紫外/亚硫酸钠体系对2,4,6-三溴酚的脱溴效果及机理

doi:10.11962/1006-4990.2020-0008

无机盐工业 ›› 2020, Vol. 52 ›› Issue (12): 69-74.doi: 10.11962/1006-4990.2020-0008

紫外/亚硫酸钠体系对2,4,6-三溴酚的脱溴效果及机理

张晓^1,²(),程婷¹,陈晨³(),王津南^2,⁴,陈刚³,邓琴³,王磊³

1.江苏开放大学环境生态学院,江苏南京 210017
2.南京大学盐城环保技术与工程研究院
3.江苏科技大学环境与化学工程学院
4.南京大学环境学院污染控制与资源化国家重点实验室

收稿日期:2020-06-28 出版日期:2020-12-10 发布日期:2020-12-15
作者简介:张晓（1973— ）,女,博士,副教授,主要研究水处理新技术;E-mail：zhangxiao7376@sina.com
基金资助:
2016江苏高校“青蓝工程”中青年学术带头人培养对象;江苏省高等学校自然科学研究面上项目(17KJD610001);江苏省高等学校自然科学研究面上项目(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)

Debromination effect and mechanism of 2,4,6-tribromophenol by UV/sodium sulfite system

Zhang Xiao^1,²(),Cheng Ting¹,Chen Chen³(),Wang Jinnan^2,⁴,Chen Gang³,Deng Qin³,Wang Lei³

1. School of Environmental Ecology Science,Jiangsu Open University,Nanjing 210017,China
2. Nanjing University Yancheng Environmental Technology and Research Institute
3. School of Environmental and Chemical Engineering,Jiangsu University of Science and Technology
4. State Key Laboratory of Pollution Control and Resource Reuse,School of Environment,Nanjing University

Received:2020-06-28 Published:2020-12-10 Online:2020-12-15

摘要/Abstract

摘要：

研究了紫外/亚硫酸钠（UV/SO₃^2-）体系对2,4,6-三溴酚（2,4,6-TBP）的脱溴效果及影响因素,分析了还原体系2,4,6-TBP的脱溴过程、降解机理及降解路径。结果表明：UV/SO₃^2-还原体系对2,4,6-TBP的降解效果明显高于单独UV体系;亚硫酸钠浓度、pH与反应温度均对还原体系目标污染物的降解影响显著。随着亚硫酸钠浓度升高、pH上升及反应温度提高,UV/SO₃^2-体系2,4,6-TBP的降解效果逐渐增加。准一级动力学方程可描述不同亚硫酸钠浓度与反应温度时还原体系对目标污染物的降解过程。水合电子捕获剂的添加可有效抑制2,4,6-TBP的脱溴反应;UV/SO₃^2-体系污染物还原降解速率与溴离子产生率均高于单独UV体系。还原体系中2,4,6-TBP在水合电子作用下逐级脱溴降解为低毒性物质。

关键词: 卤代有机化合物, 2,4,6-三溴酚, 水合电子, UV/SO₃^2-还原体系

Abstract:

The debromination effect and influencing factors of 2,4,6-TBP in UV/SO₃^2-system were examined,and the debromination process,degradation mechanism and degradation pathway of 2,4,6-TBP in reduction system were analyzed.Results showed that：the degradation effect of UV/SO₃^2-reduction system on 2,4,6-TBP was significantly higher than that of UV system alone.Na₂SO₃ concentration,pH and reaction temperature had significant effects on the degradation effect of reduction system.With the increase of Na₂SO₃ concentration,pH and reaction temperature,the degradation effect of UV/SO₃^2- system 2,4,6-TBP increased gradually.The quasi-first-order kinetic equation could describe the degradation process of the target pollutant in the reduction system at different Na₂SO₃ concentrations and reaction temperatures.The addition of hydrated electron capture agent could effectively inhibit the debromination reaction of 2,4,6-TBP.The reduction rate and bromide ion yield of the pollutants in the UV/SO₃^2- system were higher than that of the UV system alone.2,4,6-TBP was degraded into low toxicity substances by hydration electrons in the reduction system.

Key words: halogenated organic compound, 2,4,6-tribromophenol, hydrated electron, reduction system of UV/SO₃^2-

中图分类号:

X131.2

张晓,程婷,陈晨,王津南,陈刚,邓琴,王磊. 紫外/亚硫酸钠体系对2,4,6-三溴酚的脱溴效果及机理[J]. 无机盐工业, 2020, 52(12): 69-74.

Zhang Xiao,Cheng Ting,Chen Chen,Wang Jinnan,Chen Gang,Deng Qin,Wang Lei. Debromination effect and mechanism of 2,4,6-tribromophenol by UV/sodium sulfite system[J]. Inorganic Chemicals Industry, 2020, 52(12): 69-74.

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c（Na₂SO₃）/ （mmol·L^-1）	k/min^-1	R²	c（Na₂SO₃）/ （mmol·L^-1）	k/min^-1	R²
0.00	0.114 3	0.976 5	5	0.230 4	0.949 1
0.25	0.117 6	0.971 8	10	0.354 3	0.919 8
1	0.157 0	0.974 1

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紫外/亚硫酸钠体系对2,4,6-三溴酚的脱溴效果及机理

Debromination effect and mechanism of 2,4,6-tribromophenol by UV/sodium sulfite system

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紫外/亚硫酸钠体系对2,4,6-三溴酚的脱溴效果及机理

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