Biotransformation of -, -, 
bs.
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- 作者：Peter J. M. Middeldorp ; Marco Jaspers ; Alexander J. B. Zehnder ; and Gosse Schraa
- 刊名：Environmental Science & Technology
- 出版年：1996
- 出版时间：July 1996
- 年：1996
- 卷：30
- 期：7
- 页码：2345 - 2349
- 全文大小：457K
- 年卷期：v.30,no.7(July 1996)
- ISSN：1520-5851
文摘
During the production of the pesticide lindane (
BORDER=0 >-hexachlorocyclohexane; -HCH), large quantities ofbyproducts, like the 
-, 
beta2.gif" BORDER=0 ALIGN="middle">-, and 
-HCH isomers,were discarded at dump sites. beta2.gif" BORDER=0 ALIGN="middle">-HCH was found tobe extremely persistent in the environment underaerobic conditions. We studied the degradation ofthisisomer under methanogenic conditions in a flow-through column packed with polluted sediment. beta2.gif" BORDER=0 ALIGN="middle">-HCHwas completely removed in this system. Chlorobenzene was detected in the effluent as a product. Abeta2.gif" BORDER=0 ALIGN="middle">-HCH transforming anaerobic enrichment culture wasobtained in batch cultures by using the columnmaterial as inoculum.-2,3,4,5-Tetrachlorocyclohexeneis proposed as an intermediate during transformation,while benzene and chlorobenzene were formed asstable end products. The enrichment culture was alsoable to dechlorinate -HCH at a comparable rateand - and -HCH at lower rates. Dechlorinationwasinhibited by the addition of vancomycin, but not bythe addition of bromoethanesulfonic acid.Pasteurizationinhibited dechlorination completely. This is thefirstdetailed description of the biodegradation of beta2.gif" BORDER=0 ALIGN="middle">-HCH,including intermediate and end product identification,under defined anaerobic conditions.
BORDER=0 >-hexachlorocyclohexane; -HCH), large quantities ofbyproducts, like the -, beta2.gif" BORDER=0 ALIGN="middle">-, and -HCH isomers,were discarded at dump sites. beta2.gif" BORDER=0 ALIGN="middle">-HCH was found tobe extremely persistent in the environment underaerobic conditions. We studied the degradation ofthisisomer under methanogenic conditions in a flow-through column packed with polluted sediment. beta2.gif" BORDER=0 ALIGN="middle">-HCHwas completely removed in this system. Chlorobenzene was detected in the effluent as a product. Abeta2.gif" BORDER=0 ALIGN="middle">-HCH transforming anaerobic enrichment culture wasobtained in batch cultures by using the columnmaterial as inoculum.-2,3,4,5-Tetrachlorocyclohexeneis proposed as an intermediate during transformation,while benzene and chlorobenzene were formed asstable end products. The enrichment culture was alsoable to dechlorinate -HCH at a comparable rateand - and -HCH at lower rates. Dechlorinationwasinhibited by the addition of vancomycin, but not bythe addition of bromoethanesulfonic acid.Pasteurizationinhibited dechlorination completely. This is thefirstdetailed description of the biodegradation of beta2.gif" BORDER=0 ALIGN="middle">-HCH,including intermediate and end product identification,under defined anaerobic conditions.