Abstract
Comparisons were made of the accumulation of a polychlorinated biphenyl (PCB) mixture from sediments and from water by the benthic worm Nereis diversicolor. Uptake from sediments was dose-dependent, attaining equilibrium concentration factors of approximately 3 to 4 after 2 months. Subsequent PCB elimination rates were concentration-dependent, with higher initial loss rates evident in the worms containing higher levels of PCBs. Accumulation of PCBs from water was much more rapid; concentration factors reached approximately 800 after only 2 weeks. Estimates were made of the relative importance of sediments and water as a source of PCBs to worms exposed to these contaminants in the natural environment. Calculations based on experimentally derived PCB concentration factors and ambient PCB levels in sediments and water suggest that compared to water, sediments contribute the bulk of these compounds to the worms. The possible mechanisms involved in the uptake of sediment-associated PCBs are discussed.
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Communicated by J.M. Pérès, Marseille
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Fowler, S.W., Polikarpov, G.G., Elder, D.L. et al. Polychlorinated biphenyls: Accumulation from contaminated sediments and water by the polychaete Nereis diversicolor . Mar. Biol. 48, 303–309 (1978). https://doi.org/10.1007/BF00391633
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DOI: https://doi.org/10.1007/BF00391633