1
|
Li X, Wang J, Yang Y, Jin H, Wang H, Zhang Z, Li X, Cui Y, Wang X, Yan J. Sequential Reductive Dechlorination of Triclosan by Sediment Microbiota Harboring Organohalide-Respiring Dehalococcoidia. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2024; 58:14843-14854. [PMID: 39106339 DOI: 10.1021/acs.est.4c04594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/09/2024]
Abstract
Aquatic ecosystems represent a prominent reservoir of xenobiotic compounds, including triclosan (TCS), a broad-spectrum biocide extensively used in pharmaceuticals and personal care products. As a biogeochemical hotspot, the potential of aquatic sediments for the degradation of TCS remains largely unexplored. Here, we demonstrated anaerobic biotransformation of TCS in a batch microcosm established with freshwater sediment. The initial 43.4 ± 2.2 μM TCS was completely dechlorinated to diclosan, followed by subsequent conversion to 5-chloro-2-phenoxyphenol, a monochlorinated TCS (MCS) congener. Analyses of community profile and population dynamics revealed substrate-specific, temporal-growth of Dehalococcoides and Dehalogenimonas, which are organohalide-respiring bacteria (OHRB) affiliated with class Dehalococcoidia. Dehalococcoides growth was linked to the formation of diclosan but not MCS, yielding 3.6 ± 0.4 × 107 cells per μmol chloride released. A significant increase in Dehalogenimonas cells, from 1.5 ± 0.4 × 104 to 1.5 ± 0.3 × 106 mL-1, only occurred during the reductive dechlorination of diclosan to MCS. Dehalococcoidia OHRB gradually disappeared following consecutive transfers, likely due to the removal of sediment materials with strong adsorption capacity that could alleviate TCS's antimicrobial toxicity. Consequently, a solid-free, functionally stable TCS-dechlorinating consortium was not obtained. Our results provide insights into the microbial determinants controlling the environmental fate of TCS.
Collapse
Affiliation(s)
- Xiuying Li
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China
- Liaoning Technical Innovation Center for Ecological Restoration of Polluted Environment, Shenyang, Liaoning 110016, China
| | - Jingjing Wang
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China
- Liaoning Technical Innovation Center for Ecological Restoration of Polluted Environment, Shenyang, Liaoning 110016, China
| | - Yi Yang
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China
- Liaoning Technical Innovation Center for Ecological Restoration of Polluted Environment, Shenyang, Liaoning 110016, China
| | - Huijuan Jin
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China
- Liaoning Technical Innovation Center for Ecological Restoration of Polluted Environment, Shenyang, Liaoning 110016, China
| | - Hongyan Wang
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhipeng Zhang
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China
- College of Bioscience and Biotechnology, Shenyang Agricultural University, Shenyang 110866, China
| | - Xiaocui Li
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yiru Cui
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xin Wang
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jun Yan
- Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, Liaoning 110016, China
- Liaoning Technical Innovation Center for Ecological Restoration of Polluted Environment, Shenyang, Liaoning 110016, China
| |
Collapse
|
2
|
Liu M, Su X, Yuan J, Chen Y, Huang X, Yang X, Zheng J, Li Q, Xu J, He Y. Residual effects of chlorinated organic pollutants on microbial community and natural redox processes in coastal wetlands. JOURNAL OF HAZARDOUS MATERIALS 2024; 465:133364. [PMID: 38176260 DOI: 10.1016/j.jhazmat.2023.133364] [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: 11/03/2023] [Revised: 12/11/2023] [Accepted: 12/22/2023] [Indexed: 01/06/2024]
Abstract
Chlorinated organic pollutants (COPs) are common in flooded environments. To examine the residual status and effects of COPs on flooded environments, a survey of 7 coastal wetlands in Zhejiang, East China was conducted. Total COP concentrations detected from 95.69 to 412.76 ng g-1 dw. Gamma-HCH and o,p'-DDT posed the greatest risk with exceedance rates of 100% according to sediment quality guidelines. Samples with higher COP pollution had higher microbial diversity, more complex microbial networks, more deterministic community assembly processes and lower microbiome stability, indicating an improved soil function for balance cycle of substances, especially for COP degradation. Further analysis using quantitative real-time PCR suggested COP-dechlorination interacted with natural redox processes, especially sulfate reduction and methanogenesis. The positive correlation between CH4 and pentachlorobenzene indicated a potential increase in greenhouse gas emissions caused by COP pollution. Correlation between dsr gene and COPs demonstrated the ability of sulfate-reducing bacteria to degrade COPs. Particularly, facultative OHRB such as sulfate-reducing bacteria hold significant importance in the process of COP-dechlorination. This finding provides a reference for COP pollution remediation. Collectively, our study offers new insight into the residual effect of COPs in coastal wetlands and contributes to an improved understanding of bioremediation strategies for COP pollution.
Collapse
Affiliation(s)
- Meng Liu
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xin Su
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Jing Yuan
- Department of Urban Studies and Planning, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Yuxuan Chen
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xiaowei Huang
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Xueling Yang
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Jinjin Zheng
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Qinfen Li
- Environmental and Plant Protection Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou, 571101, Hainan, China
| | - Jianming Xu
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Yan He
- Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, Hangzhou 310058, China.
| |
Collapse
|
3
|
Chen Q, Li Z, Chen Y, Liu M, Yang Q, Zhu B, Mu J, Feng L, Chen Z. Effects of electron acceptors and donors on anaerobic biodegradation of PAHs in marine sediments. MARINE POLLUTION BULLETIN 2024; 199:115925. [PMID: 38113802 DOI: 10.1016/j.marpolbul.2023.115925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2023] [Revised: 12/06/2023] [Accepted: 12/10/2023] [Indexed: 12/21/2023]
Abstract
Polycyclic aromatic hydrocarbons (PAHs) are typical organic pollutants accumulated in the environment. PAHs' bioremediation in sediments can be promoted by adding electron acceptor (EA) and electron donor (ED). Bicarbonate and sulfate were chosen as two EAs, and acetate and lactate were selected as two EDs. Six groups of amendments were added into the sediments to access their role in the anaerobic biodegradation of five PAHs, containing phenanthrene, anthracene, fluoranthene, pyrene, and benzo[a]pyrene. The concentrations of PAHs, EAs and EDs, electron transport system activity, and microbial diversity were analyzed during 126-day biodegradation in serum bottles. The HA group (bicarbonate and acetate) achieved the maximum PAH degradation efficiency of 89.67 %, followed by the SL group (sulfate and lactate) with 87.10 %. As the main PAHs degrading bacteria, the abundance of Marinobacter in H group was 8.62 %, and the addition of acetate significantly increased the abundance of Marinobacter in the HA group by 75.65 %.
Collapse
Affiliation(s)
- Qingguo Chen
- Zhejiang Key Laboratory of Petrochemical Environmental Pollution, Zhejiang Ocean University, Zhoushan 316022, PR China; National & local Joint Engineering Research Center of Harbor Oil & Gas Storage and Transportation Technology, Zhejiang Ocean University, Zhoushan 316022, PR China
| | - Zhenzhen Li
- Zhejiang Key Laboratory of Petrochemical Environmental Pollution, Zhejiang Ocean University, Zhoushan 316022, PR China; School of Marine Science & Technology, Zhejiang Ocean University, Zhoushan 316022, PR China
| | - Yu Chen
- Zhejiang Key Laboratory of Petrochemical Environmental Pollution, Zhejiang Ocean University, Zhoushan 316022, PR China; School of Marine Science & Technology, Zhejiang Ocean University, Zhoushan 316022, PR China
| | - Mei Liu
- Zhejiang Key Laboratory of Petrochemical Environmental Pollution, Zhejiang Ocean University, Zhoushan 316022, PR China
| | - Qiao Yang
- Zhejiang Key Laboratory of Petrochemical Environmental Pollution, Zhejiang Ocean University, Zhoushan 316022, PR China
| | - Baikang Zhu
- Zhejiang Key Laboratory of Petrochemical Environmental Pollution, Zhejiang Ocean University, Zhoushan 316022, PR China; National & local Joint Engineering Research Center of Harbor Oil & Gas Storage and Transportation Technology, Zhejiang Ocean University, Zhoushan 316022, PR China
| | - Jun Mu
- College of Ecology and Environment, Hainan Tropical Ocean University, Sanya 572022, PR China.
| | - Lijuan Feng
- Zhejiang Key Laboratory of Petrochemical Environmental Pollution, Zhejiang Ocean University, Zhoushan 316022, PR China; National & local Joint Engineering Research Center of Harbor Oil & Gas Storage and Transportation Technology, Zhejiang Ocean University, Zhoushan 316022, PR China
| | - Zhi Chen
- Department of Building, Civil and Environmental Engineering, Faculty of Engineering & Computer Sciences, Concordia University, Montreal, Quebec H3G1M8, Canada
| |
Collapse
|
4
|
Min J, Fang S, Peng J, Lv X, Xu L, Li Y, Hu X. Microbial detoxification of 2,4,6-tribromophenol via a novel process with consecutive oxidative and hydrolytic debromination: Biochemical, genetic and evolutionary characterization. ENVIRONMENTAL RESEARCH 2022; 205:112494. [PMID: 34890595 DOI: 10.1016/j.envres.2021.112494] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Revised: 11/26/2021] [Accepted: 12/01/2021] [Indexed: 06/13/2023]
Abstract
As a typical brominated flame retardants (BFRs), 2,4,6-tribromophenol (TBP) has serious hazard to the environmental health and its environmental fate has attracted considerable attention. Dehalogenation reaction plays key role in microbial TBP degradation and detoxification. So far, several halophenols-degrading enzymes have been reported to transform their substrate by oxidative dehalogenation; however, the molecular and biochemistry characterization of microbial hydrolytic dehalogenation is limited. In this study, Cupriavidus sp. CNP-8 with high TBP degradation activity was found to degrade TBP via an obviously differnet pathway as compared to other reported TBP-degraders. The transcription of hnp genes were significantly upregulated with TBP stimulation, indicating their involvment in TBP degradation. Enzymatic assays with 18O-labeling experiments showed that HnpAB, a two-component FAD-dependent monooxygenase, transformed TBP via consecutive oxidative and hydrolytic debromination reactions with the formation of 6-bromo-1,2,4-benzenetriol (BBT) as the ring-cleavage substrate. The function of the BBT ring-cleavage enzyme (HnpC) was also characterized both in vitro and in vivo. This finding provides new molecular mechanism of microbial detoxification of TBP and novel information of the environmental fate of this BFRs. Furthermore, to investigate the frequency of this novel dehalogenation mechanism in microbes, we also analyzed the distribution as well as the genetic structure of the hnpABC cluster by comparative genomics. Although hnpA homolog is distributed in several bacterial genera including Cupriavidus, Paraburkholderia, Variovorax and Streptomyces, the complete hnpABC cluster is only retrieved from Cupriavidus and strictly conservative in the genomes. This indicated that Cupriavidus have unique evolutionary pattern in acquiring the hnpABC to degrade TBP and its analogs, enhancing our understanding of the microbial adaptive evolution in halophenols-contaminated environment.
