负载型二氧化铈催化氧化对滤后水THMsFP的影响

42820108JOURNALOFHARBININ[e-mail]57.0%．CeO2TOC．Br－、THMsFP．CeO2THMsFP．0.7mg·L－1CeO2THMsFP64.9%．X703.1A0367－6234201008－1323－05EffectofcatalyticozonationwithsupportedceriumoxideonTHMsformationpotentialoffilteredsurfacewaterLUJin-feng1MAJun2QIANMin-lei1ZHAIXue-dong21．CollegeofEnvironmental[e-mail]ronmentalEngineeringHarbinInstituteofTechnologyHarbin150090ChinaAbstractThisworkinvestigatedthetrihalomathenesformationpotentialTHMsFPoffilteredsurfacewateraftercatalyticozonationinthepresenceofceriumoxidesupportedonaluminaCeO2/Al2O3/O3inacontinu-ousflowreactor．CeO2/Al2O3/O3oxidationcausedareductionofTHMsFPofthefilteredwaterby57.0%comparedwithozonationalone．ItisrelatedtothehigherTOCremovalandmorehalogenreactivesitesde-structionduringcatalyticozonationwithsupportedCeO2．ThebromideconcentrationcontacttimeandozoneconcentrationwerefurtherstudiedduringCeO2/Al2O3/O3oxidation．Thecatalyticozonationshowedasignifi-cantadvantageoverozonationincontrollingTHMsFPofthewateratconditionsappliedinthisexperiment．Infactlowozonedosageof0.7mg·L－1inthecatalyticozonationcanbringaboutareductionofTHMsFPofthefilteredwaterby64.9%comparedwithozonationalone．Keywordscatalyticozonationceriumoxidesupportedtrihalomathenesformationpotentialcontinuousflow2009－10－03．10JCYBJC035002009ZX07424－00665010371．1980—1962—．、．1－2．NOM．NOMDBPsTHMsTHMsFP．FeOOH、CeO2THMsTHMsFPTHMsFP3．THMsTHMsFP．CeO2THMs3．CeO2THMsFPTHMsFP．11.13．、、．1μm1．Br－THMsKBr．1．1TOCmg·L－1UV254cm－1SUVAL·m·mg－1CaCO3mg·L－1NTUpHρBr－mg·L－1℃3.12～4.270.071～0.0852.28～1.9976.50.4－0.67.6～8.0＜0.0517～18213410765108592%KI1.氧气瓶；2.臭氧发生器；3.滤后水；4.蠕动泵；5.阀门；6.砂芯曝气板；7.单独臭氧反应柱；8.催化氧化反应柱；9.尾气吸收装置；10.出水口.1G－3．Al2O3．．XFZ－58I．O3——5h．KI．0.5135h．O3KI．1.2pH=1～2Al2O324h500℃2h．X－CeO2．1.3THMsFPAWWAStandardMethod1992．1μm200mL20mg·L－125℃48hMTBESigma－Aldrich．THMsUSEPAMethod551.1．Agilent6890ECDDB－530m×0.25mm．TOCTOCVPHTOCBr－Dionex4500iIONPACAS4－SCcNaHCO3/NaCO3=1.7/1.8mmol·L－1v=1.0mL/min．20.5135h44THMsFP0.5135h4THMsFP．2.1THMsFPO3Al2O3CeO2CeO2/Al2O3/O3THMsFPCeO2/Al2O3/O3O32．CeO2/Al2O3/O3THMsFP32.1%O357.03%．CeO2/Al2O3/O3CHCl3、CHCl2Br、CHClBr2CH-·4231·42Br341.7%63.3%49.0%67.6%．CeO2THMsFP1．CHCl3CHClBr2CHCl2BrCHBr3400350300250200150100500滤后水O3CeO2/Al2O3/O3THMsFP/(滋g·L-1)［Ｏ３］＝３.５０±0.25mg·L-1;［Br-］0=2mg·L-1;停留时间9.8min;t=18℃.2THMsFP、CeO2TOC2．TOC8.73%～12.7%CeO257.67%～60.58%TOC．THMsFPTOC．4TOC．CeO2/Al2O3/O3THMsFPTOCCeO2TOCCeO2TOC20.37%～28.57%．CeO2TOCO3．CeO2．CeO2“”CeO2CeIVLewis．CeO2．CeIVO—C56．