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Dechlorination of Fenclor 54 and of a synthetic mixture of polychlorinated biphenyls by anaerobic microorganisms by Fabio Fava; Sergio Cinti; Leonardo Marchetti is a Biochemistry, Genetics and Molecular Biology article available to read on EtoBox.

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Microorganisms obtained from a contaminated experimental soil were found to reductively dechlorinate the polychlorobiphenyls (PCBs) of ex-commercial Fenclor 54 and of a synthetic mixture of single congeners, under laboratory anaerobic conditions. The dechlorination rate and extent tended to increase as the chlorination degree of F 54 congeners increased. Several penta:clorinated congeners temporarily accumulated during the final period of incubation. Dechlorination occurred primarily from the rneta and para positions while ortho-sustituted congeners accumulated in the medium during incubation. The dechlorination pattern observed with these unacclimated microorganisms in both PCB mixtures could be only partially compared to patterns reported in the literature. The low product yield deriving from reductive dechlorination of PCBs, i.e. diand tri-chlorinated biphenyls, :and the slow rate of PCB biotransformation can be attributed to a lower dehalogenation capability of artificially contaminated soil microorganisms and, perhaps, also to the inadequacy of the adopted anaerobic medium.

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Author

Fabio Fava; Sergio Cinti; Leonardo Marchetti

Publisher

Springer; Springer-Verlag; Springer Verlag; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc. (ISSN 1432-0614)

Published

1993

Language

EN

Field

Biochemistry, Genetics and Molecular Biology (Life Sciences)