| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2021: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2020: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2019: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2018: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
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| Outline of Final Research Achievements |
Technologies and methodologies of supercritical microfluidics chemical system, which enables to separate target radionuclides using supercritical carbon dioxide (scCO2) media in 10nm-100 um-sized micro-nano channels, has been constructed. Micro-nano channels having different shapes and surface properties were fabricated, and selective extraction of metal ions through scCO2/water segment microflows. The scCO2/water microflows after extraction were continuously separated using an oil-water separator located at an exit port of the microchannel, and the concentrations of metal ions in the recovered water phase were measured by ICP mass spectrometry. The results showed that almost 100% extraction of metal ions such as uranyl ions was succeeded with a contact time of about 30 seconds. Compared with bulk-scale extraction, this supercritical microfluidics method makes it possible to complete the separation of metal ions at 3 digits faster or more without any secondary wastes.
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