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Li J, Peng W, Yin X, Wang X, Liu Z, Liu Q, Deng Z, Lin S, Liang R. Identification of an efficient phenanthrene-degrading Pseudarthrobacter sp. L1SW and characterization of its metabolites and catabolic pathway. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133138. [PMID: 38086304 DOI: 10.1016/j.jhazmat.2023.133138] [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: 08/29/2023] [Revised: 10/25/2023] [Accepted: 11/28/2023] [Indexed: 02/08/2024]
Abstract
Phenanthrene, a typical chemical of polycyclic aromatic hydrocarbons (PAHs) pollutants, severely threatens health of wild life and human being. Microbial degradation is effective and environment-friendly for PAH removal, while the phenanthrene-degrading mechanism in Gram-positive bacteria is unclear. In this work, one Gram-positive strain of plant growth-promoting rhizobacteria (PGPR), Pseudarthrobacter sp. L1SW, was isolated and identified with high phenanthrene-degrading efficiency and great stress tolerance. It degraded 96.3% of 500 mg/L phenanthrene in 72 h and kept stable degradation performance with heavy metals (65 mg/L of Zn2+, 5.56 mg/L of Ni2+, and 5.20 mg/L of Cr3+) and surfactant (10 CMC of Tween 80). Strain L1SW degraded phenanthrene mainly through phthalic acid pathway, generating intermediate metabolites including cis-3,4-dihydrophenanthrene-3,4-diol, 1-hydroxy-2-naphthoic acid, and phthalic acid. A novel metabolite (m/z 419.0939) was successfully separated and identified as an end-product of phenanthrene, suggesting a unique metabolic pathway. With the whole genome sequence alignment and comparative genomic analysis, 19 putative genes associated with phenanthrene metabolism in strain L1SW were identified to be distributed in three gene clusters and induced by phenanthrene and its metabolites. These findings advance the phenanthrene-degrading study in Gram-positive bacteria and promote the practical use of PGPR strains in the bioremediation of PAH-contaminated environments.
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Affiliation(s)
- Junlan Li
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Wanli Peng
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Xianqi Yin
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Xiaozheng Wang
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Zhixiang Liu
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Qinchen Liu
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Zixin Deng
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Shuangjun Lin
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Rubing Liang
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic & Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China.
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Rao L, Gu D, Xiang X, Zeng J, Wu Y, Lin X, Christie P. Impact of lignin constituents on the bacterial community and polycyclic aromatic hydrocarbon co-metabolism in an agricultural soil. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 333:122105. [PMID: 37356789 DOI: 10.1016/j.envpol.2023.122105] [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: 04/19/2023] [Revised: 06/13/2023] [Accepted: 06/22/2023] [Indexed: 06/27/2023]
Abstract
Lignin is a complex biopolymer comprising phenolic monomers with different degrees of methoxylation and may potentially enhance the degradation of soil pollutants such as polycyclic aromatic hydrocarbons (PAHs) through co-metabolism. However, the contribution of lignin constituents, including phenolic and methoxy subunits, to PAH biodegradation remains unclear. Here, p-hydroxybenzoate (pHBA), vanillate and methanol were selected to simulate phenolic units and methoxy groups of lignin. Soil microcosms receiving these compounds were established to evaluate their regulation on the bacterial community and PAH co-metabolism. There were different effects of different components on the biodegradation of a four-ring PAH, benzo(a)anthracene (BaA), as characterized using an isotopic tracer. Only vanillate significantly stimulated BaA mineralization to CO2, with pHBA and methanol leading to no appreciable change in the allocation of BaA in soil compartments. The lignin constituents had differential impacts on the soil bacterial community, with substantial enrichment of methylotrophs occurring in methanol-supplemented microcosms. Both vanillate and pHBA selected several aromatic degraders. Vanillate caused additional enrichment of methylotrophs, suggesting structure-dependent stimulation of bacterial functional guilds by lignin monomers. Compared with its constituents, lignin produced more extensive responses in terms of bacterial diversity and composition and the fate of BaA. However, it was difficult to link BaA co-metabolism to any specific bacterial taxa in the presence of lignin or its subunits. The results indicate that the co-metabolism effects of lignin may not be directly associated with phenolic or methoxy metabolism but with its regulation of the soil microbiome.
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Affiliation(s)
- Leizhen Rao
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Decheng Gu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; Anhui Province Key Laboratory of Wetland Ecological Protection and Restoration, School of Resources and Environmental Engineering, Anhui University, Hefei, 230031, China
| | - Xingjia Xiang
- Anhui Province Key Laboratory of Wetland Ecological Protection and Restoration, School of Resources and Environmental Engineering, Anhui University, Hefei, 230031, China
| | - Jun Zeng
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Yucheng Wu
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of the Chinese Academy of Sciences, Beijing, 100049, China.
| | - Xiangui Lin
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Peter Christie
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
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Li W, Zhu Y, Li K, Wang L, Li D, Liu N, Huang S. Synergistic remediation of phenanthrene-cadmium co-contaminants by an immobilized acclimated bacterial-fungal consortium and its community response. CHEMOSPHERE 2023:139234. [PMID: 37327827 DOI: 10.1016/j.chemosphere.2023.139234] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 04/20/2023] [Accepted: 06/13/2023] [Indexed: 06/18/2023]
Abstract
Bioremediation has tremendous potential to mitigate the serious threats posed by polycyclic aromatic hydrocarbons (PAHs) and heavy metals (HMs). In the present study, nine bacterial-fungal consortia were progressively acclimated under different culture conditions. Among them, a microbial consortium 1, originating from activated sludge and copper mine sludge microorganisms, was developed through the acclimation of a multi-substrate intermediate (catechol)-target contaminant (Cd2+, phenanthrene (PHE)). Consortium 1 exhibited the best PHE degradation, with an efficiency of 95.6% after 7 d of inoculation, and its tolerance concentration for Cd2+ was up to 1800 mg/L within 48 h. Bacteria Pandoraea and Burkholderia-Caballeronia-Paraburkholderia, as well as fungi Ascomycota and Basidiomycota predominated in the consortium 1. Furthermore, a biochar-loaded consortium was constructed to better cope with the co-contamination behavior, which exhibited excellent adaptation to Cd2+ ranging of 50-200 mg/L. Immobilized consortium efficiently degraded 92.02-97.77% of 50 mg/L PHE within 7 d while removing 93.67-99.04% of Cd2+. In remediation of co-pollution, immobilization technology improved the bioavailability of PHE and dehydrogenase activity of the consortium to enhance PHE degradation, and the phthalic acid pathway was the main metabolic pathway. As for Cd2+ removal, oxygen-containing functional groups (-OH, C=O, and C-O) of biochar or microbial cell walls and EPS components, fulvic acid and aromatic proteins, participated through chemical complexation and precipitation. Furthermore, immobilization led to more active consortium metabolic activity during the reaction, and the community structure developed in a more favorable direction. The dominant species were Proteobacteria, Bacteroidota, and Fusarium, and the predictive expression of functional genes corresponding to key enzymes was elevated. This study provides a basis for combining biochar and acclimated bacterial-fungal consortia for co-contaminated site remediation.
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Affiliation(s)
- Wei Li
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, 221116, China
| | - Yanfeng Zhu
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, 221116, China
| | - Kang Li
- College of Environmental Science and Engineering, Peking University, Beijing, 100871, China
| | - Liping Wang
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, 221116, China.
| | - Dan Li
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, 221116, China
| | - Na Liu
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, 221116, China
| | - Shaomeng Huang
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, 221116, China
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Mallick S, Das S. Acid-tolerant bacteria and prospects in industrial and environmental applications. Appl Microbiol Biotechnol 2023; 107:3355-3374. [PMID: 37093306 DOI: 10.1007/s00253-023-12529-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 04/06/2023] [Accepted: 04/11/2023] [Indexed: 04/25/2023]
Abstract
Acid-tolerant bacteria such as Streptococcus mutans, Acidobacterium capsulatum, Escherichia coli, and Propionibacterium acidipropionici have developed several survival mechanisms to sustain themselves in various acid stress conditions. Some bacteria survive by minor changes in the environmental pH. In contrast, few others adapt different acid tolerance mechanisms, including amino acid decarboxylase acid resistance systems, mainly glutamate-dependent acid resistance (GDAR) and arginine-dependent acid resistance (ADAR) systems. The cellular mechanisms of acid tolerance include cell membrane alteration in Acidithiobacillus thioxidans, proton elimination by F1-F0-ATPase in Streptococcus pyogenes, biofilm formation in Pseudomonas aeruginosa, cytoplasmic urease activity in Streptococcus mutans, synthesis of the protective cloud of ammonia, and protection or repair of macromolecules in Bacillus caldontenax. Apart from cellular mechanisms, there are several acid-tolerant genes such as gadA, gadB, adiA, adiC, cadA, cadB, cadC, speF, and potE that help the bacteria to tolerate the acidic environment. This acid tolerance behavior provides new and broad prospects for different industrial applications and the bioremediation of environmental pollutants. The development of engineered strains with acid-tolerant genes may improve the efficiency of the transgenic bacteria in the treatment of acidic industrial effluents. KEY POINTS: • Bacteria tolerate the acidic stress by methylating unsaturated phospholipid tail • The activity of decarboxylase systems for acid tolerance depends on pH • Genetic manipulation of acid-tolerant genes improves acid tolerance by the bacteria.
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Affiliation(s)
- Souradip Mallick
- Laboratory of Environmental Microbiology and Ecology (LEnME), Department of Life Science, National Institute of Technology, Rourkela, 769 008, Odisha, India
| | - Surajit Das
- Laboratory of Environmental Microbiology and Ecology (LEnME), Department of Life Science, National Institute of Technology, Rourkela, 769 008, Odisha, India.
