alexa Anaerobic degradation of hexachlorocyclohexane isomers in liquid and soil slurry systems.
Environmental Sciences

Environmental Sciences

Journal of Bioremediation & Biodegradation

Author(s): Quintero JC, Moreira MT, Feijoo G, Lema JM

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Abstract Gamma-hexachlorocyclohexane (gamma-HCH or lindane), one of the most commonly used insecticides, has been mainly used in agriculture. Organochloride compounds are known to be highly toxic and persistent, causing serious water and soil pollution. The objective of the present study is the evaluation of the anaerobic degradation of alpha-, beta-, gamma-, delta-HCH in liquid and slurry cultures. The slurry system with anaerobic sludge appears as an effective alternative in the detoxification of polluted soils with HCH, as total degradation of the four isomers was attained. While alpha- and gamma-HCH disappeared after 20-40d, the most recalcitrant isomers: beta- and delta-HCH were only degraded after 102d. Intermediate metabolites of HCH degradation as pentachlorocyclohexane (PCCH), tetrachlorocyclohexene (TCCH), tri-, di- and mono-chlorobenzenes were observed during degradation time. This article was published in Chemosphere and referenced in Journal of Bioremediation & Biodegradation

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