title: Reductive dechlorination of a polychlorinated biphenyl congener and hexachlorobenzene by vitamin B12.
abstract: The polychlorinated biphenyl congener 2,3,4,5,6-pentachlorobiphenyl and hexachlorobenzene were reductively dechlorinated in an aqueous biomimetic model system containing vitamin B12. The products of 2,3,4,5,6-pentachlorobiphenyl dechlorination were 2,3,5,6- and 2,3,4,6-tetrachlorobiphenyl. Hexachlorobenzene dechlorinated to pentachlorobenzene and a mixture of 1,2,4,5- and 1,2,3,5-tetrachlorobenzene. The proton from water was shown to be the source of the hydrogen atom used for the replacement of chlorine on the biphenyl ring.
authors.affiliation: Department of Civil and Environmental Engineering, University of Michigan, Ann Arbor 48109-2125.
authors.forename: N
authors.initials: N
authors.lastname: Assaf-Anid
authors.forename: L
authors.initials: L
authors.lastname: Nies
authors.forename: T M
authors.initials: TM
authors.lastname: Vogel
mesh_terms: D001673:Biodegradation, Environmental; D002713:Chlorine / Q000378:metabolism; D006581:Hexachlorobenzene / Q000378:metabolism*; D007700:Kinetics; D013058:Mass Spectrometry; D010084:Oxidation-Reduction; D011078:Polychlorinated Biphenyls / Q000378:metabolism*; D014805:Vitamin B 12 / Q000378:metabolism*
chemical_list: D002713:Chlorine; D006581:Hexachlorobenzene; D011078:Polychlorinated Biphenyls; D014805:Vitamin B 12