2007 Fiscal Year Final Research Report Summary
Ecotoxicity evaluation of river water and sewage effluent using aquatic organisms and investigation of identification method for its causative toxic chemicals
| Project/Area Number |
18560531
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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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 | Kyoto University |
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Principal Investigator |
YAMASHITA Naoyuki Kyoto University, Faculty of Engineering, Lecturer (90391614)
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| Co-Investigator(Kenkyū-buntansha) |
TANAKA Hiroaki Kyoto University, Faculty of Engineering, Professor (70344017)
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| Project Period (FY) |
2006 – 2007
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| Keywords | exotoxicity / sewage effluent / river water / water pollution / chemical substance |
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| Research Abstract |
Many kinds of chemical substances have been developed with the advancement of science and technology. The chemical substances with low level concentrations released into the aquatic environment would make potential environmental pollution on the aquatic organisms. Therefore, it is important to evaluate the impact by waste effluents containing the chemicals and identify causative chemicals which show toxicity on the aquatic organisms.
In this research, acquisition of ecotoxicological data for chemical substances released into the aquatic environment and establishment of ecotoxicological experimental system using the solid phase extraction technique were conducted. Ecotoxicity of actual environmental samples such as river water and sewage effluent was evaluated and it was tried to identify the causative chemicals present in environmental water samples.
From the results of ecotoxicological tests for pharmaceuticals, which are recently focused as potential environmental pollutants in the aquatic environment, antibiotics showed higher toxicity to aquatic organisms compared with that for other types of pharmaceuticals. Ecotoxicological experimental system combined with the solid phase extraction technique was established and applied to the water samples taken from Lake Biwa and Yodo River basin. High toxicity was shown for the samples of sewage effluents and river water downstream from the sewage effluent discharge. Identification of the causative chemical responsible for toxicity on aquatic organisms contained in water samples taken from Yodo River basin was conducted. Combination of fractionating using HPLC and bioassay was proved to be useful tool for identifying causative chemicals and the substance of about 600 of molecular weight is suggested to be one of causative chemicals for the ecotoxicity.
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Research Products
(23 results)
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[Presentation] 淀川水系における医薬品の存在実態調査2007
Author(s)
杉下寛樹, 長尾亮治, 山下尚之, 田中宏明, 宝輪勲, 小西千絵
Organizer
第29回京都大学環境衛生工学研究会シンポジウム
Place of Presentation
京都
Year and Date
2007-07-19
Description
「研究成果報告書概要(和文)」より
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