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

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 Kow of up to 6. For chemicals with higher Kow 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.

Superhydrophobic hierarchically structured surfaces in biology: evolution, structural principles and biomimetic applications

“…The term 'superhydrophobic' has been used informally since 1976 [24] and first used as 'superhydrophobic' in a publication [12]. In recent years, the synonymous and superfluous term ultrahydrophobic has been used.…”

Bioconcentration of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans in guppies after aqueous exposure to a complex PCDD/PCDF mixture: relationship with molecular structure

“…Several relationships have been established between log BCF and log Kow by different authors (e.g. Gobas et al, 1989). Generally, a good linear relationship exists for chemicals which are not biotransformed with log Kow < 6.…”

“…These log Kow values ranged from 6.2 to 8.1. The straight line indicates the relationship that was calculated for halogenated hydrocarbons by Gobas et al (1989) (Eq. 6).…”

Bioaccumulation of polychlorinated dibenzo-p-dioxins and dibenzofurans in the foodweb of Ya-Er Lake area, China

“…In many countries, studies have been carried out looking at pathways by which PCDD/F become incorporated into humans (Czuczwa and Hites, 1986;Wu, 1999;Muir and Yarechewski, 1988;Gobas et al, 1989). Because of the high lipophilic properties, PCDD/F can be highly accumulated in fish and other aquatic animals, therefore the organisms reflect the pollution extent of PCDD/F and are used as bioindicators at different environmental conditions.…”