Collapse
Affiliation(s)
- Jun Min
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China
| | - Suyun Fang
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, China
| | - Jian Peng
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, China
| | - Xin Lv
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, China
| | - Lingxue Xu
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, China
| | - Yan Li
- College of Life Science of Yantai University, Yantai, China
| | - Xiaoke Hu
- Key Laboratory of Coastal Biology and Bioresource Utilization, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, China; Laboratory for Marine Biology and Biotechnology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, China; Center for Ocean Mega-Science, Chinese Academy of Sciences, Qingdao, China.
| |
Collapse
|
5
|
Barbance A, Della-Negra O, Chaussonnerie S, Delmas V, Muselet D, Ugarte E, Saaidi PL, Weissenbach J, Fischer C, Le Paslier D, Fonknechten N. Genetic Analysis of Citrobacter sp.86 Reveals Involvement of Corrinoids in Chlordecone and Lindane Biotransformations. Front Microbiol 2020; 11:590061. [PMID: 33240246 PMCID: PMC7680753 DOI: 10.3389/fmicb.2020.590061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Accepted: 10/13/2020] [Indexed: 01/21/2023] Open
Abstract
Chlordecone (Kepone®) and γ-hexachlorocyclohexane (γ-HCH or lindane) have been used for decades in the French West Indies (FWI) resulting in long-term soil and water pollution. In a previous work, we have identified a new Citrobacter species (sp.86) that is able to transform chlordecone into numerous products under anaerobic conditions. No homologs to known reductive dehalogenases or other candidate genes were found in the genome sequence of Citrobacter sp.86. However, a complete anaerobic pathway for cobalamin biosynthesis was identified. In this study, we investigated whether cobalamin or intermediates of cobalamin biosynthesis was required for chlordecone microbiological transformation. For this purpose, we constructed a set of four Citrobacter sp.86 mutant strains defective in several genes belonging to the anaerobic cobalamin biosynthesis pathway. We monitored chlordecone and its transformation products (TPs) during long-term incubation in liquid cultures under anaerobic conditions. Chlordecone TPs were detected in the case of cobalamin-producing Citrobacter sp.86 wild-type strain but also in the case of mutants able to produce corrinoids devoid of lower ligand. In contrast, mutants unable to insert the cobalt atom in precorrin-2 did not induce any transformation of chlordecone. In addition, it was found that lindane, previously shown to be anaerobically transformed by Citrobacter freundii without evidence of a mechanism, was also degraded in the presence of the wild-type strain of Citrobacter sp.86. The lindane degradation abilities of the various Citrobacter sp.86 mutant strains paralleled chlordecone transformation. The present study shows the involvement of cobalt-containing corrinoids in the microbial degradation of chlorinated compounds with different chemical structures. Their increased production in contaminated environments could accelerate the decontamination processes.
Collapse
Affiliation(s)
- Agnès Barbance
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
| | - Oriane Della-Negra
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
| | - Sébastien Chaussonnerie
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
| | - Valérie Delmas
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
| | - Delphine Muselet
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
| | - Edgardo Ugarte
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
| | - Pierre-Loïc Saaidi
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
| | - Jean Weissenbach
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
| | - Cécile Fischer
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
| | - Denis Le Paslier
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
- Denis Le Paslier,
| | - Nuria Fonknechten
- Génomique Métabolique, Genoscope, Institut François Jacob, CEA, CNRS, Univ Evry, Université Paris-Saclay, Evry, France
- Laboratoire de Cancérologie Expérimentale, IRCM, Institut François Jacob, CEA, Université Paris-Saclay, Fontenay aux Roses, France
- *Correspondence: Nuria Fonknechten,
| |
Collapse
|
6
|
Oyewusi HA, Wahab RA, Huyop F. Dehalogenase-producing halophiles and their potential role in bioremediation. MARINE POLLUTION BULLETIN 2020; 160:111603. [PMID: 32919122 DOI: 10.1016/j.marpolbul.2020.111603] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 08/21/2020] [Accepted: 08/23/2020] [Indexed: 06/11/2023]
Abstract
This review aims to briefly describe the potential role of dehalogenase-producing halophilic bacteria in decontamination of organohalide pollutants. Hypersaline habitats pose challenges to life because of low water activity (water content) and is considered as the largest and ultimate sink for pollutants due to naturally and anthropogenic activities in which a substantial amount of ecological contaminants are organohalides. Several such environments appear to host and support substantial diversity of extremely halophilic and halotolerant bacteria as well as halophilic archaea. Biodegradation of several toxic inorganic and organic compounds in both aerobic and anaerobic conditions are carried out by halophilic microbes. Therefore, remediation of polluted marine/hypersaline environments are the main scorching issues in the field of biotechnology. Although many microbial species are reported as effective pollutants degrader, but little has been isolated from marine/hypersaline environments. Therefore, more novel microbial species with dehalogenase-producing ability are still desired.
Collapse
Affiliation(s)
- Habeebat Adekilekun Oyewusi
- Department of Biosciences, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia; Enzyme Technology and Green Synthesis Group, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia; Department of Biochemistry, School of Science and Computer Studies, Federal Polytechnic Ado Ekiti, PMB, 5351, Ekiti State, Nigeria
| | - Roswanira Abdul Wahab
- Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia; Enzyme Technology and Green Synthesis Group, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia
| | - Fahrul Huyop
- Department of Biosciences, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia; Enzyme Technology and Green Synthesis Group, Faculty of Science, Universiti Teknologi Malaysia, 81310 UTM Johor Bahru, Johor, Malaysia.
| |
Collapse
|
7
|
Transformation of the recalcitrant pesticide chlordecone by Desulfovibrio sp.86 with a switch from ring-opening dechlorination to reductive sulfidation activity. Sci Rep 2020; 10:13545. [PMID: 32782344 PMCID: PMC7419502 DOI: 10.1038/s41598-020-70124-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2020] [Accepted: 07/21/2020] [Indexed: 01/21/2023] Open
Abstract
The insecticide chlordecone has been used in the French West Indies for decades, resulting in long term pollution, human health problems and social crisis. In addition to bacterial consortia and Citrobacter sp.86 previously described to transform chlordecone into three families of transformation products (A: hydrochlordecones, B: polychloroindenes and C: polychloroindenecarboxylic acids), another bacterium Desulfovibrio sp.86, showing the same abilities has been isolated and its genome was sequenced. Ring-opening dechlorination, leading to A, B and C families, was observed as previously described. Changing operating conditions in the presence of chlordecone gave rise to the formation of an unknown sulfur-containing transformation product instead of the aforementioned ones. Its structural elucidation enabled to conclude to a thiol derivative, which corresponds to an undocumented bacterial reductive sulfidation. Microbial experiments pointed out that the chlordecone thiol derivative was observed in anaerobiosis, and required the presence of an electron acceptor containing sulfur or hydrogen sulfide, in a confined atmosphere. It seems that this new reaction is also active on hydrochlordecones, as the 10-monohydrochlordecone A1 was transformed the same way. Moreover, the chlordecone thiol derivative called F1 was detected in several chlordecone contaminated mangrove bed sediments from Martinique Island, highlighting the environmental relevance of these results.
Collapse
|
8
|
Enhancement of tribromophenol removal in a sequencing batch reactor via submicron magnetite. Bioprocess Biosyst Eng 2020; 43:851-861. [DOI: 10.1007/s00449-020-02281-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Accepted: 01/01/2020] [Indexed: 10/25/2022]
|
9
|
Genome-Guided Identification of Organohalide-Respiring Deltaproteobacteria from the Marine Environment. mBio 2018; 9:mBio.02471-18. [PMID: 30563901 PMCID: PMC6299228 DOI: 10.1128/mbio.02471-18] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
The marine environment is a major reservoir for both anthropogenic and natural organohalides, and reductive dehalogenation is thought to be an important process in the overall cycling of these compounds. Here we demonstrate that the capacity of organohalide respiration appears to be widely distributed in members of marine Deltaproteobacteria. The identification of reductive dehalogenase genes in diverse Deltaproteobacteria and the confirmation of their dehalogenating activity through functional assays and transcript analysis in select isolates extend our knowledge of organohalide-respiring Deltaproteobacteria diversity. The presence of functional reductive dehalogenase genes in diverse Deltaproteobacteria implies that they may play an important role in organohalide respiration in the environment. Organohalide compounds are widespread in the environment as a result of both anthropogenic activities and natural production. The marine environment, in particular, is a major reservoir of organohalides, and reductive dehalogenation is thought to be an important process in the overall cycling of these compounds. Deltaproteobacteria are important members of the marine microbiota with diverse metabolic capacities, and reductive dehalogenation has been observed in some Deltaproteobacteria. In this study, a comprehensive survey of Deltaproteobacteria genomes revealed that approximately 10% contain reductive dehalogenase (RDase) genes, which are found within a common gene neighborhood. The dehalogenating potential of select RDase A-containing Deltaproteobacteria and their gene expression were experimentally verified. Three Deltaproteobacteria strains isolated from marine environments representing diverse species, Halodesulfovibrio marinisediminis, Desulfuromusa kysingii, and Desulfovibrio bizertensis, were shown to reductively dehalogenate bromophenols and utilize them as terminal electron acceptors in organohalide respiration. Their debrominating activity was not inhibited by sulfate or elemental sulfur, and these species are either sulfate- or sulfur-reducing bacteria. The analysis of RDase A gene transcripts indicated significant upregulation induced by 2,6-dibromophenol. This study extends our knowledge of the phylogenetic diversity of organohalide-respiring bacteria and their functional RDase A gene diversity. The identification of reductive dehalogenase genes in diverse Deltaproteobacteria and confirmation of their organohalide-respiring capability suggest that Deltaproteobacteria play an important role in natural organohalide cycling.
Collapse
|
10
|
King GM. Microbiomes of the Enteropneust, Saccoglossus bromophenolosus, and Associated Marine Intertidal Sediments of Cod Cove, Maine. Front Microbiol 2018; 9:3066. [PMID: 30631312 PMCID: PMC6315191 DOI: 10.3389/fmicb.2018.03066] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Accepted: 11/28/2018] [Indexed: 11/13/2022] Open
Abstract
Enteropneusts are widely distributed marine invertebrates that accumulate high concentrations of halogenated aromatics. Some of these compounds affect benthic biogeochemistery (e.g., denitrification and ammonia oxidation), but little is known about interactions between enteropneusts and their associated microbial communities. Even less is known about enteropneust host-microbe relationships in the digestive tract. More generally, microbial community composition and diversity in intertidal sediments have received little attention. In this study, high throughput sequence analyses of 16S rRNA genes extracted from microbial communities associated with sediment-free whole individuals of Saccoglossus bromophenolosus and freshly excreted S. bromophenolosus gut sediments revealed a potential Spirochaete symbiont that was abundant, present in gut sediment, but absent in other sediments. Relative to surface sediments, gut communities also revealed evidence for selective losses of some groups and blooms of others, especially Colwellia, Photobacterium, Pseudoalteromonas, and Vibrio. After deposition, gut sediment communities rapidly resembled those of surface sediments. Although hierarchical cluster analysis and Linear Discriminant Analysis Effect Size (LEfSe) differentiated among burrow walls of S. bromophenolosus and a polychaete, Alitta virens, as well as between surface and sub-surface sediments, most operational taxonomic units (OTUs) were shared, with differences largely occurring in relative abundances. This suggests that sediment mixing through bioturbation might act to homogenize community composition, while species-specific impacts by infauna might alter local population abundances. Although Cod Cove is a relatively isolated intertidal system, microbial community members included groups with cosmopolitan distributions and roles in sulfur cycling, e.g., Gammaproteobacteria BD7 and Sva0071, as well as novel OTUs representing a large number of phyla.
