| Budget Amount *help |
¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
Fiscal Year 2017: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2016: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2015: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2014: ¥8,060,000 (Direct Cost: ¥6,200,000、Indirect Cost: ¥1,860,000)
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| Outline of Final Research Achievements |
We investigated a microscopic structure of the organic phase containing the extracted coordination species of zirconium/tri-n-butyl phosphate (TBP) through extended X-ray absorption fine structure, small-angle neutron scattering, and molecular dynamics simulations. As a result, it is found that the coordination species aggregate due to a hydrogen-bonding network formed by interaction between the hydrophilic part of the coordination species with extracted water and nitric acid molecules. This reduces the hydrophilic surface area, resulting in subsequent formation of small primal clusters of 2 -3 nm in diameter. The primal clusters further aggregate due to van der Waals interaction to form large aggregates.
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