Selective retention of polychlorinated biphenyl components in the mussel, Mytilus edulis.

نویسندگان

  • J Calambokidis
  • J Mowrer
  • M W Beug
  • S G Herman
چکیده

The retention properties of PCBs (polychlorinated biphenyls) were examined in the mussel (Mytilus edulis) over a period of 89 days. Mussels were transferred from a site of relatively high PCB contamination to a site of relatively low PCB concentration in Puget Sound, Washington. Retention of PCB components increased with increasing chlorine content. Concentrations of PCB decayed logarithmically with calculated half-lives ranging from 3 days for a PCB component with two and three chlorines to 50 days for a PCB component with six and seven chlorines. Components chosen to best represent the commercial PCB mixtures, Aroclor | 1242, 1254, and 1260, were estimated to have half-lives of 8, 23, and 39 days, respectively. The selective retention of the higher chlorinated biphenyls appear to be the result of lower water solubility of these components. Widespread environmental contamination by polychlorinated biphenyls (PCBs) has been documented (Risebrough et al. 1968, Hammond 1972, Peakall and Lincer 1970). The determination of the environmental impact of PCBs has been complicated by the varied chemical structure and properties of the individual components. Environmental samples from different levels on the food chain have been reported to contain PCBs varying in their component make-up (Koeman et al. 1969, Jensen et al. 1969). Organisms which were fed commercial PCB mixtures later contained PCBs with the ratios of the individual components significantly altered (Grant et al. 1971, Curley et al. 1971, Matthews and Anderson 1976). To better understand one of the processes that might explain these shifts, we studied the selective retention of PCBs by the mussel (Mytilus edulis) in a controlled field experiment.

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عنوان ژورنال:
  • Archives of environmental contamination and toxicology

دوره 8 3  شماره 

صفحات  -

تاریخ انتشار 1979