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5
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Zhou Q, Li R, Li T, Zhou R, Hou Z, Zhang X. Interactions among microorganisms functionally active for electron transfer and pollutant degradation in natural environments. ECO-ENVIRONMENT & HEALTH (ONLINE) 2023; 2:3-15. [PMID: 38074455 PMCID: PMC10702900 DOI: 10.1016/j.eehl.2023.01.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 12/13/2022] [Accepted: 01/03/2023] [Indexed: 03/03/2024]
Abstract
Compared to single microbial strains, complex interactions between microbial consortia composed of various microorganisms have been shown to be effective in expanding ecological functions and accomplishing biological processes. Electroactive microorganisms (EMs) and degradable microorganisms (DMs) play vital roles in bioenergy production and the degradation of organic pollutants hazardous to human health. These microorganisms can strongly interact with other microorganisms and promote metabolic cooperation, thus facilitating electricity production and pollutant degradation. In this review, we describe several specific types of EMs and DMs based on their ability to adapt to different environments, and summarize the mechanism of EMs in extracellular electron transfer. The effects of interactions between EMs and DMs are evaluated in terms of electricity production and degradation efficiency. The principle of the enhancement in microbial consortia is also introduced, such as improved biomass, changed degradation pathways, and biocatalytic potentials, which are directly or indirectly conducive to human health.
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Affiliation(s)
- Qixing Zhou
- MOE Key Laboratory of Pollution Processes and Environmental Criteria / Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Ruixiang Li
- MOE Key Laboratory of Pollution Processes and Environmental Criteria / Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Tian Li
- MOE Key Laboratory of Pollution Processes and Environmental Criteria / Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Ruiren Zhou
- Department of Biological and Agricultural Engineering, Texas A&M University, TX 77843-2117, USA
| | - Zelin Hou
- MOE Key Laboratory of Pollution Processes and Environmental Criteria / Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Xiaolin Zhang
- MOE Key Laboratory of Pollution Processes and Environmental Criteria / Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
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Wang D, Qin L, Liu E, Chai G, Su Z, Shan J, Yang Z, Wang Z, Wang H, Meng H, Zheng X, Li H, Li J, Lin Y. Biodegradation performance and diversity of enriched bacterial consortia capable of degrading high-molecular-weight polycyclic aromatic hydrocarbons. ENVIRONMENTAL TECHNOLOGY 2022; 43:4200-4211. [PMID: 34148513 DOI: 10.1080/09593330.2021.1946163] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 06/13/2021] [Indexed: 06/12/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are key organic pollutants in the environment that pose threats to the ecosystem and human health. The degradation of high molecular weight (HMW) PAHs by enriched bacterial consortia has been previously studied, while the involved metabolisms and microbial communities are still unclear and warrant further investigations. In this study, five bacterial consortia capable of utilizing different PAHs (naphthalene, anthracene, and pyrene) as the sole carbon and energy sources were enriched from PAH-contaminated soil samples. Among the five consortia, consortium TC exhibited the highest pyrene degradation efficiency (91%) after 19 d of incubation. The degradation efficiency was further enhanced up to 99% by supplementing yeast extract. Besides, consortium TC showed tolerances to high concentrations of pyrene (up to 1000 mg/L) and different heavy metal stresses (including Zn2+, Cd2+, and Pb2+). The dominant genus in consortium TC, GS, and PL showing relatively higher degradation efficiency for anthracene and pyrene was Pseudomonas, whereas consortium PG and GD were predominated by genus Achromobacter and class Enterobacteriaceae, respectively. Consortium TC, as a highly efficient HMW PAH-degrading consortium, could be applied for synergistic biodegradation of HMW PAHs and in situ bioremediation of the sites contaminated with both PAHs and heavy metals.
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Affiliation(s)
- Dongqi Wang
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an, People's Republic of China
- Shaanxi Key Laboratory of Water Resources and Environment, Xi'an University of Technology, Xi'an, People's Republic of China
- Department of Municipal and Environmental Engineering, Xi'an University of Technology, Xi'an, People's Republic of China
| | - Lu Qin
- Department of Municipal and Environmental Engineering, Xi'an University of Technology, Xi'an, People's Republic of China
| | - Enyu Liu
- Department of Municipal and Environmental Engineering, Xi'an University of Technology, Xi'an, People's Republic of China
| | - Guodong Chai
- Department of Municipal and Environmental Engineering, Xi'an University of Technology, Xi'an, People's Republic of China
| | - Zhenduo Su
- Department of Municipal and Environmental Engineering, Xi'an University of Technology, Xi'an, People's Republic of China
| | - Jiaqi Shan
- Department of Municipal and Environmental Engineering, Xi'an University of Technology, Xi'an, People's Republic of China
| | - Zhangjie Yang
- Department of Municipal and Environmental Engineering, Xi'an University of Technology, Xi'an, People's Republic of China
| | - Zhe Wang
- Department of Municipal and Environmental Engineering, Xi'an University of Technology, Xi'an, People's Republic of China
| | - Hui Wang
- Department of Municipal and Environmental Engineering, Xi'an University of Technology, Xi'an, People's Republic of China
| | - Haiyu Meng
- Department of Municipal and Environmental Engineering, Xi'an University of Technology, Xi'an, People's Republic of China
| | - Xing Zheng
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an, People's Republic of China
- Department of Municipal and Environmental Engineering, Xi'an University of Technology, Xi'an, People's Republic of China
| | - Huaien Li
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an, People's Republic of China
- Department of Municipal and Environmental Engineering, Xi'an University of Technology, Xi'an, People's Republic of China
| | - Jiake Li
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an, People's Republic of China
- Department of Municipal and Environmental Engineering, Xi'an University of Technology, Xi'an, People's Republic of China
| | - Yishan Lin
- State Key Laboratory of Pollution Control & Resource Reuse, School of the Environment, Nanjing University, Nanjing, People's Republic of China
- State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Science, Xi'an, People's Republic of China
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Zhang H, Chao B, Wang H, Li X. Effects of carbon source on electricity generation and PAH removal in aquaculture sediment microbial fuel cells. ENVIRONMENTAL TECHNOLOGY 2022; 43:4066-4077. [PMID: 34129447 DOI: 10.1080/09593330.2021.1942557] [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: 10/07/2020] [Accepted: 06/03/2021] [Indexed: 06/12/2023]
Abstract
Sediment microbial fuel cells (SMFCs) have been used for treating pollutants in sediment or overlying water. This study investigated the feasibility of constructing SMFCs under aquaculture conditions by employing indigenous carbohydrates as substrates to enhance the removal efficiency of polycyclic aromatic hydrocarbons (PAHs) in sediment, as well as the correlation between PAHs removal and electricity generation in SMFCs. The results showed that adding glucose could allow SMFCs to generate more electrical power and increase the removal efficiency of PAHs (by 57.2% for naphthalene, 41.3% for acenaphthene, and 36.5% for pyrene). In addition, starch enhanced PAHs removal by 49.9%, 35.8%, and 31.2%, respectively, whereas cellulose enhanced removal by 44.3%, 29.3%, and 26.9%, respectively. Pearson correlation coefficients between the level of electrical power generated and the removal masses of the three PAHs were 0.485, 0.830**, and 0.851**. Thus, the use of SMFCs could be an effective approach for PAH treatment in aquaculture, and the electrical power generated could be used as an in-situ indicator for the biodegradation rate of SMFCs.
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Affiliation(s)
- Haochi Zhang
- School of Energy and Environment, Southeast University, Nanjing, People's Republic of China
| | - Bo Chao
- School of Energy and Environment, Southeast University, Nanjing, People's Republic of China
| | - Hui Wang
- State Key Laboratory of Eco-hydraulics in Northwest Arid Region, Xi'an University of Technology, Xi'an, People's Republic of China
| | - Xianning Li
- School of Energy and Environment, Southeast University, Nanjing, People's Republic of China
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Silambarasan S, Cornejo P, Vangnai AS. Biodegradation of 4-nitroaniline by novel isolate Bacillus sp. strain AVPP64 in the presence of pesticides. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 306:119453. [PMID: 35569624 DOI: 10.1016/j.envpol.2022.119453] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 04/22/2022] [Accepted: 05/07/2022] [Indexed: 06/15/2023]
Abstract
In this study, Bacillus sp. strain AVPP64 was isolated from diuron-contaminated soil. It showed 4-nitroaniline (4-NA) degradation, pesticide tolerance, and self-nutrient integration via nitrogen (N)-fixation and phosphate (P)-solubilization. The rate constant (k) and half-life period (t1/2) of 4-NA degradation in the aqueous medium inoculated with strain AVPP64 were observed to be 0.445 d-1 and 1.55 d, respectively. Nevertheless, in the presence of chlorpyrifos, profenofos, atrazine and diuron pesticides, strain AVPP64 degraded 4-NA with t1/2 values of 2.55 d, 2.26 d, 2.31 d and 3.54 d, respectively. The strain AVPP64 fixed 140 μg mL-1 of N and solubilized 103 μg mL-1 of P during the presence of 4-NA. In addition, strain AVPP64 produced significant amounts of plant growth-promoting metabolites like indole 3-acetic acid, siderophores, exo-polysaccharides and ammonia. In the presence of 4-NA and various pesticides, strain AVPP64 greatly increased the growth and biomass of Vigna radiata and Crotalaria juncea plants. These results revealed that Bacillus sp. strain AVPP64 can be used as an inoculum for bioremediation of 4-NA contaminated soil and sustainable crop production even when pesticides are present.
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Affiliation(s)
- Sivagnanam Silambarasan
- Centro de Investigación en Micorrizas y Sustentabilidad Agroambiental, CIMYSA, Universidad de La Frontera, Avenida Francisco Salazar 01145, Temuco, Chile; Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
| | - Pablo Cornejo
- Centro de Investigación en Micorrizas y Sustentabilidad Agroambiental, CIMYSA, Universidad de La Frontera, Avenida Francisco Salazar 01145, Temuco, Chile; Scientific and Technological Bioresource Nucleus, BIOREN-UFRO, Departamento de Ciencias Químicas y Recursos Naturales, Universidad de La Frontera, Avenida Francisco Salazar 01145, Temuco, Chile.
| | - Alisa S Vangnai
- Department of Biochemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; Center of Excellence in Biocatalyst and Sustainable Biotechnology, Faculty of Science, Chulalongkorn University, Bangkok 10300, Thailand.
