UV技术降解饮用水中二溴乙腈的研究  

Study on the degradation of dibromoacetonitrile in drinking water by UV technology

作　　者：丁春生[1] 姚俊[1] 霍建祺 余家明 杨明[1] DING Chunsheng;YAO Jun;HUO Jianqi;YU Jiaming;YANG Ming(College of Civil Engineering,Zhejiang University of Technology,Hangzhou 310023,China)

机构地区：[1]浙江工业大学土木工程学院,浙江杭州310023

出　　处：《浙江工业大学学报》2021年第2期163-166,193,共5页Journal of Zhejiang University of Technology

基　　金：浙江省自然科学基金资助项目(Y5110339)。

摘　　要：为去除饮用水中消毒副产物二溴乙腈(DBAN),采用紫外光(UV)降解水中DBAN,探究不同UV强度、温度、DBAN初始质量浓度以及溶液pH对其降解效果的影响。实验结果表明:DBAN的剩余质量浓度随反应的进行而逐渐变小,UV强度越大,降解效果越好,强度为40 W时最大去除率为55.2%;提高温度对DBAN的去除率提升较小;DBAN的去除率随初始质量浓度的增大而增大,初始质量浓度从10μg/L增加到100μg/L时,对应去除率从36.2%增加到67.7%,提升了31.57%;随着溶液pH的升高,DBAN的去除率逐渐上升,在pH=9时达到最高值62.88%;UV技术对DBAN的降解过程符合一级动力学规律。Ultraviolet light(UV)was used to degrade dibromoacetonitrile(DBAN)in drinking water,which is disinfection by-product.The effects of UV intensity,temperature,pH and initial mass concentration of DBAN on degradation of DBAN were explored.The results showed that:the mass concentration of DBAN gradually decreased with the progress of the degradation reaction.The greater the UV intensity,the better the degradation effect.A maximum removal rate of 55.2%was achieved when the UV intensity was 40 W.However,increasing temperature could only slightly improve the removal rate of DBAN.In addition,the removal rate increased with the initial mass concentration of DBAN,which were 36.2%and 67.7%when the initial mass concentration increased from 10μg/L to 100μg/L,respectively,showing an increase by 31.57%.Further,the removal rate of DBAN gradually increased with the pH,which showed a maximum value of 62.88%when the pH value was 9.Dynamic studies demonstrated that the degradation process of DBAN by UV technology conformed to the first-order kinetics.

关 键 词：饮用水 消毒副产物 二溴乙腈 紫外光 动力学 

分 类 号：X52[环境科学与工程—环境工程]