紫外/亚硫酸钠还原体系对2,4-二溴酚的脱溴效能  

Debromination Efficiency of 2,4-Dibromophenol by UV/Sodium Sulfite Reduction System

作　　者：张晓[1,2] 程婷 陈晨[3] 王津南 陈刚 叶晨昊[3] 邓琴 ZHANG Xiao;CHENG Ting;CHEN Chen;WANG Jin-nan;CHEN Gang;YE Chen-hao;DENG Qin(School of Environmental Ecology,Jiangsu Open University,Nanjing 210036,C hina;Nanjing University&Yancheng Academy Environmental Protection Technology and Engineering,Yancheng 224005,C hina;School of Environmental and Chemical Engineering,Jian gsu University of Science and Technology,Zhenjiang 212100,China;State Key Laboratory of Pollution Control and Resource Reuse,School of Environment,Nanjing University,Nanjing 210093,C hina)

机构地区：[1]江苏开放大学环境生态学院,江苏南京210036 [2]南京大学盐城环保技术与工程研究院,江苏盐城224005 [3]江苏科技大学环境与化学工程学院,江苏镇江212100 [4]南京大学环境学院污染控制与资源化研究国家重点实验室,江苏南京210093

出　　处：《中国给水排水》2020年第23期21-26,共6页China Water & Wastewater

基　　金：2016江苏高校“青蓝工程”中青年学术带头人培养对象项目;江苏省高等学校自然科学研究面上项目(17KJD610001、17KJD610002);江苏开放大学校级科研平台资助项目;江苏开放大学“十三五”规划科研课题(17SSW-Z-Q-027);江苏省环境工程重点实验室科研开放基金资助项目(KF2015011)。

摘　　要：研究了UV/SO23-还原体系在不同条件下对2,4-二溴酚(2,4-DBP)的脱溴效能,分析了目标污染物的脱溴过程、降解机理及降解路径。结果表明,UV/SO23-还原体系对2,4-DBP的降解效果高于单独UV体系;亚硫酸钠浓度、pH值与反应温度均对目标物的降解有较大影响。随着亚硫酸钠浓度、初始pH值和反应温度的升高,UV/SO23-体系对2,4-DBP的降解效果逐渐增强。准一级动力学方程可较好地描述不同亚硫酸钠浓度与反应温度条件下UV/SO23-对污染物的降解过程。水合电子捕获剂会显著抑制2,4-DBP的脱溴反应;UV/SO23-体系的2,4-DBP脱溴率与溴离子产率均高于单独UV体系;2,4-DBP在水合电子作用下的降解中间产物为4-溴酚、苯酚与少量的4,4’-联苯二酚。The debromination efficiency of 2,4-dibromophenol(2,4-DBP)by UV/SO23-system at different conditions was investigated,and the debromination process,degradation mechanism and degradation pathway of the target pollutants were analyzed.The 2,4-DBP degradation efficiency of UV/SO23-reduction system was significantly higher than that of the individual UV system.Sodium sulfite concentration,pH value and reaction temperature had significant effects on the degradation of the target pollutants.With the increase of sodium sulfite concentration,initial p H value and reaction temperature,the 2,4-DBP degradation efficiency of the UV/SO23-system increased gradually.The quasi-first-order kinetic equation could better describe the degradation process of pollutants in the UV/SO23-system with different sodium sulfite concentrations and reaction temperatures.The hydrated electron capture agent could effectively inhibit the debromination reaction of 2,4-DBP.The 2,4-DBP debromination efficiency and bromide ion yield of the UV/SO23-system were higher than those of the individual UV system.Under the action of hydration electrons,the intermediate products of 2,4-DBP were 4-bromophenol,phenol and a small amount of 4,4’-biphenyldichol.

关 键 词：卤代有机化合物 UV/SO32-体系 2 4-二溴酚 水合电子 

分 类 号：TU992[建筑科学—市政工程]