Study on behavior of POPs and biomonitoring method as a bioindicator

通过监测濑户内海中PCBs同系物和异构体的浓度分布，探讨以贻贝为生物指示物的生物监测方法的适用性和生物累积特性。因此，高浓度的多氯联苯分布在大坂湾和播磨外海。将主成分分析应用于多氯联苯的同系物和异构体组成，可以对采样点进行分类，并可以预测多氯联苯的污染来源。贻贝中的PCB浓度表明，贻贝中的脂肪浓度影响PCB的积累。此外，发现多氯联苯的生物累积效率高于七氯苯进入贻贝是低的，因为高分子量。多氯联苯的2，4，5-取代异构体容易富集，2，3，4，5-取代异构体不易富集。这些结果证明了该方法的适用性和多氯联苯在贻贝中的生物富集特性。

The distribution of PCBs concentrations is monitored in terms of the homologues and the isomers in the Seto Inland Sea to discuss the applicability of the biomonitoring method with mussels as a bioindicator and bioaccumulation characteristics. As a result, the high concentrations of PCBs are distributed in Osaka Bay and the Open Sea of Harima. The principal component analysis applied to PCB homologue and isomer compositions can classify the sampling points and can predict the sources of PCBs pollutions. PCB concentrations in mussels show that the fat concentration in mussels affects the PCBs accumulations. Moreover, it is found that bioaccumulation efficiency of PCBs that are higher than the hepta-CBs into mussels is low because of the high molecular weight. The 2,4,5-substituted isomers of the PCBs are easily to be accumulated, while 2,3,4,5-substituted isomers are difficult to be accumulated. These results prove the applicability of this method and bioaccumulation characteristics of PCBs in mussels.