [Indexed: 11/16/2024]
Abstract
Mulching has been demonstrated to improve the soil environment and promote plant growth. However, the effects of mulching and mulch-derived microplastics (MPs) on nitrogen fixation by root nodules remain unclear. In this study, we investigated the effects of polyethylene (PE) and polylactic acid-polybutylene adipate-co-terephthalate (PLA-PBAT) film mulching on nitrogen fixation by root nodules after 4 years of continuous mulching using 15N tracer technology. Additionally, we examined the relationship between nitrogen fixation and MPs. We found a reduction in the proportion of nitrogen fixation by nodules (54.3 %-58.7 %) due to mulching. This decrease may be attributed to reduced dinitrogenase activity and flavonoid content at the seedling stage caused by mulching, and mulching with PLA-PBAT films significantly decreased the abundance of Bradyrhizobium at maturity. Furthermore, combined analysis of nitrogen-fixing bacteria (nifH) and metabolomes indicated that N-lauroylethanolamine may act as a regulatory signal influencing the root nodule nitrogen fixation process and that mulching resulted in significant changes in its content. The mantel test and PLS-PM suggest that microplastic from mulching may harm root nodule nitrogen fixation. This study reveals the influence of mulching on plant nitrogen uptake and the potential threat of mulch-derived microplastics, with a special focus on root nodule nitrogen fixation.
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Affiliation(s)
- Wei Guo
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jizhi Li
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhengfeng Wu
- Shandong Peanut Research Institute, Qingdao266100, China
| | - Guangyu Chi
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Caiyan Lu
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Jian Ma
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Yanyu Hu
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
| | - Bin Zhu
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Miaoyin Yang
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xin Chen
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China.
| | - Huiying Liu
- Liaoning Academy of Agricultural Sciences, Shenyang 110161, China.
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Wang F, Hu Z, Wang W, Wang J, Xiao Y, Shi J, Wang C, Mai W, Li G, An T. Selective enrichment of high-risk antibiotic resistance genes and priority pathogens in freshwater plastisphere: Unique role of biodegradable microplastics. JOURNAL OF HAZARDOUS MATERIALS 2024; 480:135901. [PMID: 39305601 DOI: 10.1016/j.jhazmat.2024.135901] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2024] [Revised: 08/30/2024] [Accepted: 09/17/2024] [Indexed: 12/01/2024]
Abstract
Microplastics (MPs) has been concerned as emerging vectors for spreading antibiotic resistance and pathogenicity in aquatic environments, but the role of biodegradable MPs remains largely unknown. Herein, field in-situ incubation method combined with metagenomic sequencing were employed to reveal the dispersal characteristics of microbial community, antibiotic resistance genes (ARGs), mobile genetic elements (MGEs), and virulence factors (VFs) enriched by MPs biofilms. Results showed that planktonic microbes were more prone to enrich on biodegradable MPs (i.e., polyhydroxyalkanoate and polylactic acid) than non-biodegradable MPs (i.e., polystyrene, polypropylene and polyethylene). Distinctive microbial communities were assembled on biodegradable MPs, and the abundances of ARGs, MGEs, and VFs on biofilms of biodegradable MPs were much higher than that of non-biodegradable MPs. Notably, network analysis showed that the biodegradable MPs selectively enriched pathogens carrying ARGs, VFs and MGEs concurrently, suggesting a strong potential risks of co-spreading antibiotic resistance and pathogenicity through horizontal gene transfer. According to WHO priority list of Antibiotic Resistant Pathogens (ARPs) and ARGs health risk assessment framework, the highest abundances of Priority 1 ARPs and Rank I risk ARGs were found on polylactic acid and polyhydroxyalkanoate, respectively. These findings elucidate the unique and critical role of biodegradable MPs for selective enrichment of high-risk ARGs and priority pathogens in freshwater environments.
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Affiliation(s)
- Fan Wang
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China; Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, Key Laboratory of City Cluster Environmental Safety and Green development, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Zhixun Hu
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China; Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, Key Laboratory of City Cluster Environmental Safety and Green development, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China; Shenzhen Water Group Co., Ltd., Shenzhen 518031, China
| | - Wanjun Wang
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China; Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, Key Laboratory of City Cluster Environmental Safety and Green development, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
| | - Jiaxin Wang
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China; Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, Key Laboratory of City Cluster Environmental Safety and Green development, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Yongyin Xiao
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China; Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, Key Laboratory of City Cluster Environmental Safety and Green development, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Jialin Shi
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China; Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, Key Laboratory of City Cluster Environmental Safety and Green development, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Chao Wang
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China; Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, Key Laboratory of City Cluster Environmental Safety and Green development, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Weicong Mai
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China; Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, Key Laboratory of City Cluster Environmental Safety and Green development, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Guiying Li
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China; Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, Key Laboratory of City Cluster Environmental Safety and Green development, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Taicheng An
- Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control, Guangdong-Hong Kong-Macao Joint Laboratory for Contaminants Exposure and Health, Institute of Environmental Health and Pollution Control, Guangdong University of Technology, Guangzhou 510006, China; Guangzhou Key Laboratory Environmental Catalysis and Pollution Control, Key Laboratory of City Cluster Environmental Safety and Green development, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
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Xia Y, Wang S, Zhang X, Fu F, Deng H, Zhao Y, Yu H, Ge C. Deciphering how endogenous mangrove litterfall influences organic matters transformation driven by microbes in sediment with exogenous microplastics inputs. JOURNAL OF HAZARDOUS MATERIALS 2024; 480:135763. [PMID: 39270589 DOI: 10.1016/j.jhazmat.2024.135763] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2024] [Revised: 08/03/2024] [Accepted: 09/04/2024] [Indexed: 09/15/2024]
Abstract
The effects of endogenous mangrove litterfall (MF) inputs on organic matter transformation in sediment polluted by exogenous microplastics (MPs) were investigated in this work, and their linkage with microbial characteristics was also explored. MF inputs significantly affected organic carbon transformation in MPs-polluted sediment by improving humification, enzymatic activities and carbon utilisation capacity of microbes. Such effects were mainly linked with the enrichment of microbes responsible for organic substance decomposition induced by MF inputs. Indeed, MF addition increased the relative abundance of fermentation- and cellulysis-assoicated bacteria, together with Saprotrophic fungi. Moreover, dissolved matters derived from MF played a non-neglected role in regulating organic carbon transformation in MPs-polluted sediment. Besides, MF addition decreased the complexity of bacterial community network in MPs-polluted sediment but fungal community network became complicated. And the complexity of microbial network was MF amount-dependent. Even though stochastic process was dominated in sediment with or without MF, MF inputs enhanced the relative contribution of determinism and reduced the migration of microbial communities. A strong response of sediment microbes to MF affected sedimentary organic matters transformation driven by microbes. This work uncovered linkages between organic carbon transformation and microbes in sediment with endogenous litterfall and exogenous MPs inputs in mangroves.
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Affiliation(s)
- Yu Xia
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, School of Environmental Science and Engineering, Hainan University, Haikou 570228, China.
| | - Shu Wang
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, School of Environmental Science and Engineering, Hainan University, Haikou 570228, China.
| | - Xinran Zhang
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, School of Environmental Science and Engineering, Hainan University, Haikou 570228, China.
| | - Faying Fu
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, School of Environmental Science and Engineering, Hainan University, Haikou 570228, China.
| | - Hui Deng
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, School of Environmental Science and Engineering, Hainan University, Haikou 570228, China; Key Laboratory of Environmental Toxicology, Hainan University, Haikou 570228, China.
| | - Yuanyuan Zhao
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, School of Environmental Science and Engineering, Hainan University, Haikou 570228, China.
| | - Huamei Yu
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, School of Environmental Science and Engineering, Hainan University, Haikou 570228, China.
| | - Chengjun Ge
- Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, School of Environmental Science and Engineering, Hainan University, Haikou 570228, China; Key Laboratory of Environmental Toxicology, Hainan University, Haikou 570228, China.
