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Involvement of Dehalobacter strains in the anaerobic dechlorination of 2,4,6-trichlorophenol

Paper ID Volume ID Publish Year Pages File Format Full-Text
20560 43180 2013 8 PDF Available
Title
Involvement of Dehalobacter strains in the anaerobic dechlorination of 2,4,6-trichlorophenol
Abstract

A culture reductively dechlorinating 2,4,6-trichlorophenol (TCP) was enriched from a sediment contaminated with chlorinated aliphatic hydrocarbons. The culture dechlorinated 100 μM of 2,4,6-TCP to 4-chlorophenol within 15 days utilizing H2 and a yeast extract as an electron donor and carbon source, respectively. Besides 2,4,6-TCP, the culture could also dehalogenate chlorophenols at ortho position and 2,4,6-tribromophenol at ortho and para positions, as well as chlorinated ethenes and ethanes. A 16S rRNA gene clone library analysis showed that the bacterial community was composed of members of the classes Clostridia, Bacteroidia, Spirochetes, and Epsilonproteobacteria. The phylogenetic and physiological characterization of the culture confirmed two novel Dehalobacter strains, TCP-5 and TCP-6, that were involved in the reductive dehalogenation of 2,4,6-TCP and other halogenated compounds. The study was significant as the first report to demonstrate the involvement of Dehalobacter in the reductive dehalogenation of both halogenated aromatic and aliphatic compounds.

Keywords
2,4,6-Trichlorophenol; Halogenated phenols; Chlorinated aliphatic compounds; Wide dehalogenation activity; Organohalide- respiration; Dehalobacter strains
First Page Preview
Involvement of Dehalobacter strains in the anaerobic dechlorination of 2,4,6-trichlorophenol
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Bioscience and Bioengineering - Volume 116, Issue 5, November 2013, Pages 602–609
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering