TiO2光催化氧化焦化废水的研究黄永兰1,左志芳1,王风云2,夏明珠2,雷 武2*1.扬州工业职业技术学院应用化学系,江苏扬州225127;2.南京理工大学工业化学研究所,江苏南京210097:TiO2,,TiO2、、、pHH2O2COD,。:TiO2CODCr,:TiO20.8gL-1,0.25m3h-1,1.5h,pH=10,H2O20.3。:TiO2;;:X784 :A :1002-1116(2007)02-0050-04 20,70。1972,FujishimaHonda,1976S.N.Frank,,-[1]。,TiO2、、、[2,3],。、,,,、、,、、、、、(PAHs)。,,,,。,[4],,[5~7],,。1 1.1 TiO2,(、);、、。COD;721;,,1。1—;2—;3—;4—;5—;6—1 ,30cm×8cm×7cm,1000mL。120mm,300W,5cm。,,。1.2 ,:,pH7.77,CODCr=3647.0mgL-1。1.3 ,1000mL,TiO2,,,,10min,,35220074 JiangsuChemicalIndustry Vo.l35No.2 Apr.2007*:2006-12-12:(1981—),,,,:。E-mail:huangyl@yzci.tcn。,,,,。1.4 1.4.1 CODCr值的测定,CODCr:CODCr=CODCr0-CODCrtCODCr0×100%CODCr0CODCrt,tCODCr。1.4.2 色度的测定,-,360nm,,λ=360nm[8],UV360,:UV360=A0-AA0×100%:A。———360nm;A———360nm。2 2.1 TiO2,-(e-h),,,OH,OH、、O2-,CO2H2O[9,10]。Q=0.1m3h-1,t=1.5h,pH=7.76,TiO2(),2。2 TiO2COD 2,m(TiO2)=0.8g,COD16.8%,TiO2,。TiO2,h+,OH;TiO2,,;TiO2,,,。2.2 m(TiO2)=0.8g,t=1.5h,pH=7.76,,COD,1。1,Q=0.25m3h-1,COD22.00%。,O2,,O2,,OH[11],。,(),。1 COD/(m3h-1)0.150.200.250.300.35COD/%17.8617.7022.0017.2917.142.3 ,m(TiO2)=0.8g,Q=0.25m3h-1,pH=7.76,,2。2,,COD,。:,CO2、H2O,1.5h,1.5h。2 COD/h0.51.01.52.02.5COD/%15.2613.9821.9920.9721.692.4 pHpH,pHTiO2,,[12]。m(TiO2)=0.8g,Q=0.25m3h-1,t=1.5h,pH,3。3,pH6,CODpH51351 :TiO2,pH6,CODpH,pH10COD50.06%。TiO2pH6,pH6,,,;,,。,TiO2,,。pH6,,OH-,OH,[7]。3 pHCODpH13691011COD/%18.6115.605.5837.6350.0651.232.5 (H2O2)H2O2,-,-,[13]。m=0.8g,Q=0.25m3h-1,t=1.5h,pH7.76,H2O2,3。3 H2O2 3,H2O2,COD,H2O20.3,,COD64.41%,,。H2O2,-,OH,。H2O2OHO2-OH,。H2O2,TiO2,,。H2O2OH,OH(HO2-),,。,。2.6 TiO2TiO2,,COD69.96%,,,。,。,[14,15]。3 ,(TiO2),COD,:TiO20.8gL-1;Q=0.25m3h-1;t=1.5h;pH=10;H2O20.3。。,TiO2,,,,,,TiO2,,。:[1] ,,,.[J].,2004,14(2):19-22.[2] ,,.[J].,2002,28(6):37-40.[3] DionysiouDD,KhodadoustAP,KernAM,eta.lContin-uous-modephotocatalyticdegradationofchlorinatedandpesticidesinwaterusingabench-scalTiO2rotatingdiskreactor[J].AppliedCatalysisB:Envionmental,2000,24:139-155.[4] ,.[J].,2003(2):1-3.[5] NingPing,BartHans-Jorg,JiangYijiao,eta.lTreatmentoforgaicpollutantsincokeplantwastewaterbythemeth-odofultrasonicirradiation,catalyticoxidationandactiva-tedsludge[J].SeparationandPurificationTechnology,2005,41:133-139.[6] TeramuraTT,YamamotoK,eta.lTiO2/SiO2photocata-lystsatlowlevelsofloading:preparation,struceandpho-tocatalysis[J].JournalofPhotochemistryandPhotobiolo-gyA:Chemistry,2002,148:277-281.52 20072[7] ,.TiO2[J].,2003,28(4):109-112.[8] ,,,.TiO2[J].,2003,25(11):56-57.[9] AkbalF,OnarAN.Photocatalyticdegradationofphenol[J].EnvironmentMonitoringandAssessment,2003,83:295-302.[10],.[M].:,2001:6.[11],,,.TiO2[J].,2001,22(4):278.[12],.[J].,2003,17(5):16-17.[13],.[J].,2004,23(1):75-77.[14],,.TiO2[J].,2004,27(2):94-97.[15],,,.TiO2[J].,2003,17(4):1-3.PhotocatalysisDegrationofCokingWasterwaterbyTOi2HUANGYong-lan,ZOUZhi-fang1,XIAMing-zhu2,LEIWu21.DepartmentofappliedChemistry,YangzhouCollegeofIndustryTechnology,Yangzhou225127,China;2.InstituteofIndustryChemistry,NanjingUniversityofScienceTechnology,Nanjing210097,ChinaAbstract:PhotocatalysisdegrationofcokingwastewaterwasstudiedbyusingtheanataseTiO2asphotocatalystandhigh-pressuremercurytampaslightsourceinthepaper.TheeffectsoffactorssuchastheamountofTiO2,thevolumeofair,thetime,theinitialpHvalueofsolutionandtherateofvolumeontheremovalrateofCODCrandchromaforcokingwastewaterwerediscussed.Theresultsshowedthattheoptimumconditionsweredeterminedadfollows:amountofTiO2is0.8gL-1,thevolumeofairis0.25m3h-1,theirradiationtimeis1.5h,initialpHvalueisabout10andtherateofvolumeis0.3.PhotocataluticoxidationprocessasdefectiveforthedecolorizationandCODCrremovalofcokingwastewater.Keywords:TiO2;photocatalysisoxidation;cokingwastewater53351 :TiO2