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9
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Cao X, Cui X, Xie M, Zhao R, Xu L, Ni S, Cui Z. Amendments and bioaugmentation enhanced phytoremediation and micro-ecology for PAHs and heavy metals co-contaminated soils. JOURNAL OF HAZARDOUS MATERIALS 2022; 426:128096. [PMID: 34952500 DOI: 10.1016/j.jhazmat.2021.128096] [Citation(s) in RCA: 44] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2021] [Revised: 12/13/2021] [Accepted: 12/14/2021] [Indexed: 06/14/2023]
Abstract
Co-existence of polycyclic aromatic hydrocarbons (PAHs) and multi-metals challenges the decontamination of large-scale contaminated sites. This study aims to comprehensively evaluate the remediation potential of intensified phytoremediation in coping with complex co-contaminated soils. Results showed that the removal of PAHs and heavy metals is time-dependent, pollution-relevant, and plant-specific. Removal of sixteen PAHs by Medicago sativa L. (37.3%) was significantly higher than that of Solanum nigrum L. (20.7%) after 30 days. S. nigrum L. removed higher amounts of Cd than Zn and Pb, while M. sativa L. uptake more Zn. Nevertheless, amendments and microbial agents significantly increased the phytoremediation efficiency of pollutants and shortened the gap between plants. Cd removal and PAHs dissipation reached up to 80% and 90% after 90 days for both plants. Heavy metal stability in soil was promoted after the intensified phytoremediation. Plant lipid peroxidation was alleviated, regulated by changed antioxidant defense systems (superoxide dismutase, peroxidase, catalase). Soil enzyme activities including dehydrogenase, urease, and catalase increased up to 5-fold. Soil bacterial diversity and structure were changed, being largely composed of Proteobacteria, Actinobacteria, Patescibacteria, Bacteroidetes, and Firmicutes. These findings provide a green and sustainable approach to decontaminating complex-polluted environments with comprehensive improvement of soil health.
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Affiliation(s)
- Xiufeng Cao
- School of Environmental Science and Engineering, Shandong University, 72 Binhai Road, Jimo District, Qingdao 266237, Shandong, PR China
| | - Xiaowei Cui
- School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200030, PR China
| | - Meng Xie
- School of Environmental Science and Engineering, Shandong University, 72 Binhai Road, Jimo District, Qingdao 266237, Shandong, PR China
| | - Rui Zhao
- School of Environmental Science and Engineering, Shandong University, 72 Binhai Road, Jimo District, Qingdao 266237, Shandong, PR China
| | - Lei Xu
- School of Environmental Science and Engineering, Shandong University, 72 Binhai Road, Jimo District, Qingdao 266237, Shandong, PR China
| | - Shouqing Ni
- School of Environmental Science and Engineering, Shandong University, 72 Binhai Road, Jimo District, Qingdao 266237, Shandong, PR China
| | - Zhaojie Cui
- School of Environmental Science and Engineering, Shandong University, 72 Binhai Road, Jimo District, Qingdao 266237, Shandong, PR China.
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10
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Ali M, Song X, Ding D, Wang Q, Zhang Z, Tang Z. Bioremediation of PAHs and heavy metals co-contaminated soils: Challenges and enhancement strategies. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 295:118686. [PMID: 34920044 DOI: 10.1016/j.envpol.2021.118686] [Citation(s) in RCA: 68] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 11/20/2021] [Accepted: 12/12/2021] [Indexed: 06/14/2023]
Abstract
Systemic studies on the bioremediation of co-contaminated PAHs and heavy metals are lacking, and this paper provides an in-depth review on the topic. The released sources and transport of co-contaminated PAHs and heavy metals, including their co-occurrence through formation of cation-π interactions and their adsorption in soil are examined. Moreover, it is investigated that co-contamination of PAHs and heavy metals can drive a synergistic positive influence on bioremediation through enhanced secretion of extracellular polymeric substances (EPSs), production of biosynthetic genes, organic acid and enzymatic proliferation. However, PAHs molecular structure, PAHs-heavy metals bioavailability and their interactive cytotoxic effects on microorganisms can exert a challenging influence on the bioremediation under co-contaminated conditions. The fluctuations in bioavailability for microorganisms are associated with soil properties, chemical coordinative interactions, and biological activities under the co-contaminated PAHs-heavy metals conditions. The interactive cytotoxicity caused by the emergence of co-contaminants includes microbial cell disruption, denaturation of DNA and protein structure, and deregulation of antioxidant biological molecules. Finally, this paper presents the emerging strategies to overcome the bioavailability problems and recommends the use of biostimulation and bioaugmentation along with the microbial immobilization for enhanced bioremediation of PAHs-heavy metals co-contaminated sites. Better knowledge of the bioremediation potential is imperative to improve the use of these approaches for the sustainable and cost-effective remediation of PAHs and heavy metals co-contamination in the near future.
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Affiliation(s)
- Mukhtiar Ali
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xin Song
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Da Ding
- Nanjing Institute of Environmental Science, Ministry of Ecology and Environment of the People's Republic of China, Nanjing, 210042, China
| | - Qing Wang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China
| | - Zhuanxia Zhang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhiwen Tang
- Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, 210008, China; University of Chinese Academy of Sciences, Beijing, 100049, China
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Yang Y, Zhang ZW, Liu RX, Ju HY, Bian XK, Zhang WZ, Zhang CB, Yang T, Guo B, Xiao CL, Bai H, Lu WY. Research progress in bioremediation of petroleum pollution. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:46877-46893. [PMID: 34254241 DOI: 10.1007/s11356-021-15310-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Accepted: 07/01/2021] [Indexed: 06/13/2023]
Abstract
With the enhancement of environmental protection awareness, research on the bioremediation of petroleum hydrocarbon environmental pollution has intensified. Bioremediation has received more attention due to its high efficiency, environmentally friendly by-products, and low cost compared with the commonly used physical and chemical restoration methods. In recent years, bacterium engineered by systems biology strategies have achieved biodegrading of many types of petroleum pollutants. Those successful cases show that systems biology has great potential in strengthening petroleum pollutant degradation bacterium and accelerating bioremediation. Systems biology represented by metabolic engineering, enzyme engineering, omics technology, etc., developed rapidly in the twentieth century. Optimizing the metabolic network of petroleum hydrocarbon degrading bacterium could achieve more concise and precise bioremediation by metabolic engineering strategies; biocatalysts with more stable and excellent catalytic activity could accelerate the process of biodegradation by enzyme engineering; omics technology not only could provide more optional components for constructions of engineered bacterium, but also could obtain the structure and composition of the microbial community in polluted environments. Comprehensive microbial community information lays a certain theoretical foundation for the construction of artificial mixed microbial communities for bioremediation of petroleum pollution. This article reviews the application of systems biology in the enforce of petroleum hydrocarbon degradation bacteria and the construction of a hybrid-microbial degradation system. Then the challenges encountered in the process and the application prospects of bioremediation are discussed. Finally, we provide certain guidance for the bioremediation of petroleum hydrocarbon-polluted environment.
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Affiliation(s)
- Yong Yang
- School of Chemical Engineering and Technology, Tianjin University, No.135, Ya Guan Rd, Jinnan District, Tianjin, 300350, China
- CNOOC EnerTech-Safety & Environmental Protection Co., Tianwei Industrial Park, No. 75 Taihua Rd, TEDA, Tianjin, 300457, China
| | - Zhan-Wei Zhang
- School of Chemical Engineering and Technology, Tianjin University, No.135, Ya Guan Rd, Jinnan District, Tianjin, 300350, China
| | - Rui-Xia Liu
- School of Chemical Engineering and Technology, Tianjin University, No.135, Ya Guan Rd, Jinnan District, Tianjin, 300350, China
| | - Hai-Yan Ju
- School of Chemical Engineering and Technology, Tianjin University, No.135, Ya Guan Rd, Jinnan District, Tianjin, 300350, China
| | - Xue-Ke Bian
- School of Chemical Engineering and Technology, Tianjin University, No.135, Ya Guan Rd, Jinnan District, Tianjin, 300350, China
| | - Wan-Ze Zhang
- School of Chemical Engineering and Technology, Tianjin University, No.135, Ya Guan Rd, Jinnan District, Tianjin, 300350, China
| | - Chuan-Bo Zhang
- School of Chemical Engineering and Technology, Tianjin University, No.135, Ya Guan Rd, Jinnan District, Tianjin, 300350, China
| | - Ting Yang
- CNOOC EnerTech-Safety & Environmental Protection Co., Tianwei Industrial Park, No. 75 Taihua Rd, TEDA, Tianjin, 300457, China
| | - Bing Guo
- CNOOC EnerTech-Safety & Environmental Protection Co., Tianwei Industrial Park, No. 75 Taihua Rd, TEDA, Tianjin, 300457, China
| | - Chen-Lei Xiao
- CNOOC EnerTech-Safety & Environmental Protection Co., Tianwei Industrial Park, No. 75 Taihua Rd, TEDA, Tianjin, 300457, China
| | - He Bai
- China Offshore Environmental Service Ltd., Tianwei Industrial Park, No. 75 Taihua Rd, TEDA, Tianjin, 300457, China.
- Tianjin Huakan Environmental Protection Technology Co. Ltd., No. 67 Guangrui West Rd, Hedong District, Tianjin, 300170, China.
| | - Wen-Yu Lu
- School of Chemical Engineering and Technology, Tianjin University, No.135, Ya Guan Rd, Jinnan District, Tianjin, 300350, China.
