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Deng C, Zhao R, Qiu Z, Li B, Zhang T, Guo F, Mu R, Wu Y, Qiao X, Zhang L, Cheng JJ, Ni J, Yu K. Genome-centric metagenomics provides new insights into the microbial community and metabolic potential of landfill leachate microbiota. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 816:151635. [PMID: 34774959 DOI: 10.1016/j.scitotenv.2021.151635] [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: 08/26/2021] [Revised: 11/08/2021] [Accepted: 11/08/2021] [Indexed: 06/13/2023]
Abstract
Landfills are important sources of microorganisms associated with anaerobic digestion. However, the knowledge on microbiota along with their functional potential in this special habitat are still lacking. In this study, we recovered 1168 non-redundant metagenome-assembled genomes (MAGs) from nine landfill leachate samples collected from eight cities across China, spanning 42 phyla, 73 classes, 114 orders, 189 families, and 267 genera. Totally, 74.1% of 1168 MAGs could not be classified to any known species and 5.9% of these MAGs belonged to microbial dark matter phyla. Two putative novel classes were discovered from landfill leachate samples. The identification of thousands of novel carbohydrate-active enzymes showed similar richness level compared to the cow rumen microbiota. The methylotrophic methanogenic pathway was speculated to contribute significantly to methane production in the landfill leachate because of its co-occurrence with the acetoclastic and hydrogenotrophic methanogenic pathways. The genetic potential of dissimilatory nitrate reduction to ammonium (DNRA) was observed, implying DNRA may play a role in ammonium generation in landfill leachate. These findings implied that landfill leachate might be a valuable microbial resource repository and filled the previous understanding gaps for both methanogenesis and nitrogen cycling in landfill leachate microbiota. Our study provides a comprehensive genomic catalog and substantially provides unprecedented taxonomic and functional profiles of the landfill leachate microbiota.
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Affiliation(s)
- Chunfang Deng
- School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China; College of Environmental Sciences and Engineering, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Peking University, Beijing 100871, China
| | - Renxin Zhao
- Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; Shenzhen Engineering Research Laboratory for Sludge and Food Waste Treatment and Resource Recovery, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China
| | - Zhiguang Qiu
- School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Bing Li
- Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China; Shenzhen Engineering Research Laboratory for Sludge and Food Waste Treatment and Resource Recovery, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen 518055, China.
| | - Tong Zhang
- Environmental Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong 999077, China
| | - Feng Guo
- School of Life Sciences, Xiamen University, Xiamen 361005, China
| | - Rong Mu
- School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Yang Wu
- School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Xuejiao Qiao
- School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Liyu Zhang
- School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China
| | - Jay J Cheng
- School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China; Biological & Agricultural Engineering Department, North Carolina State University, Raleigh, NC 27695, USA
| | - Jinren Ni
- College of Environmental Sciences and Engineering, Key Laboratory of Water and Sediment Sciences, Ministry of Education, Peking University, Beijing 100871, China
| | - Ke Yu
- School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China.
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Herrero J, Puigserver D, Nijenhuis I, Kuntze K, Carmona JM. Key factors controlling microbial distribution on a DNAPL source area. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:1508-1520. [PMID: 34355320 PMCID: PMC8724114 DOI: 10.1007/s11356-021-15635-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 07/21/2021] [Indexed: 05/03/2023]
Abstract
Chlorinated solvents are among the common groundwater contaminants that show high complexity in their distribution in the subsoil. Microorganisms play a vital role in the natural attenuation of chlorinated solvents. Thus far, how the in situ soil microbial community responds to chlorinated solvent contamination has remained unclear. In this study, the microbial community distribution within two boreholes located in the source area of perchloroethene (PCE) was investigated via terminal restriction fragment length polymorphism (T-RFLP) and clone library analysis. Microbial data were related to the lithological and geochemical data and the concentration and isotopic composition of chloroethenes to determine the key factors controlling the distribution of the microbial communities. The results indicated that Proteobacteria, Actinobacteria, and Firmicutes were the most abundant phylums in the sediment. The statistical correlation with the environmental data proved that fine granulometry, oxygen tolerance, terminal electron-acceptor processes, and toxicity control microbial structure. This study improves our understanding of how the microbial community in the subsoil responds to high concentrations of chlorinated solvents.
