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Specificity of Microbial Activities in the Reductive Dechlorination of Chlorinated Benzenes
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.
Specificity of Microbial Activities in the Reductive Dechlorination of Chlorinated Benzenes
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.
Specificity of Microbial Activities in the Reductive Dechlorination of Chlorinated Benzenes
Chen, I‐Ming (author) / Chang, Fang‐Cheng (author) / Chang, Bea‐Ven (author) / Wang, Yei‐Shung (author)
Water Environment Research ; 72 ; 675-679
2000-11-01
5 pages
Article (Journal)
Electronic Resource
English
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