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12
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Li M, Yin H, Zhu M, Yu Y, Lu G, Dang Z. Co-metabolic and biochar-promoted biodegradation of mixed PAHs by highly efficient microbial consortium QY1. J Environ Sci (China) 2021; 107:65-76. [PMID: 34412788 DOI: 10.1016/j.jes.2021.02.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Revised: 01/20/2021] [Accepted: 02/01/2021] [Indexed: 05/22/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs), typical representatives of the persistent organic pollutants (POPs), have become ubiquitous in the environment. In this study, a novel microbial consortium QY1 that performed outstanding PAHs-degrading capacity has been enriched. The degradation characteristics of single and mixed PAHs treated with QY1 were studied, and the effect of biochar on biodegradation of mixed PAHs and the potential of biochar in PAHs-heavy metal combined pollution bioremediation were also investigated. Results showed that, in single substrate system, QY1 degraded 94.5% of 500 mg/L phenanthrene (PHE) and 17.8% of 10 mg/L pyrene (PYR) after 7 days, while in PHE-PYR mixture system, the biodegradation efficiencies of PHE (500 mg/L) and PYR (10 mg/L) reached 94.0% and 96.2%, respectively, since PHE served as co-metabolic substrate to have significantly improved PYR biodegradation. Notably, with the cooperation of biochar, the biodegradations of PHE and PYR were greatly accelerated. Further, biochar could reduce the adverse impact of heavy metals (Cd2+, Cu2+, Cr2O72-) on PYR biodegradation remarkably. The sequencing analysis revealed that Methylobacterium, Burkholderia and Stenotrophomonas were the dominant genera of QY1 in almost all treatments, indicating that these genera might play key roles in PAHs biodegradation. Overall, this study provided new insights into the efficient bioremediation of PAHs-contaminated site.
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Affiliation(s)
- Min Li
- Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, School of Environment and Energy, South China University of Technology, Guangdong 510006, China
| | - Hua Yin
- Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, School of Environment and Energy, South China University of Technology, Guangdong 510006, China.
| | - Minghan Zhu
- Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, School of Environment and Energy, South China University of Technology, Guangdong 510006, China
| | - Yuanyuan Yu
- Guangdong Provincial Key Laboratory of Petrochemical Pollution Processes and Control, School of Environmental Science and Engineering, Guangdong University of Petrochemical Technology, Guangdong 525000, China
| | - Guining Lu
- Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, School of Environment and Energy, South China University of Technology, Guangdong 510006, China
| | - Zhi Dang
- Key Laboratory of Ministry of Education on Pollution Control and Ecosystem Restoration in Industry Clusters, School of Environment and Energy, South China University of Technology, Guangdong 510006, China
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Ghorbannezhad H, Moghimi H, Dastgheib SMM. Evaluation of pyrene and tetracosane degradation by mixed-cultures of fungi and bacteria. JOURNAL OF HAZARDOUS MATERIALS 2021; 416:126202. [PMID: 34492965 DOI: 10.1016/j.jhazmat.2021.126202] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Revised: 05/19/2021] [Accepted: 05/19/2021] [Indexed: 06/13/2023]
Abstract
The present study was conducted to compare the efficiency of different microbial mixed-cultures consists of fifteen oil-degrading microorganisms with different combinations. The investigation was targeted toward the removal of 500 mg/l pyrene and 1% w/v tetracosane, as single compounds or mixture. Sequential Fungal-Bacterial Mixed-Culture (SMC) in which bacteria added one week after fungi, recorded 60.76% and 73.48% degradation for pyrene and tetracosane; about 10% more than Traditional Fungal-Bacterial Mixed-Culture (TMC). Co-degradation of pollutants resulted in 24.65% more pyrene degradation and 6.41% less tetracosane degradation. The non-specified external enzymes of fungi are responsible for initial attacks on hydrocarbons. Delayed addition of bacteria and co-contamination would result in higher growth of fungi which increases pyrene degradation. The addition of Rhamnolipid potently increased the extent of pyrene and tetracosane degradation by approximately 16% and 23% and showed twice better performance than Tween-80 in 20 times less concentration. The results indicated the importance of having sufficient knowledge on the characteristics of the contaminated site and its contaminants as well as oil-degrading species. Gaining this knowledge and using it properly, such as the later addition of bacteria (new method of mixed-cultures inoculation) to the contaminated culture, can serve as a promising approach.
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Affiliation(s)
- Hassan Ghorbannezhad
- Department of Microbial Biotechnology, School of Biology, College of Science, University of Tehran, Tehran, Iran.
| | - Hamid Moghimi
- Department of Microbial Biotechnology, School of Biology, College of Science, University of Tehran, Tehran, Iran.
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Al Farraj DA, Alkufeidy RM, Alkubaisi NA, Alshammari MK. Polynuclear aromatic anthracene biodegradation by psychrophilic Sphingomonas sp., cultivated with tween-80. CHEMOSPHERE 2021; 263:128115. [PMID: 33297108 DOI: 10.1016/j.chemosphere.2020.128115] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 08/09/2020] [Accepted: 08/22/2020] [Indexed: 06/12/2023]
Abstract
Anthracene is a low molecular weight polynuclear aromatic hydrocarbons (PAHs) being identified as a precedence toxic contaminant in the ecosystem. Thus, the present work was designed to evaluate anthracene biodegradation efficiency by selected marine bacteria. From the marine isolates, the most effective anthracene biodegrading strain was identified as Sphingomonas sp., KSU05. Time course batch growth results indicated that the isolate KSU05 was capable of surviving up to 500 mg/L of anthracene. The influence of various nutrient sources were screened for enhanced growth and pyrene degradation, based on results glucose and tween-80 were used for further optimization studies. Batch experimental analysis showed maximum biodegradation (70.5%) of anthracene (50 mg/L) with enhanced survival of Sphingomonas sp. KSU05 was observed at 96 h of cultivation. Box-Behnken design optimization results showed that the culture conditions enhanced the anthracene biodegradation (90.0%) at pH 7.0, 0.3 mM of tween-80 concentration, and 5.5% of glucose concentration. In addition, the isolate Sphingomonas sp. KSU05 was found to rapidly degrade anthracene within 96 h. The anthracene intermediates was analyzed using Gas chromatography mass spectrophotometer (GC-MS). Overall, this research shown that the Sphingomonas sp., cultivated with suggested optimum conditions could provide an effective prospective for the degradation of anthracene from contaminated environment.
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Affiliation(s)
- Dunia A Al Farraj
- Department of Botany and Microbiology, College of Sciences, King Saud University, P.O. Box 22452, Riyadh, 11495, Saudi Arabia.
| | - Roua M Alkufeidy
- Department of Botany and Microbiology, College of Sciences, King Saud University, P.O. Box 22452, Riyadh, 11495, Saudi Arabia
| | - Noorah A Alkubaisi
- Department of Botany and Microbiology, College of Sciences, King Saud University, P.O. Box 22452, Riyadh, 11495, Saudi Arabia
| | - Maryam K Alshammari
- Department of Botany and Microbiology, College of Sciences, King Saud University, P.O. Box 22452, Riyadh, 11495, Saudi Arabia
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Multispecies Diesel Fuel Biodegradation and Niche Formation Are Ignited by Pioneer Hydrocarbon-Utilizing Proteobacteria in a Soil Bacterial Consortium. Appl Environ Microbiol 2020; 87:AEM.02268-20. [PMID: 33067200 DOI: 10.1128/aem.02268-20] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 10/12/2020] [Indexed: 11/20/2022] Open
Abstract
A soil bacterial consortium that was grown on diesel fuel and consisted of more than 10 members from different genera was maintained through repetitive subculturing and was utilized as a practical model to investigate a bacterial community that was continuously exposed to petroleum hydrocarbons. Through metagenomics analyses, consortium member isolation, growth assays, and metabolite identification which supported the linkage of genomic data and functionality, two pioneering genera, Sphingobium and Pseudomonas, whose catabolic capabilities were differentiated, were found to be responsible for the creation of specialized ecological niches that were apparently occupied by other bacterial members for survival within the consortium. Coexisting genera Achromobacter and Cupriavidus maintained their existence in the consortium through metabolic dependencies by utilizing hydrocarbon biotransformation products of pioneer metabolism, which was confirmed through growth tests and identification of biotransformation products of the isolated strains. Pioneering Sphingobium and Pseudomonas spp. utilized relatively water-insoluble hydrocarbon parent compounds and facilitated the development of a consortium community structure that resulted in the creation of niches in response to diesel fuel exposure which were created through the production of more-water-soluble biotransformation products available to cocolonizers. That these and other organisms were still present in the consortium after multiple transfers spanning 15 years provided evidence for these ecological niches. Member survival through occupation of these niches led to robustness of each group within the multispecies bacterial community. Overall, these results contribute to our understanding of the complex ecological relationships that may evolve during prokaryotic hydrocarbon pollutant biodegradation.IMPORTANCE There are few metagenome studies that have explored soil consortia maintained on a complex hydrocarbon substrate after the community interrelationships were formed. A soil bacterial consortium maintained on diesel fuel was utilized as a practical model to investigate bacterial community relationships through metagenomics analyses, consortium member isolation, growth assays, and metabolite identification, which supported the linkage of genomic data and functionality. Two pioneering genera were responsible for the biodegradation of aromatics and alkanes by initiating biotransformation and thereby created specialized niches that were populated by other members. A model that represents these relationships was constructed, which contributes to our understanding of the complex ecological relationships that evolve during prokaryotic hydrocarbon pollutant biodegradation.
