PCBs DISTRIBUTION AND BIOCONCENTRATION TO MUSSEL IN SETO INLAND SEA

Abstract

PCBs concentrations in sea water and blue mussels were observed in Seto Inland Sea, and they were in the range from 0.5 to 4.0 ng/L (mean±standard deviation: 1.8±0.6 ng/L) and from 3.1 to 69.8 ng/g-wet (24.0±19.0 ng/g-wet), respectively. PCBs with chlorine substitution at positions of 2,4,5 were highly concentrated in blue mussels, while PCBs with chlorines at 2,3,4,5 were less accumulated. Two QSAR equations which show relationships between logBCF and logK_ow were proposed with application boundary of either equation at 7.5 of logK_ow. Threshold molecular weight of PCBs at which inhibition of PCBs ingestion to mussel happens was shown to be between 360.88 and 395.32 g.