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Li P, Zhai W, Li B, Guo Q, Wang Y, Gu Y, Zheng L, Zhao F, Liu X, Wang P, Liu D. Glyphosate and urea co-exposure: Impacts on soil nitrogen cycling. JOURNAL OF HAZARDOUS MATERIALS 2025; 492:138150. [PMID: 40188540 DOI: 10.1016/j.jhazmat.2025.138150] [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: 01/30/2025] [Revised: 03/11/2025] [Accepted: 04/01/2025] [Indexed: 04/08/2025]
Abstract
Glyphosate, the most widely utilized herbicide, frequently coexists with nitrogen fertilizers such as urea in soil environments. Nitrogen cycling is a key process for maintaining soil ecological functions and nutrient balance. However, the effects of co-exposure to glyphosate and urea on this process have remained unclear. This study investigated the impact of co-exposure to glyphosate (10 mg/kg) and urea (260.87 or 347.83 mg/kg, equivalent to 180 or 240 kg N/ha) on soil nitrogen cycling through a 98-day incubation experiment. Soil nutrients, enzyme activities, bacterial community structure, and functional genes were analyzed. NH4+-N and NO3--N contents significantly decreased by 44.70-53.43 % and 36.74-49.12 %, respectively. Co-exposure reduced bacterial diversity and altered nitrogen cycling genes, decreasing nifH while increasing amoA and nosZ, indicating reduced nitrogen input potential and increased inorganic nitrogen loss. Enzyme analysis confirmed excessive activation of nitrification and denitrification, lowering nitrogen availability. Partial least squares structural equation modeling (PLS-SEM) showed co-exposure indirectly decreased NH4+-N and NO3--N via enhanced nitrate and nitrite reductase activities. The study highlights the complex interactions between herbicides and fertilizers in soil environments and underscores the need for further research to understand the implications for wider soil health and crop production in agriculture systems.
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Affiliation(s)
- Pengxi Li
- Department of Applied Chemistry, College of Science, China Agricultural University, No. 2, West Yuanmingyuan Road, Beijing 100193, PR China
| | - Wangjing Zhai
- Department of Applied Chemistry, College of Science, China Agricultural University, No. 2, West Yuanmingyuan Road, Beijing 100193, PR China
| | - Bingxue Li
- Department of Applied Chemistry, College of Science, China Agricultural University, No. 2, West Yuanmingyuan Road, Beijing 100193, PR China
| | - Qiqi Guo
- Department of Applied Chemistry, College of Science, China Agricultural University, No. 2, West Yuanmingyuan Road, Beijing 100193, PR China
| | - Yujue Wang
- Syngenta Crop Protection AG, Rosentalstrasse 67, Basel CH-4002, Switzerland
| | - Yucheng Gu
- Syngenta Ltd, Jealott's Hill International Research Centre, Bracknell, Berkshire RG42 6EY, UK
| | - Li Zheng
- Department of Applied Chemistry, College of Science, China Agricultural University, No. 2, West Yuanmingyuan Road, Beijing 100193, PR China
| | - Fanrong Zhao
- Department of Applied Chemistry, College of Science, China Agricultural University, No. 2, West Yuanmingyuan Road, Beijing 100193, PR China
| | - Xueke Liu
- Department of Applied Chemistry, College of Science, China Agricultural University, No. 2, West Yuanmingyuan Road, Beijing 100193, PR China
| | - Peng Wang
- Department of Applied Chemistry, College of Science, China Agricultural University, No. 2, West Yuanmingyuan Road, Beijing 100193, PR China
| | - Donghui Liu
- Department of Applied Chemistry, College of Science, China Agricultural University, No. 2, West Yuanmingyuan Road, Beijing 100193, PR China.