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16
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Hamid H, Li LY, Grace JR. Effect of substrate concentrations on aerobic biotransformation of 6:2 fluorotelomer sulfonate (6:2 FTS) in landfill leachate. CHEMOSPHERE 2020; 261:128108. [PMID: 33113640 DOI: 10.1016/j.chemosphere.2020.128108] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2020] [Revised: 08/05/2020] [Accepted: 08/20/2020] [Indexed: 06/11/2023]
Abstract
Biotransformation of 6:2 fluorotelomer sulfonate (FTS) results in the formation of short-chain (C4 - C6) perfluorocarboxylic acids (PFCAs) in landfill leachate. Although leachate substrate concentrations (i.e., organic carbon, ammonia) vary widely, their effects on 6:2 FTS biotransformation and PFCAs formation are unknown. This study investigated the effect of organic carbon and ammonia concentration in 6:2 FTS aerobic biotransformation and PFCA formation in leachate. Biotransformation experiments were conducted with sediment collected from a landfill leachate ditch, to which deionized (DI) water and various amounts of leachate were added. Microbial community analysis using 16S rRNA indicated that while phylum Proteobacteria dominated the bacterial composition throughout the 60 days, Actinobacteria increased with time. Many genera from Proteobacteria and Actinobacteria can synthesize a wide array of enzymes, indicating that these phyla are likely to play an important role in 6:2 FTS biotransformation. Higher biotransformation of 6:2 FTS was observed in leachate-added microcosms (∼21%), compared to DI water microcosm (∼14%), likely reflecting the substrate dependency of 6:2 FTS biotransformation. Substrate limiting conditions in DI water microcosm resulted in slightly greater formation of ∑(C4 - C6) PFCAs (∼14 mol%), compared with leachate added microcosms (10-13 mol%). The findings suggest that dilution of landfill leachate, (e.g., during wet seasons), likely results in reduced 6:2 FTS biotransformation and increased PFCAs formation compared to dry conditions. Observed formation of C7 - C8 PFCAs in the live microcosms suggested that landfills act as secondary sources of legacy PFCAs (e.g., perfluorooctanoic acid) in the environment.
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Affiliation(s)
- Hanna Hamid
- Civil Engineering, University of British Columbia, 6250 Applied Science Lane, Vancouver, BC, V6T 1Z4, Canada
| | - Loretta Y Li
- Civil Engineering, University of British Columbia, 6250 Applied Science Lane, Vancouver, BC, V6T 1Z4, Canada.
| | - John R Grace
- Chemical and Biological Engineering, University of British Columbia, 2360 East Mall, Vancouver, BC, V6T 1Z3, Canada
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Zhao C, Shang D, Zou Y, Du Y, Wang Q, Xu F, Ren L, Kong Q. Changes in electricity production and microbial community evolution in constructed wetland-microbial fuel cell exposed to wastewater containing Pb(II). THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 732:139127. [PMID: 32438162 DOI: 10.1016/j.scitotenv.2020.139127] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 04/01/2020] [Accepted: 04/28/2020] [Indexed: 06/11/2023]
Abstract
Two constructed wetland microbial fuel cell (CW-MFC) devices, experimental group (EG, with 5 mg/L Pb(II) addition) and control group (CG) were built to explore the changes in power generation, wastewater purification and microbial community structure under Pb(II) stress. The voltage of EG (343.16 ± 12.14 mV) was significantly higher (p < 0.01) than that of CG (295.49 ± 13.91 mV), and the highest power density of the EG and CG were 7.432 mW·m-2 and 3.873 mW·m-2, respectively. There was no significant difference in the removal of common pollutants between these groups except for the NH4+-N removal efficiency, which was probably caused by the inhibition of the bioactivity of Comamonas (AOB) in the anode of the experimental group by Pb(II). Pb(II) was effectively removed by CW-MFC (84.86 ± 3%), and the abundant amount of fulvic acid-like matter in the extracellular polymeric substance (EPS) of the EG contributed to its removal. The presence of Pb(II) had a negative effect on both microbial community diversity and species richness. The abundance of a lead resistance gene, pbrT, decreased with long-term Pb(II) pressure. This is evidence of microbial adaptation to Pb(II).
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Affiliation(s)
- CongCong Zhao
- College of Geography and Environment, Collaborative Innovation Center of Human-Nature and Green Development in Universities of Shandong, Shandong Normal University, Jinan 250014, PR China
| | - DaWei Shang
- College of Geography and Environment, Collaborative Innovation Center of Human-Nature and Green Development in Universities of Shandong, Shandong Normal University, Jinan 250014, PR China; Institute of Environment and Ecology, Shandong Normal University, Jinan 255014, PR China
| | - YanLing Zou
- College of Geography and Environment, Collaborative Innovation Center of Human-Nature and Green Development in Universities of Shandong, Shandong Normal University, Jinan 250014, PR China; Institute of Environment and Ecology, Shandong Normal University, Jinan 255014, PR China
| | - YuanDa Du
- College of Geography and Environment, Collaborative Innovation Center of Human-Nature and Green Development in Universities of Shandong, Shandong Normal University, Jinan 250014, PR China
| | - Qian Wang
- College of Geography and Environment, Collaborative Innovation Center of Human-Nature and Green Development in Universities of Shandong, Shandong Normal University, Jinan 250014, PR China
| | - Fei Xu
- College of Geography and Environment, Collaborative Innovation Center of Human-Nature and Green Development in Universities of Shandong, Shandong Normal University, Jinan 250014, PR China
| | - Liang Ren
- Jiangsu CRRC Environment CO. LTD, Jiangsu Province 215557, China
| | - Qiang Kong
- College of Geography and Environment, Collaborative Innovation Center of Human-Nature and Green Development in Universities of Shandong, Shandong Normal University, Jinan 250014, PR China; Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576, Singapore.
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Biomimetic oxidation of benzo[a]pyrene to a quinone metabolite as a cysteine-oxidation mediator on MWCNT-modified electrode surface. Electrochim Acta 2020. [DOI: 10.1016/j.electacta.2020.136367] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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19
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Ibrar M, Zhang H. Construction of a hydrocarbon-degrading consortium and characterization of two new lipopeptides biosurfactants. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 714:136400. [PMID: 31982734 DOI: 10.1016/j.scitotenv.2019.136400] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2019] [Revised: 12/13/2019] [Accepted: 12/27/2019] [Indexed: 06/10/2023]
Abstract
Apparent solubility and bioavailability of hydrophobic compounds are the major problems in the bioremediation process, which could be overcome by the bacteria capable of biosurfactant production and concurrent hydrocarbon degradation. In this work, we constructed an artificial bacterial consortium containing Lysinibacillus, Paenibacillus, Gordonia and Cupriavidus spp. from glyceryl tributyrate enriched bacteria collected from the non-contaminated site. The consortium was capable of using common raw materials (olive oil, paraffin oil, and glycerol) and polyaromatic hydrocarbons pollutants (naphthalene and anthracene) as the sole carbon source with simultaneous biosurfactant production. Two new lipopeptide isoforms, containing heptapeptide and lipid moieties, were structurally elucidated by LC-MS/MS, FTIR, NMR and molecular networking analysis. Our findings indicate that hydrocarbons degradation and biosurfactant production is an intrinsic property of non-contaminated soil community. Interestingly, we observed the hyper chemotactic activity of Lysinibacillus strains towards glyceryl tributyrate, which has not been reported before. The study may deepen our understanding of microbial strains and consortium with the potential to be used for bioremediation of hydrocarbons contaminated environments.
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Affiliation(s)
- Muhammad Ibrar
- Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, Hubei, PR China; Key Laboratory of Molecular Biophysics, Ministry of education, Wuhan, Hubei, PR China
| | - Houjin Zhang
- Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, Hubei, PR China; Key Laboratory of Molecular Biophysics, Ministry of education, Wuhan, Hubei, PR China.
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20
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Govarthanan M, Khalifa AY, Kamala-Kannan S, Srinivasan P, Selvankumar T, Selvam K, Kim W. Significance of allochthonous brackish water Halomonas sp. on biodegradation of low and high molecular weight polycyclic aromatic hydrocarbons. CHEMOSPHERE 2020; 243:125389. [PMID: 31765893 DOI: 10.1016/j.chemosphere.2019.125389] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 11/11/2019] [Accepted: 11/14/2019] [Indexed: 06/10/2023]
Abstract
The present study is aimed to isolate and identify polycyclic aromatic hydrocarbons (PAHs) degrading bacteria from brackish water and to assess the biodegradation efficiency against low and high molecular weight PAHs. Among 15 isolates, the isolate designated as RM effectively degraded 100 mg/L of phenanthrene (Phe) (67.0%), pyrene (Pyr) (63.0%), naphthalene (NaP) (60.0%), and benzo [a]pyrene (BaP) (58.0%) after 7 days of incubation. Carbon sources, pH, and salinity of the culture medium were optimized to enhance the growth and PAHs biodegradation of the isolate RM. Sucrose was found to be an excellent carbon source to enhance PAHs biodegradation (Phe, 75.0; Pyr, 68.5; NaP, 62.5; and BaP, 59.5%). Furthermore, the isolate showed enhanced degradation at pH 7.0 and 4% salinity. The isolate RM was identified as Halomonas sp. based on partial 16S rDNA gene sequence analysis. The results indicated that the isolate RM (i.e., Halomonas sp.) has the potential to be used in remediation of oil spills in the marine ecosystem.
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Affiliation(s)
- M Govarthanan
- Department of Environmental Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea.
| | - Ashraf Yz Khalifa
- Biological Sciences Department, College of Science, King Faisal University, Saudi Arabia; Botany and Microbiology Department, Faculty of Science, University of Beni-Suef, Beni-Suef, Egypt
| | - S Kamala-Kannan
- Division of Biotechnology, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, 54596, Republic of Korea
| | - P Srinivasan
- PG& Research Department of Biotechnology, Mahendra Arts and Science College (Autonomous), Kalippatti, Namakkal, 637501, Tamil Nadu, India
| | - T Selvankumar
- PG& Research Department of Biotechnology, Mahendra Arts and Science College (Autonomous), Kalippatti, Namakkal, 637501, Tamil Nadu, India
| | - K Selvam
- PG& Research Department of Biotechnology, Mahendra Arts and Science College (Autonomous), Kalippatti, Namakkal, 637501, Tamil Nadu, India
| | - Woong Kim
- Department of Environmental Engineering, Kyungpook National University, Daegu, 41566, Republic of Korea.
