UV/H_2O_2对氯消毒副产物TCM、DCBM的去除影响因素研究  

STUDY ON THE FACTORS AFFECTING REMOVAL OF TCM AND DCBM FROM DISINFECTION BY-PRODUCTS BY UV/H_2O_2

作　　者：员建 徐楷[1,2] 罗小平 苑宏英 

机构地区：[1]天津城建大学环境与市政工程学院,天津300384 [2]天津市水质科学与技术重点实验室,天津300384

出　　处：《环境工程》2017年第12期25-29,共5页Environmental Engineering

基　　金：国家自然科学基金(51308374)

摘　　要：针对UV/H_2O_2对氯化消毒副产物三氯甲烷(TCM)和一溴二氯甲烷(DCBM)的去除效果及影响因素进行研究,结果表明UV/H_2O_2方法对TCM和DCBM去除效果的影响因素有过氧化氢(H_2O_2)投加量、紫外光照强度、反应p H值和反应物初始浓度。通过不同的反应条件得出:H_2O_2在一定投加量变化范围(10~35 mmol/L)内,随投加量的增加,TCM和DCBM的去除率均呈先上升后下降趋势,H_2O_2最佳投加量分别为25,20 mmol/L;增大紫外光照(UV)强度,TCM和DCBM的去除率均显著提高;随初始p H值的增大,去除率均呈先上升后下降趋势,p H值为7.0时,去除率达到最佳;TCM和DCBM反应初始浓度分别为150,160μg/L时,其去除率最高,在有效时间内去除率分别为95.88%、92.56%。The removal efficiencies of chloroform（TCM）and bromodichloromethane（DCBM）from chlorinated disinfection by-products by UV/H_2O_2had been studied.Factors affecting the removal efficiencies of TCM and DCBM had been identified as H_2O_2dosage,UV light intensity,p H of the reaction medium,and the initial concentration of reactants.The reaction conditions were optimized.At H_2O_2dosages in the range 10~35 mmol/L,the removal efficiencies of TCM and DCBM first increased and then decreased.The optimal dosages of H_2O_2for TCM and DCBM were 25,20 mmol/L,respectively.The removal rates of TCM and DCBM increased significantly with the increasing UV illumination intensity.With the increase of initial p H,the removal efficiencies of TCM and DCBM first increased and then decreased.Removal rates were highest when p H of the reaction solution was at 7.0.TCM and DCBM removal efficiencies were highest（95.88%and 92.56%）when the substrate concentrations were 150,160μg/L,respectively,in suitably short time.

关 键 词：UV/H2O2 TCM DCBM 去除率 

分 类 号：TU991.25[建筑科学—市政工程]