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32
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Li M, Xu X, Wang J, Deng L, Wu Z, Yang D, Qian X, Fan Y. Complex microplastics significantly influence the assembly process of lake bacterial communities. JOURNAL OF HAZARDOUS MATERIALS 2024; 480:135867. [PMID: 39298943 DOI: 10.1016/j.jhazmat.2024.135867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2024] [Revised: 09/09/2024] [Accepted: 09/15/2024] [Indexed: 09/22/2024]
Abstract
Environmental microplastics (MPs) vary in abundance, shape, size, color, and polymer type in freshwater ecosystems, yet their impact on bacterial community assembly in natural lakes is unclear. Here, we examined MPs and bacterial compositions in water and sediments of Taihu Lake, China, to reveal the influence of complex MPs on the bacterial community assembly. The results showed that the complexity index of MPs significantly influenced the turnover and nestedness components of bacterial communities. In the colder season, MP complexity was significantly correlated with the turnover componentin sediments (R2 = 0.19, P < 0.0001), with turnover increasing as MP complexity increased. Conversely, under warmer season, MP complexity was significantly correlated with turnover and nestedness components. Additionally, the interaction effect of environmental and MP factors affected almost all components of beta diversity, particularly in cold water and sediment, with impacts on nestedness of 0.17 and 0.12, respectively, and should thus not be ignored. Our findings indicate for the first time that complex MPs significantly influence the assembly of bacterial communities in lake systems. The impact varies across seasons and future warming may exacerbate this effect, rendering it more uncertain and complex.
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Affiliation(s)
- Mingjia Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China
| | - Xiaohan Xu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China
| | - Jianjun Wang
- State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China
| | - Ligang Deng
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China
| | - Zeqiang Wu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China
| | - Daojun Yang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China
| | - Xin Qian
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China; Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology (CICAEET), Nanjing University of Information Science & Technology, Nanjing 210044, China.
| | - Yifan Fan
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, China.
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Bai X, Li K, Xu L, Zhang G, Zhang M, Huang Y. Direct evidence for selective microbial enrichment with plastic degradation potential in the plastisphere. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 954:176576. [PMID: 39343400 DOI: 10.1016/j.scitotenv.2024.176576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2024] [Revised: 09/11/2024] [Accepted: 09/26/2024] [Indexed: 10/01/2024]
Abstract
Plastisphere, characterized by microbial colonization on plastic debris, has attracted concern with its adverse environmental effects. The microbial features have been increasingly investigated; however, there lacks direct evidence for microplastics serving as carbon sources and enriching plastic-degrading microorganisms. Here, we obtained microbial communities from soil microplastics, analyzed the dissimilarity compared with soil, and characterized the plastic-degrading potential of isolates from plastisphere. Results showed the plastisphere communities significantly differed from soil communities and exhibited a higher relative abundance of Nocardia and Rhodococcus. To verify the selective enrichment of plastic-degrading microorganisms in the plastisphere, culture-based strategies were employed to evaluate the polyethylene (PE) degradation potential of two isolates Nocardia asteroides No.11 and Rhodococcus hoagii No.17. They could grow solely on PE and led to significant weight loss. FTIR and SEM analysis revealed the formation of new functional groups and the destruction of structural integrity on PE surfaces. Genes related to PE biodegradation were identified by genome-wide sequencing thus recognizing relevant enzymes and elucidating potential pathways. Overall, this report combined culture-free and culture-based approaches to confirm the plastic degradation potential of selectively enriched microorganisms in soil plastisphere, providing a positive perspective toward promoting microplastic biodegradation in farmland soil by enhancing natural microbial processes.
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Affiliation(s)
- Xinyi Bai
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Kang Li
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Libo Xu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Guangbao Zhang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China
| | - Mengjun Zhang
- Peking University Shenzhen Institute, Shenzhen, Guangdong 518057, China; PKU-HKUST Shenzhen-Hongkong Institution, Shenzhen, Guangdong 518057, China.
| | - Yi Huang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing 100871, China; Peking University Shenzhen Institute, Shenzhen, Guangdong 518057, China.
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Liu Y, Cai H, Wen Y, Song X, Wang X, Zhang Z. Research progress on degradation of biodegradable micro-nano plastics and its toxic effect mechanism on soil ecosystem. ENVIRONMENTAL RESEARCH 2024; 262:119979. [PMID: 39270956 DOI: 10.1016/j.envres.2024.119979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2024] [Revised: 08/08/2024] [Accepted: 09/10/2024] [Indexed: 09/15/2024]
Abstract
Biodegradable plastics (BPs) are known to decompose into micro-nano plastics (BMNPs) more readily than conventional plastics (CPs). Given the environmental risks posed by BMNPs in soil ecosystems, their impact has garnered increasing attention. However, research focusing on the toxic effects of BMNPs on soils remains relatively limited. The degradation process and duration of BMNPs in soil are influenced by numerous factors, which directly impact the toxic effects of BMNPs. This highlights the urgent need for further research. In this context, this review delineates the classification of BPs, investigates the degradation processes of BPs along with their influencing factors, summarizes the toxic effects on soil ecosystems, and explores the potential mechanisms that underlie these toxic effects. Finally, it provides an outlook on related research concerning BMNPs in soil. The results indicate that specific BMNPs release additives at a faster rate during decomposition, degradation, and aging, with certain compounds exhibiting increased bioavailability. Importantly, a substantial body of research has shown that BMNPs generally manifest more pronounced toxic effects in comparison to conventional micro-nano plastics (CMNPs). The toxic effects associated with BMNPs encompass a decline in soil quality and microbial biomass, disruption of nutrient cycling, inhibition of plant root growth, and negative impacts on invertebrate reproduction, survival, and fertilization rates. The rough and complex surfaces of BMNPs contribute to increased mechanical damage to tested organisms, enhance absorption by microorganisms, and disrupt normal physiological functions. Notably, the toxic effects of BMNPs on soil ecosystems are influenced by factors including concentration, type of BMNPs, exposure conditions, degradation products, and the nature of additives used. Therefore, it is crucial to standardize detection technologies and toxicity testing conditions for BMNPs. In conclusion, this review provides scientific evidence that supports effective prevention and management of BMNP pollution, assessment of its ecological risks, and governance of BMNPs-related products.
