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Anthropogenic platinum and palladium in coastal areas

Research Project

Project/Area Number 16K12577
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Environmental dynamic analysis
Research InstitutionThe University of Tokyo

Principal Investigator

Obata Hajime  東京大学, 大気海洋研究所, 教授 (90334309)

Co-Investigator(Kenkyū-buntansha) 真塩 麻彩実  金沢大学, 物質化学系, 助教 (50789485)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
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: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Keywordsパラジウム / 白金 / 人為起源 / 沿岸域 / 堆積物 / 沿岸堆積物 / 内湾 / 海水の滞留時間 / 陰イオン交換樹脂 / 海水 / 海洋科学 / 環境分析 / 白金族元素 / ICP質量分析 / 河口域
Outline of Final Research Achievements

We developed a new analytical method for determination of picomolar level of palladium in natural waters by using inductively coupled plasma mass spectrometry. During the preconcentration process using the anion exchange resin column extraction, we successfully lowered procedural blank value and raised recovery, which will be able to apply to coastal waters. Moreover, we determined dissolved platinum in Japanese coastal waters. Especially in Tohoku area and Ariake Sea, high concentrations of platinum were found in bottom waters, which were probably derived from seafloor sediments. We also found some leachable fractions of platinum existed in the coastal sediments. Anthropogenic platinum on the land was transported to the estuarine and coastal areas, and deposited onto the seafloor. During this transportation process, the chemical speciation of platinum seemed to be changed.

Academic Significance and Societal Importance of the Research Achievements

白金族元素は地殻中の存在度が低く、水中で最も濃度の低い元素群である。一方、排気ガスを分解する自動車触媒など、産業では多量に使用されており、人為起源の白金族元素は水圏環境に拡がりつつあると予想される。しかし、分析が困難なため十分な観測は行われておらず、その拡がりが懸念されている。本研究では特にパラジウムの分析法の開発に取り組み、沿岸域に適用可能な分析法をほぼ確立できた。今後、沿岸域でのパラジウムの挙動解明につながると期待される。一方、これまで十分なデータが得られていなかった沿岸域における白金の分布とその循環過程を明らかにした。人為起源物質の水圏環境への移動を考える上で、重要な知見になる。

Report

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

    (6 results)

All 2018 2017 2016

All Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (3 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Organic complexation of zinc in a coastal hydrothermal area, Tachibana Bay, Nagasaki, Japan2018

    • Author(s)
      Kim, T., H. Obata, S. Takeda, K. H. Wong, A. S. Mashio and T. Gamo
    • Journal Title

      GEOCHEMICAL JOURNAL

      Volume: 52 Issue: 6 Pages: e29-e38

    • DOI

      10.2343/geochemj.2.0545

    • NAID

      130007534745

    • ISSN
      0016-7002, 1880-5973
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Dissolved platinum concentrations in coastal seawater: Boso to Sanriku, Japan.2017

    • Author(s)
      Mashio, A. S., H. Obata, and T. Gamo
    • Journal Title

      Archives of Environmental Contamination and Toxicology

      Volume: 73 Issue: 2 Pages: 240-246

    • DOI

      10.1007/s00244-017-0373-1

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Dissolved platinum in rainwater, river water and seawater around Tokyo Bay and Otsuchi Bay in Japan.2016

    • Author(s)
      A.S. Mashio, H. Obata, H. Tazoe, M. Tsutsumi, A. Ferrer i Santos, and T. Gamo
    • Journal Title

      Estuarine, Coastal and Shelf Science,

      Volume: 180 Pages: 160-167

    • DOI

      10.1016/j.ecss.2016.07.002

    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 有明海における白金の分布と挙動2017

    • Author(s)
      真塩麻彩実・小畑 元
    • Organizer
      2018年度日本地球化学会第64回年会
    • Related Report
      2017 Research-status Report
  • [Presentation] 房総半島沿岸から仙台湾における白金の分布と挙動2016

    • Author(s)
      真塩麻彩実, 小畑元
    • Organizer
      2016年度日本地球化学会
    • Place of Presentation
      大阪市立大学(大阪府・大阪市住吉区)
    • Year and Date
      2016-09-14
    • Related Report
      2016 Research-status Report
  • [Presentation] Distributions and geochemical cycles of platinum in Otsuchi Bay, Japan after the tsunami in 2011.2016

    • Author(s)
      Asami S. Mashio, H. Obata, H. Fukuda, and H. Ogawa
    • Organizer
      Goldschmidt Conference 2016
    • Place of Presentation
      パシフィコ横浜(神奈川県・横浜市西区)
    • Year and Date
      2016-06-28
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research

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

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