Collapse
Affiliation(s)
- Gary M King
- Department of Biological Sciences, Louisiana State University, Baton Rouge, LA, United States
| |
Collapse
|
11
|
Golan R, Gelman F, Kuder T, Taylor AA, Ronen Z, Bernstein A. Degradation of 4-bromophenol by Ochrobactrum sp. HI1 isolated from desert soil: pathway and isotope effects. Biodegradation 2018; 30:37-46. [DOI: 10.1007/s10532-018-9860-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Accepted: 10/16/2018] [Indexed: 12/01/2022]
|
12
|
Koch C, Sures B. Environmental concentrations and toxicology of 2,4,6-tribromophenol (TBP). ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2018; 233:706-713. [PMID: 29126092 DOI: 10.1016/j.envpol.2017.10.127] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 10/29/2017] [Accepted: 10/29/2017] [Indexed: 06/07/2023]
Abstract
2,4,6-Tribromophenol is the most widely produced brominated phenol. In the present review, we summarize studies dealing with this substance from an environmental point of view. We cover concentrations in the abiotic and biotic environment including humans, toxicokinetics as well as toxicodynamics, and show gaps of the current knowledge about this chemical. 2,4,6-Tribomophenol occurs as an intermediate during the synthesis of brominated flame retardants and it similarly represents a degradation product of these substances. Moreover, it is used as a pesticide but also occurs as a natural product of some aquatic organisms. Due to its many sources, 2,4,6-tribromophenol is ubiquitously found in the environment. Nevertheless, not much is known about its toxicokinetics and toxicodynamics. It is also unclear which role the structural isomer 2,4,5-tribromophenol and several degradation products such as 2,4-dibromophenol play in the environment. Due to new flame retardants that enter the market and can degrade to 2,4,6-tribromophenol, this compound will remain relevant in future years - not only in aquatic matrices, but also in house dust and foodstuff, which are an important exposure route for humans.
Collapse
Affiliation(s)
- Christoph Koch
- Aquatic Ecology and Centre for Water and Environmental Research (ZWU), University Duisburg-Essen, 45141 Essen, Germany; Deutsche Rockwool GmbH & Co. KG, 45966 Gladbeck, Germany.
| | - Bernd Sures
- Aquatic Ecology and Centre for Water and Environmental Research (ZWU), University Duisburg-Essen, 45141 Essen, Germany
| |
Collapse
|
13
|
Atashgahi S, Häggblom MM, Smidt H. Organohalide respiration in pristine environments: implications for the natural halogen cycle. Environ Microbiol 2017; 20:934-948. [PMID: 29215190 DOI: 10.1111/1462-2920.14016] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 11/29/2017] [Accepted: 12/01/2017] [Indexed: 11/29/2022]
Abstract
Halogenated organic compounds, also termed organohalogens, were initially considered to be of almost exclusively anthropogenic origin. However, over 5000 naturally synthesized organohalogens are known today. This has also fuelled the hypothesis that the natural and ancient origin of organohalogens could have primed development of metabolic machineries for their degradation, especially in microorganisms. Among these, a special group of anaerobic microorganisms was discovered that could conserve energy by reducing organohalogens as terminal electron acceptor in a process termed organohalide respiration. Originally discovered in a quest for biodegradation of anthropogenic organohalogens, these organohalide-respiring bacteria (OHRB) were soon found to reside in pristine environments, such as the deep subseafloor and Arctic tundra soil with limited/no connections to anthropogenic activities. As such, accumulating evidence suggests an important role of OHRB in local natural halogen cycles, presumably taking advantage of natural organohalogens. In this minireview, we integrate current knowledge regarding the natural origin and occurrence of industrially important organohalogens and the evolution and spread of OHRB, and describe potential implications for natural halogen and carbon cycles.
Collapse
Affiliation(s)
- Siavash Atashgahi
- Laboratory of Microbiology, Wageningen University & Research, Stippeneng 4, Wageningen 6708 WE, The Netherlands
| | - Max M Häggblom
- Department of Biochemistry and Microbiology, School of Environmental and Biological Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ, 08901, USA
| | - Hauke Smidt
- Laboratory of Microbiology, Wageningen University & Research, Stippeneng 4, Wageningen 6708 WE, The Netherlands
| |
Collapse
|
14
|
Peng X, Wang Z, Wei D, Huang Q, Jia X. Biodegradation of tetrabromobisphenol A in the sewage sludge process. J Environ Sci (China) 2017; 61:39-48. [PMID: 29191314 DOI: 10.1016/j.jes.2017.02.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 02/17/2017] [Accepted: 03/08/2017] [Indexed: 06/07/2023]
Abstract
Anaerobic sewage sludge capable of rapidly degrading tetrabromobisphenol A (TBBPA) was successfully acclimated in an anaerobic reactor over 280days. During the period from 0 to 280days, the TBBPA degradation rate (DR), utilization of glucose, and VSS were monitored continuously. After 280days of acclimation, the TBBPA DR of active sludge reached 96.0% after 20days of treatment in batch experiments. Based on scanning electron microscopy (SEM) observations and denaturing gradient gel electrophoresis (DGGE) determinations, the diversity of the microorganisms after 0 and 280days in the acclimated anaerobic sewage sludge was compared. Furthermore, eleven metabolites, including 2-bromophenol, 3-bromophenol, 2,4-dibromophenol, 2,6-dibromophenol, tribromophenol and bisphenol A, were identified by gas chromatography-mass spectrometry (GC-MS). Moreover, the six primary intermediary metabolites were also well-degraded by the acclimated anaerobic sewage sludge to varying degrees. Among the six target metabolites, tribromophenol was the most preferred substrate for biodegradation via debromination. These metabolites degraded more rapidly than monobromide and bisphenol A. The biodegradation data of the intermediary metabolites exhibited a good fit to a pseudo-first-order model. Finally, based on the metabolites, metabolic pathways were proposed. In conclusion, the acclimated microbial consortia degraded TBBPA and its metabolites well under anaerobic conditions.
Collapse
Affiliation(s)
- Xingxing Peng
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China.
| | - Zhangna Wang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Dongyang Wei
- South China Institute of Environmental Sciences, Guangzhou 510655, China
| | - Qiyuan Huang
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
| | - Xiaoshan Jia
- School of Environmental Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology, Guangzhou 510275, China.
| |
Collapse
|
15
|
Liu J, Lopez N, Ahn Y, Goldberg T, Bromberg Y, Kerkhof LJ, Häggblom MM. Novel reductive dehalogenases from the marine sponge associated bacterium Desulfoluna spongiiphila. ENVIRONMENTAL MICROBIOLOGY REPORTS 2017; 9:537-549. [PMID: 28618195 DOI: 10.1111/1758-2229.12556] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2017] [Revised: 05/08/2017] [Accepted: 06/03/2017] [Indexed: 06/07/2023]
Abstract
Desulfoluna spongiiphila strain AA1 is an organohalide respiring bacterium, isolated from the marine sponge Aplysina aerophoba, that can use brominated and iodinated phenols, in addition to sulfate and thiosulfate as terminal electron acceptors. The genome of Desulfoluna spongiiphila strain AA1 is approximately 6.5 Mb. Three putative reductive dehalogenase (rdhA) genes involved in respiratory metabolism of organohalides were identified within the sequence. Conserved motifs found in respiratory reductive dehalogenases (a twin arginine translocation signal sequence and two iron-sulfur clusters) were present in all three putative AA1 rdhA genes. Transcription of one of the three rdhA genes was significantly upregulated during respiration of 2,6-dibromophenol and sponge extracts. Strain AA1 appears to have the ability to synthesize cobalamin, the key cofactor of most characterized reductive dehalogenase enzymes. The genome contains genes involved in cobalamin synthesis and uptake and can grow without cobalamin supplementation. Identification of this target gene associated with debromination lays the foundation for understanding how dehalogenating bacteria control the fate of organohalide compounds in sponges and their role in a symbiotic organobromine cycle. In the sponge environment, D. spongiiphila strain AA1 may thus take advantage of both brominated compounds and sulfate as electron acceptors for respiration.
Collapse
Affiliation(s)
- Jie Liu
- Departments of Biochemistry and Microbiology, School of Environmental and Biological Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901, USA
| | - Nora Lopez
- Departments of Biochemistry and Microbiology, School of Environmental and Biological Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901, USA
- Marine and Coastal Sciences, School of Environmental and Biological Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901, USA
| | - Youngbeom Ahn
- Departments of Biochemistry and Microbiology, School of Environmental and Biological Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901, USA
| | - Tatyana Goldberg
- Department for Bioinformatics and Computational Biology, Technical University Munich, Garching, 85748, Germany
| | - Yana Bromberg
- Departments of Biochemistry and Microbiology, School of Environmental and Biological Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901, USA
| | - Lee J Kerkhof
- Marine and Coastal Sciences, School of Environmental and Biological Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901, USA
| | - Max M Häggblom
- Departments of Biochemistry and Microbiology, School of Environmental and Biological Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901, USA
| |
Collapse
|
16
|
Affiliation(s)
- Maeva Fincker
- Department of Civil and Environmental Engineering and Department of Chemical Engineering, Stanford University, Stanford, California 94305;,
| | - Alfred M. Spormann
- Department of Civil and Environmental Engineering and Department of Chemical Engineering, Stanford University, Stanford, California 94305;,
| |
Collapse
|
17
|
Zhao HX, Jiang JQ, Wang YL, Xie Q, Qu BC. Phototransformation of 2,4,6-tribromophenol in aqueous solution: Kinetics and photolysis products. JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART A, TOXIC/HAZARDOUS SUBSTANCES & ENVIRONMENTAL ENGINEERING 2017; 52:45-54. [PMID: 27726494 DOI: 10.1080/10934529.2016.1229926] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
In this research, we studied the phototransformation of 2,4,6-tribromophenol (TBP) by UV irradiation in aqueous solution. Effects of typical environmental factors (i.e., pH and the initial concentration of TBP, Fe3+ and NO2-) were also investigated. Results showed that the transformation process followed pseudo-first-order kinetics. The transformation rate constant of TBP decreased with increasing initial concentration and increased with increasing Fe3+ and NO2- concentrations as well as increasing pH. Ten photoproducts were tentatively identified after irradiation of TBP, according to HPLC-LTQ-Orbitrap MS and GC/MS analysis. Among them, two dihydroxylated dibromobenzene compounds (di-OH-DBB) were found to be predominant over the reaction time, indicating that hydrodebromination of TBP could be the main phototransformation mechanism. In addition, the identification of eight OH-PBDEs and di-OH-PBBs suggested that photodimerization might also be a reaction pathway for TBP photochemical reactions.
