bioconcentration processes of superhydrophobic organic compounds using species differences in the mussels

2021 Fiscal Year Final Research Report

• Project/Area Number: 19K12367
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 64010:Environmental load and risk assessment-related
• Research Institution: Tokyo University of Agriculture and Technology
• Principal Investigator: Mizukawa Kaoruko 東京農工大学, (連合)農学研究科(研究院), 助教 (50636868)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: 生物濃縮 / 超疎水性化合物 / 溶存態 / 懸濁態 / イガイ

Outline of Final Research Achievements

In order to prove the hypothesis that differences in exposure via dissolved and suspended forms are reflected in the bioaccumulation potential of the superhydrophobic organic compound (LABs), exposure experiments were conducted on two mussel species that are considered to have different primary exposure pathways to organic contaminants, pathways that differ from those in the real environment. The results suggest that the homologue composition of LABs differs from that in the real environment when the exposure pathways are different, supporting the hypothesis.

Free Research Field

環境化学

Academic Significance and Societal Importance of the Research Achievements

有機化合物の生物濃縮性は疎水性と共に増すが、高すぎると逆に下がることが知られている。しかし、このような超疎水性化合物が全く生物に移行しないわけではなく、その移行条件を探ることは超疎水性化合物に分類される多くの物質の濃縮性を把握する上で重要である。本研究で得られた結果から、溶存態の影響が強い二枚貝は、超疎水性化合物のうち比較的疎水性が低い物質の寄与が多くなることが示唆された。