2010 Fiscal Year Final Research Report
Effect of dissolved organic matter in urban wastewater on heavy metal speciation and trophic transfer
| Project/Area Number |
20360239
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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 |
NAKAJIMA Fumiyuki The University of Tokyo, 環境安全研究センター, 准教授 (30292890)
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| Co-Investigator(Kenkyū-buntansha) |
KASUGA Ikuro 東京大学, 大学院・工学系研究科, 助教 (20431794)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 亜鉛 / 錯形成 / スペシエーション / 生物移行性 / 下水処理 / 水 / 溶存有機物 / 緑藻 / 光分解 |
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| Research Abstract |
Dissolved organic matter in municipal wastewater treatment plant effluent had higher conditional stability constant of zinc and copper complexation than natural humic substance. Addition of the organic matter to culture media induced lower zinc uptake by green algae as well as less trophically available zinc in algal cells. Consequently, it is suggested that zinc toxicity to the predator in the environment is reduced by the organic matter. Result of biodegradation and photodegradation tests showed the stability of the organic matter under river water environment in terms of complexation characteristics.
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