水中有机物对紫外光催化还原溴酸盐的影响  

Influencing of aquatic organic matters on UV photocatalytic reduction efficiency of bromate

作　　者：胡航恺 徐浩丹 卢晓辉 王立章[3] 马军 宋爽 汪达 HU Hang-kai;XU Hao-dan;LU Xiao-hui;WANG Li-zhang;MA Jun;SONG Shuang;WANG Da(Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province,College of Environment,Zhejiang University of Technology,Hangzhou 310032,China;State Key Laboratory of Urban Water Resource and Environment,School of Environment,Harbin Institute of Technology,Harbin 150090,China;School of Environment Science and Spatial Informatics,China University of Mining and Technology,Xuzhou 221116,China)

机构地区：[1]浙江工业大学环境学院,浙江省工业污染微生物控制技术重点实验室,浙江杭州310032 [2]哈尔滨工业大学环境学院,城市水资源与水环境国家重点实验室,黑龙江哈尔滨150006 [3]中国矿业大学环境与测绘学院,江苏徐州221116

出　　处：《中国环境科学》2022年第3期1164-1172,共9页China Environmental Science

基　　金：国家自然科学基金资助项目(22076168,52000158);浙江省自然科学基金青年基金资助项目(LQ21E080011);第69批中国博士后科学基金面上资助项目(2021M693414)。

摘　　要：通过一步水热法制备了TiO_(2)与TiOF_(2)用于考察不同水质条件下紫外光催化控制还原BrO_(3)^(−)的效率.结果表明,TiO_(2)在纯水中还原BrO_(3)^(−)的效率(120min还原78.5%)显著高于TiOF_(2)(120min还原57.0%).但当体系中存在难降解有机物(莠去津)或天然有机物(腐殖酸)时,TiOF_(2)还原BrO_(3)^(−)的效率则优于TiO_(2).TiOF_(2)尤其在20μmol/L莠去津和20μmol/L BrO_(3)^(−)共存条件下展现了良好的同步降解莠去津和还原BrO_(3)^(−)的特性,在反应120min后,莠去津的降解率和BrO_(3)^(−)的还原率分别达到了48.5%和99.0%.此外,TiOF_(2)比TiO_(2)表现出更强的抗水中有机物干扰的能力.当溶液中腐殖酸浓度为5mg/L时,TiO_(2)和TiOF_(2)体系中BrO_(3)^(−)的还原率分别为13.8%和29.8%,后者表现出更为稳定的BrO_(3)^(−)还原效率.在紫外光深度净水体系中,TiOF_(2)具有更强抗水质干扰能力,更能适应水质条件变化带来的影响.TiO_(2) and TiOF_(2) were prepared by a one-step hydrothermal method and their efficiencies of BrO_(3)^(−)reduction under UV photocatalysis were investigated in water matrix.In pure water,78.5%of BrO_(3)^(−)was reduced by UV/TiO_(2) after 120min,which was significantly higher than that on UV/TiOF_(2)(57.0%).While in water contained refractory organic pollutant(atrazine,ATZ)or natural organic matter(humic acid,HA),the results were opposite to those in pure water.UV/TiOF_(2) achieved superior simultaneous ATZ degradation and BrO_(3)^(−)reduction when refractory organic pollutant co-existed with BrO_(3)^(−).The ATZ degradation and BrO_(3)^(−)reduction rates reached 48.5%and 99.0%after 120min when 20μmol/L ATZ and 20μmol/L BrO_(3)^(−)co-existed in the solution.The BrO_(3)^(−)reduction efficiencies of UV/TiO_(2) and UV/TiOF_(2)were 13.8%and 29.8%when 5mg/L of HA was added into the solution,demonstrating that compared with UV/TiO_(2),UV/TiOF_(2) revealed robust BrO_(3)^(−)reduction ability in the complex water constituents.TiOF_(2) presented stronger resistance to water matrix applied in UV photocatalytic advanced water purification system.

关 键 词：UV光催化 溴酸盐控制 TiOF_(2) 难降解有机物 天然有机物 

分 类 号：X703.5[环境科学与工程—环境工程]