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Affiliation(s)
- Jofre Herrero
- Department of Minerology, Petrology and Applied Geology, Faculty of Earth Sciences, The Water Research Institute (IdRA), University of Barcelona, C/ Martí Franquès sn, Barcelona, Spain.
| | - Diana Puigserver
- Department of Minerology, Petrology and Applied Geology, Faculty of Earth Sciences, The Water Research Institute (IdRA), University of Barcelona, C/ Martí Franquès sn, Barcelona, Spain
| | - Ivonne Nijenhuis
- Department of Isotope Biogeochemistry (ISOBIO), UFZ Centre for Environmental Research Leipzig-Halle, Permoserstr. 15, 04318, Leipzig, Germany
| | - Kevin Kuntze
- Department of Isotope Biogeochemistry (ISOBIO), UFZ Centre for Environmental Research Leipzig-Halle, Permoserstr. 15, 04318, Leipzig, Germany
- Isodetect, Deutscher Platz 5b, 04103, Leipzig, Germany
| | - José M Carmona
- Department of Minerology, Petrology and Applied Geology, Faculty of Earth Sciences, The Water Research Institute (IdRA), University of Barcelona, C/ Martí Franquès sn, Barcelona, Spain
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Li J, Hu A, Bai S, Yang X, Sun Q, Liao X, Yu CP. Characterization and Performance of Lactate-Feeding Consortia for Reductive Dechlorination of Trichloroethene. Microorganisms 2021; 9:microorganisms9040751. [PMID: 33918519 PMCID: PMC8065584 DOI: 10.3390/microorganisms9040751] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 03/26/2021] [Accepted: 03/30/2021] [Indexed: 11/16/2022] Open
Abstract
Understanding the underlying mechanism that drives the microbial community mediated by substrates is crucial to enhance the biostimulation in trichloroethene (TCE)-contaminated sites. Here, we investigated the performance of stable TCE-dechlorinating consortia by monitoring the variations in TCE-related metabolites and explored their underlying assembly mechanisms using 16S rDNA amplicon sequencing and bioinformatics analyses. The monitoring results indicated that three stable TCE-dechlorinating consortia were successfully enriched by lactate-containing anaerobic media. The statistical analysis results demonstrated that the microbial communities of the enrichment cultures changed along with time and were distinguished by their sample sources. The deterministic and stochastic processes were simultaneously responsible for shaping the TCE-dechlorinating community assembly. The indicator patterns shifted with the exhaustion of the carbon source and the pollutants, and the tceA-carrying Dehalococcoides, as an indicator for the final stage samples, responded positively to TCE removal during the incubation period. Pseudomonas, Desulforhabdus, Desulfovibrio and Methanofollis were identified as keystone populations in the TCE-dechlorinating process by co-occurrence network analysis. The results of this study indicate that lactate can be an effective substrate for stimulated bioremediation of TCE-contaminated sites, and the reduction of the stochastic forces or enhancement of the deterministic interventions may promote more effective biostimulation.
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Affiliation(s)
- Jiangwei Li
- CAS Key Laboratory of Urban Pollutant Conversion, Fujian Key Laboratory of Watershed Ecology, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; (J.L.); (A.H.); (X.Y.); (Q.S.); (X.L.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Anyi Hu
- CAS Key Laboratory of Urban Pollutant Conversion, Fujian Key Laboratory of Watershed Ecology, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; (J.L.); (A.H.); (X.Y.); (Q.S.); (X.L.)
| | - Shijie Bai
- Institute of Deep Sea Science and Engineering, Chinese Academic of Sciences, Sanya 572000, China;
| | - Xiaoyong Yang
- CAS Key Laboratory of Urban Pollutant Conversion, Fujian Key Laboratory of Watershed Ecology, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; (J.L.); (A.H.); (X.Y.); (Q.S.); (X.L.)
