[1]张晓,程婷,陈晨,等.紫外/亚硫酸钠还原体系对2,4-二溴酚的脱溴效能[J].中国给水排水,2020,36(23):21-26.
　ZHANG Xiao,CHENG Ting,CHEN Chen,et al.Debromination Efficiency of 2,4-Dibromophenol by UV/Sodium Sulfite Reduction System[J].China Water & Wastewater,2020,36(23):21-26.
点击复制

紫外/亚硫酸钠还原体系对2,4-二溴酚的脱溴效能

中国给水排水[ISSN:1000-4062/CN:12-1073/TU] 卷: 第36卷 期数: 2020年第23期 页码: 21-26 栏目: 出版日期: 2020-12-01
Title:
Debromination Efficiency of 2,4-Dibromophenol by UV/Sodium Sulfite Reduction System
作者:
张晓1,2，程婷1，陈晨3，王津南2,4,陈刚3，叶晨昊3，邓琴3
(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)
Author(s):
ZHANG Xiao1,2,CHENG Ting1,CHEN Chen3,WANG Jin-nan2,4,CHEN Gang3,YE Chen-hao3,DENG Qin3
(1. School of Environmental Ecology, Jiangsu Open University, Nanjing 210036, China; 2. Nanjing University & Yancheng Academy Environmental Protection Technology and Engineering, Yancheng 224005, China; 3. School of Environmental and Chemical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212100, China; 4. State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210093, China)
关键词:
卤代有机化合物; UV/SO2-3体系; 2; 4-二溴酚; 水合电子
Keywords:
halogenated organic compound; UV/SO2-3 system; 2; 4-dibromophenol; hydrated electron
摘要:
研究了UV/SO2-3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/SO2-3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/SO2-3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/SO2-3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/SO2-3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。
Abstract:
The debromination efficiency of 2,4-dibromophenol (2,4-DBP) by UV/SO2-3 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/SO2-3 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 pH value and reaction temperature, the 2,4-DBP degradation efficiency of the UV/SO2-3 system increased gradually. The quasi-first-order kinetic equation could better describe the degradation process of pollutants in the UV/SO2-3 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/SO2-3 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.
更新日期/Last Update: 2020-12-01