紫外光与超声波耦合对氯酚水溶液的降解研究  

Study of the effect of US,UV and UV/US on the degradation of chlorophenols

作　　者：马海南[1] 华丹芸[1] 杨涛[1] 林逢凯[1] 杨磊[2] 

机构地区：[1]华东理工大学资源与环境工程学院,上海200237 [2]华东理工大学化学与分子工程学院,上海200237

出　　处：《环境污染与防治》2015年第8期52-57,共6页Environmental Pollution & Control

摘　　要：选择超声波(US)、紫外光(UV)、紫外光与超声波耦合(UV/US)3种方式对不同位置取代基的单氯酚和不同数目取代基的氯酚进行降解研究。结果表明,UV、US、UV/US对取代基位置不同的单氯酚的降解率大小均为3-氯酚>4-氯酚>2-氯酚;UV、UV/US对不同取代基数量的氯酚的降解率大小为2-氯酚>2,4-二氯酚>2,4,6-三氯酚,US单独作用下的降解率大小为2,4,6-三氯酚>2,4-二氯酚>2-氯酚;UV与US的耦合呈现出较优的协同效应,且耦合降解均以US的降解作用占主导;UV、US、UV/US对氯酚的降解均符合表观一级反应动力学。The regularity of chlorophenols degradation with different position and number of the substitute group by ultraviolet （UV）,ultrasonic （US） and UV/US processes under same experimental conditions were studied respectively. The results indicated that,the degradation efficiencies for chlorophenols with same substituent in differ- ent position by US, UV and UV/US in decline order were 3-chlorophenol〉4-chlorophenol〉2-chlorophenol. The deg- radation efficiencies for chlorophenols with different number of substituents by UV and UV/US in decline order were 2-chlorophenol〉2,4-dichlorophenol〉2,4,6-trichlorophenol. The degradation efficiencies for chlorophenols with dif- ferent number of substituents by US in decline order were 2,4,6-trichlorophenol〉 2,4-dichlorophenol〉 2-chlorophe- nol. The degradation efficiencies of UV/US coupling process were better than those of UV and US processes individu- ally,which demonstrated good synergetic effect. US process played a significant role in degradating chlorophenols by UV/US coupling process. And the degradation of chlorophenols by UV,US and UV/US processes followed the ap- parent first order reaction kinetics.

关 键 词：超声波 紫外光 氯酚 

分 类 号：X703[环境科学与工程—环境工程]