| Project/Area Number |
26820394
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Earth system and resources engineering
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| Research Institution | Kyushu University |
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Principal Investigator |
Okibe Naoko 九州大学, 工学(系)研究科(研究院), 准教授 (30604821)
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| Project Period (FY) |
2014-04-01 – 2016-03-31
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| Project Status |
Completed (Fiscal Year 2015)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | レアメタル / 貴金属 / 都市鉱山 / バイオ回収 / ナノ粒子 / 超好酸性鉄還元細菌 / パラジウム / バナジウム / 還元回収 / 極限環境 / クロム |
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| Outline of Final Research Achievements |
In order to eventually recover valuable metals from urban mine leachete, this study investigated the utility of extremely acidophilic Fe(III)-reducing bacteria mainly for Pd(II) reduction to produce Pd(0) nanoparticles, and also for V(V) reduction to recover V precipitates. Pd(0) nanoparticles were effectively produced by combination of biological Pd(0) nucleation step and chemical crystal growth step. Using active cells together with sodium formate as electron donor was critical to produce well-distributed, smaller-sized Pd(0) nanoparticles on cell surface. Soluble V(V) was also successfully recovered even under acidic pHs as V(IV)-precipitates mainly on the cell surface. A part of V was recovered intracellularly as nanoparticles.
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