Bioaccumulation of polychlorinated biphenyls and chlorinated pesticides by the Asiatic clam Corbicula fluminea: its use as sentinel organism in the Rio de La Plata Estuary, Argentina

Article Abstract:

The ability of the Asiatic clam, Corbicula fluminea, to absorb polychlorinated biphenyls (PCBs) and chlorinated pesticides was investigated to evaluate the usefulness of the clams as sentinel organisms. Samples were collected from seven locations along the Rio de La Plata coast in Argentina. Suspended particulate matter (SPM) was separated from the clams to determine their bioaccumulation kinetics with respect to water, sediments and SPM. The bioaccumulation factor obtained indicates that the Corbicula fluminea is an effective organochlorine compound concentrator.

Analysis, Environmental aspects, Pesticides, Organic water pollutants, Organic water pollution, Clams

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Stimulation of microbial para-dechlorination of polychlorinated biphenyls that have persisted in Housatonic River sediment for decades

Article Abstract:

The microbial dechlorination of polychlorinated biphenyls was stimulated by adding 2,5,3',4'-tetrachlorobiphenyl to aroclor-contaminated water from Woods Pond in Lenox, MA. The samples were then incubated under methanogenic conditions. The results showed that this new approach was effective in stimulating rapid microbial dechlorination of polychlorinated biphenyls that have persisted in sediments for decades.

Research, Management, River sediments

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Full-scale hydrotreatment of polychlorinated biphenyls in the presence of used lubricating oils

Article Abstract:

Dechlorination via catalytic hydrogenation is one of the most effective technologies for the safe destruction of polychlorinated biphenyls (PCB). With this process, PCBs are completely converted to harmless, useful hydrocarbon products under very mild conditions. Because the by-products are all liquids, they can be easily isolated and analyzed to determine in traces of PCBs still remain.

Usage, Evaluation, Production processes, Waste management, Chemical processes, Hydrogenation, Petroleum waste, Petroleum wastes, Hydrotreating catalysts

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