Effects of Sulfate Concentration on the Anaerobic Dechlorination of Polychlorinated Biphenyls in Estuarine Sediments

다국어 초록 (Multilingual Abstract)

In order to determine the effects of sulfate concentration on the anaerobic dechlorination of polychlorinated
biphenyls, sediments spiked with Aroclor 1242 were made into slurries using media which had various sulfate concentrations ranging from 3 to 23 mM.
The time course of dechlorination clearly
demonstrated that dechlorination was inhibited at high concentration of sulfate due to less dechlorination of meta-substituted congeners.
When the dechlorination patterns were analyzed by the calculation of Euclidean distance, the dechlorination pathway in the 3 mM sulfate samples was found to be
different from that observed in the 13 mM samples, although the extent of dechlorination in these two samples was similar. It is possible that the dechlorination in the high sulfate concentration samples is
inhibited by the suppression of growth of methanogen, which have been shown to be meta-dechlorinating microorganisms

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