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Yu Y, Wang Y, Tang DWS, Xue S, Liu M, Geissen V, Yang X. Soil C-N and microbial community were altered by polybutylene adipate terephthalate microplastics. JOURNAL OF HAZARDOUS MATERIALS 2025; 493:138328. [PMID: 40253785 DOI: 10.1016/j.jhazmat.2025.138328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2024] [Revised: 04/11/2025] [Accepted: 04/16/2025] [Indexed: 04/22/2025]
Abstract
The risks posed by biodegradable plastics to the plant-soil system have been increasingly studied due to potentially hazardous effects on soil properties and nutrient cycling. In this study, we investigated the effects of Poly (butylene adipate-co-terephthalate) microplastics (PBAT-MPs) on soil carbon, nitrogen and microbial communities under different levels of contamination (0 % (control), 0.1 %, 0.2 %, 0.5 % and 1 %), in soils planted with soybean (Glycine max (Linn.) Merr.) and maize (Zea mays L.). The results showed that PBAT-MPs significantly altered soil dissolved organic carbon, dissolved organic nitrogen and nitrate nitrogen contents, and that these effects varied by plant type and growth stage (p < 0.05). PBAT-MPs significantly increased soil microbial biomass carbon and nitrogen for both plants (p < 0.05), except for microbial biomass nitrogen at the soybean flowering stage. PBAT-MPs altered the β-diversity and composition of bacterial and fungal communities, increasing the relative abundances of Proteobacteria but decreasing the relative abundances of Acidobacteriota for both plants. FAPROTAX analysis showed that PBAT-MPs had significant effects on functional bacterial groups related to the nitrogen and carbon cycle, that varied by plant type and growth stage. These results suggest that biodegradable microplastics may have plant-specific effects on soil microbial communities and microbial metabolism, and thereby influence soil carbon and nitrogen cycling.
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Affiliation(s)
- Yao Yu
- State Key Laboratory of Soil and Water Conservation and Desertification Control, College of Soil and Water Conservation Science and Engineering, Northwest A&F University, Yangling, 712100, China; College of Natural Resources and Environment, Northwest A&F University, Yangling 712100, China
| | - Yan Wang
- Soil Physics and Land Management Group, Wageningen University & Research, Wageningen 6700AA, the Netherlands
| | - Darrell W S Tang
- Water, Energy, and Environmental Engineering, University of Oulu, Finland
| | - Sha Xue
- State Key Laboratory of Soil and Water Conservation and Desertification Control, College of Soil and Water Conservation Science and Engineering, Northwest A&F University, Yangling, 712100, China
| | - Mengjuan Liu
- College of Agronomy, Northwest A&F University, Yangling 712100, China
| | - Violette Geissen
- Soil Physics and Land Management Group, Wageningen University & Research, Wageningen 6700AA, the Netherlands
| | - Xiaomei Yang
- State Key Laboratory of Soil and Water Conservation and Desertification Control, College of Soil and Water Conservation Science and Engineering, Northwest A&F University, Yangling, 712100, China; Soil Physics and Land Management Group, Wageningen University & Research, Wageningen 6700AA, the Netherlands.
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3
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Cao L, Wu H, Wu X, Feng Y, Ye W, Fan J, Yang Q. Effects of cyanotoxins on nitrogen transformation in aquaculture systems with microplastics coexposure: Adsorption behavior, bacterial communities and functional genes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 955:177079. [PMID: 39442720 DOI: 10.1016/j.scitotenv.2024.177079] [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: 08/17/2024] [Revised: 10/17/2024] [Accepted: 10/18/2024] [Indexed: 10/25/2024]
Abstract
Microcystin-LR (MC-LR) and microplastics (MPs) have attracted increasing attention as important new pollutants in freshwater fishery environments. However, there are few reports on the effects of long-term combined MC-LR and MPs pollution on nitrogen transformation and microbial communities in aquaculture ponds, and the resulting risks have yet to be determined. Therefore, in this study, traditional refractory MPs (polystyrene, PS), biodegradable MPs (polylactic acid, PLA) and MC-LR, which are common in freshwater fishery environments in China, were selected as pollutants to construct a microcosm that simulates freshwater aquaculture ponds. MC-LR coexposure to PS and PLA was tested to reveal the effects of these pollutants on nitrogen transformation and microbial communities in aquaculture ponds, as well as to elucidate the potential risks posed by traditional refractory MPs and biodegradable MPs to freshwater aquaculture ecosystems. The results revealed that the MPs had a relatively high adsorption rate for MC-LR and that PS presented a relatively high adsorption capacity, whereas PLA presented a relatively high desorption capacity. Single or combined MPs and MC-LR pollution disrupted the normal nitrogen cycle in the aquaculture system, causing an overall loss of nitrogen in the water, and denitrification and nitrogen fixation in the water were inhibited to a certain extent through the inhibition of nitrogen cycle-related functional genes, with the PS + MC-LR group having the greatest inhibitory effect. In addition, compared with single-pollutant exposure, combined exposure to MC-LR and MPs had a greater effect on the microbial community composition. Analysis of the integrated biomarker response (IBR) index revealed that the risk of combined exposure to MC-LR and PS was greater than that of single exposure, so this phenomenon merits further attention.
