Study on behavior of POPs and biomonitoring method as a bioindicator

2004 Fiscal Year Final Research Report Summary

• Project/Area Number: 15510050
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Risk sciences of radiation/Chemicals
• Research Institution: KYOTO UNIVERSITY
• Principal Investigator: TSUNO Hiroshi KYOTO UNIVERSITY, Graduate School of Engineering, Professor, 工学研究科, 教授 (40026315)
• Co-Investigator(Kenkyū-buntansha): YAMADA Harumi KYOTO UNIVERSITY, Graduate School of Engineering, Associate Professor, 工学研究科, 助教授 (40089123) ; HIDAKA Taira KYOTO UNIVERSITY, Graduate School of Engineering, Assistant Professor, 工学研究科, 助手 (30346093)
• Project Period (FY): 2003 – 2004
• Keywords: mussel / bioindicator / PCB / bioaccumulation / concentrations factor / Seto Inland Sea / isomer / prediction of sources of PCBs pollutions

Research Abstract

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.