O-3-H-2O-2降解阿特拉津影响因素研究(1)

第2卷�第3期环境工程学报Vol.2,No.32008年3月ChineseJournalofEnvironmentalEngineeringMar.2008O3/H2O2降解阿特拉津影响因素研究李绍峰1�梁�媛2�张荣全3�李�平1�叶�非2(1.深圳职业技术学院建筑与环境工程系,深圳518055;2.东北农业大学理学院,哈尔滨150030;3.山东省农药检定所,济南250100)摘�要�采用O3/H2O2氧化去除水中内分泌干扰物阿特拉津,考察了反应条件及水质对去除的影响,并对反应机制进行了初步探讨。阿特拉津初始浓度2mg/L,投量为7�5mg/L的O3单独氧化去除率为27�2%;相同O3投量下,控制H2O2/O3摩尔比为0�75,5min阿特拉津的去除率最高可达96�5%;pH值为7�5~8�5,温度在25~40�的范围内,都维持了较高的去除率,表明H2O2/O3体系对阿特拉津的去除效果良好,降解速度快,反应条件温和。0�5mg/L的腐殖酸,对阿特拉津的去除影响不大,腐殖酸浓度为1、2和5mg/L时,平均去除率分别为63�4%、50�7%和30�2%;碳酸氢钠的浓度为50和200mg/L时,去除率分别为88�1%和73�8%,说明水质对阿特拉津的去除影响较大。叔丁醇的浓度为5和20mg/L时,阿特拉津的去除率分别降低到44�7%和27�5%,去除率随自由基抑制剂叔丁醇增加而降低,说明H2O2/O3降解阿特拉津主要为该体系产生的羟基自由基的贡献。关键词�内分泌干扰物�阿特拉津�高级氧化�臭氧�过氧化氢中图分类号�X703�1��文献标识码�A��文章编号�1673�9108(2008)03�0358�04ImpactsofreactivefactorsonatrazinedegradationbyO3/H2O2LiShaofeng1�LiangYuan2�ZhangRongquan3�LiPing1�YeFei2(1.DepartmentofBuilding&EnvironmentalEngineering,ShenzhenPolytechnicInstitute,Shenzhen518055;2.CollegeofScience,NortheastAgricultureUniversity,Harbin150030;3.InstituteofShandongAgrochemicalsContro,lJinan250100)Abstract�Theimpactsofreactiveinfluencingfactorsandwaterqualityonthedegradationoftherepresent�ativeendocrinedisrupteratrazinebyO3/H2O2werestudiedandthereactivemechanismwasdiscussedbrieflyinthispaper.Theinitialcontentofatrazine2mg/Lwasremovedabout96�5%in5minbyO3/H2O2systemwhentheO3wasdosedas2mg/LandtheH2O2/O3molarratioswas0.75,whereastheremovalefficiencywasjust27�2%byO3alone.Theremovalefficiencywasmaintained90%abovewhenpHwas7�5~8�5andthetemper�aturewas25~40�,whichshowedatrazinecouldbeoxidzedeffectivelyandrapidlybyH2O2/O3systeminordi�naryreactivecondition.Theremovalofatrazinewasnotaffectedbylowcontentofhumicacid,buttheremovalefficiencywerecutdownto63�4%,50�7%and30�2%whenthehumicaciddoseswere1mg/L,2mg/Land5mg/L.Simultaneously,theremovalefficiencywere88�1%and73�8%whenthecontentsofhydrogencarbon�atesodiumwere50mg/Land200mg/L.Boththeseindicatedtheremovalefficiencywasinfluencedgreatlybywaterquality.Whenthecontentsoftert�butylalcoholwere5mg/Land20mg/L,theremovaleff