Collapse
Affiliation(s)
- Hong X Zhao
- a Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education) , School of Environmental Science and Technology, Dalian University of Technology , Dalian , China
| | - Jing Q Jiang
- a Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education) , School of Environmental Science and Technology, Dalian University of Technology , Dalian , China
| | - Yan L Wang
- a Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education) , School of Environmental Science and Technology, Dalian University of Technology , Dalian , China
| | - Qing Xie
- a Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education) , School of Environmental Science and Technology, Dalian University of Technology , Dalian , China
| | - Bao C Qu
- b Dalian Institute of Food Inspection , Dalian , China
| |
Collapse
|
18
|
Xiong J, Li G, An T. The microbial degradation of 2,4,6-tribromophenol (TBP) in water/sediments interface: Investigating bioaugmentation using Bacillus sp. GZT. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 575:573-580. [PMID: 27613672 DOI: 10.1016/j.scitotenv.2016.09.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Revised: 08/31/2016] [Accepted: 09/02/2016] [Indexed: 06/06/2023]
Abstract
The substance 2,4,6-Tribromophenol (TBP) is used as a flame retardant in electronic and electric devices, and is a replacement for pentachlorophenol in wood preservation. TBP is a contaminant in different environmental matrices, at levels where treatment is required. This study examined the relationship between the bioaugmention of TBP degradation and the evolution of the microbial community in river water/sediment microcosms. When compared with unamended controls, bioaugmentation with Bacillus sp. GZT effectively enhanced TBP biodegradation, with approximately 40.7% of the TBP removal after a 7-week incubation period, without a lag phase (p<0.01). Amendments with 2-bromophenol, 2,6-dibromophenol, and 2,4-dibromophenol did not promote TBP biodegradation in river water/sediments (p>0.05). However, TBP biodegradation was enhanced by adding other additives, including NaCl, humic acid, sodium lactate, and sodium propionate alone, especially glucose and yeast extract. A metagenomics analysis of the total 16S rRNA genes from the treatment system with bioaugmentation showed that four microbial phyla were dominant: Proteobacteria (52.08-66.22%), Actinobacteria (20.03-5.47%), Bacteroidetes (6.68-13.68%), and Firmicutes (4.53-20.83%). This study highlights the possible benefits using bioaugmentation with GZT to remediate TBP-polluted water and sediments.
Collapse
Affiliation(s)
- Jukun Xiong
- State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guiying Li
- Institute of Environmental Health and Pollution Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
| | - Taicheng An
- State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Protection and Resources Utilization, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; Institute of Environmental Health and Pollution Control, School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China.
| |
Collapse
|
19
|
Lefevre E, Cooper E, Stapleton HM, Gunsch CK. Characterization and Adaptation of Anaerobic Sludge Microbial Communities Exposed to Tetrabromobisphenol A. PLoS One 2016; 11:e0157622. [PMID: 27463972 PMCID: PMC4963083 DOI: 10.1371/journal.pone.0157622] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 06/02/2016] [Indexed: 11/22/2022] Open
Abstract
The increasing occurrence of tetrabromobisphenol A (TBBPA) in the environment is raising questions about its potential ecological and human health impacts. TBBPA is microbially transformed under anaerobic conditions to bisphenol A (BPA). However, little is known about which taxa degrade TBBPA and the adaptation of microbial communities exposed to TBBPA. The objectives of this study were to characterize the effect of TBBPA on microbial community structure during the start-up phase of a bench-scale anaerobic sludge reactor, and identify taxa that may be associated with TBBPA degradation. TBBPA degradation was monitored using LC/MS-MS, and the microbial community was characterized using Ion Torrent sequencing and qPCR. TBBPA was nearly completely transformed to BPA via reductive debromination in 55 days. Anaerobic reactor performance was not negatively affected by the presence of TBBPA and the bulk of the microbial community did not experience significant shifts. Several taxa showed a positive response to TBBPA, suggesting they may be associated with TBBPA degradation. Some of these taxa had been previously identified as dehalogenating bacteria including Dehalococcoides, Desulfovibrio, Propionibacterium, and Methylosinus species, but most had not previously been identified as having dehalogenating capacities. This study is the first to provide in-depth information on the microbial dynamics of anaerobic microbial communities exposed to TBBPA.
Collapse
Affiliation(s)
- Emilie Lefevre
- Department of Civil and Environmental Engineering, Duke University, Durham, NC, United States of America
| | - Ellen Cooper
- Nicholas School of the Environment, Duke University, Durham, NC, United States of America
| | - Heather M. Stapleton
- Nicholas School of the Environment, Duke University, Durham, NC, United States of America
| | - Claudia K. Gunsch
- Department of Civil and Environmental Engineering, Duke University, Durham, NC, United States of America
| |
Collapse
|
20
|
Microbial dehalogenation of organohalides in marine and estuarine environments. Curr Opin Biotechnol 2015; 33:287-95. [DOI: 10.1016/j.copbio.2015.03.013] [Citation(s) in RCA: 84] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2014] [Revised: 03/19/2015] [Accepted: 03/23/2015] [Indexed: 11/22/2022]
|
21
|
Song M, Luo C, Li F, Jiang L, Wang Y, Zhang D, Zhang G. Anaerobic degradation of polychlorinated biphenyls (PCBs) and polychlorinated biphenyls ethers (PBDEs), and microbial community dynamics of electronic waste-contaminated soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2015; 502:426-33. [PMID: 25268572 DOI: 10.1016/j.scitotenv.2014.09.045] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 09/12/2014] [Accepted: 09/15/2014] [Indexed: 05/10/2023]
Abstract
Environmental contamination caused by electronic waste (e-waste) recycling is attracting increasing attention worldwide because of the threats posed to ecosystems and human safety. In the present study, we investigated the feasibility of in situ bioremediation of e-waste-contaminated soils. We found that, in the presence of lactate as an electron donor, higher halogenated congeners were converted to lower congeners via anaerobic halorespiration using ferrous ions in contaminated soil. The 16S rRNA gene sequences of terminal restriction fragments indicated that the three dominant strains were closely related to known dissimilatory iron-reducing bacteria (DIRB) and those able to perform dehalogenation upon respiration. The functional species performed the activities of ferrous oxidation to ferric ions and further ferrous reduction for dehalogenation. The present study links iron cycling to degradation of halogenated materials in natural e-waste-contaminated soil, and highlights the synergistic roles of soil bacteria and ferrous/ferric ion cycling in the dehalogenation of polychlorinated biphenyls (PCBs) and polybrominated biphenyl ethers (PBDEs).
Collapse
Affiliation(s)
- Mengke Song
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; Graduate University of Chinese Academy of Sciences, Beijing 100039, China
| | - Chunling Luo
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China.
| | - Fangbai Li
- Guangdong Institute of Eco-environmental and Soil Sciences, Guangzhou 510650, China
| | - Longfei Jiang
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; College of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China
| | - Yan Wang
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Dayi Zhang
- Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, UK
| | - Gan Zhang
- Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| |
Collapse
|
22
|
Li Z, Yoshida N, Wang A, Nan J, Liang B, Zhang C, Zhang D, Suzuki D, Zhou X, Xiao Z, Katayama A. Anaerobic mineralization of 2,4,6-tribromophenol to CO2 by a synthetic microbial community comprising Clostridium, Dehalobacter, and Desulfatiglans. BIORESOURCE TECHNOLOGY 2015; 176:225-232. [PMID: 25461007 DOI: 10.1016/j.biortech.2014.10.097] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Revised: 10/13/2014] [Accepted: 10/18/2014] [Indexed: 06/04/2023]
Abstract
Anaerobic mineralization of 2,4,6-tribromophenol (2,4,6-TBP) was achieved by a synthetic anaerobe community comprising a highly enriched culture of Dehalobacter sp. phylotype FTH1 acting as a reductive debrominator; Clostridium sp. strain Ma13 acting as a hydrogen supplier via glucose fermentation; and a novel 4-chlorophenol-degrading anaerobe, Desulfatiglans parachlorophenolica strain DS. 2,4,6-TBP was debrominated to phenol by the combined action of Ma13 and FTH1, then mineralized into CO2 by sequential introduction of DS, confirmed using [ring-(14)C(U)] phenol. The optimum concentrations of glucose, SO4(2-), and inoculum densities were 0.5 or 2.5mM, 1.0 or 2.5mM, and the densities equivalent to 10(4)copiesmL(-1) of the 16S rRNA genes, respectively. This resulted in the complete mineralization of 23μM 2,4,6-TBP within 35days (0.58μmolL(-1)d(-1)). Thus, using a synthetic microbial community of isolates or highly enriched cultures would be an efficient, optimizable, low-cost strategy for anaerobic bioremediation of halogenated aromatics.
Collapse
Affiliation(s)
- Zhiling Li
- State Key Laboratory of Urban Water Resources and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin 150090, China; EcoTopia Science Institute, Nagoya University, Chikusa, Nagoya 464-8603, Japan
| | - Naoko Yoshida
- Center for Fostering Young and Innovative Researchers, Nagoya Institute of Technology, Syowa, Nagoya 466-8555, Japan
| | - Aijie Wang
- State Key Laboratory of Urban Water Resources and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin 150090, China; Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Jun Nan
- State Key Laboratory of Urban Water Resources and Environment, Harbin Institute of Technology (SKLUWRE, HIT), Harbin 150090, China
| | - Bin Liang
- Key Laboratory of Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China
| | - Chunfang Zhang
- EcoTopia Science Institute, Nagoya University, Chikusa, Nagoya 464-8603, Japan
| | - Dongdong Zhang
- Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan
| | - Daisuke Suzuki
- EcoTopia Science Institute, Nagoya University, Chikusa, Nagoya 464-8603, Japan
| | - Xue Zhou
- Graduate School of Environmental Studies, Nagoya University, Nagoya 464-8601, Japan
| | - Zhixing Xiao
- Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan
| | - Arata Katayama
- EcoTopia Science Institute, Nagoya University, Chikusa, Nagoya 464-8603, Japan; Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan; Graduate School of Environmental Studies, Nagoya University, Nagoya 464-8601, Japan.
| |
Collapse
|
23
|
Oba Y, Futagami T, Amachi S. Enrichment of a microbial consortium capable of reductive deiodination of 2,4,6-triiodophenol. J Biosci Bioeng 2014; 117:310-7. [DOI: 10.1016/j.jbiosc.2013.08.011] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2013] [Revised: 08/13/2013] [Accepted: 08/20/2013] [Indexed: 12/01/2022]
|
24
|
The Effect of Microbial Activity on Biodegradation of 2,4,6-Tribromophenol and Flow in Naturally Fractured Chalk Cores. ACTA ACUST UNITED AC 2013. [DOI: 10.1029/162gm18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
|
25
|
Sultana N, Saify ZS. Enzymatic biotransformation of terpenes as bioactive agents. J Enzyme Inhib Med Chem 2012; 28:1113-28. [DOI: 10.3109/14756366.2012.727411] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Affiliation(s)
- Nighat Sultana
- Pharmaceutical Research Center, PCSIR Laboratories Complex,
Karachi, Pakistan
| | - Zafar Saeed Saify
- International Center for Chemical Sciences, H.E.J. Research Institute of Chemistry, University of Karachi,
Karachi, Pakistan
| |
Collapse
|
26
|
Besaury L, Ouddane B, Pavissich JP, Dubrulle-Brunaud C, González B, Quillet L. Impact of copper on the abundance and diversity of sulfate-reducing prokaryotes in two chilean marine sediments. MARINE POLLUTION BULLETIN 2012; 64:2135-2145. [PMID: 22921896 DOI: 10.1016/j.marpolbul.2012.07.042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2012] [Revised: 07/10/2012] [Accepted: 07/19/2012] [Indexed: 06/01/2023]
Abstract
We studied the abundance and diversity of the sulfate-reducing prokaryotes (SRPs) in two 30-cm marine chilean sediment cores, one with a long-term exposure to copper-mining residues, the other being a non-exposed reference sediment. The abundance of SRPs was quantified by qPCR of the dissimilatory sulfite reductase gene β-subunit (dsrB) and showed that SRPs are sensitive to high copper concentrations, as the mean number of SRPs all along the contaminated sediment was two orders of magnitude lower than in the reference sediment. SRP diversity was analyzed by using the dsrB-sequences-based PCR-DGGE method and constructing gene libraries for dsrB-sequences. Surprisingly, the diversity was comparable in both sediments, with dsrB sequences belonging to Desulfobacteraceae, Syntrophobacteraceae, and Desulfobulbaceae, SRP families previously described in marine sediments, and to a deep branching dsrAB lineage. The hypothesis of the presence of horizontal transfer of copper resistance genes in the microbial population of the polluted sediment is discussed.