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Affiliation(s)
- Lin Cao
- Key Laboratory of Aquatic Resources Conservation and Development Technology Research, College of Life Sciences, Huzhou University, Huzhou City, Zhejiang Province 313000, China
| | - Hao Wu
- Huzhou Ecological and Environmental Monitoring Center of Zhejiang Province, Huzhou City, Zhejiang Province 313000, China
| | - Xiang Wu
- Key Laboratory of Aquatic Resources Conservation and Development Technology Research, College of Life Sciences, Huzhou University, Huzhou City, Zhejiang Province 313000, China.
| | - Yaru Feng
- Key Laboratory of Aquatic Resources Conservation and Development Technology Research, College of Life Sciences, Huzhou University, Huzhou City, Zhejiang Province 313000, China
| | - Wentao Ye
- Key Laboratory of Aquatic Resources Conservation and Development Technology Research, College of Life Sciences, Huzhou University, Huzhou City, Zhejiang Province 313000, China
| | - Jiaqi Fan
- Key Laboratory of Aquatic Resources Conservation and Development Technology Research, College of Life Sciences, Huzhou University, Huzhou City, Zhejiang Province 313000, China
| | - Quping Yang
- Key Laboratory of Aquatic Resources Conservation and Development Technology Research, College of Life Sciences, Huzhou University, Huzhou City, Zhejiang Province 313000, China
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Li M, He J, Chen X, Dong X, Liu S, Anderson CWN, Zhou M, Gao X, Tang X, Zhao D, Lan T. Interactive effects of microplastics and cadmium on soil properties, microbial communities and bok choy growth. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 955:176831. [PMID: 39395501 DOI: 10.1016/j.scitotenv.2024.176831] [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: 08/08/2024] [Revised: 10/06/2024] [Accepted: 10/07/2024] [Indexed: 10/14/2024]
Abstract
The simultaneous presence of microplastics (MPs) and cadmium (Cd) in soil environments has raised concerns regarding their potential interactive effects on soil-plant ecosystems. This study explores how polyethylene (PE) at concentrations of 0.5 % (w/w), 1 % (w/w), and 2 % (w/w), and Cd at concentrations of 3 mg kg-1 and 12 mg kg-1, either alone or combined, impact soil physicochemical properties, microbial community structures, and bok choy growth through a 40-day pot experiment. Our findings reveal that the addition of 2 % (w/w) PE significantly increased soil organic carbon (SOC). However, when 2 % PE coexisted with Cd, SOC levels decreased, potentially due to a reduction in enzyme activity (β-1,4-glucosidase). PE increased the proportion of 1-2 mm soil aggregates, while the coexistence of 2 % PE and Cd significantly increased the content of soil aggregates larger than 2 mm. The coexistence of PE and Cd increased available potassium (AK) in the soil by approximately 13 % to 41 %. Regarding bok choy growth, the aboveground biomass under 2 % PE was approximately 210 % of that under 0.5 % PE, possibly because of the enhancement in soil nutrients. The presence of Cd, however, reduced the chlorophyll content of bok choy by approximately 18 % to 34 %. Notably, the coexistence of high PE concentration (2 % w/w) and low Cd concentration (3 mg kg-1) resulted in the highest aboveground biomass among all coexistence treatments. Furthermore, the addition of PE and Cd significantly altered the structure of soil bacterial and fungal communities, with fungi showing a greater response. Bacteria were significantly associated with soil inorganic N content and plant growth. This study provides new insights into the interactions of microplastics and Cd within microbial-soil-plant systems.