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Gupta B, Puri S, Thakur IS, Kaur J. Comparative evaluation of growth kinetics for pyrene degradation by Acinetobacter pittii NFL and Enterobacter cloacae BT in the presence of biosurfactant. ACTA ACUST UNITED AC 2020. [DOI: 10.1016/j.biteb.2019.100369] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Ji D, Mao Z, He J, Peng S, Wen H. Characterization and genomic function analysis of phenanthrene-degrading bacterium Pseudomonas sp. Lphe-2. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2020; 55:549-562. [PMID: 31913782 DOI: 10.1080/10934529.2019.1711352] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 12/24/2019] [Accepted: 12/28/2019] [Indexed: 06/10/2023]
Abstract
A stain of Pseudomonas sp. Lphe-2, which could degrade phenanthrene as the main carbon and energy source, was isolated from the aerobic sludge of a coking plant. Then its biodegradation characteristics, whole genome sequence and biodegradation pathway were examined. The Lphe-2 strain exhibited broad-spectrum degradation activities for various polycyclic aromatic hydrocarbons (PAHs), including naphthalene (NAP), phenanthrene (PHE), and pyrene (PYR). Under the optimal conditions, the degradation efficiency of phenanthrene (100 mg/L) is 92.76% on the 7th day, and 2-carboxybenzaldehyde and 1-hydroxy-2-naphthoic acid are the major metabolites found in phenanthrene metabolism. Genomic analysis of Pseudomonas sp. Lphe-2 showed that a total of 3879 genes from the Lphe-2 strain were annotated based on the COG classification, and the genomic information was annotated to 185 metabolic pathways. Based on the intermediate metabolites detected by Gas Chromatography-Mass Spectrometer (GC-MS) and all potential phenanthrene-degrading genes identified by BLAST search, a phenanthrene biodegradation pathway of Lphe-2 strain was proposed. These results suggested that Lphe-2 strain has a good prospect in the bioremediation of PAHs pollution.
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Affiliation(s)
- Dan Ji
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, Jiangsu, China
| | - Zhen Mao
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, Jiangsu, China
| | - Jian He
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, Jiangsu, China
| | - Sihan Peng
- School of Environment Science and Spatial Informatics, China University of Mining and Technology, Xuzhou, Jiangsu, China
| | - Hongyu Wen
- School of life Sciences, Jiangsu Normal University, Xuzhou, China
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Lemmel F, Maunoury-Danger F, Leyval C, Cébron A. DNA stable isotope probing reveals contrasted activity and phenanthrene-degrading bacteria identity in a gradient of anthropized soils. FEMS Microbiol Ecol 2019; 95:5626340. [PMID: 31730156 DOI: 10.1093/femsec/fiz181] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Accepted: 11/13/2019] [Indexed: 11/13/2022] Open
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are ubiquitous soil organic pollutants. Although PAH-degrading bacteria are present in almost all soils, their selection and enrichment have been shown in historically high PAH contaminated soils. We can wonder if the effectiveness of PAH biodegradation and the PAH-degrading bacterial diversity differ among soils. The stable isotope probing (SIP) technique with 13C-phenanthrene (PHE) as a model PAH was used to: (i) compare for the first time a range of 10 soils with various PAH contamination levels, (ii) determine their PHE-degradation efficiency and (iii) identify the active PHE-degraders using 16S rRNA gene amplicon sequencing from 13C-labeled DNA. Surprisingly, the PHE degradation rate was not directly correlated to the initial level of total PAHs and phenanthrene in the soils, but was mostly explained by the initial abundance and richness of soil bacterial communities. A large diversity of PAH-degrading bacteria was identified for seven of the soils, with differences among soils. In the soils where the PHE degradation activities were the higher, Mycobacterium species were always the dominant active PHE degraders. A positive correlation between PHE-degradation level and the diversity of active PHE-degraders (Shannon index) supported the hypothesis that cooperation between strains led to a more efficient PAH degradation.
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Affiliation(s)
- Florian Lemmel
- Université de Lorraine, CNRS, LIEC UMR7360, Faculté des Sciences et Technologies, Bd des Aiguillettes, BP70239, 54506 Vandoeuvre-les-Nancy, France
| | - Florence Maunoury-Danger
- Université de Lorraine, CNRS, LIEC UMR7360, Campus Bridoux, Avenue du général Delestraint, 57070 Metz, France
| | - Corinne Leyval
- Université de Lorraine, CNRS, LIEC UMR7360, Faculté des Sciences et Technologies, Bd des Aiguillettes, BP70239, 54506 Vandoeuvre-les-Nancy, France
| | - Aurélie Cébron
- Université de Lorraine, CNRS, LIEC UMR7360, Faculté des Sciences et Technologies, Bd des Aiguillettes, BP70239, 54506 Vandoeuvre-les-Nancy, France
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Zheng MM, Wang C, Li WX, Song WF, Shen RF. Soil Nutrients Drive Function and Composition of phoC-Harboring Bacterial Community in Acidic Soils of Southern China. Front Microbiol 2019; 10:2654. [PMID: 31824452 PMCID: PMC6879426 DOI: 10.3389/fmicb.2019.02654] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Accepted: 10/31/2019] [Indexed: 01/30/2023] Open
Abstract
Phosphorus (P) deficiency is an important factor that limits the agricultural production potential in acidic soils. The bacterial phoC gene encodes non-specific acid phosphatase (ACP), which participates in the mineralization of soil organic P and is therefore important for the improvement of soil P availability. However, the function and community population of phoC-harboring bacteria and their driving factors in acidic soil remain largely unknown. For this study, 51 soil samples and 207 plant samples were collected from four locations in the acidic soil region of southern China. Quantitative PCR and high-throughput sequencing were employed to analyze abundance and community composition of phoC-harboring bacteria. The results showed that soil P availability was the important nutrient element limiting the growth of both plants and soil bacteria. Soil ACP activity was clearly higher than alkaline phosphatase, indicating the important effect of phoC-harboring bacteria in acidic soils. ACP activity and phoC gene abundance showed a significant positive correlation, and both were closely related to soil available P, total carbon, and total nitrogen. The dominant genera of phoC-harboring bacteria involved Cupriavidus, Stenotrophomonas, and Xanthomonas. Compared to land-use pattern, sampling location, and soil parent material, soil property played a more important role in affecting phoC-harboring bacterial community structure, where N-related variables including soil NO 3 - -N, NH 4 + -N, and C/N ratio appeared to be the main factors. These findings suggest that phoC-harboring bacteria should provide an important contribution to soil P availability in acidic soil, and its function and community composition were strongly associated with soil nutrients.
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Affiliation(s)
- Man Man Zheng
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Chao Wang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
| | - Wen Xing Li
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Wen Feng Song
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China
| | - Ren Fang Shen
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing, China.,University of Chinese Academy of Sciences, Beijing, China
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Chen S, Ma Z, Li S, Waigi MG, Jiang J, Liu J, Ling W. Colonization of polycyclic aromatic hydrocarbon-degrading bacteria on roots reduces the risk of PAH contamination in vegetables. ENVIRONMENT INTERNATIONAL 2019; 132:105081. [PMID: 31404844 DOI: 10.1016/j.envint.2019.105081] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Revised: 07/31/2019] [Accepted: 08/01/2019] [Indexed: 06/10/2023]
Abstract
This is a primary investigation on the mitigation of polycyclic aromatic hydrocarbon (phenanthrene as a model PAH) contamination in vegetables including water spinach (Ipomoea aquatica Forsk), pakchoi (Brassica campestris) and Chinese cabbage (Brassica chinensis) using a gfp-labeled PAH-degrading bacterium (RS1-gfp). Effective root colonization led to dense RS1-gfp populations inhabiting the rhizosphere and endosphere of the vegetables, which subsequently led to a reduction in phenanthrene accumulation and risk in vegetables. When compared with the controls without RS1-gfp, the amount of phenanthrene accumulation due to strain RS1-gfp colonization reduced by up to ~93.7% in roots and ~75.2% in shoots of vegetables, respectively. The estimated incremental lifetime cancer risk (ILCR) for adults due to phenanthrene in vegetables was reduced by 24.6%-48% through RS1-gfp inoculation. The proposed method was developed to circumvent the risk of phenanthrene contamination in vegetables by inoculating PAH-degrading bacteria. The findings provide an in-depth understanding of PAH detoxification in agricultural plants grown on contaminated sites by exploiting bacteria like RS1-gfp, which portray both rhizo- and endophytic lifestyles.
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Affiliation(s)
- Shuang Chen
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Zhao Ma
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Shunyao Li
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Michael Gatheru Waigi
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Jiandong Jiang
- Department of Microbiology, Key Lab of Environmental Microbiology for Agriculture, Ministry of Agriculture, College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Juan Liu
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Wanting Ling
- Institute of Organic Contaminant Control and Soil Remediation, College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China.
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Liu XX, Hu X, Cao Y, Pang WJ, Huang JY, Guo P, Huang L. Biodegradation of Phenanthrene and Heavy Metal Removal by Acid-Tolerant Burkholderia fungorum FM-2. Front Microbiol 2019; 10:408. [PMID: 30930861 PMCID: PMC6427951 DOI: 10.3389/fmicb.2019.00408] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 02/18/2019] [Indexed: 11/13/2022] Open
Abstract
Phenanthrene (PHE) is a common pollutant of acidic and non-acidic environments that is recalcitrant to biodegradation. Herein, Burkholderia fungorum FM-2 (GenBank accession no. KM263605) was isolated from oil-contaminated soil in Xinjiang and characterized morphologically, physiologically, and phylogenetically. Environmental parameters including PHE concentration, pH, temperature, and salinity were optimized, and heavy metal tolerance was investigated. The MIC of strain FM-2 tolerant to Pb(II) and Cd(II) was 50 and 400 mg L−1, respectively, while the MIC of Zn(II) was >1,200 mg L−1. Atypically for a B. fungorum strain, FM-2 utilized PHE (300 mg L−1) as a sole carbon source over a wide pH range (between pH 3 and 9). PHE and heavy metal metabolism were assessed using gas chromatography (GC), inductively coupled plasma optical emission spectroscopy (ICP-OES), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS), Fourier-transform infrared (FTIR) spectroscopy and ultraviolet (UV) absorption spectrometry. The effects of heavy metals on the bioremediation of PHE in soil were investigated, and the findings suggest that FM-2 has potential for combined bioremediation of soils co-contaminated with PHE and heavy metals.
