title: Specific removal of chlorine from the ortho-position of halogenated benzoic acids by reductive dechlorination in anaerobic enrichment cultures.
abstract: Anaerobic enrichment cultures catalysing the reductive dechlorination of chlorinated benzoic acids were obtained from three fresh-water sediments collected from seven different locations. Sub-cultures from these enrichments specifically removed ortho-substituted chlorine from 2,3,6-, 2,3,5- and 2,4,6-trichlorobenzoic acid, yielding chloride and 2,5-, 3,5-, and 2,4-dichlorobenzoic acids, respectively. These reductive dehalogenations were stimulated by the addition of benzoate and/or volatile organic acids. In one of these enrichments dehalogenation of ortho- and/or para-chlorine substituents was also observed from 2,3-, 2,4-, 2,5-, and 3,4-dichlorobenzoic acid, yielding 3- and 4-chlorobenzoate. Removal of meta-chlorines was not observed in any of the enrichments.
authors: Department of Microbiology, University of Groningen, Haren, Netherlands.
authors: J
authors: J
authors: Gerritse
authors: B J
authors: BJ
authors: van der Woude
authors: J C
authors: JC
authors: Gottschal
mesh_terms: D001421:Bacteria, Anaerobic / Q000302:isolation & purification / Q000378:metabolism*; D001673:Biodegradation, Environmental; D002723:Chlorobenzoates / Q000737:chemistry / Q000378:metabolism*; D007700:Kinetics; D015394:Molecular Structure; D010084:Oxidation-Reduction; D014871:Water Microbiology
chemical_list: D002723:Chlorobenzoates