Collapse
Affiliation(s)
- Ludovic Besaury
- Faculté des Sciences, Université de Rouen, CNRS UMR 6143-M2C, Groupe de Microbiologie, Place Emile Blondel, 76821 Mont Saint Aignan Cedex, France.
| | | | | | | | | | | |
Collapse
|
27
|
Wagner A, Cooper M, Ferdi S, Seifert J, Adrian L. Growth of Dehalococcoides mccartyi strain CBDB1 by reductive dehalogenation of brominated benzenes to benzene. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:8960-8968. [PMID: 22800291 DOI: 10.1021/es3003519] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Brominated aromatics are used in many different applications but occur also naturally. Here, we demonstrate organohalide respiration and growth of Dehalococcoides mccartyi strain CBDB1 with 1,2,4-tribromobenzene, all three dibrominated benzene congeners and monobromobenzene. All bromobenzenes were fully dehalogenated to benzene. Growth yields were between 1.8 × 10(14) and 2.8 × 10(14) cells per mol of bromide released. Furthermore, a newly designed high-throughput methyl viologen-based photometric microtiter plate assay was established to determine the activity of the reductive dehalogenases in resting cell assays of strain CBDB1 with brominated aromatics as electron acceptors. Activities of 2.8-13.2 nkat per mg total cell protein (0.16-0.8 units per mg total cell protein) were calculated after cultivation of strain CBDB1 on 1,2,4-tribromobenzene. Mass spectrometric analyses and activity assays with whole cell extracts of strain CBDB1 gave strong evidence that four to six reductive dehalogenases were involved in the dehalogenation of all tested brominated benzenes, including the reductive dehalogenases CbdbA80 and CbrA.
Collapse
Affiliation(s)
- Anke Wagner
- Applied Biochemistry, Technische Universität Berlin, Gustav-Meyer-Allee 25, 13355 Berlin, Germany
| | | | | | | | | |
Collapse
|
28
|
Quillet L, Besaury L, Popova M, Paissé S, Deloffre J, Ouddane B. Abundance, diversity and activity of sulfate-reducing prokaryotes in heavy metal-contaminated sediment from a salt marsh in the Medway Estuary (UK). MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2012; 14:363-381. [PMID: 22124626 DOI: 10.1007/s10126-011-9420-5] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2010] [Accepted: 11/17/2011] [Indexed: 05/31/2023]
Abstract
We investigated the diversity and activity of sulfate-reducing prokaryotes (SRP) in a 3.5-m sediment core taken from a heavy metal-contaminated site in the Medway Estuary, UK. The abundance of SRPs was quantified by qPCR of the dissimilatory sulfite reductase gene β-subunit (dsrB) and taking into account DNA extraction efficiency. This showed that SRPs were abundant throughout the core with maximum values in the top 50 cm of the sediment core making up 22.4% of the total bacterial community and were 13.6% at 250 cm deep. Gene libraries for dsrA (dissimilatory sulfite reductase α-subunit) were constructed from the heavily contaminated (heavy metals) surface sediment (top 20 cm) and from the less contaminated and sulfate-depleted, deeper zone (250 cm). Certain cloned sequences were similar to dsrA found in members of the Syntrophobacteraceae, Desulfobacteraceae and Desulfovibrionaceae as well as a large fraction (60%) of novel sequences that formed a deep branching dsrA lineage. Phylogenetic analysis of metabolically active SRPs was performed by reverse transcription PCR and single strand conformational polymorphism analysis (RT-PCR-SSCP) of dsrA genes derived from extracted sediment RNA. Subsequent comparative sequence analysis of excised SSCP bands revealed a high transcriptional activity of dsrA belonging to Desulfovibrio species in the surface sediment. These results may suggest that members of the Desulfovibrionaceae are more active than other SRP groups in heavy metal-contaminated surface sediments.
Collapse
Affiliation(s)
- Laurent Quillet
- Faculté des Sciences, Université de Rouen-CNRS 6143-M2C, Groupe de Microbiologie, Place Emile Blondel, Mont Saint Aignan Cedex 76821, France.
| | | | | | | | | | | |
Collapse
|
29
|
Ding C, He J. Molecular techniques in the biotechnological fight against halogenated compounds in anoxic environments. Microb Biotechnol 2012; 5:347-67. [PMID: 22070763 PMCID: PMC3821678 DOI: 10.1111/j.1751-7915.2011.00313.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Revised: 09/24/2011] [Accepted: 09/28/2011] [Indexed: 11/28/2022] Open
Abstract
Microbial treatment of environmental contamination by anthropogenic halogenated organic compounds has become popular in recent decades, especially in the subsurface environments. Molecular techniques such as polymerase chain reaction-based fingerprinting methods have been extensively used to closely monitor the presence and activities of dehalogenating microbes, which also lead to the discovery of new dehalogenating bacteria and novel functional genes. Nowadays, traditional molecular techniques are being further developed and optimized for higher sensitivity, specificity, and accuracy to better fit the contexts of dehalogenation. On the other hand, newly developed high throughput techniques, such as microarray and next-generation sequencing, provide unsurpassed detection ability, which has enabled large-scale comparative genomic and whole-genome transcriptomic analysis. The aim of this review is to summarize applications of various molecular tools in the field of microbially mediated dehalogenation of various halogenated organic compounds. It is expected that traditional molecular techniques and nucleic-acid-based biomarkers will still be favoured in the foreseeable future because of relative low costs and high flexibility. Collective analyses of metagenomic sequencing data are still in need of information from individual dehalogenating strains and functional reductive dehalogenase genes in order to draw reliable conclusions.
Collapse
Affiliation(s)
| | - Jianzhong He
- Department of Civil and Environmental Engineering, National University of Singapore, Singapore 117576
| |
Collapse
|
30
|
Zu L, Li G, An T, Wong PK. Biodegradation kinetics and mechanism of 2,4,6-tribromophenol by Bacillus sp. GZT: a phenomenon of xenobiotic methylation during debromination. BIORESOURCE TECHNOLOGY 2012; 110:153-159. [PMID: 22357290 DOI: 10.1016/j.biortech.2012.01.131] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Revised: 01/23/2012] [Accepted: 01/24/2012] [Indexed: 05/31/2023]
Abstract
A strain Bacillus sp. GZT capable of debrominating and mineralizing 2,4,6-tribromophenol (TBP) was isolated and characterized by morphological observation, biochemical and physiological identification as well as 16S rRNA sequence analysis. Biodegradation kinetics experiments demonstrated that initial TBP concentration had a predominant effect on degradation efficiency. Within 120h, the highest TBP degradation and debromination efficiencies were up to 93.2% and 89.3%, respectively, under the optimum condition. Ten metabolic intermediates including five brominated compounds, three oxidative products and two cellular metabolites were all identified by gas chromatography-mass spectrometer, and six key intermediates were doubly validated by authentic standards. The proposed biodegradation mechanism inferred that reductive debromination as a major degradation pathway could simultaneously take place at ortho- and para-positions on TBP, while methylated debromination was also found as a minor degradation pathway during this process. Within 148h degradation, nearly one-third of 3mg/L TBP could be completely mineralized.
Collapse
Affiliation(s)
- Lei Zu
- State Key Laboratory of Organic Geochemistry and Guangdong Key Laboratory of Environmental Resources Utilization and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; Graduate School of Chinese Academy of Sciences, Beijing 100049, China
| | | | | | | |
Collapse
|
31
|
Lee LK, Ding C, Yang KL, He J. Complete debromination of tetra- and penta-brominated diphenyl ethers by a coculture consisting of dehalococcoides and desulfovibrio species. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2011; 45:8475-8482. [PMID: 21859110 DOI: 10.1021/es201559g] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Polybrominated diphenyl ethers (PBDEs) are widespread global contaminants due to their extensive usage as flame retardants. Among the 209 PBDE congeners, tetra-brominated diphenyl ether (tetra-BDE) (congener 47) and penta-BDEs (congeners 99 and 100) are the most abundant, toxic, and bioaccumulative congeners in the environment. However, little is known about microorganisms that carry out debromination of these congeners under anaerobic conditions. In this study, we describe a coculture GY2 consisting of Dehalococcoides and Desulfovibrio spp., which is capable of debrominating ∼1180 nM of congeners 47, 99, and 100 (88-100% removal) to the nonbrominated diphenyl ether at an average rate of 36.9, 19.8, and 21.9 nM day(-1), respectively. Ortho bromines are preferentially removed during the debromination process. The growth of Dehalococcoides links tightly with PBDE debromination, with an estimated growth yield of 1.99 × 10(14) cells per mole of bromide released, while the growth of Desulfovibrio could be independent of PBDEs. The growth-coupled debromination suggests that Dehalococcoides cells in the coculture GY2 are able to respire on PBDEs. Given the ubiquity and recalcitrance of the tetra- and penta-BDEs, complete debromination of these congeners to less toxic end products (e.g. diphenyl ether) is important for the restoration of PBDE-contaminated environments.
Collapse
Affiliation(s)
- Lip Kim Lee
- Department of Civil and Environmental Engineering, ‡Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117576
| | | | | | | |
Collapse
|
32
|
Dzierzewicz Z, Szczerba J, Lodowska J, Wolny D, Gruchlik A, Orchel A, Weglarz L. The role of Desulfovibrio desulfuricans lipopolysaccharides in modulation of periodontal inflammation through stimulation of human gingival fibroblasts. Arch Oral Biol 2010; 55:515-22. [PMID: 20593542 DOI: 10.1016/j.archoralbio.2010.05.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
OBJECTIVE Periodontitis is a destructive disease which is likely to be the result of the activities of different microbial complexes. Recently, sulphate-reducing bacteria (SRB) have been detected in the oral cavity, and they have been found to be common inhabitants of sites showing periodontal destruction. The aim of study was to evaluate the influence of endotoxins of Desulfovibrio desulfuricans bacteria on human gingival fibroblast HGF-1 line. METHODS The immunological response of gingival fibroblasts was evaluated by determination of their IL-6 and IL-8 secretion upon treatment with D. desulfuricans intestinal and type strain LPS, sodium butyrate (NaB) and IL-1beta. The amounts of cytokines were estimated by ELISA immunoassay. The influence of LPS and NaB on fibroblast proliferation was determined using the CyQUANT Cell Proliferation Assay Kit. RESULTS No significant growth inhibition of cells exposed to LPS was observed, except for the culture growing in the presence of intestinal strain endotoxin at the highest concentration (100 microg/ml). The secretion of IL-6 and IL-8 by fibroblasts was increased by D. desulfuricans endotoxins. Cells stimulated with proinflammatory cytokine 1L-1beta showed very high levels of both cytokines secretion. The release of IL-6 and IL-8 by cells in response to LPS and 1L-1beta was modulated by butyric acid. CONCLUSIONS The observed response of gingival fibroblasts to stimulation by endotoxin suggests that D. desulfuricans can be involved in the pathogenesis of periodontitis. Moreover, butyrate present in the oral cavity seems to have immunoregulatory effect on cytokine production by gingival fibroblasts under physiological conditions and during microbe-induced inflammation.