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Affiliation(s)
- Yuqing Liu
- Key Laboratory of Regional Environment and Eco-restoration, Ministry of Education, Shenyang University, Shenyang, 110044, China
| | - Haoxuan Cai
- Key Laboratory of Regional Environment and Eco-restoration, Ministry of Education, Shenyang University, Shenyang, 110044, China
| | - Yujuan Wen
- Key Laboratory of Regional Environment and Eco-restoration, Ministry of Education, Shenyang University, Shenyang, 110044, China; Northeast Geological S&T Innovation Center of China Geological Survey, Shenyang, 110000, China; Key Laboratory of Black Soil Evolution and Ecological Effect, Ministry of Natural Resources, Shenyang, 110000, China.
| | - Xiaoming Song
- Key Laboratory of Regional Environment and Eco-restoration, Ministry of Education, Shenyang University, Shenyang, 110044, China
| | - Xiaochu Wang
- Key Laboratory of Regional Environment and Eco-restoration, Ministry of Education, Shenyang University, Shenyang, 110044, China
| | - Zhipeng Zhang
- Sichuan Geological Environment Survey and Research Center, Sichuan, 610000, China
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Fei JC, Pang CY, Jiang P, Zou T, Geng MJ, Peng JW, Mai L, Luo GW, Zhu D, Tang CJ. Wet-dry or freeze-thaw alternation can regulate the impacts of farmland plastic pollution on soil bacterial communities and functions. WATER RESEARCH 2024; 267:122506. [PMID: 39340862 DOI: 10.1016/j.watres.2024.122506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2024] [Revised: 09/07/2024] [Accepted: 09/22/2024] [Indexed: 09/30/2024]
Abstract
The persistence of farmland plastic pollution has raised significant concerns regarding its potential long-term impacts on soil health in the context of global climate change. However, there are still gaps in the understanding of the impacts of plastic residues on soil microbial communities and functions in agricultural environments under unstable and extreme climatic conditions. In this study, the effects of plastic residues (two types and three shapes) on farmland soil bacterial communities and functions across varying environmental conditions were investigated through microscopic experiments. The results revealed that plastic residues subjected to wet-dry or freeze-thaw alternations exhibited greater degradation compared to those under natural conditions. The effects of plastic residue types and shapes on soil bacterial diversity and function were regulated by environmental factors. The plastic residues significantly reduced the stability of the bacterial network under natural condition (P < 0.05), whereas the opposite phenomenon was observed under wet-dry or freeze-thaw alternating conditions. Compared to under natural condition, lower numbers of bacterial functional pathways exhibiting significant differences due to plastic residues were observed under wet-dry or freeze-thaw alternating conditions. Significant associations were observed between soil bacterial communities and functions and various soil physicochemical properties under natural conditions (P < 0.05), and most of these associations were attenuated in the wet-dry or freeze-thaw alternations. This study demonstrated the potential impacts of plastic pollution on farmland soil microbiomes, which could be modulated by both residue characteristics and climatic conditions. Specifically, extreme environments could mitigate plastic-pollution-driven influences on soil microbiomes.
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Affiliation(s)
- Jiang-Chi Fei
- College of Resources, Hunan Agricultural University, Changsha, 410128, China; National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Changsha, 410128, China; Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Changsha, 410128, China
| | - Chun-Yu Pang
- College of Resources, Hunan Agricultural University, Changsha, 410128, China
| | - Pan Jiang
- College of Resources, Hunan Agricultural University, Changsha, 410128, China
| | - Tao Zou
- College of Resources, Hunan Agricultural University, Changsha, 410128, China
| | - Meng-Jiao Geng
- College of Resources, Hunan Agricultural University, Changsha, 410128, China
| | - Jian-Wei Peng
- College of Resources, Hunan Agricultural University, Changsha, 410128, China; National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Changsha, 410128, China; Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Changsha, 410128, China
| | - Lei Mai
- Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou 511443, China
| | - Gong-Wen Luo
- College of Resources, Hunan Agricultural University, Changsha, 410128, China; National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Changsha, 410128, China; Hunan Provincial Key Laboratory of Farmland Pollution Control and Agricultural Resources Use, Changsha, 410128, China.
| | - Dong Zhu
- Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Chong-Jian Tang
- School of Metallurgy and Environment, Central South University, Changsha, 410083, China
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Wei W, Ma M, Jiang X, Meng F, Cao F, Chen H, Guan D, Li L, Li J. Soil P-stimulating bacterial communities: response and effect assessment of long-term fertilizer and rhizobium inoculant application. ENVIRONMENTAL MICROBIOME 2024; 19:86. [PMID: 39511696 PMCID: PMC11545948 DOI: 10.1186/s40793-024-00633-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2024] [Accepted: 10/29/2024] [Indexed: 11/15/2024]
Abstract
BACKGROUND Phosphorus (P) plays a vital role in plant growth. The pqqC and phoD genes serve as molecular markers for inorganic and organic P breakdown, respectively. However, the understanding of how P-mobilizing bacteria in soil respond to long-term fertilization and rhizobium application is limited. Herein, soil that had been treated with fertilizer and rhizobium for 10 years was collected to investigate the characteristics of P-mobilizing bacterial communities. Five treatments were included: no fertilization (CK), phosphorus fertilizer (P), urea + potassium fertilizer (NK), NPK, and PK + Bradyrhizobium japonicum 5821 (PK + R). RESULTS The soybean nodule dry weight was highest in the P treatment (1.93 g), while the soybean yield peaked in the PK + R treatment (3025.33 kg ha- 1). The abundance of the pqqC gene increased in the rhizosphere soil at the flowering-podding stage and in the bulk soil at the maturity stage under the P treatment, while its abundance increased in the bulk soil at the flowering-podding stage and in the rhizosphere soil at the maturity stage under the PK + R treatment. The abundance of the phoD gene was enhanced in the bulk soil at the flowering-podding stage under the PK + R treatment. The Shannon and Ace indexes of pqqC- and phoD-harboring bacteria were higher in the rhizosphere soil at maturity under the PK + R treatment compared to other treatments. Furthermore, a comprehensive analysis of the neutral community model and co-occurrence pattern demonstrated that the application of P fertilizer alone led to an increase in the distribution and dynamic movement of pqqC-harboring bacteria, but resulted in a decrease in complexity of network structure. On the other hand, rhizobium inoculation enhanced the distribution and dynamic movement of phoD-harboring bacteria, as well as the stability and complexity of the network structure. Pseudomonas and Nitrobacter, as well as Steptomyces, Stella, and Nonomuraea, may be crucial genera regulating the composition and function of pqqC- and phoD-harboring communities, respectively. CONCLUSIONS These findings affirm the crucial role of fertilization and rhizobium inoculation in regulating pqqC- and phoD-harboring bacterial communities, and highlight the significance of long-term phosphate-only fertilization and rhizobium inoculation in enhancing dissolved inorganic phosphorus and mineralized organophosphorus, respectively.
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Affiliation(s)
- Wanling Wei
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, South Zhongguancun Street No.12, Beijing, 100081, China
| | - Mingchao Ma
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, South Zhongguancun Street No.12, Beijing, 100081, China
- Laboratory of Quality and Safety Risk Assessment for Microbial Products, Ministry of Agriculture, Beijing, 100081, China
| | - Xin Jiang
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, South Zhongguancun Street No.12, Beijing, 100081, China
- Laboratory of Quality and Safety Risk Assessment for Microbial Products, Ministry of Agriculture, Beijing, 100081, China
| | - Fangang Meng
- Soybean Research Institute, Jilin Academy of Agricultural Sciences, Jilin, 132011, China
| | - Fengming Cao
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, South Zhongguancun Street No.12, Beijing, 100081, China
- Laboratory of Quality and Safety Risk Assessment for Microbial Products, Ministry of Agriculture, Beijing, 100081, China
| | - Huijun Chen
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, South Zhongguancun Street No.12, Beijing, 100081, China
| | - Dawei Guan
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, South Zhongguancun Street No.12, Beijing, 100081, China
| | - Li Li
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, South Zhongguancun Street No.12, Beijing, 100081, China
- Laboratory of Quality and Safety Risk Assessment for Microbial Products, Ministry of Agriculture, Beijing, 100081, China
| | - Jun Li
- Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, South Zhongguancun Street No.12, Beijing, 100081, China.
