| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2014: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
To gain understanding on the long-term stability of the soil waste containing radiocesium for interim storage and disposal, effects of organic matter on the interaction between clay mineral surfaces and Cs were studied. Different sorption sites on mineral surfaces, including planar and interlayer surfaces as well as edges, were assumed to model the sorption experiment results to obtain the results that each site is affected differently by the presence of organic matter in the solution phase: sorption capacity of the interlayer sites of montmorillonite decreased with the presence of humic acid, and the selectivity on the illite FES site increased with the presence of fulvic acid. In addition, molecular dynamics simulation revealed the structure of a very strong innersphere complex formed at K-mica edges.
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