| Project/Area Number |
16360261
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Civil and environmental engineering
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| Research Institution | The University of Tokyo |
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Principal Investigator |
FUKUSHI Kensuke The University of Tokyo, IR3S, Associate Professor, サスナビリティ学連携研究機構, 助教授 (30282114)
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| Project Period (FY) |
2004 – 2006
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| Project Status |
Completed (Fiscal Year 2006)
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| Budget Amount *help |
¥12,400,000 (Direct Cost: ¥12,400,000)
Fiscal Year 2006: ¥4,500,000 (Direct Cost: ¥4,500,000)
Fiscal Year 2005: ¥4,400,000 (Direct Cost: ¥4,400,000)
Fiscal Year 2004: ¥3,500,000 (Direct Cost: ¥3,500,000)
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| Keywords | arsenic / soil contamination / biological / methyl arsenic / メタン菌 / 土壌浄化 / メチルヒ素 / メタン生成菌 / バングラディシュ / タイ / アルシンガス / 微生物 / ヒ素メチル化酵素 / 嫌気性 / 消化汚泥 |
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| Research Abstract |
Biological gasification of arsenic can be a mechanism of arsenic remediation from solids including soil. his study confirmed biological methylation (gasification) of arsenic by microorganism present in soil of contaminated site under anaerobic batch culture condition. Production of considerable amount of less toxic monomethylarsine was observed from the batch culture. This observation established the platform of using the process of biological gasification of arsenic for soil clean up. Soil column tests were further conducted to observe the feasibility of practical application of this process for bioremediation of arsenic. Similar to batch test, arsenic gasification was observed in soil column with monomethylarsine as the main gaseous species. The observed rate of arsenic gasification was low in soil column test. The rate of gasification can be bioaugmented by adding some other anaerobic cow dung based microbes, which were grown in reactors and acclimated to arsenic previously. It was observed that gasification rate of arsenic was rapidly increased after augmentation up to 8 times. The fate of arsenic in the environment is not known yet. The application arsenic bioremediation can be introduced after investigation of the fate of volatile arsenic in the environment.
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