| | - Qian Sun
- CAS Key Laboratory of Urban Pollutant Conversion, Fujian Key Laboratory of Watershed Ecology, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; (J.L.); (A.H.); (X.Y.); (Q.S.); (X.L.)
| | - Xu Liao
- CAS Key Laboratory of Urban Pollutant Conversion, Fujian Key Laboratory of Watershed Ecology, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; (J.L.); (A.H.); (X.Y.); (Q.S.); (X.L.)
| | - Chang-Ping Yu
- CAS Key Laboratory of Urban Pollutant Conversion, Fujian Key Laboratory of Watershed Ecology, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; (J.L.); (A.H.); (X.Y.); (Q.S.); (X.L.)
- Water Innovation, Low Carbon and Environmental Sustainability Research Center, National Taiwan University, Taipei 10617, Taiwan
- Correspondence:
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Dolinová I, Štrojsová M, Černík M, Němeček J, Macháčková J, Ševců A. Microbial degradation of chloroethenes: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:13262-13283. [PMID: 28378313 DOI: 10.1007/s11356-017-8867-y] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2016] [Accepted: 03/17/2017] [Indexed: 05/28/2023]
Abstract
Contamination by chloroethenes has a severe negative effect on both the environment and human health. This has prompted intensive remediation activity in recent years, along with research into the efficacy of natural microbial communities for degrading toxic chloroethenes into less harmful compounds. Microbial degradation of chloroethenes can take place either through anaerobic organohalide respiration, where chloroethenes serve as electron acceptors; anaerobic and aerobic metabolic degradation, where chloroethenes are used as electron donors; or anaerobic and aerobic co-metabolic degradation, with chloroethene degradation occurring as a by-product during microbial metabolism of other growth substrates, without energy or carbon benefit. Recent research has focused on optimising these natural processes to serve as effective bioremediation technologies, with particular emphasis on (a) the diversity and role of bacterial groups involved in dechlorination microbial processes, and (b) detection of bacterial enzymes and genes connected with dehalogenation activity. In this review, we summarise the different mechanisms of chloroethene bacterial degradation suitable for bioremediation and provide a list of dechlorinating bacteria. We also provide an up-to-date summary of primers available for detecting functional genes in anaerobic and aerobic bacteria degrading chloroethenes metabolically or co-metabolically.
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Affiliation(s)
- Iva Dolinová
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentská 2, 461 17, Liberec, Czech Republic
- Faculty of Mechatronics, Informatics and Interdisciplinary Studies, Technical University of Liberec, Studentská 2, 461 17, Liberec, Czech Republic
| | - Martina Štrojsová
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentská 2, 461 17, Liberec, Czech Republic
| | - Miroslav Černík
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentská 2, 461 17, Liberec, Czech Republic
- Faculty of Mechatronics, Informatics and Interdisciplinary Studies, Technical University of Liberec, Studentská 2, 461 17, Liberec, Czech Republic
| | - Jan Němeček
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentská 2, 461 17, Liberec, Czech Republic
| | - Jiřina Macháčková
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentská 2, 461 17, Liberec, Czech Republic
| | - Alena Ševců
- Institute for Nanomaterials, Advanced Technologies and Innovation, Technical University of Liberec, Studentská 2, 461 17, Liberec, Czech Republic.
- Faculty of Mechatronics, Informatics and Interdisciplinary Studies, Technical University of Liberec, Studentská 2, 461 17, Liberec, Czech Republic.
