論文 - 詳細
| RRC ID | 60292 |
|---|---|
| 著者 | Okibe N, Fukano Y. |
| タイトル | Bioremediation of highly toxic arsenic via carbon-fiber-assisted indirect As(III) oxidation by moderately-thermophilic, acidophilic Fe-oxidizing bacteria. |
| ジャーナル | Biotechnol Lett |
| Abstract |
OBJECTIVE:To enable removal of highly toxic As(III) from acidic waters by inducing indirect microbial As(III) oxidation by Fe-oxidizing bacteria via carbon-assisted redox-coupling between As(III) oxidation and Fe3+ reduction. RESULTS:Carbon-fiber (CF) was shown to function as an electron-mediator to catalyze chemical (abiotic) redox-coupling between As(III) oxidation and Fe3+ reduction. Accordingly, by taking advantage of Fe3+ regeneration by Fe-oxidizing bacteria, it was possible to promote oxidative removal of As(III) as ferric arsenate at moderate temperature. This reaction can be of use under the situation where a high-temperature treatment is not immediately available. Arsenic once concentrated as ferric arsenate on carbon-fibers can be collected to undergo phase-transformation to crystalline scorodite as the next re-solubilization/re-crystallization step at a higher temperature (70 °C). CONCLUSIONS:While extremely acidophilic Fe-oxidizing bacteria are widely found in nature, the As-oxidizing counterparts, especially those grown on moderately-thermophilic and mesophilic temperatures, are hardly known. In this regard, the finding of this study could make a possible introduction of the semi-passive, low-temperature As-treatment using readily available Fe-oxidizing bacteria. |
| 巻・号 | 41(12) |
| ページ | 1403-1413 |
| 公開日 | 2019-12-1 |
| DOI | 10.1007/s10529-019-02746-7 |
| PII | 10.1007/s10529-019-02746-7 |
| PMID | 31655925 |
| MeSH | Arsenic / metabolism* Bacteria / growth & development Bacteria / metabolism* Biodegradation, Environmental Biotransformation Carbon Fiber / chemistry* Iron / metabolism* Oxidation-Reduction Temperature |
| IF | 2.154 |
| 引用数 | 1 |
| リソース情報 | |
| 一般微生物 | JCM8867 |