沸石负载TiO2光催化降解造纸废水研究

304Vol.30No.420077Non-MetallicMinesJuly,2007TiO2TiO2-TiO2[1]TiO2[2,3]TiO2TiO2TiO2(VB)(CB)Ebg(3.2eV)TiO2(e)(h)-(electron-holepairs)7.5eVHOH2O(HO·)O2O2·H(e)HO·HO·CO2H2OCODTiO2***(110142)-(sol-gel)TiO2XRDSEMpH4.08.0h50g/LCOD82%StudyonPhotocatalyticDegradationofPapermakingWastewaterbyTiO2-coatedNaturalZeoliteShiZhongliangYaoShuhuaHuaLi(DepartmentofAppliedChemistry,ShenyangInstituteofChemicalTechnology,Shenyang110142)AbstractUsingtetrabutyltitanateandethanolasreactionrawmaterials,thephotocatalystofTiO2-coatednaturalzeolitewaspreparedbysol-gelmethod.TheexperimentaltechniquesofXRDandSEMwereusedtocharacterizethepreparedTiO2-coatedphotocatalyst.TheexperimentalresultsshowedthattheremovalrateofCODfrompapermakingwastewatercanreach82%attheconditionsofpHvalue4.0,radiationtime8.0h,amountofcatalyst50g/L.Thephotocatalysthadahighactivityafterreusedfourtimes.Kineticsanalysisshowedthatthephotocatalyticdegradationreactionofpapermakingwastewatercanbedescribedbyapseudo-firstorderrateequation.Keywordstitaniumdioxidenaturalzeolitephotocatalysispapermakingwastewaterdegradation(20040284)(20063202)304200772.1JB5374-91(())DF-101S()76-1()101-2()()()()(COD1066.67mg/L)2.2()(70.83%)(21.64%)(5.80%)(%)SiO269.58Al2O313.65Fe2O32.55CaO2.3Na2O2.58K2O1.37MgO0.877.1100(0.15mm)1055h2.310mL(98%)20mL301.0mL1.0mL(1800r/min)5.0g4h1.5mL10mL80TiO23004hTiO2(GB/T19591-2004)2.4RigakuD/max-rBX(CuKα)X(XRD)JEOLJSM-6360LV(SEM)2.5254nm400W(COD1066.67mg/L)pH(TiO26.57%)15min5min[4]CODCOD3.1.1XRD(a)TiO2(b-200c-300d-400e-500)XRD11300300TiO2300TiO2400TiO2850~950[5,6]TiO22θ/(°)1XRD3.1.2SEM(a)300TiO2(b)22TiO2TiO2300TiO2XRD2SEMa-b-300TiO23.2pHCODH2SO4NaOHpHpH50mL8.0hCOD30420077COD33pHCODpHpH4.0CODpHCODpH4.03pHCOD3.350mL(pH4.0)8.0hCOD44TiO2/CODTiO2/-·OHTiO2/50g/LCOD4COD3.42.5g50mL(pH4.0)COD55CODTiO2-TiO2(·OH)COD8.0hCOD8.0h5COD3.5TiO2TiO2(300)(50g/L)/TiO23(50mL)30066TiO2TiO2TiO2TiO2TiO2TiO2TiO2TiO2TiO2TiO2COD73%(COD53.7%~78.3%[7]68.3%[8])COD6CODCODCOD30420077TiO2COD7L1L2L3L42003004005007TiO2lnC+KC=kt+α[9]α=lnC0+KC0kKC0Ct(CODmg/L)t(h)711TiO2(R)0.98k/hαRL10.13616.95120.9864L20.20366.98140.9877L30.16166.94310.9946L40.08956.90520.9871TiO2300200400TiO2300300TiO2300(2)TiO21.TiO250g/LpH4.08.0hCOD1066.67mg/L191.8mg/L82%20012.lnC+KC=kt+αTiO2(R)0.981HiroshiY,TsukasaT.Titaniumdioxide/adsorbenthybridphotocata-lystsoforganicsubstancesofdiluteconcentration[J].CatalToday,2000(1):1~212DuYangmin.Reviewsandprogressofwastewatertreatmentinpapermanufacturing[J].IndustrialWaterTreatment,1997,17(3):1~53YangRunchang,ZhouShutian.Studyontheroleofsulfuricacidbythecatalytichydrolysisofblackliquorfromstrawfiberpulpingprocess[J].ChineseJournalofEnvironmentalScience,1994,15(5):46~484,.MnSO4COD[J].,2003,21(5):54~565,.[J].,2006,27(2):240~2426,.[J].,2005,33(1):73~767,.[J].,2002(6):37~398,,.WO3/-Fe2O3/W[J].,2001,19(2):131~1389,,.[J].,1998,19(9):1475~14782007-04-26COD[J].,1997,6(6):1~97,,.[J].,2000,34(3):15~1538,,,[J].InorganicMaterials,1995,2(258):310~3199SASEl-Hemaly,TMitsuda,HFWTaylor.Synthesisofnormalandanomaloustobermorites[J].CementandConcreteResearch,1977,7(4)2007-04-18