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Evaluating of the contribution of long-range transport of zinc from the China continent based on zinc isotope ratio in lacustrine sediment core

Research Project

Project/Area Number 16K00622
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Environmental risk control and evaluation
Research InstitutionUniversity of Shizuoka

Principal Investigator

Sakata Masahiro  静岡県立大学, 食品栄養環境科学研究院, 教授 (20371354)

Research Collaborator Marumoto Kohji  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2018: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2017: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords中国大陸 / 越境汚染 / 亜鉛 / 亜鉛同位体比 / 宍道湖 / 堆積物コア / 越境輸送 / 水質汚染 / 発生源 / カドミウム / 湖沼堆積物 / 重金属汚染
Outline of Final Research Achievements

An upward historical trend of Zn concentration in surface layers (after 1980) of sediment cores has been observed in Lake Shinji, which is located along the coast of the Sea of Japan in western Japan. The δ66Zn of anthropogenic Zn, which was estimated from the Zn concentration and δ66Zn measured in a sediment core, was +0.13‰. This value is significantly different from the δ66Zn (-0.11 ± 0.065‰) of aerosols from Hirado City, Nagasaki Prefecture, which has been strongly affected by the long-range transport of air pollutants from the China continent, but is similar to the δ66Zn (approximately +0.1‰) of effluents discharged in urban areas. This suggests that the principal sources of Zn in the surface sediments in Lake Shinji are effluents including treated water from sewage treatment plants. Hence, it is evaluated that the contribution of the long-range transport of Zn from the China continent is smaller.

Academic Significance and Societal Importance of the Research Achievements

わが国の多くの水域では、依然として亜鉛の汚染が顕在化している。本研究では、宍道湖の堆積物コアの亜鉛同位体比を測定することにより、その原因が中国大陸からの越境汚染ではなく、主として下水処理水等の流入によるローカルな汚染によることが示唆された。この成果は、亜鉛によるヒトの健康や生態系への影響を評価し、効率的なリスク低減を図る上で有益である。また、大気への亜鉛の排出量が地球規模で増加していることが指摘されており、その寄与を国際的に評価することは重要である。本研究で示された堆積物コアの亜鉛同位体比を測定して発生源寄与率を推定する方法は有効であり、同種の研究が国際的に活発化することが期待される。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Research Products

    (3 results)

All 2018 2017

All Presentation (3 results) (of which Int'l Joint Research: 2 results,  Invited: 2 results)

  • [Presentation] Analysis of historical trend of pollution sources of zinc in Tokyo Bay based on zinc isotope ratio in sediment core2018

    • Author(s)
      Sakata, M., Okuizumi, S., Mashio, A. S., Ohno, T. and Sakata, S.
    • Organizer
      The 4th International Conference on Water resource and Environment (WRE2018)
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Analysis of historical trend of pollution sources of zinc in Tokyo Bay based on zinc isotope ratio in sediment core2018

    • Author(s)
      M. Sakata, S. Okuizumi, A. S. Mashio, T. Ohno, S. Sakata
    • Organizer
      The 4th International Conference on Water Resource and Environment
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 亜鉛同位体比に基づく水域の亜鉛汚染源の解明2017

    • Author(s)
      奥泉晶平,坂田昌弘,真塩麻彩実,大野剛,坂田周平
    • Organizer
      第26回環境化学討論会
    • Related Report
      2017 Research-status Report

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Published: 2016-04-21   Modified: 2020-03-30  

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