二氧化钛粉体在纸厂废水处理中的应用

应用与发展解恒参1,朱亦仁2,李爱梅2,鲁玲2(1.,221008;2.,221116):为了获得活性更高的催化剂来处理纸厂废水,本实验利用溶胶-凝胶法制备了TiO2粉体,并对其进行了表征,最后将其应用于光催化氧化处理纸厂废水.实验结果表明,此粉体为锐钛型纳米颗粒;应用其作催化剂处理造纸废水可使废水COD和浊度的去除率分别达94%和97%,处理后废水达到排放标准,也使废水的色度得到很大程度的去除.:溶胶-凝胶法;表征;纳米颗粒;二氧化钛;光催化;造纸废水:1000-3231(2006)04-0312-06:O64:A,..,.80,,,CO2H2O..,[1].TiO2,,[2-7].,[8,9],,.[10],,,,.So-lGelTiO2,,XRDTEMUV-VI:2005-09-11;:2006-05-10.:;.:(1970-),,,,;,:0516-83889085,E-mail:[e-mail].312244Vol.24No.420067PhotographicScienceandPhotochemistryJuly,2006.,,.11.1:(Ti(OC4H9)4,CP),((CH3)2CHOH,AR.),(HCl,AR.),(H2SO4,AR.),NaOH(AR.),FeSO4((NH4)2SO46H2O,AR.),K2Cr2O7(AR.),H2O2(AR.),(TiO2,AR.).:SGY-1(),PHS-3pH(),ZD-1(),TEM-100SX(),DX-1000(),TU-1201-().1.2TiO2[7],TiO2,200.1.3TiO2,10.0mL(1mol/LH2SO4pH)30%H2O2,,,.,,COD,CODE.22.12.1.1X(XRD)TiO2(,ARDegissaP-25)XRD,12.,So-lGel.-(Debye-Scherrer):D=/cos(D,015418nm,,,0.89),17.91nm35.01nm,.JCPDSPDF21-1272,.2.1.2(TEM),.,3.3,()20nm.X,4:3135506h.1TiO2XRDXRDspectraofhomemadeTiO22TiO2XRDXRDspectraofcommercialTiO22.1.3-(UV-VIS),TiO2-max436518nm,TiO2-max250260nm.TiO2.2.22.2.1COD:1molL-1H2SO4pH=10.0,10mL,TiO2(550,6h)30%H2O22%,300W3hCOD,E%.,4.3TEM(550,6h)TEMphotographofhomemadeTiO2(550,6h)4ComparisonofhomemadeTiO2amountwithcommercialTiO24,CODCOD;,TiO21gL-1,TiO23gL-1.,,,;,,,,,.2.2.231424:1molL-1H2SO4pH10.0,10mL,TiO20.01gH2O2,300W3h,COD,E%.,2%,5.5CODEffectofthedosageofH2O2onremovalrateofCOD6pHCODEffectofpHvalueonremovalrateofCODH2O2,OH,OH,OHOH.H2O2,.,H2O2OH,HO2,OH,.,COD,H2O2,COD.2.2.3pH:1molL-1H2SO4pH212,TiO20.01g,H2O2(30%)2%,300W3h.COD,E%.,pH4.0,COD86.71%,6.TiO2,pH,-pH,pH,pH,.pH.2.2.4COD:1molL-1H2SO4pH4.0,TiO2TiO20.01g,H2O22%,10mL300W15h.COD,E%.COD,7.7,,COD.4h,,,COD4:315.,So-lGelTiO2TiO2,.7Comparativeexperimentsoftwokindsofcatalysts8Comparativeexperimentsofdifferentintensitylamp2.2.5,.500W300W(8).,500W,9hCOD3550mg/L200mg/L,.,84024.8,50010..31.So-lGelTiO2.5505hTiO220nm.2.So-lGel,TiO20.01gH2O2(30%)2%pH4.0500W9h,COD94%,CODCr=200mg/L,(CODCr400mg/L.GB3544-2001,2001-11-12,2002-01-01),97%98%.3.,.,,.:[1],.[M].:,2001.88-93,135-138,147-148,259-266.ZhangLD,MouJM.Nanometermaterialandnanometerstructure[M].Beijing:SciencePress,2001.88-93,135-138,147-148,259-266.[2]FrankSN,BardAJ.Semiconductorelectrodes.12.Photoassistedoxidationsandphotoelectrosynthesisatpolycrys-tallineTiO2electrodes[J].J.Am.Chem.Soc.,1977,99(14):4667-4675.