Study on behavior of POPs and biomonitoring method as a bioindicator

从多氯联苯的同系物和异构体两方面监测了多氯联苯在塞户内海的浓度分布，探讨了以贻贝为生物指标的生物监测方法的适用性和生物富集特性。因此，多氯联苯的高浓度分布在大阪湾和哈里马公海。将主成分分析应用于多氯联苯同系物和异构体组成，可以对采样点进行分类，预测多氯联苯污染源。贻贝体内多氯联苯浓度表明，贻贝体内脂肪浓度影响多氯联苯的积累。此外，由于多氯联苯的分子量较大，其在贻贝体内的生物积累效率较低。多氯联苯的2,4,5-取代异构体容易积累，而2,3,4,5-取代异构体不易积累。这些结果证明了该方法的适用性和多氯联苯在贻贝体内的生物积累特性。

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.