Screening studies with strict and facultative anaerobic bacteria showed that Clostridium app. and several other representatives of Bacillaceae and Enterobacteriaceae actively degraded γ-hexachlorocyclohexane (γ-HCH) under anaerobic conditions. Representatives of Lactobacillaceae and Propronibacterium were inactive. With 36Cl-labelled γ-HCH a nearly complete dechlorination was shown to occur in 4-6 days by Clostridium butyricum, C. pasteurianum and Citrobacter freundii, while other facultative anaerobic species were less active. Aerobically grown facultative anaerobes also dechlorinated actively γ-HCH during subsequent anaerobic incubation with glucose, pyruvate or formate as substrates. The α-, β- and δ-HCH isomers were also, but more slowly, dechlorinated (γ>α>β≥δ-HCH). All species active in anaerobic degradation of γ-HCH formed γ-tetrachlorocyclohexene (TCH) as the main intermediate metabolite and no γ-pentachlorocyclohexene (PCH) or other isomers of TCH or PCH have been found. Small amounts of tri- and tetrachlorinated benzenes have been found too. The mechanism of dechlorination is discussed. © 1977 Springer-Verlag.
CITATION STYLE
Jagnow, G., Haider, K., & Ellwardt, P. C. (1977). Anaerobic dechlorination and degradation of hexachlorocyclohexane isomers by anaerobic and facultative anaerobic bacteria. Archives of Microbiology, 115(3), 285–292. https://doi.org/10.1007/BF00446454
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