Development of Cs concentrating process into ionic associate phase using complexes

• Project/Area Number: 26550055
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Environmental engineering and reduction of environmental burden
• Research Institution: Tohoku University
• Principal Investigator: Yoshioka Toshiaki 東北大学, 環境科学研究科, 教授 (30241532)
• Project Period (FY): 2014-04-01 – 2016-03-31
• Project Status: Completed (Fiscal Year 2015)
• Budget Amount: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000); Fiscal Year 2015: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: セシウム / 濃縮 / イオン会合体

Outline of Final Research Achievements

Cs concentration into the ionic associate phase using complexes was investigated in this work. Tetraphenylborate (TPB－) as a complex molecule showed the highest Cs recovery rate from the water phase. In addition, the combination of n-pentyl amine (PA+) and perfluoro octanoic acid (PFOA-) as ionic associate phase showed the highest concentration rate of TPB-Cs complex into the ionic associate phase, suggesting that this technique will be one possibility to reduce the amount of sludge.

Research Products

• [Presentation] イオン会合体を用いた溶媒抽出法によるゼオライトからのCs脱着 (2016)
  • Author(s): 清水 翔太、熊谷 将吾、亀田 知人、吉岡 敏明
  • Organizer: 第8回廃棄物資源循環学会東北支部研究発表会
  • Place of Presentation: 戦災復興記念館（宮城県・仙台市）
  • Year and Date: 2016-02-08
• [Presentation] Desorption of cesium from zeolite A and mordenite by solvent extraction (2015)
  • Author(s): 清水 翔太、熊谷 将吾、亀田 知人、吉岡 敏明
  • Organizer: 平成27年度化学系学協会東北大会
  • Place of Presentation: 弘前大学（青森県・弘前市）
  • Year and Date: 2015-09-12
• [Presentation] 溶媒抽出によるA型ゼオライトからのCs脱着 (2015)
  • Author(s): 清水 翔太、熊谷 将吾、亀田 知人、吉岡 敏明
  • Organizer: 第26回廃棄物資源循環学会研究発表会
  • Place of Presentation: 九州大学（福岡県・福岡市）
  • Year and Date: 2015-09-02
• [Presentation] 錯形成物質を用いたCsの濃縮 (2015)
  • Author(s): 林 航太郎、諸橋直弥、服部徹太郎、亀田 知人、吉岡 敏明
  • Organizer: 第7回廃棄物資源循環学会 東北支部研究発表会
  • Place of Presentation: ハーネル仙台(宮城県・仙台市)
  • Year and Date: 2015-02-14
• [Presentation] Evaluation of the concentration of cesium by using ionic associates in water solution (2014)
  • Author(s): Kotaro Hayahi, Tomohito Kameda, Toshiaki Yoshioka
  • Organizer: International Symposium on Chenucak-Environmental-Bioneducak technology(isCEBT2014)
  • Place of Presentation: Taoyuan (Taiwan)
  • Year and Date: 2014-09-10 – 2014-09-14
• [Remarks] 東北大学大学院環境科学研究科 吉岡研究室ホームページ
  • URL: http://www.che.tohoku.ac.jp/~env/index.html