Bioconcentration and trophic transfer of polychlorinated biphenyls and polychlorinated dibenzo-p-dioxins and dibenzofurans in aquatic animals from an e-waste dismantling area in East China
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Date
2015
Journal Title
Journal ISSN
Volume Title
Publisher
Environmental Science: Processes & Impacts
Abstract
Eight aquatic biota species were collected from an e-waste dismantling area in East China to investigate
bioconcentration and trophic transfer of polychlorinated biphenyls (PCBs), polychlorinated dibenzo-pdioxins
(PCDDs) and polychlorinated dibenzofurans (PCDFs). The mean concentrations of PCBs varied
widely from 6.01 104 to 2.27 106 pg per g dry weight (dw). The P25PCB concentrations in eels were
significantly higher than those in other species. The levels of PCDD/Fs changed from 8.13 pg per g dw in
toads to 617 pg per g dw in stone snails. World Health Organization-toxic equivalents (WHO2005-TEQs)
ranged from 2.57 to 2352 pg WHO-TEQ per g dw with a geometric mean value of 64.7 pg WHO-TEQ
per g dw, which greatly exceeded the maximum levels of 4 pg per g ww set by the European
Commission. The log-transferred bioconcentration factors (BCFs) of 25 PCB congeners ranged from 1.0
to 6.6, with the highest value for CB-205 in crucian carp and the lowest value for CB-11 in frog. A
parabolic correlation was observed between log BCF and log Kow (R2 ¼ 0.53, p < 0.001), where the
maximum value occurred at a log Kow of approximately 7. A similar correlation was also found in the plot
of log BCF against the number of chlorine atoms of PCBs (R2 ¼ 0.57, p < 0.001), indicating that mediumhalogenated
congeners of PCBs are more easily accumulated by aquatic biota species. There were no
significant correlations between the log-transferred concentrations and trophic levels of aquatic species,
suggesting that trophic magnification for PCBs and PCDD/Fs was not observed in this study.
Description
Keywords
Bioconcentration, Trophic transfer, Polychlorinated biphenyls, Polychlorinated dibenzo-p-dioxins
Citation
Zhu, C., Wang, P., Li, Y., Chen, Z., Li, W., Ssebugere, P., ... & Jiang, G. (2015). Bioconcentration and trophic transfer of polychlorinated biphenyls and polychlorinated dibenzo-p-dioxins and dibenzofurans in aquatic animals from an e-waste dismantling area in East China. Environmental Science: Processes & Impacts, DOI: 10.1039/c5em00028a