- Laboratory of Quality and Safety Risk Assessment for Microbial Products, Ministry of Agriculture, Beijing, 100081, China.
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Ma X, Wei Z, Wang X, Li C, Feng X, Shan J, Yan X, Ji R. Microplastics from polyvinyl chloride agricultural plastic films do not change nitrogenous gas emission but enhance denitrification potential. JOURNAL OF HAZARDOUS MATERIALS 2024; 479:135758. [PMID: 39244981 DOI: 10.1016/j.jhazmat.2024.135758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2024] [Revised: 08/04/2024] [Accepted: 09/04/2024] [Indexed: 09/10/2024]
Abstract
The effects of microplastics (MPs) from agricultural plastic films on soil nitrogen transformation, especially denitrification, are still obscure. Here, using a robotized flow-through system, we incubated vegetable upland soil cores for 66 days with MPs from PE mulching film (F-PE) and PVC greenhouse film (F-PVC) and directly quantified the emissions of nitrogenous gases from denitrification under oxic conditions, as well as the denitrification potential under anoxic conditions. The impact of MPs on soil nitrogen transformation was largely determined by the concentration of the additive phthalate esters (PAEs) containing in the MPs. The F-PE MPs with low level of PAEs (about 0.006 %) had no significant effect on soil mineral nitrogen content and nitrogenous gas emissions under oxic conditions. In contrast, the F-PVC MPs with high levels of PAEs (about 11 %) reduced soil nitrate content under oxic conditions, probably owing to promoted microbial assimilation of nitrogen, as the emissions of denitrification products (N2, NO, and N2O) was not affected. However, the F-PVC MPs significantly enhanced the denitrification potential of the soil due to the increased abundance of denitrifiers under anoxic conditions. These findings highlight the disturbance of MPs from agricultural films, particularly the additive PAEs on nitrogen transformation in soil ecosystems.
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Affiliation(s)
- Xiaofang Ma
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China; State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - Zhijun Wei
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaomin Wang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Chenglin Li
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xueying Feng
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jun Shan
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Xiaoyuan Yan
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Rong Ji
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
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Liu X, Yu Y, Yu H, Sarkar B, Zhang Y, Yang Y, Qin S. Nonbiodegradable microplastic types determine the diversity and structure of soil microbial communities: A meta-analysis. ENVIRONMENTAL RESEARCH 2024; 260:119663. [PMID: 39043354 DOI: 10.1016/j.envres.2024.119663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2024] [Revised: 07/07/2024] [Accepted: 07/20/2024] [Indexed: 07/25/2024]
Abstract
As an emerging contaminant, microplastics (MPs) have received considerable attention for their potential threat to the soil environment. However, the response of soil bacterial and fungal communities to MPs exposure remains unclear. In this study, we conducted a global meta-analysis of 95 publications and 2317 observations to assess the effects of nonbiodegradable MP properties and exposure conditions on soil microbial biomass, alpha and beta diversity, and community structure. Our results indicate that MPs increased (p < 0.05) soil active microbial biomass by 42%, with the effect varying with MPs type, exposure concentration, exposure time and soil pH. MPs concentration was identified as the most important factor controlling the response of soil microbial biomass to MPs. MPs addition decreased (p < 0.05) the soil bacterial Shannon and Chao1 indices by 2% and 3%, respectively, but had limited effects (p > 0.05) on soil fungal Shannon and Chao1 indices. The type of MPs and exposure time determined the effects of MPs on bacterial Shannon and Chao1 indices, while the type of MPs and soil pH controlled the response ratios of fungal Shannon and Chao1 indices to MPs. Specifically, soil organic carbon (SOC) was the major factor regulating the response ratio of bacterial alpha diversity index to MPs. The presence of MPs did not affect soil bacterial community structure and beta diversity. Our results highlight that MPs reduced bacterial diversity and richness but increased the soil active microbial biomass, suggesting that MPs could disrupt biogeochemical cycles by promoting the growth of specific microorganisms.
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Affiliation(s)
- Xinhui Liu
- Hebei Provincial Key Laboratory of Soil Ecology, Hebei Provincial Key Laboratory of Agricultural Water Resources, Center for Agricultural Resources Research, Institute of Genetic and Developmental Biology, The Chinese Academy of Sciences, 286 Huaizhong Road, Shijiazhuang, 050021, Hebei, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yongxiang Yu
- Research Center for Environmental Ecology and Engineering, School of Environmental Ecology and Biological Engineering, Wuhan Institute of Technology, Wuhan, 430205, China.
| | - Haiyang Yu
- College of Resources and Environment, Anhui Agricultural University, Hefei, 230036, China
| | - Binoy Sarkar
- Future Industries Institute, University of South Australia, Mawson Lakes, SA 5095, Australia
| | - Yanyan Zhang
- College of Resources, Sichuan Agricultural University, Chengdu, 611130, China
| | - Yuyi Yang
- Hubei Key Laboratory of Wetland Evolution & Ecological Restoration, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan, 430074, China
| | - Shuping Qin
- Hebei Provincial Key Laboratory of Soil Ecology, Hebei Provincial Key Laboratory of Agricultural Water Resources, Center for Agricultural Resources Research, Institute of Genetic and Developmental Biology, The Chinese Academy of Sciences, 286 Huaizhong Road, Shijiazhuang, 050021, Hebei, China.
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Yang B, Wu L, Feng W, Lin Q. Global perspective of ecological risk of plastic pollution on soil microbial communities. Front Microbiol 2024; 15:1468592. [PMID: 39444686 PMCID: PMC11496196 DOI: 10.3389/fmicb.2024.1468592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2024] [Accepted: 09/10/2024] [Indexed: 10/25/2024] Open
Abstract
Introduction The impacts of plastic pollution on soil ecosystems have emerged as a significant global environmental concern. The progress in understanding how plastic pollution affects soil microbial communities and ecological functions is essential for addressing this issue effectively. Methods A bibliometric analysis was conducted on the literature from the Web of Science Core Collection database to offer valuable insights into the dynamics and trends in this field. Results To date, the effects of plastic residues on soil enzymatic activities, microbial biomass, respiration rate, community diversity and functions have been examined, whereas the effects of plastic pollution on soil microbes are still controversial. Discussion To include a comprehensive examination of the combined effects of plastic residue properties (Type, element composition, size and age), soil properties (soil texture, pH) at environmentally relevant concentrations with various exposure durations under field conditions in future studies is crucial for a holistic understanding of the impact of plastic pollution on soil ecosystems. Risk assessment of plastic pollution, particularly for nanoplasctics, from the perspective of soil food web and ecosystem multifunctioning is also needed. By addressing critical knowledge gaps, scholars can play a pivotal role in developing strategies to mitigate the ecological risks posed by plastic pollution on soil microorganisms.