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16S rRNA gene-based comprehensive analysis of microbial community compositions in a full-scale leachate treatment system. J Biosci Bioeng 2016; 122:708-715. [PMID: 27594512 DOI: 10.1016/j.jbiosc.2016.06.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 05/16/2016] [Accepted: 06/07/2016] [Indexed: 11/20/2022]
Abstract
In this study, we performed a comprehensive analysis of microbial community compositions in leachate and leachate treatment system (14 processes) during dry and rainy seasons (from February to September and from October to January, respectively), at Khanh Son landfill site, Danang City, Vietnam. In this study, raw leachate in dry and rainy seasons was predominated by Arcobacter, Clostridia, Thermotogales, Methanobacteriaceae, and Methanosaeta. During the two seasons, the system had different microbial community compositions. Orders Methanobacteriales, Clostridiales, MBA08 (order-level clone cluster), and Thermotogales predominated the influent, anaerobic pond, and anoxic pond during the dry season, while Campylobacterales and Pseudomonadales orders were predominant in the anaerobic/anoxic systems during the rainy season. In the facultative pond, aerated ponds, sediment tanks, and polishing ponds, predominant orders during the dry season included Actinomycetales, "Saprospirales", Flavobacteriales, Rhizobiales, Rhodospirillales, Burkholderiales, and Alteromonadales; during the rainy season: Sphingobacteriales, Rickettsiales, Sphingomonadales, and Pseudomonadales. In the final post treatment (polishing ponds with vegetation), significant removal of organic matter, total nitrogen, and colour occurred, while nitrogen-fixing and root-associated or related organisms predominated. This suggested that the vegetation in the ponds was essential to achieve the sufficient leachate treatment.
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Mackuľak T, Takáčová A, Gál M, Marton M, Ryba J. PVC degradation by Fenton reaction and biological decomposition. Polym Degrad Stab 2015. [DOI: 10.1016/j.polymdegradstab.2015.07.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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7
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Analysis of microbial community structure and composition in leachates from a young landfill by 454 pyrosequencing. Appl Microbiol Biotechnol 2015; 99:5657-68. [DOI: 10.1007/s00253-015-6409-4] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2014] [Revised: 01/13/2015] [Accepted: 01/15/2015] [Indexed: 10/24/2022]
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8
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Iwahori K, Watanabe JI, Tani Y, Seyama H, Miyata N. Removal of heavy metal cations by biogenic magnetite nanoparticles produced in Fe(III)-reducing microbial enrichment cultures. J Biosci Bioeng 2014; 117:333-5. [DOI: 10.1016/j.jbiosc.2013.08.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2013] [Revised: 08/10/2013] [Accepted: 08/26/2013] [Indexed: 10/26/2022]
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9
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Liu X, Yoon S, Batchelor B, Abdel-Wahab A. Degradation of vinyl chloride (VC) by the sulfite/UV advanced reduction process (ARP): effects of process variables and a kinetic model. THE SCIENCE OF THE TOTAL ENVIRONMENT 2013; 454-455:578-583. [PMID: 23570912 DOI: 10.1016/j.scitotenv.2013.03.060] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Revised: 03/16/2013] [Accepted: 03/16/2013] [Indexed: 06/02/2023]
Abstract
Vinyl chloride (VC) poses a threat to humans and environment due to its toxicity and carcinogenicity. In this study, an advanced reduction process (ARP) that combines sulfite with UV light was developed to destroy VC. The degradation of VC followed pseudo-first-order decay kinetics and the effects of several experimental factors on the degradation rate constant were investigated. The largest rate constant was observed at pH9, but complete dechlorination was obtained at pH11. Higher sulfite dose and light intensity were found to increase the rate constant linearly. The rate constant had a little drop when the initial VC concentration was below 1.5mg/L and then was approximately constant between 1.5mg/L and 3.1mg/L. A degradation mechanism was proposed to describe reactions between VC and the reactive species that were produced by the photolysis of sulfite. A kinetic model that described major reactions in the system was developed and was able to explain the dependence of the rate constant on the experimental factors examined. This study may provide a new treatment technology for the removal of a variety of halogenated contaminants.
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Affiliation(s)
- Xu Liu
- Zachry Department of Civil Engineering, Texas A&M University, College Station, TX 77843-3136, USA.
