RETiO2PAC协同光催化处理焦化废水赵清华

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4,MBRSBRCODCr,,;,MBRSBR,。[][1],.[J].,1995,16(5):79-81.[2],.[J].,2004,24(z1):234.[3],,,.—AB[J].,2000,22(6):50.[4],,.[J].,2006,22(23):26-29.[](1985—),2006,。:15831138295,E-mail:zhappygirl@sina.com。[]2008-10-20()StudyonthephotocatalytictreatmentofcokingwastewaterwithRE-TiO2/PACreagentZhaoQinghua,YeChangying,QuanXuejun(DepartmentofChemicalEngineering,SchoolofChemicalandBiologicalEngineering,ChongqingUniversityofTechnology,Chongqing400050,China)RE-TiO2/PAC,,(,400050)[]RE-TiO2/PAC(RE,PAC),,。m(PAC)∶m(TiO2)=1∶1Nd-TiO2/PAC。pH、(COD)、、Nd-TiO2/PAC。COD385mg/L、pH9.82,0.5L/h、4g/L,90min,COD89%。[];;TiO2;;[]X703.1;TQ032[]A[]1005-829X(2009)06-0015-05Abstract:Rareearth-dopedTiO2(RE-TiO2)andpowderactivecarbon(PAC)reagentoxidationispreparedfortreatingcokingwastewater.Itshowsverygoodcooperativity.WhenthemassratioofPAC/TiO2is1∶1,thetreatmentefficiencyofNd-TiO2/PACisthebest.TheeffectsofinitialpH,initialconcentrationoforganismCOD,concentrationofcatalyst,andgasflowrateontheNd-TiO2/PACphotocatalysistreatmentofcokingwastewaterareinvestigated.WhentheinitialCODis385mg/L,andcokingwastewaterpHis9.82,aerationrateis0.5L/handcatalystconcentrationis4g/L,andafterbeingtreatedbyphotocatalysisfor90min,theCODremovalratecanreach89%.Keywords:cokingwastewater;photocatalysis;rare-dopedTiO2;activecarbon;cooperativitysynergisticeffect[](KJ080617)29620096IndustrialWaterTreatmentVol.29No.6Jun.,2009,,,,、。TiO2,、、、,!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!15——2009-06,29(6)TiO2。TiO2、、,,TiO2,,〔1-3〕。V.Durgakumari〔1〕TiO2TiO2,TiO2,TiO2,。,TiO2〔4-7〕,,La,f(、、、)Lewis,,TiO2〔8-11〕。,TiO2(RE-TiO2/PAC),。〔3,12〕,,,。11.1BZQ11H5-T-1,;W-2000,();DIS-IA,。DeggusaP25TiO2(BET50m2/g,21nm,TiO299.5%),(BET882m2/g,19.71mm,3.061nm,),、、。。1.2RE-TiO2/PACRE-TiO2,PAC。:40mL,RETi0.5%(〔13〕,,)P25TiO2,,40min,85℃,100℃12h,550℃3h,,,RE-TiO2,PACRE-TiO2RE-TiO2/PAC(〔1〕,TiO2)。1.3,100mL〔14〕,50W,,6.0cm,9.48W/m2。,,100mg/L,,,0.1mol/LNaOHH2SO4pH,,3d,COD。,90mL,,,30min,,。、,CODDIS-IA。22.1PAC、TiO2PACTiO2COD。2.1.1TiO2PACTiO2/PAC,2g/LPAC、TiO2PACTiO214g/LTiO2PAC,COD1061mg/L、pH9.8,1。6050403020100-300306090120150180TiO2PACTiO2/PACCOD/%/min1TiO2PAC16——2009-06,29(6)2COD/(mg·L-1)COD/(mg·L-1)TiO2/PAC281.0135.3Ce-TiO2/PAC468.310.4Nd-TiO2/PAC478.7145.7Yb-TiO2/PAC322.631.2Pr-TiO2/PAC395.593.7Eu-TiO2/PAC499.6114.5La-TiO2/PAC468.3104.1Sm-TiO2/PAC478.752.0Gd-TiO2/PAC520.462.41,TiO2,,150minCOD18.57%,PAC30min,25.77%,TiO2/PACTiO2PAC,,TiO2PAC。1,TiO2,,TiO2/PAC,,TiO2,TiO2,TiO2,TiO2,〔15〕;PAC,,,。〔16〕~〔18〕,。2.1.2PACTiO2TiO22g/L,PAC,COD1061mg/L、pH=9.82,3hCOD,PACTiO2,1。