Anaerobic formation of alpha-hexachlorocyclohexane from gamma-hexachlorocyclohexane in soil and by Escherichia coli
article
In two soil types small amounts of ??-hexachlorocyclohexane were formed from ??-hexachlorocyclohexane under submerged conditions, but not under aerobic conditions. In the submerged soils ??-tetrachlorocyclohexene was detected as a major metabolite of ??-hexachlorocyclohexane, whereas aerobic soil incubation yielded ??-pentachlorocyclohexene. Growing cultures of Escherichia coli produced ??-hexachlorocyclohexane from the ??-isomer only upon anerobic incubation. Moreover, heavy, washed suspensions of E. coli incubated anaerobically with ??-hexachlorocyclohexane (7.5 mg/liter) in a glucose-phosphate buffer medium converted 1.6% of the ??-hexachlorocyclohexane into the ??-isomer in 10 days. Growing mycelia of Aspergillus niger incubated with ??-hexachlorocyclohexane produced no ??-isomer. Chemicals/CAS: lindane, 58-89-9
Topics
TNO Identifier
228703
ISSN
00483575
Source
Pesticide Biochemistry and Physiology, 12(1), pp. 68-74.
Pages
68-74
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