光催化氧化法处理腐殖酸溶液的实验研究朱爱梅

37520095　　　　　　　　　　　　　　　CHEMICALENGINEERING(CHINA)　　　　　　　　　　　　　Vol.37No.5May2009:(0000X071C1):(1975—),,,,E-mail:[e-mail]。朱爱梅,李　培,张秋根,刘庆林(,　361005):,TiO2。、pH、。:TiO2pH;pH、,。,。:;;TiO2;:X703;O625　　　:A　　　:1005-9954(2009)05-0062-04ExperimentalstudiesontreatinghumidacidsolutionbyphotocatalyticoxidationZHUAi-mei,LIPei,ZHANGQiu-gen,LIUQing-lin(CollegeofChemistryandChemicalEngineering,XiamenUniversity,Xiamen361005,FujianProvince,China)Abstract:Humidacid(HA)istherepresentationoforganicmatterinwastewater.ThebehaviorsofadsorptionandphotocatalyticoxidationofHAinwateronTiO2particleswerestudied.TheeffectsofdifferentfactorsonremovalofHAfromwaterwereinvestigated,suchasmassconcentrationofcatalyst,initialvalueofpH,initialmassconcentrationofHA,etc.TheresultsshowthattheadsorptionamountofHAinbalanceonTiO2particlesisindependentofinitialpHvalueofthesolution.TheremovalefficiencyofHAisimprovedgreatlywiththedecreasingofinitialpHvalueandinitialmassconcentrationofHA.Comparingtheremovalefficiencyofphotocatalyticoxidationwiththatofultravioletradiationalone,thephotocatalyticoxidationisbetterthanultravioletradiationalone.Keywords:photocatalyticoxidation;humicacid;TiO2;adsorption　　,。()、、、。,(HA)、[1],、、[2]。,HA,。,,。TiO2。HA,。,HA、[3-5],[6]。TiO2HA、HA。1　1.1　HA,;(HCl),;(NaOH),;TiO2,,60nm;。,。pH,HANNAPH211,;-,ThermoUNICAMUV300,。1.2　1。1　Fig.1　Experimentalset-up　　,125W。。,,HATiO2,。,,HA。1.3　HAHA0.025mol/L,HA,4℃。,HA,,HClNaOHpH。1.4　HA。,HA254nm1,-UV254,HA。2　2.1　pHHAHA20mg/L250mL(),pH,TiO2。(200r/min),,0.45μmMilliporeHA。pHTiO2HA,2。2　pHHAFig.2　EffectofinitialpHvaluesonadsorptionofHA　　:0.5h,TiO2HA,HATiO2;TiO2HA,,pH。pHTiO2。pHHA。,,pH,30min,。2.2　HA,HA3。3　HAρ(TiO2)Fig.3　RelationshipofremovalefficiencyofHAandρ(TiO2)　　3,,TiO2,,。TiO22.0g/L,HA,20min70%。·63·朱爱梅等　30min,TiO21.5g/L2.0g/L,HA90%,0,。,,TiO21.5g/L。,,。Wang[7]4-,TiO202.0g/L,02×105m/s,。[8],TiO210g/L。,TiO2,。:①,,TiO2,,;②,TiO2,,,·OH,。2.3　HA、,HA,HA,4。4　HAFig.4　RemovalefficiencyofHAatdifferentinitialmassconcentration　　4,30min,,HA;90min,HA,0,。HA·OH,HA·OH。,,,,,。,,,HApH,,pH。2.4　pHHApHHA5。5　pHHAFig.5　RemovalefficiencyofHAatdifferentinitialpHvalues　　,,pHHA,pHHA。pH2.5,4.5,6.5,8.5,。5,10min,、、HA,30%,,,,。,30min90%,0,。,HApH。,HApH,,HA。,HA。pH,HA,pHTiO2。pH,HA,TiO2。,,pHHCO-3,CO2-3,·OH、,O-2·,。2.5　HA,HA,6。·64·　20093756　HAFig.6　RemovalefficiencyofHAunderdifferentconditions　　HA,,30min,50%,95%,0,。,。3　(1)pH,30min,HATiO2,pH。(2)HA,、pH、。pH、HAHA;,HA。(3),HA。:[1]　WEIYan,ZYDNEYAL.Humidacidfoulingduringmi-crofiltration[J].JournalofMembraneScience,1999,157(1):1-12.[2]　STEPNOWSKIP,SIEDLECKAE,BEHRENDP,etal.Enhancedphoto-degradationofcontaminantsinpetroleumrefinerywastewater[J].WaterResearch,2002,36(9):2167-2172.[3]　,,,.[J].,2001,34(2):44-47.[4]　HUSEYINS,JEOSADAQUEJS,MARCAA.Photo-electrocatalytichumicaciddegradationkineticsandeffectofpH,appliedpotentialandinorganicions[J].JournalofChemicalTechnologyandBiotechnology,2003,78(9):979-984.[5]　KUYong,HSIEHChingbin.Photocatalyticdecomposi-tionof2,4-dichlorophenolinaqueousTiO2suspensions[J].WaterResarch,1992,26(11):1451-1456.[6]　,.TiO2[J].,2001,18(11),912-914.[7]　WANGChen,LIJun,MELEG,etal.Efficientdegrada-tionof4-nitrophenolbyusingfunctionalizedporphyrin-TiO2photocatalystsundervisibleirradiation[J].AppliedCatalysisB:Environmental,2007,76(3/4):218-226.[8]　,,.[J].,1999,15(5):52-54.　◇(2008):150/;　◇(2008):150/;　◇(2007):150/;　◇(2006):120/;　◇(2005):100/;　◇:50/;　◇:50/。　　注:1.均免邮费;2.如原价订各版《通鉴》,均可获赠名片广告。:(310012)5-3-602　　　:·:0571-88785188、13735823588　:·65·朱爱梅等