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Affiliation(s)
- Mengxiao Li
- College of Resources, Sichuan Agricultural University, Chengdu 611130, Sichuan, China; Key Laboratory of Investigation and Monitoring, Protection and Utilization for Cultivated Land Resources, Ministry of Natural Resources, Chengdu 611130, Sichuan, China
| | - Jiaju He
- College of Resources, Sichuan Agricultural University, Chengdu 611130, Sichuan, China; Key Laboratory of Investigation and Monitoring, Protection and Utilization for Cultivated Land Resources, Ministry of Natural Resources, Chengdu 611130, Sichuan, China
| | - Xiaofeng Chen
- College of Resources, Sichuan Agricultural University, Chengdu 611130, Sichuan, China; Key Laboratory of Investigation and Monitoring, Protection and Utilization for Cultivated Land Resources, Ministry of Natural Resources, Chengdu 611130, Sichuan, China
| | - Xiaoman Dong
- College of Resources, Sichuan Agricultural University, Chengdu 611130, Sichuan, China; Key Laboratory of Investigation and Monitoring, Protection and Utilization for Cultivated Land Resources, Ministry of Natural Resources, Chengdu 611130, Sichuan, China
| | - Shuang Liu
- College of Resources, Sichuan Agricultural University, Chengdu 611130, Sichuan, China; Key Laboratory of Investigation and Monitoring, Protection and Utilization for Cultivated Land Resources, Ministry of Natural Resources, Chengdu 611130, Sichuan, China
| | - Christopher W N Anderson
- School of Agriculture and Environment, Massey University, Private Bag 11-222, Palmerston North, New Zealand
| | - Minghua Zhou
- Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, 610041 Chengdu, Sichuan, China
| | - Xuesong Gao
- College of Resources, Sichuan Agricultural University, Chengdu 611130, Sichuan, China; Key Laboratory of Investigation and Monitoring, Protection and Utilization for Cultivated Land Resources, Ministry of Natural Resources, Chengdu 611130, Sichuan, China
| | - Xiaoyan Tang
- College of Resources, Sichuan Agricultural University, Chengdu 611130, Sichuan, China; Key Laboratory of Investigation and Monitoring, Protection and Utilization for Cultivated Land Resources, Ministry of Natural Resources, Chengdu 611130, Sichuan, China
| | - Di Zhao
- General Station of Arable Soil Quality and Fertilizer of Sichuan Province, 610041 Chengdu, Sichuan, China
| | - Ting Lan
- College of Resources, Sichuan Agricultural University, Chengdu 611130, Sichuan, China; Key Laboratory of Investigation and Monitoring, Protection and Utilization for Cultivated Land Resources, Ministry of Natural Resources, Chengdu 611130, Sichuan, China.
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Wang W, Shi H, Liu X, Mao L, Zhang L, Zhu L, Wu C, Wu W. Enhanced remediation of acetochlor-contaminated soils using phosphate-modified biochar: Impacts on environmental fate, microbial communities, and plant health. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 956:177359. [PMID: 39500462 DOI: 10.1016/j.scitotenv.2024.177359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2024] [Revised: 10/29/2024] [Accepted: 10/31/2024] [Indexed: 11/12/2024]
Abstract
Given that acetochlor (ACT) persists in soil for extended periods, disrupting microbial community structure and causing phytotoxicity to sensitive crops, this study investigated the potential of phosphate-modified biochar (PBC-800) to remediate ACT-contaminated soil. Incorporating 0.5 % PBC-800 into fluvo-aquic, red, and black soils increased their adsorption capacities by 80.4 mg g-1, 76.6 mg g-1, and 76.0 mg g-1, respectively. Even after six months of aging, the Kf values remained 1.6 to 5.1 times higher than in untreated soils. PBC-800 also accelerated ACT degradation across all three soil types, reducing residual ACT levels by 34.3 % to 76.4 % after 60 days, and shortening the degradation half-life by 5 to 7 days. High-throughput sequencing revealed that ACT reduced soil microbial diversity and disrupted community structure, while 0.5 % PBC-800 amendments promoted the growth of degradation-capable genera such as Rhodococcus, Lysobacter, and Gemmatimonas, enhancing microbial ecosystem stability. Furthermore, the amendment of soil with 0.5 % PBC-800 reduced ACT residue concentrations in maize and soybeans by 76.5 % to 82.9 %, and restored plant biomass, leaf chlorophyll content, and mesophyll cell ultrastructure to levels comparable to the control. Therefore, amending ACT-contaminated soil with PBC-800 mitigates ecological and environmental risks, boosts microbial activity, and safeguards plant health.