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Affiliation(s)
- Xin-Xin Liu
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, College of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, China
| | - Xin Hu
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, College of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, China
| | - Yue Cao
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, College of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, China
| | - Wen-Jing Pang
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, College of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, China
| | - Jin-Yu Huang
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, College of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, China
| | - Peng Guo
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, College of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, China
| | - Lei Huang
- Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion, College of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin, China
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27
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Kamyabi A, Nouri H, Moghimi H. Characterization of pyrene degradation and metabolite identification by Basidioascus persicus and mineralization enhancement with bacterial-yeast co-culture. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 163:471-477. [PMID: 30075450 DOI: 10.1016/j.ecoenv.2018.07.098] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 07/18/2018] [Accepted: 07/24/2018] [Indexed: 06/08/2023]
Abstract
In this paper, we introduce pyrene degrader halotolerant yeast, Basidioascus persicus EBL-C16 and characterize its growth in different salt concentrations. Investigation of the removal of different concentrations of pyrene showed that B. persicus EBL-C16 was able to eliminate 50-90% of pyrene in the presence of 2.5% salt and also mineralize phenanthrene and anthracene. Growth and depletion kinetics of 500 mg L-1 of pyrene removal revealed 79% degradation and the growth rate reached 1.4 g L-1 of dry weight, decomposition constant rate was obtained as 0.074 day-1 and the half-life was 9.33 days. When minimal medium was replaced with Persian Gulf water, 48% increase in pyrene removal was detected by yeast strain. The mass spectrometry of the treated samples specified the phthalic acid pathway as the metabolic pathway of pyrene degradation by B. persicus. Study of the synergistic effect of using rhamnolipid and co-culture of yeast with Pseudomonas putida ATCC 12633 revealed that the combination of both of them with B. persicus increased 21% pyrene elimination. The findings of this study can be used to comprehend the mechanisms of oil hydrocarbon degradation by yeasts. Furthermore, the results demonstrated the promising potential of yeast-bacteria co-culture for cleaning of oil spills in marine and saline soil contaminated areas.
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Affiliation(s)
- A Kamyabi
- Department of Microbial Biotechnology, School of Biology, College of Science, University of Tehran, Tehran, Iran
| | - H Nouri
- Department of Microbial Biotechnology, School of Biology, College of Science, University of Tehran, Tehran, Iran
| | - H Moghimi
- Department of Microbial Biotechnology, School of Biology, College of Science, University of Tehran, Tehran, Iran.
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28
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Jiang L, Luo C, Zhang D, Song M, Sun Y, Zhang G. Biphenyl-Metabolizing Microbial Community and a Functional Operon Revealed in E-Waste-Contaminated Soil. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:8558-8567. [PMID: 29733586 DOI: 10.1021/acs.est.7b06647] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Primitive electronic waste (e-waste) recycling activities release massive amounts of persistent organic pollutants (POPs) and heavy metals into surrounding soils, posing a major threat to the ecosystem and human health. Microbes capable of metabolizing POPs play important roles in POPs remediation in soils, but their phylotypes and functions remain unclear. Polychlorinated biphenyls (PCBs), one of the main pollutants in e-waste contaminated soils, have drawn increasing attention due to their high persistence, toxicity, and bioaccumulation. In the present study, we employed the culture-independent method of DNA stable-isotope probing to identify active biphenyl and PCB degraders in e-waste-contaminated soil. A total of 19 rare operational taxonomic units and three dominant bacterial genera ( Ralstonia, Cupriavidus, and uncultured bacterium DA101) were enriched in the 13C heavy DNA fraction, confirming their functions in PCBs metabolism. Additionally, a 13.8 kb bph operon was amplified, containing a bphA gene labeled by 13C that was concentrated in the heavy DNA fraction. The tetranucleotide signature characteristics of the bph operon suggest that it originated from Ralstonia. The bph operon may be shared by horizontal gene transfer because it contains a transposon gene and is found in various bacterial species. This study gives us a deeper understanding of PCB-degrading mechanisms and provides a potential resource for the bioremediation of PCBs-contaminated soils.
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Affiliation(s)
- Longfei Jiang
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences , Guangzhou 510640 , China
| | - Chunling Luo
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences , Guangzhou 510640 , China
- College of Natural Resources and Environment , South China Agricultural University , Guangzhou 510642 , China
| | - Dayi Zhang
- School of Environment , Tsinghua University , Beijing 100084 , China
| | - Mengke Song
- College of Natural Resources and Environment , South China Agricultural University , Guangzhou 510642 , China
| | - Yingtao Sun
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences , Guangzhou 510640 , China
| | - Gan Zhang
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences , Guangzhou 510640 , China
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29
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diCenzo GC, Debiec K, Krzysztoforski J, Uhrynowski W, Mengoni A, Fagorzi C, Gorecki A, Dziewit L, Bajda T, Rzepa G, Drewniak L. Genomic and Biotechnological Characterization of the Heavy-Metal Resistant, Arsenic-Oxidizing Bacterium Ensifer sp. M14. Genes (Basel) 2018; 9:E379. [PMID: 30060533 PMCID: PMC6115938 DOI: 10.3390/genes9080379] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 07/22/2018] [Accepted: 07/25/2018] [Indexed: 12/23/2022] Open
Abstract
Ensifer (Sinorhizobium) sp. M14 is an efficient arsenic-oxidizing bacterium (AOB) that displays high resistance to numerous metals and various stressors. Here, we report the draft genome sequence and genome-guided characterization of Ensifer sp. M14, and we describe a pilot-scale installation applying the M14 strain for remediation of arsenic-contaminated waters. The M14 genome contains 6874 protein coding sequences, including hundreds not found in related strains. Nearly all unique genes that are associated with metal resistance and arsenic oxidation are localized within the pSinA and pSinB megaplasmids. Comparative genomics revealed that multiple copies of high-affinity phosphate transport systems are common in AOBs, possibly as an As-resistance mechanism. Genome and antibiotic sensitivity analyses further suggested that the use of Ensifer sp. M14 in biotechnology does not pose serious biosafety risks. Therefore, a novel two-stage installation for remediation of arsenic-contaminated waters was developed. It consists of a microbiological module, where M14 oxidizes As(III) to As(V) ion, followed by an adsorption module for As(V) removal using granulated bog iron ores. During a 40-day pilot-scale test in an abandoned gold mine in Zloty Stok (Poland), water leaving the microbiological module generally contained trace amounts of As(III), and dramatic decreases in total arsenic concentrations were observed after passage through the adsorption module. These results demonstrate the usefulness of Ensifer sp. M14 in arsenic removal performed in environmental settings.
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Affiliation(s)
- George C diCenzo
- Laboratory of Microbial Genetics, Department of Biology, University of Florence, via Madonna del Piano 6, 50019 Sesto Fiorentino, Italy.
| | - Klaudia Debiec
- Laboratory of Environmental Pollution Analysis, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland.
| | - Jan Krzysztoforski
- Faculty of Chemical and Process Engineering, Warsaw University of Technology, Warynskiego 1, 00-645 Warsaw, Poland.
| | - Witold Uhrynowski
- Laboratory of Environmental Pollution Analysis, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland.
| | - Alessio Mengoni
- Laboratory of Microbial Genetics, Department of Biology, University of Florence, via Madonna del Piano 6, 50019 Sesto Fiorentino, Italy.
| | - Camilla Fagorzi
- Laboratory of Microbial Genetics, Department of Biology, University of Florence, via Madonna del Piano 6, 50019 Sesto Fiorentino, Italy.
| | - Adrian Gorecki
- Department of Bacterial Genetics, Institute of Microbiology, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland.
| | - Lukasz Dziewit
- Department of Bacterial Genetics, Institute of Microbiology, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland.
| | - Tomasz Bajda
- Department of Mineralogy, Petrography and Geochemistry, Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, Poland.
| | - Grzegorz Rzepa
- Department of Mineralogy, Petrography and Geochemistry, Faculty of Geology, Geophysics and Environmental Protection, AGH University of Science and Technology, Mickiewicza 30, 30-059 Krakow, Poland.
| | - Lukasz Drewniak
- Laboratory of Environmental Pollution Analysis, Faculty of Biology, University of Warsaw, Miecznikowa 1, 02-096 Warsaw, Poland.
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Xi Y, Song Y, Johnson DM, Li M, Liu H, Huang Y. Se enhanced phytoremediation of diesel in soil by Trifolium repens. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 154:137-144. [PMID: 29459163 DOI: 10.1016/j.ecoenv.2018.01.061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2017] [Revised: 01/26/2018] [Accepted: 01/29/2018] [Indexed: 05/16/2023]
Abstract
A pot-culture experiment was conducted to assess the effects of selenium (Se) (0.5 mg kg-1) on Trifolium repens exposed to various levels of diesel (0, 15, 20, 25 g kg-1) for 30 days and 60 days. Exposure to diesel for 60 day led to concentration-dependent decreases in root morphogenesis, chlorophyll content and CAT activity, and to dose-dependent increases in MDA content and SOD activity. The residual diesel concentration in soil increased and the removal efficiency decreased with soil diesel concentration. The chlorophyll content and residual diesel concentration after were slightly higher at 30 days than at 60days. Application of Se to soil increased Trifolium repens tolerance to diesel and significantly increased the phytoremediation effect at 60 days, with a removal rate of 36 ± 8%, compared to 28 ± 7% in the control. These results contribute to the ongoing effort to develop an effective phytoremediation system for soils highly contaminated by diesel.
