2022 Fiscal Year Final Research Report
Cultivation and molecular biological analysis of copper reducing bacteria as for a copper recycling from low-grade metal ore
| Project/Area Number |
20K05407
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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 31020:Earth resource engineering, Energy sciences-related
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| Research Institution | Meijo University |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | 銅イオン還元 / 嫌気性細菌 / Alteromonas科 / Pseudomonas科 / 硫化銅 / 酸化銅 |
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| Outline of Final Research Achievements |
Anaerobic copper-ion reducing microcosms were constructed from river sediment or marine sludge. Next generation sequencing analyses revealed that dominant microbes were Pseudomonadaceae, Alteromonadaceae, Rhodocylaseae and Shewanellaceae. Considering that some bacterial strains which could reduce metals were affiliated with these bacterial families, it was revealed that these bacteria had resistance to copper and reduction of copper-ion under anaerobic condition in the microcosms. However, this research project still has some problems in the difficulty of stable subculturing and constructing of microcosms that could reduce copper-ion up to a practical copper recycling concentration.
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| Free Research Field |
微生物生態学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究で構築したマイクロコズムにおける銅還元能は1.5 mM程度でAlteromonas科やPseudomonas科が優占化したことが分かった．これらの結果は，現在行われている銅リサイクルに適用可能な濃度（5000 ppm）ではないが，本研究で構築した銅還元-嫌気性マイクロコズム中の細菌を環境から分離後，さらに銅還元遺伝子などを付与するといった遺伝子改変・育種によってエネルギー消費が少ない条件での生物的銅リサイクルについての可能性を有していると考えられる．
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