Development of the cesium selective adsorbent

• Project/Area Number: 26410249
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Inorganic industrial materials
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: Makita Yoji 国立研究開発法人産業技術総合研究所, 健康工学研究部門, 研究グループ長 (80357988)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Project Status: Completed (Fiscal Year 2016)
• Budget Amount: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000); Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000); Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: イオン交換 / 無機イオン交換体 / セシウム / イオン交換体

Outline of Final Research Achievements

The acid treatment sample of the sintered material was obtained by heating a mixture of rubidium carbonate and niobium oxide at 500 or 600 degrees C. The distribution coefficient of cesium on the acid treatment sample was higher than those of other alkali metal ion. This result indicates that the sample have high affinity toward cesium ion. The distribution coefficient was increased by replacing about 10 % of niobium oxide with zirconium oxide in the mixture. These samples adsorbed about 90 % of cesium from seawater diluted 2 times. On the other hand, the column chromatography using the diluted sea water contaminating 1ppm-Cs didn’t show good breakthrough curve of cesium.

Research Products

• [Presentation] ニオブ酸化合物のアルカリ金属イオンに対する交換特性 (2015)
  • Author(s): 槇田洋二，苑田晃成
  • Organizer: 第31回日本イオン交換研究発表会
  • Place of Presentation: 金沢工業大学扇が丘キャンパス（石川県野々市市）
  • Year and Date: 2015-10-24
• [Presentation] 層状ペロブスカイト型HCa2Nb3O10・1.5H2Oによるセシウムイオンの除去技術 (2014)
  • Author(s): 槇田洋二、Ramesh Chitrakar、苑田晃成
  • Organizer: 第3回環境放射能除染研究発表会
  • Place of Presentation: 郡山市民文化センター(郡山市)
  • Year and Date: 2014-07-03
• [Presentation] トドロカイト型マンガン酸化物のセシウムイオン選択性 (2014)
  • Author(s): 苑田晃成、槇田洋二、Ramesh Chitrakar
  • Organizer: 第3回環境放射能除染研究発表会
  • Place of Presentation: 郡山市民文化センター (郡山市)
  • Year and Date: 2014-07-03
• [Book] 放射性物質対策技術―除去、モニタリング、装置・システム開発― （分担執筆） (2015)
  • Author(s): 槇田洋二、Ramesh Chitrakar、苑田晃成
  • Total Pages: 12
  • Publisher: 株式会社エヌ・ティー・エス
• [Patent(Industrial Property Rights)] セシウム選択的吸着剤の製造方法 (2015)
  • Inventor(s): 槇田洋二、苑田晃成
  • Industrial Property Rights Holder: 国立研究開発法人産業技術総合研究所
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2015-202260
  • Filing Date: 2015-10-13