,COD。1,PAC,CODCOD,PACTiO21COD,COD,PACTiO21。2.1.3TiO2m(PAC)∶m(TiO2)=1,0.5L/h,COD1061mg/L、pH=9.82,RE-TiO2/PAC,3hCOD,,2。2,TiO2,RE-TiO2/PAC,Nd-TiO2/PAC,,,,。Nd-TiO2/PACCOD,COD,Nd-TiO2/PAC。2.2Nd-TiO2/PACNd-TiO2/PAC,、、pH(COD)。2.2.1COD,L-H〔19〕:R=kKc/(1+Kc):R———;k———;K———。,Kc1,R=kKc,,ln(c0/ct)=kt;,Kc1,R=k,,,c=c0-kt。,,pH=9.82、COD,0.5L/h,2。2,COD,COD,,COD385mg/L90min,COD89%。2,COD,COD(c0=1PACTiO2m(PAC)∶m(TiO2)COD/(mg·L-1)COD/(mg·L-1)0.5353.962.41468.3124.91.5551.652.02562.052.03582.862.44572.452.05572.441.6,:RE-TiO2/PAC17——2009-06,29(6)2200200018001600140012001000800600400200-300306090120150180210240/minCOD/(mg·L-1)2CODCOD110010009008007006000306090120150180210pH4.607.039.8210.9511.97COD/(mg·L-1)/min3pHCOD385、676、1113mg/L),COD,;COD(c0=1498、1686、2196mg/L),COD,90min,,L-H,,,。2.2.2pHNd-TiO2/PAC4.0g/L,0.5L/h,COD1124mg/L,pH,COD3。pHTiO2,。3,pHpH(pH9.82~10.95),COD,pH(pH=4.60)、(pH=7.03)(pH=11.97),(COD)。pH9.82,,,pH,。2.2.3COD1124mg/L,0.5L/h,,4。4,。Nd-TiO2/PAC,h+,;Nd-TiO2/PAC,,,Nd-TiO2/PAC,,,。4.0g/L,COD,180minCOD5.0g/L,,4.0g/L。2.2.4Nd-TiO2/PAC4.0g/L,COD1124mg/L,,5。5,150min,,;150min,0.5L/h,,110010009008007006000306090120150180210/minCOD/(mg·L-1)2.0mg/L3.0mg/L4.0mg/L5.0mg/L6.0mg/L4COD110010009008007006000306090120150180210240/min0.3L/h0.4L/h0.5L/h0.6L/hCOD/(mg·L-1)5CODc0=385mg/Lc0=676mg/Lc0=1686mg/Lc0=2196mg/Lc0=1113mg/Lc0=1498mg/L18——2009-06,29(6),、,,,,。,,、。···············································———,,,.CN101134614.,:RE-TiO2/PAC。,O2,,O2,,HO·,〔19〕。,。0.5L/h。3PACTiO2。TiO2,RE-TiO2/PAC,,PACTiO21Nd-TiO2/PAC。、pHCOD。,,。0.5L/h、4g/L,Nd-TiO2/PACpH9.82、COD385mg/L,90minCOD89%。[][1]DurgakumariV,SubrahmanyamM,SubbaRaoKV,etal.AneasyandefficientuseofTiO2supportedHZSM-5andTiO2+HZSM-5ze-olitecombinateinthephotodegradationofaqueousphenolandp-chlorophenol[J].Appl.Catal.A,2002,234(1/2):155-165.[2]NoorjahanM,DurgaKV,SubrahmanyamM,etal.Anovelandefficientphotocatalyst:TiO2-HZSM-5combinatethinfilm[J].Ap-pl.Catal.B,2004,47(3):209-213.[3]MatosJ,LaineJ,HerrmannJM.Synergyeffectingthephoto-catalyticdegradationofphenolonasuspendedmixtureoftitaniaandactivatedcarbon[J].Appl.Catal.B,1998,18(3):281-291.[4]JinS,ShiraishiF.Photocatalyticactivitiesenhancedfordecompo-sitionsoforganiccompoundsovermetal-photodepositingtitaniumdioxide[J].Chem.Eng.J.,2004,97(2/3):203-211.[5]DiP,AgatinoGL,ElisaMG,etal.SurfacecharacterisationofmetalionsloadedTiO2photocatalysts:structure-activityrelationship[J].Ap-pl.Catal.B,2004,48(3):223-233.[6],,,.TiO2[J].,2002,23(12):2317-2321.[7],,,.TiO2[J].,2004,20(2):138-143.[8]RanjitKT,WillnerI,BossmannSH,etal.La

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