Historical trends in organochlorine compounds in river basins identified using sediment cores from reservoirs

Article Abstract:

Chemical analyses of dated sediment cores from reservoirs to determine historical trends in water quality showed temporal trends in concentrations of polychlorinated biphenyls (PCBs), total DDT and chlordane. The findings indicated historical use and regulation of the compounds and variations in land use between reservoir drainages. Results also showed that the PCB and total DDT concentrations far exceed identified regional atmospheric fallout of PCBs and total DDT measured.

Water Supply and Irrigation Systems, Pesticide and Other Agricultural Chemical Manufacturing, Water supply, Industrial Organic Chemicals, Agricultural chemicals, not elsewhere classified, DDT, Polychlorinated Biphenyls, Cyclic Crude and Intermediate Manufacturing, Reservoirs, DDT (Insecticide), Reservoirs (Water), Organochlorine compounds, Organic chlorine compounds

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Persistent organochlorine residues and their aumulation kinetics in Baikal seal (Phoca sibirica) from Lake Baikal, Russia

Article Abstract:

Higher concentrations of organochlorine compounds (OCs) were detected in the Baikal seal from Lake Baikal, Russia, than those in other marine mammals. There was also a higher prevalence of contamination in male than female seals. It is suggested that Baikal seals have a high capacity to metabolize toxic contaminants and thus, can accumulate higher concentrations of OCs.

Physiological aspects, Seals (Animals), Organofluorine compounds, Organic fluorine compounds

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