Collapse
Affiliation(s)
- Zofia Dzierzewicz
- Department of Biopharmacy, Medical University of Silesia, Sosnowiec, Poland
| | | | | | | | | | | | | |
Collapse
|
33
|
Dong Y, Butler EC, Philp RP, Krumholz LR. Impacts of microbial community composition on isotope fractionation during reductive dechlorination of tetrachloroethylene. Biodegradation 2010; 22:431-44. [PMID: 20862525 DOI: 10.1007/s10532-010-9416-2] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2010] [Accepted: 09/07/2010] [Indexed: 11/24/2022]
Abstract
Isotope fractionation has been used with increasing frequency as a tool to quantify degradation of chlorinated aliphatic pollutants in the environment. The objective of this research was to determine if the electron donor present in enrichment cultures prepared from uncontaminated sediments influenced the extent of isotope fractionation of tetrachloroethylene (PCE), either directly, or through its influence on microbial community composition. Two PCE-degrading enrichment cultures were prepared from Duck Pond (DP) sediment and were incubated with formate (DPF) or H(2) (DPH) as electron donor. DPF and DPH were significantly different in both product distribution and extent of isotope fractionation. Chemical and isotope analyses indicated that electron donors did not directly affect the product distribution or the extent of isotope fractionation for PCE reductive dechlorination. Instead, restriction fragment length polymorphism (RFLP) and sequence analysis of the 16S rRNA clone libraries of DPF and DPH identified distinct microbial communities in each enrichment culture, suggesting that differences in microbial communities were responsible for distinct product distributions and isotope fractionation between the two cultures. A dominant species identified only in DPH was closely related to known dehalogenating species (Sulfurospirillum multivorans and Sulfurospirillum halorespirans) and may be responsible for PCE degradation in DPH. Our study suggests that different dechlorinators exist at the same site and can be preferentially stimulated by different electron donors, especially over the long-term (i.e., years), typical of in-situ ground water remediation.
Collapse
Affiliation(s)
- Yiran Dong
- Energy and Bioscience Institute, University of Illinois-Urbana Champaign, Urbana, IL 61801, USA
| | | | | | | |
Collapse
|
34
|
Xiao Y, Roberts DJ. A review of anaerobic treatment of saline wastewater. ENVIRONMENTAL TECHNOLOGY 2010; 31:1025-1043. [PMID: 20662390 DOI: 10.1080/09593331003734202] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Large volumes of saline (> 2% w/v NaCl) wastewaters are discharged from many industries; e.g. seafood processing, textile dyeing, oil and gas production, tanneries and drinking water treatment processes. Although anaerobic treatment would be the most cost-effective and sustainable technology for the treatment of many of these saline wastewaters, the salinity is considered to be inhibitory to anaerobic biological treatment processes. The recent applications of salt-tolerant cultures for the treatment of wastewaters from seafood processing and ion-exchange processes suggest that biological systems can be used to treat salty wastewaters. Additionally, organisms capable of anaerobic degradation of contaminants in saline solutions have been observed in marine sediments and have been characterized during the last two decades. This manuscript provides a review of the recent research on anaerobic treatment of saline wastewater and bacterial consortia capable of the anaerobic degradation of pollutants in saline solutions, documenting that the biological treatment of saline wastewaters is promising.
Collapse
Affiliation(s)
- Yeyuan Xiao
- School of Engineering, University of British Columbia Okanagan, 3333 University Way, Kelowna BC, Canada
| | | |
Collapse
|
35
|
Iasur-Kruh L, Ronen Z, Arbeli Z, Nejidat A. Characterization of an enrichment culture debrominating tetrabromobisphenol A and optimization of its activity under anaerobic conditions. J Appl Microbiol 2010; 109:707-715. [PMID: 20202021 DOI: 10.1111/j.1365-2672.2010.04699.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
AIM To study the effects of incubation conditions on the microbial community structure and activity of a TBBPA-debrominating enrichment culture composed of bacterial and archaeal species. METHODS AND RESULTS The effects of the methanogen inhibitor 2-bromoethanesulfonate (BES), of the antibiotic ampicillin, of substrate (tetrabromobisphenol A, TBBPA) omission and availability of different electron donors on microbial community structure and activity were examined under anaerobic conditions. Debromination of TBBPA was blocked in the presence of ampicillin, while long-term incubation with BES resulted in delayed debromination activity. The results suggest that the bacterial species responsible for the debromination of TBBPA, while archaeal species involved in electron donor metabolism. The enrichment culture lost its debromination activity after cultivation for 9 months without TBBPA, concomitantly with the disappearance of two DNA bands in a denaturing gradient gel electrophoresis (DGGE) analysis of 16S rRNA gene fragments corresponding to Pelobacter carbinolicus and Sphaerochaeta sp. TQ1 that were present in the original culture. When butyrate was used as an electron donor, TBBPA debromination activity was attenuated. When acetate was used as the electron donor, no debromination was observed and in addition, there was a decrease in the abundance of the mcrA gene. CONCLUSIONS The results indicate that to maintain a high rate of TBBPA debromination activity, it is essential to preserve the microbial community structure (bacterial and archaeal members) of this culture and supply an electron donor that produces high amounts of hydrogen when fermented. SIGNIFICANCE AND IMPACT OF THE STUDY The study provides important information for the management of cultures to be used in bioremediation of TBBPA contaminated sites.
Collapse
Affiliation(s)
- L Iasur-Kruh
- Department of Environmental Hydrology and Microbiology, The Zuckerberg Institute for Water Research, The Jacob Blaustein Institutes for Desert Research, Ben Gurion University of the Negev, Negev, Israel
| | - Z Ronen
- Department of Environmental Hydrology and Microbiology, The Zuckerberg Institute for Water Research, The Jacob Blaustein Institutes for Desert Research, Ben Gurion University of the Negev, Negev, Israel
| | - Z Arbeli
- Laboratorio Ambiental, Instituto de Biotecnología - Edificio Manuel Ancizar, Universidad Nacional de Colombia, Bogotá, Colombia
| | - A Nejidat
- Department of Environmental Hydrology and Microbiology, The Zuckerberg Institute for Water Research, The Jacob Blaustein Institutes for Desert Research, Ben Gurion University of the Negev, Negev, Israel
| |
Collapse
|
36
|
Ye L, Schilhabel A, Bartram S, Boland W, Diekert G. Reductive dehalogenation of brominated ethenes bySulfurospirillum multivoransandDesulfitobacterium hafniensePCE-S. Environ Microbiol 2010; 12:501-9. [DOI: 10.1111/j.1462-2920.2009.02093.x] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
37
|
Dehalogenation activities and distribution of reductive dehalogenase homologous genes in marine subsurface sediments. Appl Environ Microbiol 2009; 75:6905-9. [PMID: 19749069 DOI: 10.1128/aem.01124-09] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Halogenated organic compounds serve as terminal electron acceptors for anaerobic respiration in a diverse range of microorganisms. Here, we report on the widespread distribution and diversity of reductive dehalogenase homologous (rdhA) genes in marine subsurface sediments. A total of 32 putative rdhA phylotypes were detected in sediments from the southeast Pacific off Peru, the eastern equatorial Pacific, the Juan de Fuca Ridge flank off Oregon, and the northwest Pacific off Japan, collected at a maximum depth of 358 m below the seafloor. In addition, significant dehalogenation activity involving 2,4,6-tribromophenol and trichloroethene was observed in sediment slurry from the Nankai Trough Forearc Basin. These results suggest that dehalorespiration is an important energy-yielding pathway in the subseafloor microbial ecosystem.
Collapse
|
38
|
Ahn YB, Kerkhof LJ, Haggblom MM. Desulfoluna spongiiphila sp. nov., a dehalogenating bacterium in the Desulfobacteraceae from the marine sponge Aplysina aerophoba. Int J Syst Evol Microbiol 2009; 59:2133-9. [DOI: 10.1099/ijs.0.005884-0] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
|
39
|
Segev O, Kushmaro A, Brenner A. Environmental impact of flame retardants (persistence and biodegradability). INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2009; 6:478-91. [PMID: 19440395 PMCID: PMC2672362 DOI: 10.3390/ijerph6020478] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/22/2009] [Accepted: 02/03/2009] [Indexed: 11/16/2022]
Abstract
Flame-retardants (FR) are a group of anthropogenic environmental contaminants used at relatively high concentrations in many applications. Currently, the largest market group of FRs is the brominated flame retardants (BFRs). Many of the BFRs are considered toxic, persistent and bioaccumulative. Bioremediation of contaminated water, soil and sediments is a possible solution for the problem. However, the main problem with this approach is the lack of knowledge concerning appropriate microorganisms, biochemical pathways and operational conditions facilitating degradation of these chemicals at an acceptable rate. This paper reviews and discusses current knowledge and recent developments related to the environmental fate and impact of FRs in natural systems and in engineered treatment processes.
Collapse
Affiliation(s)
- Osnat Segev
- Unit of Environmental Engineering, Faculty of Engineering Sciences, Ben-Gurion University of the Negev, P.O.Box 653, Be’er-Sheva, 84105, Israel; E-Mails:
(O. S.);
(A. B.)
| | - Ariel Kushmaro
- Department of Biotechnology Engineering, Faculty of Engineering Sciences, Ben-Gurion University of the Negev, P.O.Box 653, Be’er-Sheva, 84105, Israel
- * Author to whom correspondence should be addressed;
; Tel.: 972-8-6479024; Fax: 972-8-6472983
| | - Asher Brenner
- Unit of Environmental Engineering, Faculty of Engineering Sciences, Ben-Gurion University of the Negev, P.O.Box 653, Be’er-Sheva, 84105, Israel; E-Mails:
(O. S.);
(A. B.)
| |
Collapse
|
40
|
Takii S, Hanada S, Hase Y, Tamaki H, Uyeno Y, Sekiguchi Y, Matsuura K. Desulfovibrio marinisediminis sp. nov., a novel sulfate-reducing bacterium isolated from coastal marine sediment via enrichment with Casamino acids. Int J Syst Evol Microbiol 2008; 58:2433-8. [PMID: 18842870 DOI: 10.1099/ijs.0.65750-0] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
To obtain amino acid-utilizing sulfate reducers, enrichment culture was carried out with a medium containing Casamino acids and sulfate and inoculated with coastal marine sediment from the eutrophic Tokyo Bay, Japan. A sulfate reducer, designated strain C/L2(T), was isolated from the sulfide-producing enrichment culture after further enrichment with lactate and sulfate by means of the agar shake dilution method. Cells of strain C/L2(T) were vibrio-shaped, Gram-negative, motile rods (0.7-1.0 mum wide and 1.0-3.5 mum long) with single polar flagella. The optimum temperature for its growth was 37 degrees C, the optimum pH was around 7.5 and the optimum NaCl concentration was 20-25 g l(-1). Hydrogen, formate, lactate, pyruvate, fumarate, malate, succinate, ethanol, propanol, glycerol, glycine, alanine, serine, aspartate, Casamino acids, peptone and yeast extract were used as electron donors. Sulfate, sulfite and thiosulfate each served as an electron acceptor, but elemental sulfur, nitrate, fumarate, acrylate and 2,4,6-tribromophenol did not. Disproportionation of thiosulfate was not observed. Desulfoviridin, c-type cytochromes and catalase were present. The major respiratory quinone was MK-6(H(2)). The G+C content of the genomic DNA was 46.2 mol%. Comparisons based on 16S rRNA gene sequences and on dissimilatory sulfite reductase gene sequences clearly showed that strain C/L2(T) belonged to the genus Desulfovibrio: its closest relatives were the uncharacterized Desulfovibrio sp. strain TBP-1 (16S rRNA gene sequence similarity of 99.4 %) and Desulfovibrio acrylicus DSM 10141(T) (16S rRNA gene sequence similarity of 98.7 %). The level of DNA-DNA hybridization with Desulfovibrio acrylicus DSM 10141(T) was 10.3 %. On the basis of the data from this study and the physiological and phylogenetic differences that exist between the isolate and Desulfovibrio acrylicus, strain C/L2(T) represents a novel species of the genus Desulfovibrio, for which the name Desulfovibrio marinisediminis sp. nov. is proposed. The type strain is C/L2(T) (=NBRC [corrected] 101113(T)=JCM 14577(T)=DSM 17456(T)).
