UV—H_2O_2工艺降解饮用水中阿特拉津的试验研究  

Degradation of Endocrine Disruptor—Atrazine in Drinking Water by UV-H_2O_2 Process

作　　者：崔婧[1] 高乃云[1] 汪力[1] 魏宏斌[1] 

机构地区：[1]同济大学污染控制与资源化研究国家重点实验室,上海200092

出　　处：《中国给水排水》2006年第5期43-47,51,共6页China Water & Wastewater

基　　金：国家高技术研究发展计划(863)项目(2002AA601130);国家科技攻关计划重大项目(2003BA808A17)

摘　　要：采用紫外—过氧化氢(UV—H2O2)的光激发氧化工艺去除饮用水中的内分泌干扰物———阿特拉津,考察了影响降解效果的因素。试验结果表明:紫外—过氧化氢工艺对阿特拉津有较好的去除效果,阿特拉津的降解过程符合一级反应动力学模型。通过提高照射光强,可以提高对阿特拉津的去除速率。过氧化氢浓度对阿特拉津的降解具有促进和抑制的双重作用:当H2O2浓度<60 mg/L时,降解阿特拉津的一级反应速率常数随H2O2浓度的增加而线性增加;当H2O2浓度>80 mg/L时,该反应速率常数的增加速率变得缓慢;当H2O2浓度>120 mg/L时,阿特拉津的降解受到明显抑制。阿特拉津初始浓度对降解过程没有影响。自来水中羟基自由基捕获剂及有机物的存在,会降低阿特拉津的降解速率,而较低的pH值则有利于降解反应的进行。A study on degradation of atrazine （an endocrine disruptor） in drinking water by UV - H2O2 process was carried out. The main influencing factors and reaction kinetics of this technology were investigated. The results show that the removal efficiency of atrazine by UV - H2O2 process is high. The rate of degradation in aqueous solution follows first-order kinetics. The removal efficiency of atrazine can be greatly enhanced by increasing the intensity of UV radiation. The concentration of H2O2 has both positive and negative effects on the degradation rate of atrazine. When the concentration of H2O2 is less than 60 mg/L, first-order kinetics constant increases linearly with the increase of initial concentration of H2O2. When the concentration of H2O2 is more than 80 mg/L, the increasing rate of first-order kinetics constant is slowly. When the concentration of H2O2 exceeds 120 mg/L, degradation of atrazine is inhibited obviously. Initial concentration of atrazine does not influence the degradation process. The degradation rate is reduced by the presence of OH-radical scavengers and organics in tap water compared with the distilled water. The removal rate increases in the solution with lower pH.

关 键 词：内分泌干扰物 阿特拉津 UV 过氧化氢 反应动力学 

分 类 号：TU991.2[建筑科学—市政工程]