蛋白核小球藻与邻苯二甲酸二甲酯的相互作用研究

STUDY ON THE INTERACTION BETWEEN CHLORELLA PYRENOIDOSA CHICK AND DIMETHYL PHTHALATE IN WATER

本文运用评价化学品对藻类毒性的标准方法,得出邻苯二甲酸二甲酯对蛋白核小球藻的96h EC_(50)为313mg/l。实验结果表明,蛋白核小球藻对邻苯二甲酸二甲酯有明显的富集与降解作用,富集量24h最大达15.36mg/g,此后随时间的延长而逐步降低。5d降解率为66.8％。在对实验结果分析的基础上,提出了蛋白核小球藻对邻苯二甲酸二甲酯的二级降解反应动力学方程为-dc/dt=KNr,用此方程计算邻苯二甲酸二甲酯浓度与实测值之间的平均相对偏差为1.64％。

The standard method of algal bioassay for evaluating toxicity of toxic chemicals was applied and the 96h-EC50 of dimethyl phthalate (DMP) on inhibition the growth of chlorella pyrenoidosa was calculated as 313mg/l.It was found that chlorella pyrenoidosa has an ability of accumulating and biodegr-adating DMP. The algal accumulation reached maximum(15.36mg/g) at 24h, and declined gradually as time went on afterward. The biodegradation ratio of 5 days was 66.8%.On the basis of analysis of experimental result, a second -order kinetics equation of algal biodegradation was established (- dc/dt = KNr) .The average relative deviation between calculated values and observed values was 1.64% by using this equation.