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Bioconcentration of polybrominated benzenes and biphenyls and related superhydrophobic chemicals in fish: Role of bioavailability and elimination into the feces

1989; Wiley; Volume: 8; Issue: 3 Linguagem: Inglês

10.1002/etc.5620080306

1552-8618

Frank A. P. C. Gobas, Kathryn E. Clark, Wan Ying Shiu, Donald Mackay,

Pharmaceutical and Antibiotic Environmental Impacts

Abstract Bioconcentration data are reported for a series of superhydrophobic chemicals including polybrominated biphenyls, brominated benzenes, mirex and polychlorinated biphenyls in the guppy ( Poecilia reticulata ). The observed bioconcentration factors follow a linear relationship with the 1‐octanol/water partition coefficient for chemicals with a log K ow of up to 6. For chemicals with higher K ow values, the bioconcentration factors were lower than expected from the linear relationship. This loss of linear correlation is shown to be caused by (a) a low fraction of bioavailable chemical in the water, (b) elimination of chemical into the feces, (c) an insufficient exposure time to achieve equilibrium and (d) fish growth. Procedures are presented by which the magnitudes and relative contributions of these factors to reducing the apparent bioconcentration factor from linearity can be determined.