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Elucidation of solvent extraction mechanism at liquid-liquid interface and development of separation method for fission products

Research Project

Project/Area Number 17K14919
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Nuclear engineering
Research InstitutionJapan Atomic Energy Agency

Principal Investigator

Kusaka Ryoji  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 原子力基礎工学研究センター, 研究職 (30733125)

Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2019: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords表面・界面 / 溶媒抽出 / ランタノイド / アクチノイド / 錯体 / 和周波発生分光 / 振動分光 / 表面 / 界面 / メカニズム / ウラン / 相間移動 / 再処理 / 金属錯体 / 分離変換 / 放射性廃棄物
Outline of Final Research Achievements

By applying vibrational sum frequency generation spectroscopy to an approximate model interface of solvent extractions, air/extractant/water gas-liquid interface, we aimed to elucidate the mechanism of metal migration from a water phase to an organic phase. In the solvent extraction system of lanthanide (Ln) using di-2-ethylhexyl phosphate (HDEHP) extractant, it was clarified that a Ln-HDEHP complex forms at the interface where Ln is sandwiched between HDEHP and water molecules, and we proposed that the formation of the interfacial complex induces the Ln extraction into an organic phase. On the other hand, in the solvent extraction system of uranium (VI) using tributyl phosphate (TBP) extractant, it was clarified that U(VI)-TBP interfacial complex does not form at the interface, and we proposed that U(VI)-TBP complex forms in an organic phase.

Academic Significance and Societal Importance of the Research Achievements

溶媒抽出の界面は溶媒抽出の性能を左右する働きを担っている。従って溶媒抽出の界面で何が起こっているのかを明らかにすることができれば、界面の化学反応の制御と利用により溶媒抽出技術の向上が狙えることにつながる。今回の成果は、溶媒抽出界面の分子科学的状態を明らかにしたことであり、今後、溶媒抽出の性能との連関や界面の化学状態の制御法を見出すことによって、界面反応に立脚したの溶媒抽出技術向上の手掛かりになると考えられる。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (15 results)

All 2020 2019 2018 2017 Other

All Journal Article (3 results) (of which Peer Reviewed: 2 results) Presentation (9 results) (of which Int'l Joint Research: 1 results) Remarks (3 results)

  • [Journal Article] 振動和周波発生分光法を用いたランタノイドおよびアクチノイド研究の界面化学への展開2020

    • Author(s)
      日下良二
    • Journal Title

      放射化学

      Volume: 41 Pages: 31-33

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Mechanism of phase transfer of uranyl ions: a vibrational sum frequency generation spectroscopy study on solvent extraction in nuclear reprocessing2018

    • Author(s)
      Kusaka Ryoji、Watanabe Masayuki
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 20 Issue: 47 Pages: 29588-29590

    • DOI

      10.1039/c8cp04558e

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] The structure of a lanthanide complex at an extractant/water interface studied using heterodyne-detected vibrational sum frequency generation2018

    • Author(s)
      Kusaka Ryoji、Watanabe Masayuki
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 20 Issue: 4 Pages: 2809-2813

    • DOI

      10.1039/c7cp06758e

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] 顕微フォトルミネッセンス分光法によるシリカゲル上のウラニルイオンとユウロピウムイオンの移動性の研究2020

    • Author(s)
      日下良二
    • Organizer
      日本原子力学会2020年春の年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 溶媒抽出元素分離技術の向上を目指した基礎科学研究2019

    • Author(s)
      日下良二、渡邉雅之
    • Organizer
      平成31年度日本原子力学会北関東支部若手研究者発表会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 振動和周波発生分光法を用いたランタノイドおよびアクチノイド研究の界面化学への展開2019

    • Author(s)
      日下良二
    • Organizer
      日本放射化学会第63回討論会(2019)
    • Related Report
      2019 Annual Research Report
  • [Presentation] Metal complexes formed at the surface of aqueous solutions studied by sum frequency generation spectroscopy2019

    • Author(s)
      Ryoji Kusaka and Masayuki Watanabe
    • Organizer
      日本化学会第99春季年会
    • Related Report
      2018 Research-status Report
  • [Presentation] Mechanism of liquid-liquid solvent extraction of uranyl by tributyl phosphate studied using vibrational sum frequency generation spectroscopy2018

    • Author(s)
      Ryoji Kusaka and Masayuki Watanabe
    • Organizer
      256th ACS National Meeting
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 振動和周波発生分光法による溶媒抽出機構の研究2018

    • Author(s)
      日下良二、渡邉雅之
    • Organizer
      第12回分子科学討論会
    • Related Report
      2018 Research-status Report
  • [Presentation] 和周波発生分光法によるウランの溶媒抽出機構の研究2018

    • Author(s)
      日下良二、渡邉雅之
    • Organizer
      2018日本放射化学会年会・第62回放射化学討論会
    • Related Report
      2018 Research-status Report
  • [Presentation] Surface of uranyl aqueous solution studied by heterodyne-detected vibrational sum frequency generation spectroscopy2018

    • Author(s)
      R. Kusaka, M. Watanabe
    • Organizer
      日本化学会第98春季年会
    • Related Report
      2017 Research-status Report
  • [Presentation] ヘテロダイン検出振動和周波発生分光法による金属抽出剤単分子膜/水界面におけるランタノイド錯体の構造研究2017

    • Author(s)
      日下良二、渡邉雅之
    • Organizer
      第11回分子科学討論会
    • Related Report
      2017 Research-status Report
  • [Remarks] JOPSS JAEA Originated Papers Searching System

    • URL

      https://jopss.jaea.go.jp/search/servlet/interSearch

    • Related Report
      2019 Annual Research Report
  • [Remarks] JOPSS

    • URL

      https://jopss.jaea.go.jp/search/servlet/search?5064259

    • Related Report
      2018 Research-status Report
  • [Remarks] JOPSS

    • URL

      https://jopss.jaea.go.jp/search/servlet/interSearch

    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2021-02-19  

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