| Microbial transformation and degradation of polychlorinated biphenyls. | |
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MedLine Citation:
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PMID: 18035460 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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This paper reviews the potential of microorganisms to transform polychlorinated biphenyls (PCBs). In anaerobic environments, higher chlorinated biphenyls can undergo reductive dehalogenation. Meta- and para-chlorines in PCB congeners are more susceptible to dechlorination than ortho-chlorines. Anaerobes catalyzing PCB dechlorination have not been isolated in pure culture but there is strong evidence from enrichment cultures that some Dehalococcoides spp. and other microorganisms within the Chloroflexi phylum can grow by linking the oxidation of H(2) to the reductive dechlorination of PCBs. Lower chlorinated biphenyls can be co-metabolized aerobically. Some aerobes can also grow by utilizing PCB congeners containing only one or two chlorines as sole carbon/energy source. An example is the growth of Burkholderia cepacia by transformation of 4-chlorobiphenyl to chlorobenzoates. The latter compounds are susceptible to aerobic mineralization. Higher chlorinated biphenyls therefore are potentially fully biodegradable in a sequence of reductive dechlorination followed by aerobic mineralization of the lower chlorinated products. |
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Authors:
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Jim A Field; Reyes Sierra-Alvarez |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't; Review Date: 2007-11-26 |
Journal Detail:
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Title: Environmental pollution (Barking, Essex : 1987) Volume: 155 ISSN: 0269-7491 ISO Abbreviation: Environ. Pollut. Publication Date: 2008 Sep |
Date Detail:
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Created Date: 2008-07-08 Completed Date: 2008-09-30 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8804476 Medline TA: Environ Pollut Country: England |
Other Details:
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Languages: eng Pagination: 1-12 Citation Subset: IM |
Affiliation:
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Department of Chemical and Environmental Engineering, University of Arizona, PO Box 210011, Tucson, AZ 85721, USA. jimfield@email.arizona.edu |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Aerobiosis Anaerobiosis Biodegradation, Environmental Ecology / methods Environmental Pollutants* Polychlorinated Biphenyls* Soil Microbiology* |
| Chemical | |
Reg. No./Substance:
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0/Environmental Pollutants; 0/Polychlorinated Biphenyls |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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