Collapse
Affiliation(s)
- Susumu Takii
- Department of Biological Sciences, Graduate School of Science, Tokyo Metropolitan University, Minamiohsawa 1-1, Hachioji 192-0397, Japan.
| | | | | | | | | | | | | |
Collapse
|
41
|
Suzuki D, Ueki A, Amaishi A, Ueki K. Diversity of substrate utilization and growth characteristics of sulfate-reducing bacteria isolated from estuarine sediment in Japan. J GEN APPL MICROBIOL 2007; 53:119-32. [PMID: 17575452 DOI: 10.2323/jgam.53.119] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Two different isolation methods, the dilution colony-counting method (colony-isolation) and enrichment culture, were used to isolate sulfate-reducing bacteria (SRBs) from estuarine sediment in Japan. Lactate was used as an electron donor for colony-isolation, and lactate or propionate was used for enrichment culture. All isolates were classified into six different phylogenetic groups according to the 16S rRNA gene-based analysis. The closest relatives of the colony-isolates (12 strains) were species in the genera of Desulfobacterium, Desulfofrigus, Desulfovibrio and Desulfomicrobium. The closest known relative of the lactate-enrichment isolates was Desulfovibrio acrylicus and that of the propionate-enrichment isolates was Desulfobulbus mediterraneus. All isolates were incompletely-oxidizing SRBs. Overall patterns of utilization of electron donors and acceptors, as well as fermentative substrates, differed depending on the affiliation of the strain. Furthermore, even if several strains used the same substrate, the growth rates were often significantly different depending on the strain. It was strongly suggested that various species of SRBs could coexist in the sediment by competing for common substrates as well as taking priority in favorable or specific substrates for each species and the community of SRBs should be able to oxidize almost all major intermediates of anaerobic decomposition of organic matter such as lower fatty acids, alcohols and H2 as well as amino acids. Thus, it was indicated by the phylogenetic and physiological analyses of the isolates that the SRB community composed of diverse lineages of bacteria living in anoxic estuarine sediment should be able to play an extensive role in the carbon cycle as well as the sulfur cycle of the earth.
Collapse
Affiliation(s)
- Daisuke Suzuki
- Faculty of Agriculture, Yamagata University, Tsuruoka, Yamagata 997-8555, Japan
| | | | | | | |
Collapse
|
42
|
Haouari O, Fardeau ML, Casalot L, Tholozan JL, Hamdi M, Ollivier B. Isolation of sulfate-reducing bacteria from Tunisian marine sediments and description of Desulfovibrio bizertensis sp. nov. Int J Syst Evol Microbiol 2006; 56:2909-2913. [PMID: 17158997 DOI: 10.1099/ijs.0.64530-0] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Several strains of sulfate-reducing bacteria were isolated from marine sediments recovered near Tunis, Korbous and Bizerte, Tunisia. They all showed characteristics consistent with members of the genus Desulfovibrio. One of these strains, designated MB3T, was characterized further. Cells of strain MB3T were slender, curved, vibrio-shaped, motile, Gram-negative, non-spore-forming rods. They were positive for desulfoviridin as bisulfite reductase. Strain MB3T grew at temperatures of 15–45 °C (optimum 40 °C) and at pH 6.0–8.1 (optimum pH 7.0). NaCl was required for growth (optimum 20 g NaCl l−1). Strain MB3T utilized H2 in the presence of acetate with sulfate as electron acceptor. It also utilized lactate, ethanol, pyruvate, malate, fumarate, succinate, butanol and propanol as electron donors. Lactate was oxidized incompletely to acetate. Strain MB3T fermented pyruvate and fumarate (poorly). Electron acceptors utilized included sulfate, sulfite, thiosulfate, elemental sulfur and fumarate, but not nitrate or nitrite. The G+C content of the genomic DNA was 51 mol%. On the basis of genotypic, phenotypic and phylogenetic characteristics, strain MB3T (=DSM 18034T=NCIMB 14199T) is proposed as the type strain of a novel species, Desulfovibrio bizertensis sp. nov.
Collapse
Affiliation(s)
- Olfa Haouari
- UR-Procédés Microbiologiques et Alimentaires, INSAT, 1080 Tunis, Tunisia
- Laboratoire de microbiologie IRD, UMR 180, IFR-BAIM, Universités de Provence et de la Méditerranée, ESIL case 925, 163 Avenue de Luminy, F-13288 Marseille cedex 09, France
| | - Marie-Laure Fardeau
- Laboratoire de microbiologie IRD, UMR 180, IFR-BAIM, Universités de Provence et de la Méditerranée, ESIL case 925, 163 Avenue de Luminy, F-13288 Marseille cedex 09, France
| | - Laurence Casalot
- Laboratoire de microbiologie IRD, UMR 180, IFR-BAIM, Universités de Provence et de la Méditerranée, ESIL case 925, 163 Avenue de Luminy, F-13288 Marseille cedex 09, France
| | - Jean-Luc Tholozan
- Laboratoire de microbiologie IRD, UMR 180, IFR-BAIM, Universités de Provence et de la Méditerranée, ESIL case 925, 163 Avenue de Luminy, F-13288 Marseille cedex 09, France
| | - Moktar Hamdi
- UR-Procédés Microbiologiques et Alimentaires, INSAT, 1080 Tunis, Tunisia
| | - Bernard Ollivier
- Laboratoire de microbiologie IRD, UMR 180, IFR-BAIM, Universités de Provence et de la Méditerranée, ESIL case 925, 163 Avenue de Luminy, F-13288 Marseille cedex 09, France
| |
Collapse
|
43
|
Grostern A, Edwards EA. A 1,1,1-trichloroethane-degrading anaerobic mixed microbial culture enhances biotransformation of mixtures of chlorinated ethenes and ethanes. Appl Environ Microbiol 2006; 72:7849-56. [PMID: 17056695 PMCID: PMC1694251 DOI: 10.1128/aem.01269-06] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
1,1,1-trichloroethane (1,1,1-TCA) is a common groundwater pollutant as a result of improper disposal and accidental spills. It is often found as a cocontaminant with trichloroethene (TCE) and inhibits some TCE-degrading microorganisms. 1,1,1-TCA removal is therefore required for effective bioremediation of sites contaminated with mixed chlorinated organics. This study characterized MS, a 1,1,1-TCA-degrading, anaerobic, mixed microbial culture derived from a 1,1,1-TCA-contaminated site in the northeastern United States. MS reductively dechlorinated 1,1,1-TCA to 1,1-dichloroethane (1,1-DCA) and then to monochloroethane (CA) but not further. Cloning of bacterial 16S rRNA genes revealed among other organisms the presence of a Dehalobacter sp. and a Desulfovibrio sp., which are both phylogenetically related to known dehalorespiring strains. Monitoring of these populations with species-specific quantitative PCR during degradation of 1,1,1-TCA and 1,1-DCA showed that Dehalobacter proliferated during dechlorination. Dehalobacter growth was dechlorination dependent, whereas Desulfovibrio growth was dechlorination independent. Experiments were also performed to test whether MS could enhance TCE degradation in the presence of inhibiting levels of 1,1,1-TCA. Dechlorination of cis-dichloroethene (cDCE) and vinyl chloride (VC) in KB-1, a chloroethene-degrading culture used for bioaugmentation, was inhibited with 1,1,1-TCA present. When KB-1 and MS were coinoculated, degradation of cDCE and VC to ethene proceeded as soon as the 1,1,1-TCA was dechlorinated to 1,1-DCA by MS. This demonstrated the potential application of the MS and KB-1 cultures for cobioaugmentation of sites cocontaminated with 1,1,1-TCA and TCE.
Collapse
Affiliation(s)
- Ariel Grostern
- Department of cell and Systems Biology, University of Toronto, 200 College St., Toronto, ON M5S 3E5, Canada
| | | |
Collapse
|
44
|
Arbeli Z, Ronen Z, Díaz-Báez MC. Reductive dehalogenation of tetrabromobisphenol-A by sediment from a contaminated ephemeral streambed and an enrichment culture. CHEMOSPHERE 2006; 64:1472-8. [PMID: 16497360 DOI: 10.1016/j.chemosphere.2005.12.069] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2005] [Revised: 12/20/2005] [Accepted: 12/28/2005] [Indexed: 05/06/2023]
Abstract
This study was aimed at improving our understanding of the physiology of the microorganisms that reductively dehalogenate tetrabromobisphenol-A (TBBPA). Activity was followed in contaminated sediments from a polluted streambed as well as from fracture filling material underlying the stream. Reductive dehalogenation was observed in surface sediments but not in fracture filling samples from a depth of 3m. Likewise, anaerobic microbial activity, represented by sulphate reduction, was much higher in the surface sediment. In the culture enriched from the surface sediment, optimal microbial debromination of TBBPA took place at a salinity of 2% and 3% NaCl, temperature of 30 degrees Celsius, and pH of 7-8. Ethanol, pyruvate and the combination of hydrogen with acetate were the most suitable electron donors and carbon sources for this culture. Alternative electron acceptors like Fe(3+), SO(4)(2-), SO(3)(2-), NO(3)(-) and 2,4,6-tribromophenol inhibited TBBPA debromination. The debrominating bacteria were heat sensitive (80 degrees Celsius, for 10min) but were not inhibited by bromoethanesulphonate or molybdate. This study allowed optimisation of our culturing conditions, but was also important for understanding the factors which influence TBBPA debromination in situ.
Collapse
Affiliation(s)
- Ziv Arbeli
- Laboratorio Ambiental, Instituto de Biotecnología, Edificio Manuel Ancizar, Universidad Nacional de Colombia, Bogotá, DC, Colombia.
| | | | | |
Collapse
|
45
|
Vetter W. Marine halogenated natural products of environmental relevance. REVIEWS OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2006; 188:1-57. [PMID: 17016915 DOI: 10.1007/978-0-387-32964-2_1] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
A wide range and steadily increasing number of halogenated natural products (HNPs) is detected in marine organisms that are not the natural source of these compounds but which have accumulated these HNPs in a similar way as known to occur with anthropogenic halogenated pollutants such as PCBs and DDT. The HNPs have aromatic, aliphatic, and heterocyclic spines and are brominated, chlorinated, or mixed halogenated (Cl and Br). The exact isomer structures of HNPs are often closely related to the anthropogenic POPs, and for some compounds both natural and anthropogenic sources are likely to exist. Some of the HNPs are nonpolar, persistent, and can thus be found even in marine mammals and birds of prey. The most important HNPs detected in top predators are halogenated 1,1'-dimethyl-2,2'-bipyrroles (HDBPs), the heptachloro-1'-methyl-1,2'-bipyrrole Q1, the tetrabromophenoxyanisole isomers 6-MeO-BDE 47 and 2'-MeO-BDE 68, and related compounds. Each of these compounds has been detected in higher trophic biota with concentrations exceeding 1 mg/kg.
