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Solubilization of tetravalent actinoids by microbial activities

Research Project

Project/Area Number 18K19048
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 31:Nuclear engineering, earth resources engineering, energy engineering, and related fields
Research InstitutionJapan Atomic Energy Agency

Principal Investigator

TANAKA Kazuya  国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 原子力科学研究所 先端基礎研究センター, 研究副主幹 (60377992)

Co-Investigator(Kenkyū-buntansha) 山路 恵子  筑波大学, 生命環境系, 教授 (00420076)
Project Period (FY) 2018-06-29 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Fiscal Year 2020: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords微生物 / アクチノイド / 希土類元素 / 四価アクチノイド / シデロフォア
Outline of Final Research Achievements

Solubilization of tetravalent actinoids by microbial activities has not been well investigated in the environment. In this study, sediment and water samples collected at the two sites, Ningyo-toge and Yu-no-taki falls, were analyzed. Analytical results of Ningyo-toge suggested that organic complex of U might be stabilized in water by microbial acticities. At Yu-no-taki falls, Ce(IV) may have been complexed with organic compounds produced by microbial activities.

Academic Significance and Societal Importance of the Research Achievements

これまで微生物活動の影響を念頭においたアクチノイドの環境挙動に関する研究報告はほとんどなく、不明な点が多かった。本研究では、実際に微生物活動の影響を示唆する結果が得られており、関連分野に与える波及効果も含めて学術的意義は大きい。また、原子力発電の結果発生する放射性廃棄物の地層処分においては、アクチノイド等の放射性核種が環境中に漏えいした際の移行評価を必要がある。本研究の成果は、こうした移行評価を行う際の基礎科学的知見となり得るものであり社会的意義も大きい。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (5 results)

All 2021 2020 2019

All Journal Article (5 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 5 results,  Open Access: 2 results)

  • [Journal Article] Speciation of cesium in tree tissues and its implication for uptake and translocation of radiocesium in tree bodies2021

    • Author(s)
      Tanaka Kazuya,Kanasashi Tsutomu,Takenaka Chisato,Takahashi Yoshio
    • Journal Title

      Science of The Total Environment

      Volume: 755 Pages: 142598-142598

    • DOI

      10.1016/j.scitotenv.2020.142598

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Saccharides-mediated transformation of Ce during the formation of manganese (hydr)oxide.2020

    • Author(s)
      Deng, G., Ma, T., Tanaka, K., Ohnuki, T., Qiu, X. and Yu, Q.
    • Journal Title

      Geochim. Cosmochim. Acta

      Volume: 286 Pages: 143-158

    • DOI

      10.1016/j.gca.2020.07.028

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Application of M<sub>V</sub>-edge XANES to determination of U oxidation state in zircon2019

    • Author(s)
      Tanaka, K. and Takahashi, Y.
    • Journal Title

      GEOCHEMICAL JOURNAL

      Volume: 53 Issue: 5 Pages: 329-331

    • DOI

      10.2343/geochemj.2.0568

    • NAID

      130007724537

    • ISSN
      0016-7002, 1880-5973
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Journal Article] Adsorption mechanism of ReO4- on Ni-Zn layered hydroxide salt and its application to removal of ReO4- as a surrogate of TcO4-.2019

    • Author(s)
      Tanaka, K., Kozai, N., Yamasaki, Y., Ohnuki, T., Kaplan, D.I. and Grambow, B.
    • Journal Title

      Applied Clay Science

      Volume: 182 Pages: 1-8

    • DOI

      10.1016/j.clay.2019.105282

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Root-endophytic /Chaetomium cupreum/ chemically enhances aluminium tolerance in /Miscanthus sinensis/ via increasing the aluminium detoxicants, chlorogenic acid and oosporein.2019

    • Author(s)
      Haruma T, Yamaji K, Ogawa K, Masuya H, Sekine Y, Kozai N
    • Journal Title

      PLoS ONE

      Volume: 14(2) Issue: 2 Pages: 1-16

    • DOI

      10.1371/journal.pone.0212644

    • NAID

      120007128123

    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access

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Published: 2018-07-25   Modified: 2022-01-27  

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