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10
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The Effect of Biomass Immobilization Support Material and Bed Porosity on Hydrogen Production in an Upflow Anaerobic Packed-Bed Bioreactor. Appl Biochem Biotechnol 2013; 170:1348-66. [DOI: 10.1007/s12010-013-0262-7] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Accepted: 04/22/2013] [Indexed: 10/26/2022]
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Shukla AK, Upadhyay SN, Dubey SK. Current trends in trichloroethylene biodegradation: a review. Crit Rev Biotechnol 2012; 34:101-14. [PMID: 23057686 DOI: 10.3109/07388551.2012.727080] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Over the past few years biodegradation of trichloroethylene (TCE) using different microorganisms has been investigated by several researchers. In this review article, an attempt has been made to present a critical summary of the recent results related to two major processes--reductive dechlorination and aerobic co-metabolism used for TCE biodegradation. It has been shown that mainly Clostridium sp. DC-1, KYT-1, Dehalobacter, Dehalococcoides, Desulfuromonas, Desulfitobacterium, Propionibacterium sp. HK-1, and Sulfurospirillum bacterial communities are responsible for the reductive dechlorination of TCE. Efficacy of bacterial communities like Nitrosomonas, Pseudomonas, Rhodococcus, and Xanthobacter sp. etc. for TCE biodegradation under aerobic conditions has also been examined. Mixed cultures of diazotrophs and methanotrophs have been used for TCE degradation in batch and continuous cultures (biofilter) under aerobic conditions. In addition, some fungi (Trametes versicolor, Phanerochaete chrysosporium ME-446) and Actinomycetes have also been used for aerobic biodegradation of TCE. The available information on kinetics of biofiltration of TCE and its degradation end-products such as CO2 are discussed along with the available results on the diversity of bacterial community obtained using molecular biological approaches. It has emerged that there is a need to use metabolic engineering and molecular biological tools more intensively to improve the robustness of TCE degrading microbial species and assess their diversity.
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Affiliation(s)
- Awadhesh Kumar Shukla
- Department of Botany, Faculty of Science, Banaras Hindu University , Varanasi , India and
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Yamasaki S, Nomura N, Nakajima T, Uchiyama H. Cultivation-independent identification of candidate dehalorespiring bacteria in tetrachloroethylene degradation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:7709-7716. [PMID: 22708499 DOI: 10.1021/es301288y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Tetrachloroethylene (PCE) is one of the major pollutants and is degraded by dissimilation by dehalorespiring bacteria. The dehalorespiring bacteria are anaerobic, and most cannot be cultured by conventional agar plating methods. Therefore, to identify the dehalorespiring bacteria that dissimilatively degrade PCE, a cultivation-independent method is required. To achieve accurate and detailed analysis of the bacteria, we developed a novel stable isotope probing (SIP) method. This technique involves 2 steps, namely, a labeling step, in which a labeled carbon source is incorporated into the sample's DNA, and an analysis step, in which the DNA is isolated, fractionated, and analyzed by polymerase chain reaction denaturing gradient gel electrophoresis (PCR-DGGE). Subsequently, 16S rRNA sequencing and phylogenetic analysis were performed to identify the bacteria. Initially, we examined the effectiveness of this method by using Dehalococcoides ethenogenes 195 consortium as a defined model system. The result indicated the method was able to correctly identify the dehalorespiring bacteria D. ethenogenes 195 from the consortium. Moreover, in an artificially contaminated microcosm experiment, we confirmed that the method was able to identify the indigenous dehalorespiring bacteria Dehalobacter sp. Thus, we concluded that this novel method was a feasible tool to identify dehalorespiring bacteria in natural environments.