Collapse
Affiliation(s)
- Walter Vetter
- University of Hohenheim, Institute of Food Chemistry (170b), Garbenstr. 28, D-70599 Stuttgart, Germany
| |
Collapse
|
46
|
Arnon S, Ronen Z, Adar E, Yakirevich A, Nativ R. Two-dimensional distribution of microbial activity and flow patterns within naturally fractured chalk. JOURNAL OF CONTAMINANT HYDROLOGY 2005; 79:165-86. [PMID: 16099071 DOI: 10.1016/j.jconhyd.2005.06.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2004] [Revised: 06/16/2005] [Accepted: 06/17/2005] [Indexed: 05/04/2023]
Abstract
The two-dimensional distribution of flow patterns and their dynamic change due to microbial activity were investigated in naturally fractured chalk cores. Long-term biodegradation experiments were conducted in two cores ( approximately 20 cm diameter, 31 and 44 cm long), intersected by a natural fracture. 2,4,6-tribromophenol (TBP) was used as a model contaminant and as the sole carbon source for aerobic microbial activity. The transmissivity of the fractures was continuously reduced due to biomass accumulation in the fracture concurrent with TBP biodegradation. From multi-tracer experiments conducted prior to and following the microbial activity, it was found that biomass accumulation causes redistribution of the preferential flow channels. Zones of slow flow near the fracture inlet were clogged, thus further diverting the flow through zones of fast flow, which were also partially clogged. Quantitative evaluation of biodegradation and bacterial counts supported the results of the multi-tracer tests, indicating that most of the bacterial activity occurs close to the inlet. The changing flow patterns, which control the nutrient supply, resulted in variations in the concentrations of the chemical constituents (TBP, bromide and oxygen), used as indicators of biodegradation.
Collapse
Affiliation(s)
- Shai Arnon
- Department of Environmental Hydrology and Microbiology, Zuckerberg Institute for Water Research, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede-Boqer Campus 84990, Israel.
| | | | | | | | | |
Collapse
|
47
|
Cupples AM, Sanford RA, Sims GK. Dehalogenation of the herbicides bromoxynil (3,5-dibromo-4-hydroxybenzonitrile) and ioxynil (3,5-diiodino-4-hydroxybenzonitrile) by Desulfitobacterium chlororespirans. Appl Environ Microbiol 2005; 71:3741-6. [PMID: 16000784 PMCID: PMC1169022 DOI: 10.1128/aem.71.7.3741-3746.2005] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2004] [Accepted: 02/10/2005] [Indexed: 11/20/2022] Open
Abstract
Desulfitobacterium chlororespirans has been shown to grow by coupling the oxidation of lactate to the metabolic reductive dehalogenation of ortho chlorines on polysubstituted phenols. Here, we examine the ability of D. chlororespirans to debrominate and deiodinate the polysubstituted herbicides bromoxynil (3,5-dibromo-4-hydroxybenzonitrile), ioxynil (3,5-diiodo-4-hydroxybenzonitrile), and the bromoxynil metabolite 3,5-dibromo-4-hydroxybenzoate (DBHB). Stoichiometric debromination of bromoxynil to 4-cyanophenol and DBHB to 4-hydroxybenzoate occurred. Further, bromoxynil (35 to 75 microM) and DBHB (250 to 260 microM) were used as electron acceptors for growth. Doubling times for growth (means +/- standard deviations for triplicate cultures) on bromoxynil (18.4 +/- 5.2 h) and DBHB (11.9 +/- 1.4 h), determined by rate of [14C]lactate uptake into biomass, were similar to those previously reported for this microorganism during growth on pyruvate (15.4 h). In contrast, ioxynil was not deiodinated when added alone or when added with bromoxynil; however, ioxynil dehalogenation, with stoichiometric conversion to 4-cyanophenol, was observed when the culture was amended with 3-chloro-4-hydroxybenzoate (a previously reported electron acceptor). To our knowledge, this is the first direct report of deiodination by a bacterium in the Desulfitobacterium genus and the first report of an anaerobic pure culture with the ability to transform bromoxynil or ioxynil. This research provides valuable insights into the substrate range of D. chlororespirans.
Collapse
Affiliation(s)
- Alison M Cupples
- United States Department of Agriculture-Agricultural Research Service, S-306 Turner Hall, 1102 S. Goodwin Ave., Urbana, IL 61801, USA.
| | | | | |
Collapse
|
48
|
Arnon S, Adar E, Ronen Z, Yakirevich A, Nativ R. Impact of microbial activity on the hydraulic properties of fractured chalk. JOURNAL OF CONTAMINANT HYDROLOGY 2005; 76:315-336. [PMID: 15683886 DOI: 10.1016/j.jconhyd.2004.11.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2004] [Revised: 11/15/2004] [Accepted: 11/26/2004] [Indexed: 05/24/2023]
Abstract
The impact of microbial activity on fractured chalk transmissivity was investigated on a laboratory scale. Long-term experiments were conducted on six fractured chalk cores (20 cm diameter, 23-44 cm long) containing a single natural fracture embedded in a porous matrix. Biodegradation experiments were conducted under various conditions, including several substrate and oxygen concentrations and flow rates. 2,4,6-Tribromophenol (TBP) was used as a model contaminant (substrate). TBP biodegradation efficiency depended mainly on the amount of oxygen. However, under constant oxygen concentration at the core inlet, elevating the flow rates increased the removal rate of TBP. Transmissivity reduction was clearly related to TBP removal rate, following an initial slow decline and a further sharp decrease with time. The fracture's transmissivity was reduced by as much as 97% relative to the initial value, with no leveling off of the clogging process. For the most extreme cases, reductions of 262 and 157 microm in the equivalent hydraulic apertures were recorded for fractures with initial apertures of 495 and 207 microm, respectively. The reductions in fracture transmissivity occurred primarily because of clogging by bacterial cells and extracellular polymeric substances (EPS) produced by the bacteria. Most of the biodegradation activity was concentrated near the fracture inlet, where the most suitable biodegradation conditions (nutrients and oxygen) prevailed, suggesting that the clogging had occurred in that vicinity. The clogging must have changed the structure of the fracture void, thereby reducing the active volume participating in flow and transport processes. This phenomenon caused accelerated transport of non-reactive tracers and doubled the fracture's dispersivity under constant flow rates.
Collapse
Affiliation(s)
- Shai Arnon
- Department of Environmental Hydrology & Microbiology, Zuckerberg Institute for Water Research, J. Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede-Boqer 84990, Israel.
| | | | | | | | | |
Collapse
|
49
|
Fennell DE, Rhee SK, Ahn YB, Häggblom MM, Kerkhof LJ. Detection and characterization of a dehalogenating microorganism by terminal restriction fragment length polymorphism fingerprinting of 16S rRNA in a sulfidogenic, 2-bromophenol-utilizing enrichment. Appl Environ Microbiol 2004; 70:1169-75. [PMID: 14766602 PMCID: PMC348854 DOI: 10.1128/aem.70.2.1169-1175.2004] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Terminal restriction fragment length polymorphism analysis of reverse-transcribed 16S rRNA during periods of community flux was used as a tool to delineate the roles of the members of a 2-bromophenol-degrading, sulfate-reducing consortium. Starved, washed cultures were amended with 2-bromophenol plus sulfate, 2-bromophenol plus hydrogen, phenol plus sulfate, or phenol with no electron acceptor and were monitored for substrate use. In the presence of sulfate, 2-bromophenol and phenol were completely degraded. In the absence of sulfate, 2-bromophenol was dehalogenated and phenol accumulated. Direct terminal restriction fragment length polymorphism fingerprinting of the 16S rRNA in the various subcultures indicated that phylotype 2BP-48 (a Desulfovibrio-like sequence) was responsible for the dehalogenation of 2-bromophenol. A stable coculture was established which contained predominantly 2BP-48 and a second Desulfovibrio-like bacterium (designated BP212 based on terminal restriction fragment length polymorphism fingerprinting) that was capable of dehalogenating 2-bromophenol to phenol. Strain 2BP-48 in the coculture could couple reductive dehalogenation to growth with 2-bromophenol, 2,6-dibromophenol, or 2-iodophenol and lactate or formate as the electron donor. In addition to halophenols, strain 2BP-48 appears to use sulfate, sulfite, and thiosulfate as electron acceptors and is capable of simultaneous sulfidogenesis and reductive dehalogenation in the presence of sulfate.
Collapse
Affiliation(s)
- Donna E Fennell
- Department of Biochemistry and Microbiology and Biotechnology Center for Agriculture and the Environment, Rutgers, The State University of New Jersey, New Brunswick, New Jersey 08901, USA
| | | | | | | | | |
Collapse
|
50
|
Ahn YB, Rhee SK, Fennell DE, Kerkhof LJ, Hentschel U, Häggblom MM. Reductive dehalogenation of brominated phenolic compounds by microorganisms associated with the marine sponge Aplysina aerophoba. Appl Environ Microbiol 2003; 69:4159-66. [PMID: 12839794 PMCID: PMC165205 DOI: 10.1128/aem.69.7.4159-4166.2003] [Citation(s) in RCA: 100] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Marine sponges are natural sources of brominated organic compounds, including bromoindoles, bromophenols, and bromopyrroles, that may comprise up to 12% of the sponge dry weight. Aplysina aerophoba sponges harbor large numbers of bacteria that can amount to 40% of the biomass of the animal. We postulated that there might be mechanisms for microbially mediated degradation of these halogenated chemicals within the sponges. The capability of anaerobic microorganisms associated with the marine sponge to transform haloaromatic compounds was tested under different electron-accepting conditions (i.e., denitrifying, sulfidogenic, and methanogenic). We observed dehalogenation activity of sponge-associated microorganisms with various haloaromatics. 2-Bromo-, 3-bromo-, 4-bromo-, 2,6-dibromo-, and 2,4,6-tribromophenol, and 3,5-dibromo-4-hydroxybenzoate were reductively debrominated under methanogenic and sulfidogenic conditions with no activity observed in the presence of nitrate. Monochlorinated phenols were not transformed over a period of 1 year. Debromination of 2,4,6-tribromophenol, and 2,6-dibromophenol to 2-bromophenol was more rapid than the debromination of the monobrominated phenols. Ampicillin and chloramphenicol inhibited activity, suggesting that dehalogenation was mediated by bacteria. Characterization of the debrominating methanogenic consortia by using terminal restriction fragment length polymorphism (TRFLP) and denaturing gradient gel electrophoresis analysis indicated that different 16S ribosomal DNA (rDNA) phylotypes were enriched on the different halogenated substrates. Sponge-associated microorganisms enriched on organobromine compounds had distinct 16S rDNA TRFLP patterns and were most closely related to the delta subgroup of the proteobacteria. The presence of homologous reductive dehalogenase gene motifs in the sponge-associated microorganisms suggested that reductive dehalogenation might be coupled to dehalorespiration.
Collapse
Affiliation(s)
- Young-Beom Ahn
- Department of Biochemistry and Microbiology, Biotechnology Center for Agriculture and the Environment, Rutgers, The State University of New Jersey, 76 Lipman Drive, New Brunswick, NJ 08901-8525, USA
| | | | | | | | | | | |
Collapse
|