化学氧化技术在地下水修复中的应用

910Vol．9No．10201510ChineseJournalofEnvironmentalEngineeringOct．2015213125。Fenton、、4、pHOＲP。Fenton80%pH60%。pH。4OＲP。X703A1673-9108201510-4910-05ChemicaloxidationforgroundwaterremediationYinZhenLiaoShulinMaQiangZhangJinfengLiYuezhongWangQingguoJiangsuWELLEEnvironmentalCo．LtdChangzhou213125ChinaAbstractChemicaloxidationasaremediationtechnologyforgroundwaterpollutionhasattractedgreatat-tentioninrecentyears．FourextensivelyusedoxidantsFentonreagentactivatedsodiumpersulfatepotassiumpermanganateandsodiumhypochloritewereinvestigatedfortheiractivitiesintheremovaloforganicpollutantsandtheireffectsonthepHandredoxpotentialOＲPofgroundwaterwhichwascontaminatedwithpesticides．TheresultsshowedthatthehighestremovalefficiencyoforganicsoccurredinthetreatmentswithFentonreagentandactivatedsodiumpersulfate．Morethan80%ofpollutantscanbeeffectivelyremovedaftertreatmentofthesetwooxidants．MeanwhilethepHofgroundwaterdecreasedtosomeextentwhencomparedwiththatofpretreat-ment．Asforthetreatmentswithpotassiumpermanganateandsodiumhypochloriteonly60%ofpollutantscanberemovedbutnoeffectonthepHofgroundwaterwasobservedinthetreatmentwithpotassiumpermanganate．Howeversodiumhypochloriteshowedlowactivityforbromobenzeneremovalandevennoactivityforchlorinetolueneremoval．Furthermorethetreatmentwithsodiumhypochloritecouldmakethegroundwaterbecomestronglyalkaline．TheOＲPofgroundwaterincreasedimmediatelywhenanyofthefouroxidizerswasadded．Keywordsgroundwaterorganicpollutionchemicaloxidationremediation2014－07－032014－10－071987—。[e-mail]12。。34。5。、67。89。1011。Fenton、、4pHOＲP。1011.14℃pH7.41OＲP230mVCOD700mg/L29700μg/L410μg/L5230μg/L108μg/L165μg/L51μg/L563μg/L38000μg/L192μg/L。1.28421。1LFenton、、48h。pHOＲP。48h。1Table1ListoftreatmentsFenton1H2O2FeSO4·7H2O30%0.5mol/L0.08mol/L0.008mol/LFenton2H2O2FeSO4·7H2O30%0.5mol/L0.16mol/L0.016mol/L1FeSO4·7H2O0.5mol/L0.5mol/L0.017mol/L0.0073mol/L2FeSO4·7H2O0.5mol/L0.5mol/L0.034mol/L0.0146mol/L10.2mol/L0.025mol/L20.2mol/L0.05mol/L14.2%0.084%24.2%0.168%1.31L50g60mL310mL1mL。P＆T-GC/MS7890A-5975CGC-MS12。50℃2min25℃/min265℃6℃/min285℃10℃/min320℃2min。45℃1min30℃/min150℃50℃/min220℃1.5min。EI230℃。22.142。14。Fenton95%、、、、、100%99%GallardH.13Fenton。FentonFe2+H2O2·OH。80%80%～85%85%。0.034mol/L0.017mol/L。FentonSO－4·E=+2.6V·OHE=+2.8V14。、、100%、90%15。60%。21。、CC。100%60%119491Fig.1Ｒemovalratesofpollutantsusingdifferentoxidants。2。O。2.2pHpH。2pHpH2pHFig.2ChangesofpHduringprocessofchemicaloxidation2pH。pHpH。pHpH4.5～5S2O2－8SO－4·H+pH16。pH24hMnO2OH－pH。pHpH12～13pH11.5pHpH。pH17。219410pHpH。2.3OＲP3。Fenton450～600mV。OＲP。600mV。。3400～650mV。Fe2+、·OH、H2O2、Fe3+。OＲP。3OＲPFig.3ChangesofOＲPduringprocessofchemicaloxidation31Fenton。Fenton95%80%。pHOＲP。2、、100%60%。100%。2。34Fenton＞＞＞。Fenton。1.Ⅱ-.20062231-8TangKewangWuYuchengHouJie.AssessmentofgroundwaterqualityinChinaⅡ.Groundwaterqualityandpollutionanalysis.WaterＲesourcesProtection20062231-8inChinese2..20071517-18SunXuetao.Thinkingandmeasuresforstrengtheninggroundwatermanagement.ChinaWaterＲesources20071517-18inChinese3..20133372004-2011WangLiminJiangYonghaiZhangJinbaoetal.Healthriskassessmentoforganochlorinepesticidepollutioninsoilandgroundwaterofatypicalagriculturalactivearea.ActaScientiaeCircumstantiae20133372004-2011inChinese4..201430276-79HeXiaominShiMinfangLiAiminetal.Healthriskas-sessmentoforganophosphoruspesticidescontaminatedsoilandgroundwaterinanabandonedfactorysite.Environmen-talMonitoringinChina201430276-79inChinese5.31949.2009293474-481XueYuqunZhangYoukuan.TwofoldsignificanceofgroundwaterpollutionpreventioninChina’swaterpollu-tioncontrol.ActaScientiaeCircumstantiae2009293474-481inChinese6AnYongleiZhangLanyingLiuNaetal.Fieldscalea-nalysisonstructuralchangesofmicrobialcommunityanditsrelationshipswithenvironmentalfactorsinnitrobenzene-contaminatedgroundwaterduringairspargingremediation.EnvironmentalEngineeringandManagementJournal20121191687-16967PhillipsD.H.VanNootenT.BastiaensL.etal.Tenyearperformanceevaluationofafield-scalezero-valentironpermeablereactivebarrierinstalledtoremediatetrichlo-roethenecontaminatedgroundwater.EnvironmentalScience＆Technology201044103861-38698.-Fenton.201044809-812ＲenBaixiang.Ｒesearchondegradationofdyeindustrywastewaterbyultrasonic-Fentonprocess.ChineseJournalofEn-vironmentalEngineering201044809-812inChinese9..201332154-64YangBinYingGuangguoZhaoJianliangetal.Ｒe-searchprogressontheoxidationofemergingorganiccon-taminantsbyferrateⅥ.EnvironmentalChemistry201332154-64inChinese10..2011323857-863ZhaoDanLiaoXiaoyongYanXiulanetal.Chemicaloxidantsforremediationofsoilscontaminatedwithpolycy-clicaromatichydrocarbonsatacokingsite.EnvironmentalScience2011323857-863inChinese11.-12-.2014841434-1437LiMengjiaoLiuFeiChenHonghanetal.Ｒemovalof12-dichloroethaneingroundwaterwithsiderite-catalyzedhydrogenperoxideandpersulfatesystem.ChineseJournalofEnvironmentalEngineering2014841434-1437inChinese12.GC/MS.2006WangYufan．MethodofGC/MSdevelopedforsurveyonorganiccontaminatantaingroundwater．BeijingDoctorDissertationofChinaUniversityofGeosciences2006inChinese13GallardH.DeLaatJ.Kineticsofoxidationofchloroben-zenesandphenyl-ur