Individual and combined toxic effects of chloroacetonitrile, aniline, and malathion on water flea

• Main Authors: Yuan, Tsz-Jiun, 袁慈君
• Other Authors: Chen, Chung-Yuan
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/46209639080499310455

碩士 === 國立交通大學 === 環境工程系所 === 101 === This study is using Daphnia magna 48hr-acute toxicity tests and 21days-chronic tests to evaluate the combined toxic effects of polar narcotic toxicant aniline and reactive organics nitrile and insecticide. According to the study of Chen and Yeh(1996), greater- than-additive (synergistic) effects will perform when two toxicants have different mechanisms and the flat concentration-response curves mixed. By contrast, if one of the toxicants has steep curve, less-than-additive (antagonistic) will appear. We could find the toxicity test of this research are not corresponding with the above literature result. And the results of combined acute toxicity tests are not conform with the prediction by RA model. In the combined chronic toxicity tests, the group of Chloroacetonitrile and Malathion may perform danger effects to environmental organisms. The environmental risk assessments of the present study reveals the chronic toxicity effects may be underestimated by using EC10 value instead of NOEC value.