阳极接触辉光放电等离子体降解水中溴乙酸研究  

Degradation of bromoacetic acids in aqueous solution by anodic contact glow discharge electrolysis

作　　者：付爽 尹凤超 李颖 高宏成 张超 杨海明[1] FU Shuang;YIN Fengchao;LI Ying;GAO Hongcheng;ZHANG Chao;YANG Haiming(School of Chemical Engineering,University of Science and Technology Liaoning,Anshan 114051,China;Anshan Ecological Environment Bureau,Anshan 114051,China;School of International Education,University of Science and Technology Liaoning,Anshan 114051,China)

机构地区：[1]辽宁科技大学化学工程学院,辽宁鞍山114051 [2]鞍山市生态环境局,辽宁鞍山114051 [3]辽宁科技大学国际教育学院,辽宁鞍山114051

出　　处：《辽宁科技大学学报》2022年第4期314-320,共7页Journal of University of Science and Technology Liaoning

基　　金：国家自然科学基金青年科学基金(51308276、51102126);辽宁省教育厅优秀人才项目(2015055);辽宁省自然科学基金(2015020634);鞍山市科技项目(2691);辽宁科技大学创新团队项目(2017TD02);辽宁省教育厅项目(2020LNJC06);辽宁科技大学大学生创新创业训练计划(X202110146103)。

摘　　要：溴乙酸(BAs)是一类有毒、难降解有机污染物。阳极接触辉光放电法(ACGDE)是一种新型水处理技术,可以在溶液中生成氧化剂羟基自由基(·OH)和还原剂活性氢(·H)/水合电子(e_(aq)^(-))。实验结果表明,ACGDE可将三溴乙酸(TBA)等BAs高效去除,反应240 min后,TBA的去除率达96.67%,总脱溴率达92.21%。Fe^(2+)和有机物异丙醇的存在均有利于TBA的降解。溶液pH在3~13范围内对TBA的降解影响明显,pH=9时TBA降解最慢。BAs的降解过程符合一级反应动力学。BAs降解速率随着BAs溴原子数的增加而加快。引发BAs降解的主要活性物质是羟基自由基(·OH)、活性氢(·H)/水合电子(e_(aq)^(-))。Bromoacetic acids(BAs)are toxic and hardly degraded organic pollutants.Anodic contact glow discharge electrolysis(ACGDE)is a new wastewater treatment technique.In ACGDE,oxidant of hydroxyl radical(⋅OH)and reductant of hydrogen radical(⋅H)/hydrated electron(e_(aq)^(-))can be generated.The experi-ment results show that,the BAs such as TBA were efficiently degraded by ACGDE.The removal rate of TBA was 96.67%and the total debromonation rate was 92.21%after a reaction time of 240 min.The presences of both Fe^(2+)and organic pollutants such as isopropanol facilitated the TBA degradation.The solution pH value in the range of 3~13 strongly affected the degradation rate of TBA,and the lowest degradation rate was reached at pH=9.The degradation of the BAs were all in accordance with the first-order reaction kinetics.The remov-al rates of the BAs increased with the increase in their bromine atom number.The active species of⋅OH and⋅H/e_(aq)^(-)play the key role for the degradation of the BAs.

关 键 词：阳极接触辉光放电等离子体 还原 溴代有机物 脱溴 反应动力学 

分 类 号：X703[环境科学与工程—环境工程]