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Affiliation(s)
- Wei Wang
- State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Haojie Shi
- State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Xingang Liu
- State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Liangang Mao
- State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Lan Zhang
- State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Lizhen Zhu
- State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Chi Wu
- State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Wenzhu Wu
- Nanjing Institute of Environmental Sciences, MEE, Nanjing 211299, China.
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Liang L, Tang Z, Jiang Y, Ding C, Tang M, Zhi Y, Xu X, Fang F, Guo J, Zhu D, Yang C. Impacts of the coexistence of polystyrene microplastics and pesticide imidacloprid on soil nitrogen transformations and microbial communities. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 370:123054. [PMID: 39467461 DOI: 10.1016/j.jenvman.2024.123054] [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: 06/23/2024] [Revised: 10/13/2024] [Accepted: 10/20/2024] [Indexed: 10/30/2024]
Abstract
The pollution of agricultural soils by microplastics (MPs) and pesticides has attracted significant attention. However, the combined impact of MPs and pesticides on soil nitrogen transformation and microbial communities remains unclear. In this study, we conducted a 28-day soil incubation experiment, introducing polystyrene microplastics (PS-MPs) at concentrations of 0.1% and 10% (w/w) and pesticide imidacloprid at concentrations of 0.1 mg/kg and 1.0 mg/kg. Our aim was to investigate the individual and combined effects of these pollutants on nitrogen transformations and microbial communities in agricultural soils. Imidacloprid accelerated the decline in soil pH, while PS-MPs slowed the process. Imidacloprid hindered soil nitrification and denitrification processes, however, the presence of PS-MPs mitigated the inhibitory effects of imidacloprid. Based on microbial community and functional annotation analyses, this is mainly attributed to the different effects of PS-MPs and imidacloprid on soil microbial communities and the expression of key nitrogen transformation-related genes. Variance partitioning analysis and partial least squares path modeling analyses revealed that PS-MPs and imidacloprid indirectly influenced the microbial community structure, primarily through changes in soil pH. This study elucidates the mechanism through which the combined stress of MPs and pesticides in agricultural soils influence soil nitrogen transformation and microbial communities. The findings offer valuable insights for the systematic evaluation of the ecological risks posed by the coexistence of these pollutants.
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Affiliation(s)
- Luntao Liang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
| | - Zichao Tang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
| | - Yanxue Jiang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
| | - Chen Ding
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
| | - Miaoyi Tang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
| | - Yue Zhi
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
| | - Xiaowei Xu
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China.
| | - Fang Fang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
| | - Jinsong Guo
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
| | - Dong Zhu
- A Key Laboratory of Urban Environment and Health, Ningbo Observation and Research Station, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China
| | - Cuilan Yang
- Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing, 400045, China
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Fang C, Yang Y, Zhang S, He Y, Pan S, Zhou L, Wang J, Yang H. Unveiling the impact of microplastics with distinct polymer types and concentrations on tidal sediment microbiome and nitrogen cycling. JOURNAL OF HAZARDOUS MATERIALS 2024; 472:134387. [PMID: 38723479 DOI: 10.1016/j.jhazmat.2024.134387] [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: 12/28/2023] [Revised: 04/17/2024] [Accepted: 04/21/2024] [Indexed: 05/30/2024]
Abstract
Microplastics (MPs) are distributed widely in the ocean surface waters and sediments. Increasing MPs contamination in intertidal zone profoundly impacts microbial ecosystem services and biogeochemical process. Little is known about the response of tidal sediment microbiome to MPs. We conducted a 30-day laboratory microcosm study using five polymers (PE, PBS, PC, PLA and PET) at three concentrations (1 %, 2 % and 5 %, w/w). High throughput sequencing of 16 S rRNA, qPCR and enzyme activity test were applied to demonstrate the response of microbial community and nitrogen cycling functional genes to MPs. MPs reduced the microbial alpha diversity and the microbial dissimilarity while the effects of PLA-MPs were concentration dependent. LEfSe analysis indicated that the Proteobacteria predominated for all MP treatments. Mantel's test, RDA and correlation analysis implied that pH may be the key environmental factor for causing microbial alterations. MPs enhanced nitrogen fixation in tidal sediment. PLA levels of 1 % but not 5 % produced the most significant effects in nitrogen cycling functional microbiota and genes. PLS-PM revealed that impacts of MPs on tidal sediment microbial communities and nitrogen cycling were dominated by indirect effects. Our study deepened understanding and filled the knowledge gap of MP contaminants affecting tidal sediment microbial nitrogen cycling.
