| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Outline of Final Research Achievements |
In the recycling of low-concentration precious metals contained in metal wastewater, inexpensive and selective method to recover precious metals with high efficiency is required. In this study, we investigated the mechanism of precious metal recovery from the unicellular red alga Galdieria sulphuraria, which has been reported to selectively and efficiently recover precious metals from metal wastewater.
XAFS analysis revealed that the formation of inner-sphere complexes is important for their selective and efficient recovery, and that the stability of the formed inner-sphere complexes determined their adsorption and dissolution. Furthermore, scICP-MS analysis revealed that changes in chemical interaction between the cellular residues and precious metal species altered the behavior of the cell population adsorbing the precious metals.
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