The indiviual toxicity of acrylonitriles and the combined effects with aldehydes using a closed-system algal test.

• Main Authors: Gung, Jiun-Ju, 龔俊竹
• Other Authors: Chen, Chung-Yuan
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/80358020273280380190

碩士 === 國立交通大學 === 環境工程系所 === 97 === The purpose of the present study is to evaluate the toxicity of acrylonitrile and its derivatives, and their combined effects with aldehydes, using a closed-system algal toxicity test technique. Among all the acrylonitrile derivatives, 2-chloroacrylonitrile was found to be the most toxic compounds, while methacrylonitrile was the least toxic one. For the low-toxic-effect concentrations, NOEC values were generally lower than the EC10 values and, therefore, were considered as being able to provide better protection to the aquatic environment than the EC10 values. For the combined-effect studies, synergistic effects were consistently observed when both toxicants depict flat dose-response curves. Though the observed synergistic effects were stronger than that predicted by the non-interactive multiple toxicity model, the applied model did provide satisfactory predictions for the joint action modes for binary mixtures of toxicants. On the other hand, less-than-additive effects were observed for two toxicants associated with steep dose-response curves.