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Specificity of Microbial Activities in the Reductive Dechlorination of Chlorinated Benzenes

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Abstract:

Anaerobic mixed cultures collected from tropical sediment were found to possess the ability to dechlorinate pentachlorobenzene (QCB) and hexachlorobenzene (HCB) after a long-term acclimation in HCB. The primary product for HCB and QCB was 1,3,5-trichlorobenzene (1,3,5-TCB). During QCB dechlorination, 1,2,3,5-tetrachlorobenzene (1,2,3,5-TeCB) is accumulated as the intermediate, but during the HCB dechlorination, QCB and 1,2,3,5-TeCB are not found. When treated with chloramphenicol, the microorganisms precultured in HCB were found to dechlorinate HCB for only 1 day and dechlorinate QCB for several days. However, microorganisms precultured in QCB could not dechlorinate HCB at all. Results also indicate that HCB is not directly dechlorinated to 1,3,5-TCB by a single microbial activity but that various microbial systems are responsible for each step of dechlorination from HCB to 1,3,5-TCB.

Keywords: CHLORAMPHENICOL; CHLOROBENZENES; MICROBIAL ACTIVITY; REDUCTIVE DECHLORINATION

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/106143000X138283

Publication date: November 1, 2000

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  • Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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