| Project/Area Number |
23310055
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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 |
Environmental technology/Environmental materials
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| Research Institution | Nagoya University |
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Principal Investigator |
KATAYAMA arata 名古屋大学, エコトピア科学研究所, 教授 (60185808)
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| Co-Investigator(Kenkyū-buntansha) |
鈴木 大典 名古屋大学, エコトピア科学研究所, 助教 (10591076)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥19,760,000 (Direct Cost: ¥15,200,000、Indirect Cost: ¥4,560,000)
Fiscal Year 2013: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2012: ¥5,980,000 (Direct Cost: ¥4,600,000、Indirect Cost: ¥1,380,000)
Fiscal Year 2011: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
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| Keywords | 固体電子メディエータ / 脱ハロゲン反応 / 芳香族ハロゲン化合物 / 酸化還元中心 / 細胞外電子伝達系 / ヒューミン / ペンタクロロフェノール / 四臭化ビスフェノールA / 嫌気脱ハロゲン反応 / 嫌気的脱塩素反応 / キノン構造 / 化学的安定性 / 微生物付着 / 腐植物質 / 電子メディエータ / 還元的脱ハロゲン反応 / 13C-NMR / サイクリックボルタンメトリ / ESR / FT-IR |
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| Research Abstract |
Solid-phase humin, a fraction of humic substances in soil and sediment which is not soluble in any pH condition, was found to function as external electron mediator for the anaerobic consortium reductively-dechlorinating pentachlorophenol. The humic acids extracted from the same source did not support the pentachlorophenol dechlorination. The redox-reacting centers of humin were suggested to be quinone structure or iron-organic acid chelating complex, based on the analyses using FT-IR, NMR, ESR, cyclic voltammetry. It was suggested that a novel Dehalobacter sp., requiring reduced-form humin as electron donor and pentachlorophenol as electron acceptor for the organohalide respiration, was present in the enriched consortium. It was considered that the electrons transfer from humin to microbial cells directly.
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