Daphnia magna에 의한 水質汚染物質의 毒性 評価方法에 관한 硏究

A Study on Evaluation Technique of Biotoxicity by Daphnia magna to Heavy Metal in Wastewater

This study was performed to develope an acute toxicity evaluation model, by Daphnia magna, named as Equitox that imply how many times of pollutant’s toxicity equivalent to reference chemical (K₂ Cr₂ O₇). The method presented in this paper may be applied for control of toxic industrial wastewaters. The experimental results in crude data obtained from D.magna toxicity tests at a given conditions are as follows. 1. In cases of a single toxicant, mobility of D.magna tended to be linearly proportional to the extent of toxic element concentration. 2. In case of a metal surface treatment wastewater, mobility of D. magna showed a curved relation to applied concentrations of wastewater. 3. An acute toxicity evaluation model developed by D.magna， Equitox, is presented, but needed of a standardization in practice. 4. Further studies should be carried out in relation to evaluation of reference chemical toxicity at an optimum condition and to a long term or chronic toxicity evaluation methods.