| Project/Area Number |
18K11696
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 64020:Environmental load reduction and remediation-related
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| Research Institution | Okayama University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
石川 彰彦 岡山大学, 教育学研究科, 教授 (10263617)
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| Project Period (FY) |
2018-04-01 – 2023-03-31
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
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| Keywords | 鉄酸化細菌 / 高活性株 / 資源回収 / 環境浄化 / 生化学的解析 / 電気培養 / シュベルトマナイト / 固定化利用 / 微生物固定化 / A. ferrooxidans / 高活性鉄酸化細菌 |
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| Outline of Final Research Achievements |
We clarified the characteristics of useful enzymes contained in highly active iron-oxidizing bacterium, A. ferrooxidans usable for the recovery of metal resources isolated from nature and for the purification of the environment. In addition, we developed an electric culture apparatus capable of high cell-density cultivation, which made it possible to ensure continuity and high efficiency of activation through the immobilization of bacterial cells obtained by using this apparatus. Specifically, we established mercury vapor removal technology using the analysis of bacterial cells with high mercury volatilization activity and new enzyme reaction systems.
Furthermore, we examined a highly efficient production method for Schwertmannite and its composites produced by A. ferrooxidans using absorbents for wide ranging hazardous substances, deodorants, and functional substances, and electric culture methods.
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| Academic Significance and Societal Importance of the Research Achievements |
持続可能な開発目標において，資源利用効率の向上，環境浄化技術等が掲げられており，特に資源の枯渇や環境汚染の対策が急務の課題である。これらの対策に向けて高いエネルギーを使わない資源回収及び環境修復を行う技術として，微生物の生化学的機能を充分に活用する方法について検討を行っている。鉄酸化細菌 Acidithiobacillus ferrooxidans は，バクテリアリーチングや酸性鉱山排水処理などに利用できる菌として注目されている。我々は，保有する多くの単離株の中から資源回収及び環境浄化を行うための高度な活性を示す菌株の諸性質を解明及び高濃度電気培養装置を開発し実際への応用技術を示した。
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