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Affiliation(s)
- Bing Yang
- Sichuan Academy of Giant Panda, Chengdu, China
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She Y, Qi X, Li Z. Insights into soil autotrophic ammonium oxidization under microplastics stress: Crossroads of nitrification, comammox, anammox and Feammox. JOURNAL OF HAZARDOUS MATERIALS 2024; 478:135443. [PMID: 39128156 DOI: 10.1016/j.jhazmat.2024.135443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2023] [Revised: 06/30/2024] [Accepted: 08/05/2024] [Indexed: 08/13/2024]
Abstract
Microplastics (MPs) are widespread in agroecosystems and profoundly impact soil microbiome and nutrient cycling. However, the effects of MPs on soil autotrophic ammonium oxidization processes, including nitrification, complete ammonium oxidation (comammox), anaerobic ammonium oxidation (anammox), and anaerobic ammonium oxidation coupled to iron reduction (Feammox), remain unclear. These processes are the rate-limiting steps of nitrogen cycling in agroecosystems. Here, our work unveiled that exposures of polyethylene (PE), polypropylene (PP), polylactic acid (PLA), and polybutylene adipate terephthalate (PBAT) MPs significantly modulated ammonium oxidization pathways with distinct type- and dose-dependent effects. Nitrification remained the main contributor (56.4-70.7 %) to soil ammonium removal, followed by comammox (11.7-25.6 %), anammox (5.0-20.2 %) and Feammox (3.3-11.6 %). Compared with conventional nonbiodegradable MPs (i.e., PE and PP), biodegradable MPs (i.e., PLA and PBAT) exhibited more pronounced impacts on soil nutrient conditions and functional microbes, which collectively induced alterations in soil ammonium oxidation. Interestingly, low-dose PLA and PBAT remarkably enhanced the roles of anammox and Feammox in soil ammonium removal, contributing to the mitigation of soil acidification in agroecosystems. This study highlights the diverse responses of ammonium oxidization pathways to MPs, further deepening our understanding of how MPs affect biogeochemical cycling and enriching strategies for agricultural managements amid increasing MPs pollution.
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Affiliation(s)
- Yuecheng She
- State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University, Nanjing 210023, China; School of the Environment, Nanjing University, Nanjing 210023, China
| | - Xin Qi
- State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University, Nanjing 210023, China; School of the Environment, Nanjing University, Nanjing 210023, China
| | - Zhengkui Li
- State Key Laboratory of Pollution Control and Resource Reuse, Nanjing University, Nanjing 210023, China; School of the Environment, Nanjing University, Nanjing 210023, China.
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Chen Y, Cui B, Dou Y, Fan H, Fang Y, Wang L, Duan Z. Characteristics of biofilms on polylactic acid microplastics and their inhibitory effects on the growth of rice seedlings: A comparative study of petroleum-based microplastics. JOURNAL OF HAZARDOUS MATERIALS 2024; 478:135469. [PMID: 39173375 DOI: 10.1016/j.jhazmat.2024.135469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2024] [Revised: 07/05/2024] [Accepted: 08/08/2024] [Indexed: 08/24/2024]
Abstract
Increasing evidence highlights the negative effects of microplastics (MPs) on crops and bio-based plastics offer an alternative to conventional plastics. However, there is limited knowledge on the impacts and mechanisms of bio-based MPs on crop physiology. In this study, bio-based polylactic acid (PLA) and petroleum-based MPs [polyamide (PA) and polypropylene (PP)] were added to hydroponic cultures planted with rice (Oryza sativa L.) seedlings to assess their toxicity. Compared to PA and PP MPs, PLA MPs experienced greater aging after 28 days of exposure, and their surfaces were loaded with more rod-shaped microorganisms with potential plastic degradation ability, such as Proteobacteria and Bacteroidota, which competed with rice seedlings for carbon and nitrogen sources for self-multiplication, thus altering the carbon fixation and nitrogen cycling processes during rice seedling growth. Down-regulation of amino acid and lipid metabolisms in the PLA treatment inhibited the normal synthesis of chlorophyll in rice seedling leaves. Consequently, decreases in the biomass and height of rice seedling roots and shoots were observed in the PLA MP treatment. This study provides evidence that bio-based MPs may have a more severe impact on crop growth than petroleum-based MPs.
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Affiliation(s)
- Yizhuo Chen
- School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Bo Cui
- Tianjin Institute of Environment and Operational Medicine, Tianjin 300050, China
| | - Yuhang Dou
- School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Huiyu Fan
- School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China
| | - Yanjun Fang
- Tianjin Institute of Environment and Operational Medicine, Tianjin 300050, China
| | - Lei Wang
- College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Zhenghua Duan
- School of Environmental Science and Safety Engineering, Tianjin University of Technology, Tianjin 300384, China.
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Chen XL, Wu LJ, Miao LL, Li L, Qiu LM, Zhu HQ, Si XR, Li HF, Zhao QL, Qi PZ, Hou TT. Chronic polystyrene microplastics exposure-induced changes in thick-shell mussel (Mytilus coruscus) metaorganism: A holistic perspective. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 284:116961. [PMID: 39208580 DOI: 10.1016/j.ecoenv.2024.116961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2024] [Revised: 08/19/2024] [Accepted: 08/26/2024] [Indexed: 09/04/2024]
Abstract
Microplastics have emerged as a significant global concern, particularly in marine ecosystems. While extensive research has focused on the toxicological effects of microplastics on marine animals and/or their associated microorganisms as two separate entities, the holistic perspective of the adaptability and fitness of a marine animal metaorganism-comprising the animal host and its microbiome-remains largely unexplored. In this study, mussel metaorganisms subjected chronic PS-MPs exposure experienced acute mortality but rapidly adapted. We investigated the response of innate immunity, digestive enzymes and their associated microbiomes to chronic PS-MPs exposure. We found that PS-MPs directly and indirectly interacted with the host and microbe within the exposure system. The adaptation was a joint effort between the physiological adjustments of mussel host and genetic adaptation of its microbiome. The mussel hosts exhibited increased antioxidant activity, denser gill filaments and increased immune cells, enhancing their innate immunity. Concurrently, the gill microbiome and the digestive gland microbiome respective selectively enriched for plastic-degrading bacteria and particulate organic matter-utilizing bacteria, facilitating the microbiome's adaptation. The microbial adaptation to chronic PS-MPs exposure altered the ecological roles of mussel microbiome, as evidenced by alterations in microbial interactions and nutrient cycling functions. These findings provided new insights into the ecotoxicological impact of microplastics on marine organisms from a metaorganism perspective.
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Affiliation(s)
- Xing-Lu Chen
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
| | - Lin-Jun Wu
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Li-Li Miao
- State Key Laboratory of Microbial Resources, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, China
| | - Lei Li
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China; East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China
| | - Long-Mei Qiu
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
| | - Hui-Qiang Zhu
- Fishery College, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
| | - Xi-Rui Si
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
| | - Hong-Fei Li
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
| | - Qiao-Ling Zhao
- Zhoushan Institute for Food and Drug Control, Zhoushan, Zhejiang 316000, China
| | - Peng-Zhi Qi
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
| | - Ting-Ting Hou
- National Engineering Research Center of Marine Facilities Aquaculture, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China.
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Zhang L, Zhang G, Shi Z, He M, Ma D, Liu J. Effects of polypropylene micro(nano)plastics on soil bacterial and fungal community assembly in saline-alkaline wetlands. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 945:173890. [PMID: 38885717 DOI: 10.1016/j.scitotenv.2024.173890] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2024] [Revised: 05/31/2024] [Accepted: 06/08/2024] [Indexed: 06/20/2024]
Abstract
Microplastic pollution is a major environmental threat, especially to terrestrial ecosystems. To better understand the effects of microplastics on soil microbiota, the influence of micro- to nano-scale polypropylene plastics was investigated on microbial community diversity, functionality, co-occurrence, assembly, and their interaction with soil-plant using high-throughput sequencing approaches and multivariate analyses. The results showed that polypropylene micro/nano-plastics mainly reduced bacterial diversity, not fungal, and that plastic size had a stronger effect than concentration on the assembly of microbial communities. Nano-plastics decreased the complexity and connectivity of both bacterial and fungal networks compared to micro-plastics. Moreover, bacteria were more sensitive and deterministic to polypropylene micro/nano-plastic stress than fungi, as shown by their different growth rates, guanine-cytosine content, and cell structure. Interestingly, the dominant ecological process for bacteria shifted from stochastic drift to deterministic selection with polypropylene micro/nano-plastic exposure. Furthermore, nano-plastics directly or indirectly disrupted the interactions within intra-microbes and between soil-bacteria-plant by altering soil nutrients and stoichiometry (C:N:P) or plant diversity. Collectively, the results indicate that polypropylene nano-plastics pose more ecological risks to soil microbes and their plant-soil interactions. This study sheds light on the potential ecological consequences of polypropylene micro/nano-plastic pollution in terrestrial ecosystems.
