UV及UV-H2O2工艺降解阿特拉津的研究

采用紫外（UV）光解工艺及紫外-双氧水（UV—H2o2）联用工艺去除饮用水中内分泌干扰物——阿特拉津，研究了不同影响因素对阿特拉津降解效果的影响，试验结果表明：单独UV光解对阿特拉津有较好的去除效果，阿特拉津光解过程符合-级反应动力学模型．通过提高紫外光辐射强度，可以在短时间内提高阿特拉津的去除率．自来水中有机物及多种离子的存在，会降低阿特拉津的光解速率．UV-H2O2联用工艺对阿特拉津的去除具有协同作用．提高双氧水的初始质量浓度，可以提高光激发氧化反应的速率．辐射强度对阿特拉津降解效果的影响大于双氧水投加量的影响，增加辐射强度比增加双氧水质量浓度更有利于提高阿特拉津的降解速率．

Degradation of Endocrine Disruptor-Atrazine by UV Radiation and Combined UV-H2O2 Process

The degradation of endocrine disruptor(atrazine) in drinking water by ultraviolet(UV) radiation and combined UV-H_2O_2 has been studied in this paper.The main influencing factors of this technology were studied too.The results show that the removal efficiency of atrazine by UV radiation alone is high.The rate of photodegradation in aqueous solution follows first-order kinetics.The removal efficiency of atrazine can be greatly enhanced by increasing the intensity of UV radiation.The organic compounds and various ion in the water will reduce the degradation rate.In the case of the use of UV radiation and hydrogen peroxide,a synergistic effect was observed.The photodegradation rate of atrazine increases with the increasing of hydrogen peroxide concentration.The influence of UV light intensity on the atrazine removal efficiency is more important than that of hydrogen peroxide concentration.Increasing UV light intensity is more favorable to increasing hydrogen peroxide concentration in enhancing atrazine degradation rate.