NOM、CeO2CeO2THMsFP．CeO2/Al2O3/O3TOCTHMsFPCeO2/Al2O3/O3THMsFPTOC．CeO2TOCTHMsFPCeO2NOM、NOMTHMsFP．2、TOCO3TOC/mg·L－1TOC/%CeO2/Al2O3/O3TOC/mg·L－1TOC/%CeO2/Al2O3TOC/mg·L－1TOC/%0.5h3.458.731.4960.582.7028.571h3.3810.561.5858.202.8923.543h3.3012.701.5359.522.8025.935h3.419.791.6057.673.0120.373.3910.321.5558.992.8524.60TOC=3.78mg·L－14TOC．2.2THMsFPBr－、7．Br－THMsFPKBr500℃2hBr－01.02.03.0mg·L－1．4THMsFPBr－3．Br－CHCl3THMsBr－2～3mg·L－1Br－8．Br－CeO2/Al2O3/O3THMsFPCHCl3CHBrCl2Br－Br－=1mg·L－1CHBrCl2CHBr2ClCHBr3Br－CHBr3CHBr2Cl．0～3mg·L－1Br－CeO24THMsFP·5231·8THMsFP．Br－CeO2THMsFP．Br－CeO2CHCl370.4%O3Br－CeO2THMsBr－=3.0mg·L－1CHBrCl2、CHBr2Cl、CHBr377.3%59.3%57.0%．Br－CeO2/Al2O3/O3THMsFP．单独臭氧CHCl3FP催化氧化CHCl3FP单独臭氧CHCl2BrFP催化氧化CHCl2BrFP单独氧化CHClBr2FP催化氧化CHClBr2FP单独氧化CHBr3FP催化氧化CHBr3FP2502001501005000.51.01.52.02.53.03.5籽(Br-)/(mg·L-1)籽/(滋g·L-1)O3=3．50±0．25mg/L9．8mint=18℃．3THMsFP2.3THMsFPTHMsFP4．THMsFP．NOM、THMs9．5.6minTHMsFPTHMsFP．CeO2/Al2O3/O3CeO2CeIVLewisCeO2/Al2O3/O3、THMsFP．2.4THMsFP3O3CeO2THMsFP5．O3CeO2/Al2O3/O34504003503002502001501005003.95.69.8停留时间/minTHMsFP/(滋g·L-1)［O3］=3.50±0.25mg·L-1;［Ｂr-］0=2mg·L-1；t=18℃.4THMsFPO3CeO2THMsFPO3=3.5mg·L－1mO3/mTOC0.93CeO2THMsFP．O3NOMTHMs9．mO3/mTOC≈1O310．THMsFPO3=3.5mg·L－1mO3/mTOC0.93mO3/mTOC≈1．O3O3THMsFP．O3O3THMsFP．O3CeO24THMs5．O3CHBr2ClO33.5mg·L－15mg·L－1CHBr3THMs．O32～5mg·L－1CHBr311．CeO2O3CHBr3O3CeO2CHBr2Cl73.2%CHBr2ClTHMs．3O3CeO2/Al2O3/O3THMsFP．O3=0.7mg·L－1·6231·42CeO2THMsFPTHMsFP64.9%．O35mg·L－1THMsFP．O3＜1mg·L－1CeO2/Al2O3/O3THMsFP．CHCl3CHClBr2CHCl2BrCHBr3350300250200150100500.73.55.0籽(O3)/(mg·L-1)(a)臭氧氧化THMsFP/(滋g·L-1)CHCl3CHClBr2CHCl2BrCHBr33503002502001501005000.73.55.0籽(O3)/(mg·L-1)THMsFP/(滋g·L-1)［Br-］0=2mg·L-1;停留时间9.8min;t=18℃.(b)CeO2催化臭氧氧化5CeO24THMs31CeO2/Al2O3/O3THMsFPTOCTHMsFP．2Br－0～3mg·L－1Br－CeO2/Al2O3/O3THMsFPO3．Br－Br－CeO2/Al2O3/O3THMsFP．3THMsFPTHMsTHMsFP．4O3=0.7～5.0mg·L－1CeO2THMsTHMsFP．O3CeO2THMsFPCeO2/Al2O3/O3O3．1ORMADMPMIQUELNLANAOMetal．Effectofapplicationofozoneandozonecombinedwithhydrogenperoxideandtitaniumdioxideintheremovalofpesti-cidesfromwaterJ．OzoneSciEng201032125－32．2ZHAOLMAJSUNZetal．Mechanismofheteroge-neouscatalyticozonationofnitrobenzeneinaqueousso-lutionwithmodifiedceramichoneycombJ．AppliedCatalysisBEnvironmental2009893/4326－334．3ZHANGTMAJLUJetal．CatalyticozonationwithmetaloxidesAnoptiontocontrolTHMsformationpo-tentialJ．WaterSciTechnolWaterSupply20066363－70．4ZHANGTLUJMAJetal．Fluorescencespectro-scopiccharacterizationofDOMfractionsisolatedfromafilte