| Project/Area Number |
24651079
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Environmental technology/Environmental materials
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| Research Institution | Osaka University |
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Principal Investigator |
SATOSHI Soda 大阪大学, 工学(系)研究科(研究院), 准教授 (30322176)
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| Co-Investigator(Kenkyū-buntansha) |
IKE Michihiko 大阪大学, 大学院工学研究科, 教授 (40222856)
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| Co-Investigator(Renkei-kenkyūsha) |
KURODA Masashi 大阪大学, 大学院工学研究科, 助教 (20511786)
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| Research Collaborator |
TERASAWA Kanako
NAGAO Tomoaki
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| Project Period (FY) |
2012-04-01 – 2015-03-31
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| Project Status |
Completed (Fiscal Year 2014)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
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| Keywords | バナジウム / 微生物反応 / 沈殿 / 資源回収 / レアメタル / 水環境 / 微生物還元 / 微生物 / 元素戦略 |
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| Outline of Final Research Achievements |
Technologies for vanadium recovery from water environments are needed for sustainable development. Several bacteria capable of reducing vanadium from soluble V(V) to poorly soluble V(IV) have been reported. They have a potential to precipitate vanadium with other chemicals. The objective of this study was to elucidate culturing conditions affecting vanadium recovery by two vanadate-reducing bacteria: strain V4, which was newly isolated from a sediment sample, and an authentic strain Shewanella oneidensis MR-1. Both bacterial strains were able to reduce V(V) especially in nutrient-poor media. TEM-EDS analysis showed that strain V4 and strain MR-1 formed precipitation containing V, P, and Ca. A larger amount of soluble vanadium was removed by bacteria pre-cultured at high phosphate and calcium concentrations, suggesting they formed precipitation in the form of Cax(VO)y(PO4)z.
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