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Affiliation(s)
- Shouhei Yamasaki
- Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Ibaraki, Japan
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Chang YC, Ikeutsu K, Toyama T, Choi D, Kikuchi S. Isolation and characterization of tetrachloroethylene- and cis-1,2-dichloroethylene-dechlorinating propionibacteria. J Ind Microbiol Biotechnol 2011; 38:1667-77. [DOI: 10.1007/s10295-011-0956-1] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2010] [Accepted: 03/05/2011] [Indexed: 11/28/2022]
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Mattes TE, Alexander AK, Coleman NV. Aerobic biodegradation of the chloroethenes: pathways, enzymes, ecology, and evolution. FEMS Microbiol Rev 2010; 34:445-75. [DOI: 10.1111/j.1574-6976.2010.00210.x] [Citation(s) in RCA: 113] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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15
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Imfeld G, Aragonés CE, Fetzer I, Mészáros É, Zeiger S, Nijenhuis I, Nikolausz M, Delerce S, Richnow HH. Characterization of microbial communities in the aqueous phase of a constructed model wetland treating 1,2-dichloroethene-contaminated groundwater. FEMS Microbiol Ecol 2010; 72:74-88. [DOI: 10.1111/j.1574-6941.2009.00825.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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16
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Imfeld G, Aragonés CE, Zeiger S, Von Eckstädt CV, Paschke H, Trabitzsch R, Weiss H, Richnow HH. Tracking in situ biodegradation of 1,2-dichloroethenes in a model wetland. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2008; 42:7924-7930. [PMID: 19031882 DOI: 10.1021/es8014277] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The spatial and temporal biogeochemical development of a model wetland loaded with cis- and trans-1,2-dichloroethene contaminated groundwater was characterized over 430 days by hydrogeochemical and compound-specific isotope analyses (CSIA). The hydrogeochemistry dramatically changed over time from oxic to strongly reducing conditions as emphasized by increasing concentrations of ferrous iron, sulfide, and methane since day 225. delta(13)C values for trans- and cis-DCE substantially changed over the flow path and correlated over time with DCE removal. The carbon enrichment factor values (epsilon) retrieved from the wetland became progressively larger over the investigation period, ranging from -1.7 +/- 0.3% per hundred to -32.6 +/- 2.2% per hundred. This indicated that less fractionating DCE oxidation was progressively replaced by reductive dechlorination, associated with a more pronounced isotopic effect and further confirmed by the detection of vinyl chloride and ethene since day 250. This study demonstrates the linkage between hydrogeochemical variability and intrinsic degradation processes and highlights the potential of CSIA to trace the temporal and spatial changes of the dominant degradation mechanism of DCE in natural or engineered systems.
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Affiliation(s)
- Gwenaël Imfeld
- Department of Isotope Biogeochemistry, Helmholtz Centre for Environmental Research-UFZ, Leipzig D-04318, Germany.
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Singhal N, Jaffé P, Maier W, Jho EH. The opposing effects of bacterial activity and gas production on anaerobic TCE degradation in soil columns. CHEMOSPHERE 2007; 69:1790-7. [PMID: 17610933 DOI: 10.1016/j.chemosphere.2007.05.049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2006] [Revised: 05/19/2007] [Accepted: 05/21/2007] [Indexed: 05/16/2023]
Abstract
This laboratory study explores the effect of growth substrate concentration on the anaerobic degradation of trichloroethylene (TCE) in sand packed columns. In all columns the growth substrate rapidly degraded to gas, that formed a separate phase. Biomass accumulated in the 0-4.8 cm section of the columns in proportion to the influent growth substrate concentration and biomass concentrations in the remaining sections of all columns were similar to the column receiving the lowest substrate concentration. Increases in growth substrate concentration up to 3030 mg-CODl(-1) promoted TCE degradation, but a further increase to 14300 mg-CODl(-1) reduced the amount of TCE completely dechlorinated but did not affect the production of chlorinated TCE intermediates. The mathematical model developed here satisfactorily described the enhancement in TCE dehalogenation for substrate concentration up to 3030 mg-CODl(-1); reproducing TCE dehalogenation for 14300 mg-CODl(-1) required that the moisture content used in simulation be lowered to 0.1. The study shows that volatilization of TCE can be significant and volatilization losses should be taken into account when anaerobic activity in in-situ bioremediation applications is stimulated via addition of growth substrates. An implication of the modeling simulations is that maintaining a lower, but uniform, substrate concentration over the contaminated region may lead to faster contaminant degradation.
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Affiliation(s)
- Naresh Singhal
- Civil and Environmental Engineering, Princeton University, Princeton, NJ 08544, USA.
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Characterization of a newly isolatedcis-1,2-dichloroethylene and aliphatic compound-degrading bacterium,Clostridium sp. strain KYT-1. BIOTECHNOL BIOPROC E 2006. [DOI: 10.1007/bf02932083] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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