Bioaccumulation Factors (BAFs) and Biota to Sediment Accumulation Factors (BSAFs) for PCBs in pike and eels |
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Authors: | Stuart J. Harrad David J. T. Smith |
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Affiliation: | (1) Institute of Public & Environmental Health, School of Chemistry, University of Birmingham, B15 2TT Birmingham, UK |
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Abstract: | “Freely-dissolved” aqueous concentrations of 9 trichlorothrough heptachlorobiphenyls are reported, alongside those in sediments and fish from the R. Severn. For most congeners, BSAFs and lipid-normalised BAFs for pike exceed those for eels. Whilst R. Severn BSAFs are comparable with those for L. Ontario trout and New Bedford Harbour flounder, R. Severn BAFs are 1–2 orders of magnitude lower. This discrepancy may be due to inter-species variability, as well as inter-laboratory differences between operational definitions of “freely-dissolved” aqueous PCB, underlining that the same operational definition must be employed if R. Severn BAFs are extrapolated elsewhere. For eels, correlation of Log Kow with Log BAF is better (R2 = 0.66) than with BSAF (R2 = 0.13), whilst similar correlation coefficients (R2 = 0.81 and 0.82) were observed for pike. When Log Kow is plotted against BSAF and Log BAF for both species combined, better correlation is observed for Log BAF (R2 = 0.65), than BSAF (R2 = 0.36). For both species combined, the observed relationship between Log BAF and Log Kow for trichloro-through heptachlorobiphenyls is: Log BAF = 0.96 * Log Kow −0.24. |
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Keywords: | BAFs bioaccumulation factors biota to sediment accumulation factors BSAFs Eels PCBs Pike polychlorinated biphenyls |
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