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Affiliation(s)
- Ying Xi
- Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Daxue Road 8#, Yichang 443002, PR China
| | - Yizhi Song
- Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Daxue Road 8#, Yichang 443002, PR China
| | - David M Johnson
- Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Daxue Road 8#, Yichang 443002, PR China
| | - Meng Li
- Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Daxue Road 8#, Yichang 443002, PR China
| | - Huigang Liu
- Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Daxue Road 8#, Yichang 443002, PR China.
| | - Yingping Huang
- Engineering Research Center of Eco-environment in Three Gorges Reservoir Region, Ministry of Education, China Three Gorges University, Daxue Road 8#, Yichang 443002, PR China.
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31
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Involvement of polyhydroxyalkanoates in stress resistance of microbial cells: Biotechnological consequences and applications. Biotechnol Adv 2018; 36:856-870. [DOI: 10.1016/j.biotechadv.2017.12.006] [Citation(s) in RCA: 122] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 11/24/2017] [Accepted: 12/12/2017] [Indexed: 01/30/2023]
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32
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Kuppusamy S, Venkateswarlu K, Megharaj M, Mayilswami S, Lee YB. Risk-based remediation of polluted sites: A critical perspective. CHEMOSPHERE 2017; 186:607-615. [PMID: 28813695 DOI: 10.1016/j.chemosphere.2017.08.043] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Revised: 08/08/2017] [Accepted: 08/09/2017] [Indexed: 06/07/2023]
Abstract
Sites contaminated with chemical pollutants represent a growing challenge, and remediation of such lands is of international concern. Risk-based land management (RBLM) is an emerging approach that integrates risk assessment practices with more traditional site-specific investigations and remediation activities. Developing countries are yet to adopt RBLM strategies for remediation. RBLM is considered to be practical, scientifically defensible and cost-efficient. However, it is inherently limited by: firstly, the accuracy of risk assessment models used; secondly, ramifications of the fact that they are more likely to leave contamination in place; and thirdly, uncertainties involved and having to consider the total concentrations of all contaminants in soils that overestimate the potential risks from exposure to the contaminants. Consideration of contaminant bioavailability as the underlying basis for risk assessment and setting remediation goals of those contaminated lands that pose a risk to environmental and human health may lead to the development of a more sophisticated risk-based approach. However, employing the bioavailability concept in RBLM has not been extensively studied and/or legalized. This review highlights the extent of global land contamination, and the concept of risk-based assessment and management of contaminated sites including its advantages and disadvantages. Furthermore, the concept of bioavailability-based RBLM strategy has been proposed, and the challenges of RBLM and the priority areas for future research are summarized. Thus, the present review may help achieve a better understanding and successful implementation of a sustainable bioavailability-based RBLM strategy.
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Affiliation(s)
- Saranya Kuppusamy
- Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Republic of Korea.
| | - Kadiyala Venkateswarlu
- Formerly Department of Microbiology, Sri Krishnadevaraya University, Anantapur 515055, India
| | - Mallavarapu Megharaj
- Global Centre for Environmental Remediation (GCER), Faculty of Science and Information Technology, The University of Newcastle, Callaghan, NSW 2308, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE), The University of Newcastle, Callaghan, NSW 2308, Australia
| | - Srinithi Mayilswami
- Formerly Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia, Mawson Lakes, SA 5095, Australia
| | - Yong Bok Lee
- Institute of Agriculture and Life Science, Gyeongsang National University, Jinju 52828, Republic of Korea; Division of Applied Life Science (BK21 Plus), Gyeongsang National University, Jinju 52828, Republic of Korea
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Qi YB, Wang CY, Lv CY, Lun ZM, Zheng CG. Removal Capacities of Polycyclic Aromatic Hydrocarbons (PAHs) by a Newly Isolated Strain from Oilfield Produced Water. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2017; 14:ijerph14020215. [PMID: 28241412 PMCID: PMC5334769 DOI: 10.3390/ijerph14020215] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2016] [Revised: 01/11/2017] [Accepted: 01/20/2017] [Indexed: 11/16/2022]
Abstract
The polycyclic aromatic hydrocarbon (PAH)-degrading strain Q8 was isolated from oilfield produced water. According to the analysis of a biochemical test, 16S rRNA gene, house-keeping genes and DNA-DNA hybridization, strain Q8 was assigned to a novel species of the genus Gordonia. The strain could not only grow in mineral salt medium (MM) and utilize naphthalene and pyrene as its sole carbon source, but also degraded mixed naphthalene, phenanthrene, anthracene and pyrene. The degradation ratio of these four PAHs reached 100%, 95.4%, 73.8% and 53.4% respectively after being degraded by Q8 for seven days. A comparative experiment found that the PAHs degradation efficiency of Q8 is higher than that of Gordonia alkaliphila and Gordonia paraffinivorans, which have the capacities to remove PAHs. Fourier transform infrared spectra, saturate, aromatic, resin and asphaltene (SARA) and gas chromatography-mass spectrometry (GC-MS) analysis of crude oil degraded by Q8 were also studied. The results showed that Q8 could utilize n-alkanes and PAHs in crude oil. The relative proportions of the naphthalene series, phenanthrene series, thiophene series, fluorene series, chrysene series, C21-triaromatic steroid, pyrene, and benz(a)pyrene were reduced after being degraded by Q8. Gordonia sp. nov. Q8 had the capacity to remediate water and soil environments contaminated by PAHs or crude oil, and provided a feasible way for the bioremediation of PAHs and oil pollution.
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Affiliation(s)
- Yi-Bin Qi
- Petroleum Exploration & Production Research Institute, SINOPEC, No. 31, Xueyuan Road, Haidian District, Beijing 100083, China.
| | - Chen-Yu Wang
- China University of Geosciences-Beijing, College of Energy, No. 29, Xueyuan Road, Haidian District, Beijing 100083, China.
| | - Cheng-Yuan Lv
- Petroleum Exploration & Production Research Institute, SINOPEC, No. 31, Xueyuan Road, Haidian District, Beijing 100083, China.
| | - Zeng-Min Lun
- Petroleum Exploration & Production Research Institute, SINOPEC, No. 31, Xueyuan Road, Haidian District, Beijing 100083, China.
| | - Cheng-Gang Zheng
- Petroleum Exploration & Production Research Institute, SINOPEC, No. 31, Xueyuan Road, Haidian District, Beijing 100083, China.
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Kuppusamy S, Thavamani P, Venkateswarlu K, Lee YB, Naidu R, Megharaj M. Remediation approaches for polycyclic aromatic hydrocarbons (PAHs) contaminated soils: Technological constraints, emerging trends and future directions. CHEMOSPHERE 2017; 168:944-968. [PMID: 27823779 DOI: 10.1016/j.chemosphere.2016.10.115] [Citation(s) in RCA: 320] [Impact Index Per Article: 45.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 10/26/2016] [Accepted: 10/27/2016] [Indexed: 05/22/2023]
Abstract
For more than a decade, the primary focus of environmental experts has been to adopt risk-based management approaches to cleanup PAH polluted sites that pose potentially destructive ecological consequences. This focus had led to the development of several physical, chemical, thermal and biological technologies that are widely implementable. Established remedial options available for treating PAH contaminated soils are incineration, thermal conduction, solvent extraction/soil washing, chemical oxidation, bioaugmentation, biostimulation, phytoremediation, composting/biopiles and bioreactors. Integrating physico-chemical and biological technologies is also widely practiced for better cleanup of PAH contaminated soils. Electrokinetic remediation, vermiremediation and biocatalyst assisted remediation are still at the development stage. Though several treatment methods to remediate PAH polluted soils currently exist, a comprehensive overview of all the available remediation technologies to date is necessary so that the right technology for field-level success is chosen. The objective of this review is to provide a critical overview in this respect, focusing only on the treatment options available for field soils and ignoring the spiked ones. The authors also propose the development of novel multifunctional green and sustainable systems like mixed cell culture system, biosurfactant flushing, transgenic approaches and nanoremediation in order to overcome the existing soil- contaminant- and microbial-associated technological limitations in tackling high molecular weight PAHs. The ultimate objective is to ensure the successful remediation of long-term PAH contaminated soils.
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Affiliation(s)
- Saranya Kuppusamy
- Institute of Agriculture and Life Science, Gyeongsang National University, Jinju, 52828, Republic of Korea; Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia, Mawson Lakes, SA5095, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE), PO Box 486, Salisbury South, SA5106, Australia.
| | - Palanisami Thavamani
- Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE), PO Box 486, Salisbury South, SA5106, Australia; Global Centre for Environmental Remediation (GCER), Faculty of Science and Information Technology, The University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Kadiyala Venkateswarlu
- Formerly Department of Microbiology, Sri Krishnadevaraya University, Anantapur, 515055, India
| | - Yong Bok Lee
- Institute of Agriculture and Life Science, Gyeongsang National University, Jinju, 52828, Republic of Korea
| | - Ravi Naidu
- Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia, Mawson Lakes, SA5095, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE), PO Box 486, Salisbury South, SA5106, Australia; Global Centre for Environmental Remediation (GCER), Faculty of Science and Information Technology, The University of Newcastle, Callaghan, NSW, 2308, Australia
| | - Mallavarapu Megharaj
- Centre for Environmental Risk Assessment and Remediation (CERAR), University of South Australia, Mawson Lakes, SA5095, Australia; Cooperative Research Centre for Contamination Assessment and Remediation of Environment (CRC CARE), PO Box 486, Salisbury South, SA5106, Australia; Global Centre for Environmental Remediation (GCER), Faculty of Science and Information Technology, The University of Newcastle, Callaghan, NSW, 2308, Australia
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