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Affiliation(s)
- Lan Zhang
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, Center for Grassland Microbiome, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China
| | - Guorui Zhang
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, Center for Grassland Microbiome, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China
| | - Ziyue Shi
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, Center for Grassland Microbiome, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China
| | - Mengxuan He
- School of Geographic and Environmental Science, Tianjin Key Laboratory of Water Resources and Environment, Tianjin Normal University, Tianjin 300387, China..
| | - Dan Ma
- School of Life Sciences, Institute of Life Science and Green Development, Hebei University, Baoding, 071002, Hebei, China
| | - Jie Liu
- State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, Center for Grassland Microbiome, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China.
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Lara-Topete GO, Castanier-Rivas JD, Bahena-Osorio MF, Krause S, Larsen JR, Loge FJ, Mahlknecht J, Gradilla-Hernández MS, González-López ME. Compounding one problem with another? A look at biodegradable microplastics. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 944:173735. [PMID: 38857803 DOI: 10.1016/j.scitotenv.2024.173735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 05/29/2024] [Accepted: 06/01/2024] [Indexed: 06/12/2024]
Abstract
Environmental concerns about microplastics (MPs) have motivated research of their sources, occurrence, and fate in aquatic and soil ecosystems. To mitigate the environmental impact of MPs, biodegradable plastics are designed to naturally decompose, thus reducing the amount of environmental plastic contamination. However, the environmental fate of biodegradable plastics and the products of their incomplete biodegradation, especially micro-biodegradable plastics (MBPs), remains largely unexplored. This comprehensive review aims to assess the risks of unintended consequences associated with the introduction of biodegradable plastics into the environment, namely, whether the incomplete mineralization of biodegradable plastics could enhance the risk of MBPs formation and thus, exacerbate the problem of their environmental dispersion, representing a potentially additional environmental hazard due to their presumed ecotoxicity. Initial evidence points towards the potential for incomplete mineralization of biodegradable plastics under both controlled and uncontrolled conditions. Rapid degradation of PLA in thermophilic industrial composting contrasts with the degradation below 50 % of other biodegradables, suggesting MBPs released into the environment through compost. Moreover, degradation rates of <60 % in anaerobic digestion for polymers other than PLA and PHAs suggest a heightened risk of MBPs in digestate, risking their spread into soil and water. This could increase MBPs and adsorbed pollutants' mobilization. The exact behavior and impacts of additive leachates from faster-degrading plastics remain largely unknown. Thus, assessing the environmental fate and impacts of MBPs-laden by-products like compost or digestate is crucial. Moreover, the ecotoxicological consequences of shifting from conventional plastics to biodegradable ones are highly uncertain, as there is insufficient evidence to claim that MBPs have a milder effect on ecosystem health. Indeed, literature shows that the impact may be worse depending on the exposed species, polymer type, and the ecosystem complexity.
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Affiliation(s)
- Gary Ossmar Lara-Topete
- Escuela de Ingeniería y Ciencias, Tecnologico de Monterrey, Laboratorio de Sostenibilidad y Cambio Climático, Av. General Ramón Corona 2514, Zapopan, Jalisco 45138, Mexico
| | - Juan Daniel Castanier-Rivas
- Escuela de Ingeniería y Ciencias, Tecnologico de Monterrey, Laboratorio de Sostenibilidad y Cambio Climático, Av. General Ramón Corona 2514, Zapopan, Jalisco 45138, Mexico
| | - María Fernanda Bahena-Osorio
- Escuela de Ingeniería y Ciencias, Tecnologico de Monterrey, Laboratorio de Sostenibilidad y Cambio Climático, Av. General Ramón Corona 2514, Zapopan, Jalisco 45138, Mexico
| | - Stefan Krause
- School of Geography, Earth and Environmental Sciences, University of Birmingham, United Kingdom
| | - Joshua R Larsen
- School of Geography, Earth and Environmental Sciences, University of Birmingham, United Kingdom
| | - Frank J Loge
- Department of Civil & Environmental Engineering, University of California - Davis, Davis, CA, United States of America; Escuela de Ingeniería y Ciencias, Tecnologico de Monterrey, Campus Monterrey, Monterrey 64849, Nuevo León, Mexico
| | - Jürgen Mahlknecht
- Escuela de Ingeniería y Ciencias, Tecnologico de Monterrey, Campus Monterrey, Monterrey 64849, Nuevo León, Mexico
| | - Misael Sebastián Gradilla-Hernández
- Escuela de Ingeniería y Ciencias, Tecnologico de Monterrey, Laboratorio de Sostenibilidad y Cambio Climático, Av. General Ramón Corona 2514, Zapopan, Jalisco 45138, Mexico
| | - Martín Esteban González-López
- Escuela de Ingeniería y Ciencias, Tecnologico de Monterrey, Laboratorio de Sostenibilidad y Cambio Climático, Av. General Ramón Corona 2514, Zapopan, Jalisco 45138, Mexico.
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Yuan F, Zou X, Liao Q, Wang T, Zhang H, Xue Y, Chen H, Ding Y, Lu M, Song Y, Fu G. Insight into the bacterial community composition of the plastisphere in diverse environments of a coastal salt marsh. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2024; 357:124465. [PMID: 38942280 DOI: 10.1016/j.envpol.2024.124465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2024] [Revised: 06/11/2024] [Accepted: 06/26/2024] [Indexed: 06/30/2024]
Abstract
The microbial community colonized on microplastics (MPs), known as the 'plastisphere', has attracted extensive concern owing to its environmental implications. Coastal salt marshes, which are crucial ecological assets, are considered sinks for MPs. Despite their strong spatial heterogeneity, there is limited information on plastisphere across diverse environments in coastal salt marshes. Herein, a 1-year field experiment was conducted at three sites in the Yancheng salt marsh in China. This included two sites in the intertidal zone, bare flat (BF) and Spartina alterniflora vegetation area (SA), and one site in the supratidal zone, Phragmites australis vegetation area (PA). Petroleum-based MPs (polyethylene and expanded polystyrene) and bio-based MPs (polylactic acid and polybutylene succinate) were employed. The results revealed significant differences in bacterial community composition between the plastisphere and sediment at all three sites examined, and the species enriched in the plastisphere exhibited location-specific characteristics. Overall, the largest difference was observed at the SA site, whereas the smallest difference was observed at the BF site. Furthermore, the MP polymer types influenced the composition of the bacterial communities in the plastisphere, also exhibiting location-specific characteristics, with the most pronounced impact observed at the PA site and the least at the BF site. The polybutylene succinate plastisphere bacterial communities at the SA and PA sites were quite different from the plastispheres from the other three MP polymer types. Co-occurrence network analyses suggested that the bacterial community network in the BF plastisphere exhibited the highest complexity, whereas the network in the SA plastisphere showed relatively sparse interactions. Null model analyses underscored the predominant role of deterministic processes in shaping the assembly of plastisphere bacterial communities across all three sites, with a more pronounced influence observed in the intertidal zone than in the supratidal zone. This study enriches our understanding of the plastisphere in coastal salt marshes.
