典型卤代苯酚在Na_(2)SO_(3)/UV体系中的还原降解与脱卤  

Reductive degradation and dehalogenation of typical halophenols in Na_(2)SO_(3)/UV system WANG Ziyu

作　　者：王子钰 王凯 张志勤 王若清 李旭春[1] 马军 WANG Ziyu;WANG Kai;ZHANG Zhiqin;WANG Ruoqing;LI Xuchun;MA Jun(School of Environmental Science and Engineering,Zhejiang Gongshang University,Hangzhou 310018;Weifang Qingping Chemical Engineering Technology Co.,Ltd.,Weifang 261021;School of Environment,Harbin Institute of Technology,Harbin 150090)

机构地区：[1]浙江工商大学环境科学与工程学院,杭州310018 [2]潍坊清平化工工程技术有限公司,潍坊261021 [3]哈尔滨工业大学环境学院,哈尔滨150090

出　　处：《环境科学学报》2025年第2期69-77,共9页Acta Scientiae Circumstantiae

基　　金：浙江省“三农九方”科技协作计划项目(No.2024SNJF064);浙江省教育厅一般科研项目(No.Y202250166);浙江工商大学“数字+”项目(No.SZJ2022B014)。

摘　　要：水中卤代有机物因其较大毒性和较高稳定性,从而对生态环境与公共健康产生威胁.现有主要的氧化等方法仍然面临脱卤效率偏低、卤代副产物毒性增加等技术挑战.本研究选择了11种典型卤代苯酚为目标物,分析其在Na_(2)SO_(3)/UV还原体系中的还原降解动力学与脱卤效率,解析了卤代酚结构中卤素种类、取代位置、卤化程度等官能团的影响规律,并揭示了构效关系.结果表明:在Na_(2)SO_(3)/UV还原体系中,卤代苯酚的直接紫外光解和脱卤效率较高;由于水合电子(eaq-)的作用,部分卤代苯酚的还原降解与脱卤效率显著提高;溴酚和碘酚的直接光解与还原降解效率高于氯酚;卤化程度增加可促进其光解与脱卤;卤素取代位置具有一定的影响(para->ortho->meta-).研究结果可为卤代芳香有机污染物的高效深度去除与安全脱卤提供理论基础与方法参考.Halogenated organic compounds threaten ecological environment and public health due to their high toxicity and stability.The current technology such as oxidation processes is still challenged by the low efficiency in dehalogenation and the resulting risks of highly toxic intermediates.Through selecting eleven halophenols as target compounds,this study investigated the reductive degradation kinetics and dehalogenation efficiency in the sulfite/UV process,and revealed the dependence on molecular structure,including halogen type,substitution position,and halogenation degree.The results indicated that halophenols underwent fast direct photolysis under UV irradiation,and the removal kinetics and dehalogenation efficiency could be significantly enhanced by the powerfully reducing species in the sulfite/UV process,depending on the structure of halophenols.Bromophenols and iodophenol showed higher reduction efficiency than chlorophenols.The halogen substitution positions influenced the removal kinetics and dehalogenation efficiency following the descending order of para->ortho->meta-,and higher halogenation degree also favored the removal kinetics and dehalogenation in the process.This study gives insight into the reductive degradation of halogenated organics,and thus provides a novel technique for safe removal of refractory and toxic pollutants.

关 键 词：卤代苯酚 紫外光解 亚硫酸钠/紫外 脱卤 

分 类 号：X703[环境科学与工程—环境工程]