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Affiliation(s)
- Chang Fang
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China; Zhongshan Innovation Center of South China Agricultural University, Zhongshan 528400, China
| | - Yuting Yang
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China; Zhongshan Innovation Center of South China Agricultural University, Zhongshan 528400, China
| | - Shuping Zhang
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China; Zhongshan Innovation Center of South China Agricultural University, Zhongshan 528400, China
| | - Yinglin He
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China; Zhongshan Innovation Center of South China Agricultural University, Zhongshan 528400, China
| | - Sentao Pan
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China; Zhongshan Innovation Center of South China Agricultural University, Zhongshan 528400, China
| | - Lei Zhou
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Jun Wang
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China
| | - Huirong Yang
- College of Marine Sciences, South China Agricultural University, Guangzhou 510642, China; Zhongshan Innovation Center of South China Agricultural University, Zhongshan 528400, China.
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Li Y, Tang Y, Qiang W, Xiao W, Lian X, Yuan S, Yuan Y, Wang Q, Liu Z, Chen Y. Effect of tire wear particle accumulation on nitrogen removal and greenhouse gases abatement in bioretention systems: Soil characteristics, microbial community, and functional genes. ENVIRONMENTAL RESEARCH 2024; 251:118574. [PMID: 38452911 DOI: 10.1016/j.envres.2024.118574] [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: 01/24/2024] [Revised: 02/25/2024] [Accepted: 02/26/2024] [Indexed: 03/09/2024]
Abstract
Tire wear particles (TWPs), as predominant microplastics (MPs) in road runoff, can be captured and retained by bioretention systems (BRS). This study aimed to investigate the effect of TWPs accumulation on nitrogen processes, focusing on soil characteristics, microbial community, and functional genes. Two groups of lab-scale bioretention columns containing TWPs (0 and 100 mg g-1) were established. The removal efficiencies of NH4+-N and TN in BRS significantly decreased by 7.60%-24.79% and 1.98%-11.09%, respectively, during the 101 days of TWPs exposure. Interestingly, the emission fluxes of N2O and CO2 were significantly decreased, while the emission flux of CH4 was substantially increased. Furthermore, prolonged TWPs exposure significantly influenced the contents of soil organic matter (increased by 27.07%) and NH4+-N (decreased by 42.15%) in the planting layer. TWPs exposure also significantly increased dehydrogenase activity and substrate-induced respiration rate, thereby promoting microbial metabolism. Microbial sequencing results revealed that TWPs decreased the relative abundance of nitrifying bacteria (Nitrospira and Nitrosomonas) and denitrifying bacteria (Dechloromonas and Thauera), reducing the nitrification rate by 42.24%. PICRUSt2 analysis further indicated that TWPs changed the relative abundance of functional genes related to nitrogen and enzyme-coding genes.
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Affiliation(s)
- Yunqing Li
- School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing, 400074, China
| | - Yinghui Tang
- School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing, 400074, China; School of Civil and Environmental Engineering, The University of New South Wales, Sydney, NSW, 2052, Australia
| | - Weibo Qiang
- Central & Southern China Municipal Engineering Design and Research Institute Co., Ltd., Wuhan, 430010, China
| | - Wenyu Xiao
- School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing, 400074, China
| | - Xiaoke Lian
- School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing, 400074, China
| | - Shaochun Yuan
- School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing, 400074, China; Engineering Laboratory of Environmental Hydraulic Engineering of Chongqing Municipal Development and Reform Commission, Chongqing Jiaotong University, Chongqing, 400074, China
| | - Ying Yuan
- School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing, 400074, China
| | - Qinyi Wang
- School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing, 400074, China
| | - Zhen Liu
- School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing, 400074, China; Engineering Laboratory of Environmental Hydraulic Engineering of Chongqing Municipal Development and Reform Commission, Chongqing Jiaotong University, Chongqing, 400074, China
| | - Yao Chen
- School of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing, 400074, China; Engineering Laboratory of Environmental Hydraulic Engineering of Chongqing Municipal Development and Reform Commission, Chongqing Jiaotong University, Chongqing, 400074, China.
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