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Affiliation(s)
- Feng Yuan
- School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, 210023, China; Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing, 210023, China
| | - Xinqing Zou
- School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, 210023, China; Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing, 210023, China; Collaborative Innovation Center of South China Sea Studies, Nanjing University, Nanjing, 210023, China
| | - Qihang Liao
- School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, 210023, China; Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing, 210023, China; Collaborative Innovation Center of South China Sea Studies, Nanjing University, Nanjing, 210023, China
| | - Teng Wang
- College of Oceanography, Hohai University, Nanjing, 210098, China.
| | - Hexi Zhang
- School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, 210023, China; Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing, 210023, China
| | - Yue Xue
- School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, 210023, China; Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing, 210023, China
| | - Hongyu Chen
- School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, 210023, China; Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing, 210023, China; Collaborative Innovation Center of South China Sea Studies, Nanjing University, Nanjing, 210023, China
| | - Yongcheng Ding
- School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, 210023, China; Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing, 210023, China
| | - Ming Lu
- School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, 210023, China; Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing, 210023, China
| | - Yuyang Song
- School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, 210023, China; Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing, 210023, China
| | - Guanghe Fu
- School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing, 210023, China; Ministry of Education Key Laboratory for Coast and Island Development, Nanjing University, Nanjing, 210023, China; Collaborative Innovation Center of South China Sea Studies, Nanjing University, Nanjing, 210023, China
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Zou X, Cao K, Wang Q, Kang S, Wang Y. Enhanced degradation of polylactic acid microplastics in acidic soils: Does the application of biochar matter? JOURNAL OF HAZARDOUS MATERIALS 2024; 477:135262. [PMID: 39047572 DOI: 10.1016/j.jhazmat.2024.135262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2024] [Revised: 07/16/2024] [Accepted: 07/17/2024] [Indexed: 07/27/2024]
Abstract
Biodegradable plastics, as an alternative to petroleum plastics, are fiercely increasing, but their incomplete degradation under natural conditions may lead to the breakdown into microplastics (MPs). Here, we explored the impacts of chicken manure-derived (MBC) and wood waste-derived biochar (WBC) on the degradation of polylactic acid microplastics (PLA-MPs) during soil incubation for one year. Both biochars induced more pronounced degradation characteristics in PLA-MPs, including enhanced surface roughness, the proportion of MPs < 100 µm by 12.89 %-25.67 %, oxygen loading and O/C ratio to 71.74 %-75.87 % and 1.70-1.76, as well as accelerated carbon loss and the cleavage of ester group and C-C bond. Also, biochar increased soil pH, depleted inorganic nitrogen and available phosphorus, and changed enzymic activity in PLA-MP-polluted soils. We proposed that both biochars accelerated the PLA-MP degradation by inducing alkaline, aminolysis/ammonolysis, oxidative, and microbial degradation. Among these, MBC induced aminolysis/ammonolysis by NH4+ via Fe2+-driven NO3-/NO2- reduction and microbial nitrogen fixation, and oxidative degradation by radicals generated through Fenton/Fenton-like reaction. WBC caused aminolysis/ammonolysis and oxidative degradation mainly through dissimilatory nitrate reduction to ammonium and surface free radicals on biochar. These findings indicate that biochar has the potential to accelerate PLA-MP degradation, and its regulatory mechanism depends on the type of biochar.
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Affiliation(s)
- Xiaoyan Zou
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control, CAS Haixi Industrial Technology Innovation Center in Beilun, Ningbo 315830, China.
| | - Kaibo Cao
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Qiang Wang
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; College of Environment & Safety Engineering, Fuzhou University, Fuzhou 350108, China
| | - Shilei Kang
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Yin Wang
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control, CAS Haixi Industrial Technology Innovation Center in Beilun, Ningbo 315830, China
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Zhang C, Liu X, Zhang L, Chen Q, Xu Q. Assessing the aging and environmental implications of polyethylene mulch films in agricultural land. ENVIRONMENTAL SCIENCE. PROCESSES & IMPACTS 2024; 26:1310-1321. [PMID: 38818727 DOI: 10.1039/d4em00102h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2024]
Abstract
Polyethylene mulch films (MFs) are widely employed in agricultural land to enhance crop yield and quality, but the MF residue causes significant environmental concerns. To promote the sustainable application of MFs, it is essential to assess their fate throughout their service life and understand the underlying degradation mechanisms. In this study, surface-exposed and soil-buried MFs were separately collected from agricultural land in Inner Mongolia, China. The variations in aging performance and corresponding property alterations of MF were thoroughly examined. The results indicated that sunlight exposure considerably hastens MF degradation, whereas buried MFs experience a more moderate aging process due to the inhibitory effects of the dark and anaerobic environment on oxidation. Surface cracking was observed in MF-Light samples as a result of photodegradation, while chemical and moisture interactions with soil caused partial perforation in MF-Soil samples. Relative to the pristine MF, the oxidation, unsaturation, and hydroxylation levels of MF-Light increased to 0.88, 0.35, and 0.73, respectively, with corresponding values for MF-Soil at 0.44, 0.13, and 0.24. The generated oxygen-containing functional groups lead to a decrease in contact angles of MF-Light and MF-Soil, enhancing their hydrophilicity. The aging process of MFs led to a decline in mechanical properties, posing challenges for recycling. Moreover, nearly all phthalate esters (PAEs) were released from MFs, regardless of sunlight exposure or soil burial. The use of MFs also impacted the abundance of soil microbial communities. Specifically, the selected polyethylene MF enriched Actinobacteriota by 75%, while reducing Chloroflexi and Firmicutes by 27% and 45%, respectively.
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Affiliation(s)
- Chao Zhang
- Shenzhen Engineering Laboratory for Eco-efficient Recycled Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, University Town, Xili, Nanshan District, Shenzhen, 518055, P. R. China.
| | - Xingyu Liu
- Shenzhen Engineering Laboratory for Eco-efficient Recycled Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, University Town, Xili, Nanshan District, Shenzhen, 518055, P. R. China.
| | - Li Zhang
- Bureau of Agriculture and Livestock, Wongniute, Inner Mongolia, 024500, P. R. China
| | - Qindong Chen
- Shenzhen Engineering Laboratory for Eco-efficient Recycled Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, University Town, Xili, Nanshan District, Shenzhen, 518055, P. R. China.
| | - Qiyong Xu
- Shenzhen Engineering Laboratory for Eco-efficient Recycled Materials, School of Environment and Energy, Peking University Shenzhen Graduate School, University Town, Xili, Nanshan District, Shenzhen, 518055, P. R. China.
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Yan X, Chio C, Li H, Zhu Y, Chen X, Qin W. Colonization characteristics and surface effects of microplastic biofilms: Implications for environmental behavior of typical pollutants. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 937:173141. [PMID: 38761927 DOI: 10.1016/j.scitotenv.2024.173141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2024] [Revised: 04/22/2024] [Accepted: 05/09/2024] [Indexed: 05/20/2024]
Abstract
This paper summarizes the colonization dynamics of biofilms on microplastics (MPs) surfaces in aquatic environments, encompassing bacterial characteristics, environmental factors affecting biofilm formation, and matrix types and characteristics. The interaction between biofilm and MPs was also discussed. Through summarizing recent literatures, it was found that MPs surfaces offer numerous benefits to microorganisms, including nutrient enrichment and enhanced resistance to environmental stress. Biofilm colonization changes the surface physical and chemical properties as well as the transport behavior of MPs. At the same time, biofilms also play an important role in the fragmentation and degradation of MPs. In addition, we also investigated the coexistence level, adsorption mechanism, enrichment, and transformation of MPs by environmental pollutants mediated by biofilms. Moreover, an interesting aspect about the colonization of biofilms was discussed. Biofilm colonization not only had a great effect on the accumulation of heavy metals by MPs, but also affects the interaction between particles and environmental pollutants, thereby changing their toxic effects and increasing the difficulty of MPs treatment. Consequently, further attention and research are warranted to delve into the internal mechanisms, environmental risks, and the control of the coexistence of MPs and biofilms.
