| Budget Amount *help |
¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Outline of Final Research Achievements |
We studied the ion-exchange property of cancrinite for environmental remediation. Cancrinite is stable mineral under high-alkaline and high-pH condition and has extra-framework sites for large cation such as Cs+ and Sr2+. Hence cancrinite is expected to be an effective adsorbent for radioactive nuclides, e.g., 134Cs and 90Sr, in high-alkaline solution. This study revealed that Na-cancrinite can remove Cs+ and Sr2+ from high-pH solution (pH > 12) and it is stable under such high-alkaline condition. It is notable that site selectivity of Cs+/Sr2+ for extra-framework sites of cancrinite was quantitatively determined using large single-crystals of cancrinite that were grown for the first time in this study.
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