光催化降膜反应器深度处理焦化废水研究胡玲

、、、[1]。。。、、、、。。1。2[2]。11.1C16H36O4Ti、、C6H12、、、H2O230%。KSW-5-12TL0.01RB12SK3200LHT6PHS-3C18W×3。1.2233mm×132mm×5mm15min15min15min。TiO2-xNx1SiO2。1[3]。1.3pH=6.6COD=372mg·L-1611.516.9NTU。1.44300812COD。pH=11.0、3%H2O2500mg·L-1、5h、COD125mg·L-1COD40%。TiO2-xNxTQ032.41A1000-3770(2011)[e-mail]

6h
V(CHOTi):V(CH)=1:1~10 TiO 1205min150mmmin1205min300mmminTiOTiON1TiO2-xNxFig.1FlowchartforpreparationofTiO2-xNxthinfilms37220112TECHNOLOGYOFWATERTREATMENTVol.37No.2Feb.,2011110DOI:10.16796/j.cnki.1000-3770.2011.02.028。3%H2O2pH30min2L2λ=350～520nm54W32.3μW·cm-2。2h。1.5COD[4]。CODCOD=(COD-COD)×100%/COD。22.1pH22h3%H2O2500mg·L-1NaOHHNO3pH3.0、5.0、7.0、9.011.03。pHCOD。4pH=3.0～11.0pH=11.0。pH7pHH+pH=7pH7pHOH-·OH[5]。pH11.0。2.222hpH11.0H2O24。4H2O2TiO2-xNx。H2O23%H2O2500mg·L-1。H2O2H2O2·OH[6]。H2O2。H2O2TiO2-xNxH2O2·OH·HO2-[7]。3%H2O2500mg·L-1。2.32hpH11.03%H2O2500mg·L-11、2、3、4、5COD372、188、125、94、75mg·L-15。COD。COD2Fig.2Flatladder-typereactor3pHFig.3EffectofpHonphotocatalyticactivity
234567891011120510152025COD
/%pHρ(H2O2)/mg·L-14H2O2Fig.4EffectofH2O2onphotocatalyticactivity
10020030040050060070005101520COD
/%111。51～3COD。4～5COD。COD。COD3125mg·L-1。2.43pH11.03%H2O2500mg·L-11～7h6。65h。。5h。3CODLangmuir-HinshelwoodL-H。[8]。L-HTiO2-xNxr=-dρdt=kKρ1+Kρ1-1r=1kKtρt+1k。22kKtρtt。21/r1/ρt。Ktρt11ln(ρt/mg·L-1)t。ln(ρ0/ρt)=kKt3ln(ρt/mg·L-1)=kK1t。4K1。COD372、188、125、94、75mg·L-15h。ln(ρt/mg·L-1)t1。7K11。1COD75～372mg·L-15hρ0tL-H18。Kl/min-1-r/mg·L-1·min-1-r-1/L·min·mg-11Tab.1Initialreactingvelocityofphotocatalysisreactionρ0/mg·L-13721881259475-0.0570-0.0704-0.0645-0.0763-0.059121.213.28.067.174.430.04720.07560.1240.1390.2265CODFig.5Effectofwastewaterconcentrationonphotocatalyticactivity
0123456010203040
COD/%6Fig.6Effectofirradiatedtimeonphotocatalyticactivity
01234567801020304050
/hCOD/%7Fig.7Effectofwastewaterconcentrations
01234563.03.54.04.55.05.56.0ln

/mgL/h372112STUDYONADVANCEDTREATMENTOFCOKINGWASTEWATERBYPHOTOCATALYTICFALLINGFILMREACTORHuLing,LiangWendong,MaYi,LiJun(CollegeofChemicalEngineeringandTechnology,WuhanUniversityofScienceandTechnology,Wuhan430081,ChinaAbstract:Usingofvisible-light-typecascadereactordegradecokingwastewater,thefluorescentlampisthelightsource.ExploredtheimpactfactorsofCODremovalefficiencyandobtainedthebestprocessconditions.Theresultsshowedthat:Inthevisiblelight,pH=11.0,H2O2(3%)=500mg·L-1,irradiationtimeis5h,wastewaterconcentration(COD)=125mg·L-1,CODremovalrateswere40%ormorerespectively,Photocatalyticdegradationofcokingwastewaterisrealizeavisiblelightresponse.Keywords:TiO2-xNxthinfilms;cascadefallingfilmreactor;hydrophilic;cokingwastewater4TiO2-xNxCOD。pH=11.03%H2O2500mg·L-15hCOD125mg·L-1COD40%。L-H1。。。[1],,.[M].:,2007.[2],.[J].,2009,35(1):79-82.[3],,.TiO2/SiO2:,1451473[P].2003-10-29.[4]《》.[M].4.:,2002:211-213.[5],.[J].,2006,29(2):103-105.[6],.[J].,2006,35(2):117-119.[7],,,.TiO2[J].,2007,35(2):50-53.[8]HatipogluNSan,AKocturkG,CinarZ.Degradationoftraceamountoforganohologensolventinwater[J].JPhotochemPhotobiol,A:Chem,2001,139:225-232.8L-HFig.8SimulationofL-Hmodel
01234560.000.050.100.150.200.25ln

/mgL/h

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