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Affiliation(s)
- Xiurong Yan
- College of Environmental & Resource Sciences, Shanxi University, Taiyuan 030006, Shanxi Province, China; Shanxi Laboratory for Yellow River, Taiyuan 030006, Shanxi Province, China
| | - Chonlong Chio
- Department of Biology, Lakehead University, Thunder Bay, Ontario P7B 5E1, Canada
| | - Hua Li
- College of Environmental & Resource Sciences, Shanxi University, Taiyuan 030006, Shanxi Province, China; Shanxi Laboratory for Yellow River, Taiyuan 030006, Shanxi Province, China
| | - Yuen Zhu
- College of Environmental & Resource Sciences, Shanxi University, Taiyuan 030006, Shanxi Province, China; Shanxi Laboratory for Yellow River, Taiyuan 030006, Shanxi Province, China; Department of Biology, Lakehead University, Thunder Bay, Ontario P7B 5E1, Canada.
| | - Xuantong Chen
- Department of Biology, Lakehead University, Thunder Bay, Ontario P7B 5E1, Canada
| | - Wensheng Qin
- Department of Biology, Lakehead University, Thunder Bay, Ontario P7B 5E1, Canada.
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An Z, Chen F, Hou L, Chen Q, Liu M, Zheng Y. Microplastics promote methane emission in estuarine and coastal wetlands. WATER RESEARCH 2024; 259:121853. [PMID: 38843628 DOI: 10.1016/j.watres.2024.121853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 05/14/2024] [Accepted: 05/28/2024] [Indexed: 06/25/2024]
Abstract
Increasing microplastic (MP) pollution poses significant threats to estuarine and coastal ecosystems. However, the effects of MPs on the emission of methane (CH4), a potent greenhouse gas, within these ecosystems and the underlying regulatory mechanisms have not been elucidated. Here, a combination of 13C stable isotope-based method and molecular techniques was applied to investigate how conventional petroleum-based MPs [polyethylene (PE) and polyvinyl chloride (PVC)] and biodegradable MPs [polylactic acid (PLA) and polyadipate/butylene terephthalate (PBAT)] regulate CH4 production and consumption and thus affect CH4 emission dynamics in estuarine and coastal wetlands. Results indicated that both conventional and biodegradable MPs enhanced the emission of CH4 (P < 0.05), with the promoting effect being more significant for biodegradable MPs. However, the mechanisms by which conventional and biodegradable MPs promote CH4 emissions were different. Specifically, conventional MPs stimulated the emission of CH4 by inhibiting the processes of CH4 consumption, but had no significant effect on CH4 production rate. Nevertheless, biodegradable MPs promoted CH4 emissions via accelerating the activities the methanogens while inhibiting the oxidation of CH4, thus resulting in a higher degree of promoting effect on CH4 emissions than conventional MPs. Consistently, quantitative PCR further revealed a significant increase in the abundance of methyl-coenzyme M reductase gene (mcrA) of methanogens under the exposure of biodegradable MPs (P < 0.05), but not conventional MPs. Furthermore, the relative abundance of most genes involved in CH4 oxidation exhibited varying degrees of reduction after exposure to all types of MPs, based on metagenomics data. This study reveals the effects of MPs on CH4 emissions in estuarine and coastal ecosystems and their underlying mechanisms, highlighting that the emerging biodegradable MPs exhibited a greater impact than conventional MPs on promoting CH4 emissions in these globally important ecosystems, thereby accelerating global climate change.
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Affiliation(s)
- Zhirui An
- State Key Laboratory of Estuarine and Coastal Research, Yangtze Delta Estuarine Wetland Ecosystem Observation and Research Station, Ministry of Education & Shanghai, East China Normal University, Shanghai 200241, China
| | - Feiyang Chen
- Research Center for Monitoring and Environmental Sciences, Taihu Basin & East China Sea Ecological Environment Supervision and Administration Authority, Ministry of Ecology and Environment, Shanghai 200125, China
| | - Lijun Hou
- State Key Laboratory of Estuarine and Coastal Research, Yangtze Delta Estuarine Wetland Ecosystem Observation and Research Station, Ministry of Education & Shanghai, East China Normal University, Shanghai 200241, China
| | - Qiqing Chen
- State Key Laboratory of Estuarine and Coastal Research, Yangtze Delta Estuarine Wetland Ecosystem Observation and Research Station, Ministry of Education & Shanghai, East China Normal University, Shanghai 200241, China
| | - Min Liu
- School of Geographic Sciences, East China Normal University, Shanghai 200241, China; Key Laboratory of Geographic Information Science (Ministry of Education), East China Normal University, Shanghai 200241, China
| | - Yanling Zheng
- State Key Laboratory of Estuarine and Coastal Research, Yangtze Delta Estuarine Wetland Ecosystem Observation and Research Station, Ministry of Education & Shanghai, East China Normal University, Shanghai 200241, China; School of Geographic Sciences, East China Normal University, Shanghai 200241, China; Key Laboratory of Geographic Information Science (Ministry of Education), East China Normal University, Shanghai 200241, China.
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Chen Z, Ren J, Yun Z, Wen Q, Fu Q, Qiu S. Effects of agricultural mulch film on swine manure composting: Film degradation and nitrogen transformation. BIORESOURCE TECHNOLOGY 2024; 406:131042. [PMID: 38936678 DOI: 10.1016/j.biortech.2024.131042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2024] [Revised: 06/23/2024] [Accepted: 06/24/2024] [Indexed: 06/29/2024]
Abstract
The utilization of biodegradable mulch films (bio-MFs) is essential for agricultural safety. This study explored the effects of no MF (CK), aging bio-MF (BM), non-aging bio-MF (NBM), and aging polyethylene (PE)-MF (PEM) on swine manure composting. The results demonstrated that outdoor aging (45 days) accelerated the macroscopic degradation of bio-MF in the BM. A reduction in NH4+-N and NH3 emissions in the initial composting was observed owing to an increase in the carbon source or the bulking effect provided by the MFs. N2O emissions from days 9 to 21 were higher in the PEM than other treatments because of the formation of anaerobic zone in the MF-based aggregates. An obvious increase of amoA in PEM indicated a promoted nitrification during the maturation phase, meanwhile the increase of NO2--N and aggregate promoted denitrification. Altogether, MF influenced composting through the synergistic effects of increasing the carbon source, bulking effect, and aggregates.
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Affiliation(s)
- Zhiqiang Chen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin, Heilongjiang 150090, China; School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China
| | - Jie Ren
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin, Heilongjiang 150090, China; School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China
| | - Zerui Yun
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin, Heilongjiang 150090, China; School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China
| | - Qinxue Wen
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin, Heilongjiang 150090, China; School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China.
| | - Qiqi Fu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin, Heilongjiang 150090, China; School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China
| | - Shan Qiu
- State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin, Heilongjiang 150090, China; School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China
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