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Characterization of the polychlorinated biphenyls in the sediments of Woods Pond: evidence for microbial dechlorination of Aroclor 1260 in situ

Article Abstract:

An analysis of polychlorinated biphenyl (PCB) congener distributions in Woods Pond, a shallow impoundment on the river located in Lenox, MA, revealed that the PCBs are composed of partially dechlorinated Aroclors 1260 and 1254. All 181 samples collected from 94 locations in the site showed signs of dehlorination. The most extensively dechlorinated samples, however, lost only 11-19% of the meta chlorines and 2-7% of the para chlorines. This moderate dechlorination only caused a 20-28% decrease in PCB concentrations.

Analysis, River sediments

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Degradation of polychlorinated biphenyls induced by ionizing radiation in aqueous micellar solutions

Article Abstract:

Ionizing radiation allows the complete dechlorination of polychlorinated biphenyls (PCBs) in aqueous surfactant solutions. The primary chloride products were found to be directly proportional to the level of chlorination of the PCB congeners. Reductive dechlorination was the primary process that governed PCB transformation yielding lower chlorinated PCBs and biphenyl.

Research and Development in the Physical, Engineering, and Life Sciences, Water Pollution Control R&D, Usage, Environmental aspects, Ionizing radiation, Water pollution, Water pollution research

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Enrichment of microorganisms that sequentially meta, para-dechlorinate the residue of Aroclor 1260 in Housatonic River sediment

Article Abstract:

The use of 2,3,4,5,6-Pentachlorobiphenyl (23456-CB) to stimulate microbial populations present in river sediment enables a quick and extensive dechlorination of polychlorinated biphenyls. 23456-CB is able to achieve prime the microbes because it acts as an electron acceptor, which are limiting in the natural environment.

Bioremediation

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