2010 Fiscal Year Final Research Report
Evaluation and effect of coexisting heavy metals on river ecosystem considering attached algae and water insects
| Project/Area Number |
20360236
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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 | Iwate University |
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Principal Investigator |
UMITA Teruyuki Iwate University, 工学部, 教授 (30117072)
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| Co-Investigator(Kenkyū-buntansha) |
ITO Ayumi 岩手大学, 大学院・工学研究科, 准教授 (90312511)
ISHIKAWA Nao 岩手大学, 工学部, 助教 (10574121)
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| Project Period (FY) |
2008 – 2010
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| Keywords | 複合重金属 / 付着藻類 / 付着藻類 / 河川生態系 |
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| Research Abstract |
The effects of coexisting heavy metals on the survival of water insect and attached algae were investigated in the laboratory experiments. The LC_<50> values of Al, Cu and Cd for Epeorus were obtained. Coexisting Cu and Cd showed an antagonistic effect in low toxicity equivalence quantity and synergistic effect in high quantity. Polynuclear hydroxyl-Al accelerated the decay of Nizschia palea (diatom) and Chlorella vulgaris (green algae). The toxicity of coexisting two metals (Al, Zn, Cu or Cd) to algae was demonstrated.
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