Phylogenetic characterization of a polychlorinated-dioxin- dechlorinating microbial community by use of microcosm studies.

ABSTRACT: Microcosms capable of reductive dechlorination of polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs) were constructed in glass bottles by seeding them with a polluted river sediment and incubating them anaerobically with an organic medium. All of the PCDD/F congeners detected were equally reduced without the accumulation of significant amounts of less-chlorinated congeners as the intermediate or end products. Alternatively, large amounts of catechol and salicylic acid were produced in the upper aqueous phase. Thus, the dechlorination of PCDD/Fs and the oxidative degradation of the dechlorinated products seemed to take place simultaneously in the microcosm. Denaturing gel gradient electrophoresis and clone library analyses of PCR-amplified 16S rRNA genes from the microcosm showed tha

SUBMITTER: Yoshida N 

PROVIDER: S-EPMC1183323 | biostudies-literature | 2005 Aug

REPOSITORIES: biostudies-literature