[3]LegriniO,OliverosE,BraunAM.Photochemicalprocessforwatertreatment[J].Chem.Rev.,1993,93:671-698.31624[4]BlakeDM.Bibliographyofworkonthephotocatalysticremovalofhazardouscompoundsfromwaterandair[J].Na-tionalRenewalEnergylaboratory,1994,(5):1-24.[5]HoffmannMN,MartinsST,ChoiW,etal.Environmentalapplicationofsemiconductorphotocatalysis[J].Chem.Rev.,1995,95(1):69-96.[6]BalciogluAI,InelY.PhotocatalyticdegradationoforganiccontaminantsinsemiconductorsuspensionswithaddedH2O2[J].Environ.Sci.Health.,1996,31(1):123-128.[7]FujishimaA,RaoTN,TrykDA.Titaniumdioxidephotocatalysis[J].JournalofPhotochemistryandPhotobiologyC:Photo-chemistryReviews,2000,(1):1-21.[8],,.[J].(),2001,29(5):68-71.XuYH,GuGB,LIXJ.Astudyoffactorsaffectingphotocatalyticdegradationofmethamidophos[J].JournalofSouthChinaUniversityofTechnology(NaturalScienceEdition),2001,29(5):68-71.[9],.UV/H2O2[J].,2001,52(3):277-280.WUZC,LIW.Treatmentofpheno-lcontainingwastewaterusingUV/H2O2systems[J].JournalofChemicalIndus-tryandEngineering,2001,52(3):277-280.[10],,.TiO2[J].,2005,5(1):20-22.ZhuYR,XieHS,ZhangZC.Quickpaper-makingwastewatertreatmentbyTiO2photo-catalyzedoxidation[J].JournalofSafetyandEnvironment,2005,5(1):20-22.ApplicationofTiO2PowderinTreatingWastewaterfromPaper-MakingFactoryXIEHeng-shen1,ZHUY-iren2,LiA-imei2,LULing2(1SectorofBasicCourses,XuzhouInstituteofArchitectralTechnology,Xuzhou221008,Jiangsu,P.R.China;2DepartmentofChemistry,XuzhouNormalUniversity,Xuzhou221116,Jiangsu,P.R.China)Abstract:Toexploreanefficientmethodtodegradeorganiccontaminationinpaper-makingwaste-waterthisexperimentwasdesigned.Titaniumdioxidenano-crystalwerepreparedbySo-lGelmethodandcharacterizedwithUV-VisspectrumandX-raydiffraction.Theresultshowsthatthesampleisanatasenanometerspheregranule.Thesepowders,asphotocatalysts,wereusedtophoto-catalysisoxidationtreatpaper-makingwastewaterwithwheatstraw.Viaexperiment,weobtainedthebesttechnicscondition,inwhichdosageoftitaniapowderis001g/10mL,dosageofH2O2(30%)volumefractionis2%,pHvalueis405,illuminationintensiveis500W,theilluminationtimeis9hours,theremovalrateofCODCrreach94%,effluentliquidCODis200mg/L,whichmeetthedischargestandardofwaterpollutantsforpaperindustry,andturbiditydegree.Chro-maticityweredecreasedobviouslytoo.Keywords:So-lGelmethod;characterization;nanometerparticle;TiO2;photo-catalytic;paper-makingwastewaterCorrespondingauthor:XIEHeng-shen4:317