光催化超声波联合降解炼油厂含油废水动力学的研究

-李书珍1,王磊2,李林2,3(1.,213016;2.,200237;3.,471000):炼油厂含油废水具有COD值高和含油量高易燃等特点,造成环境污染.本文探讨超声波-紫外线联合降解炼油厂含油废水的反应机理;并对反应动力学进行了研究,建立了动力学模型.其动力学方程为(-rA)=0.116CA,动力学参数为:Ea=56.1kJ/mol,k0=3.1.采用不同实际体系的实验数据对动力学模型进行了验证.结果表明,动力学模型的计算数据与实验数据能够较好的吻合.:降解;机理;动力学;模型:O644.12:A:1001-2443(2007)02-0142-04,,COD[1],..;;,;.,,[2].,,,-,;-,.11.1(300W)UV762SCQ-150W200KHZ1.2ARARAR1.3150mL,:2006-11-28:(1969-),,,.30220073()JournalofAnhuiNormalUniversity(NaturalScience)Vol.30No.2Mar.2007,(PEG).,15e30mLTiCl4,,.10g,1h,20h,,,,5h,300e4h.1.4COD;,225nm;=(1-A/A0)*100/100,,,AA0.22.1-:[3],(1):(1),,;(2);,,O2OH#O#HO2#,,OH#O#HO2#,,;,,.1Fig.1CavitationprocessTiO2,K[387.5nm,,.,(e-),(h+),-.,,.,.TiO2+hvyh+vb+e-cb(1)O2+TiO2(e-)yTiO2+#O-2(2)#O2+2H2O+TiO2(e-)yTiO2+H2O2+2OH-(3)H2O2+TiO2(e-)yTiO2+#OH+OH-(4)TiO2(h+)+phenoly#phenol+yCO2+H2O(5)#OH+phenolyCO2+H2O(6),.,TiO2,H2OOH-,TiO2.H2OOH-#OH,.2.2-2.2.1WL型光催化剂的反应动力学模型,287.5mg/L,30e,WLTiO2,,143302,,:-2Fig.2Regressioncurveofexperimentdataofdegradationofsimulatingsystem,2.L-H[4]-rA=-dcAdt=k1k2cA1+k2cA(7)k2cA1,.-rA=-dcAdt=kcA(8)k=k1k2,,ln(CA0/CA),k,3.3,,k=0.116,R=0.996,(-rA)=0.116CA.40e,50e,60e.k=k0e-Ea/RT,:lnk=-EaR#1T+lnk0,1/T-lnk,,Ea/RT,-lnk0,,4.3ln(C0/C)T4-lnk1/TFig.3Relationbetweenln(CA0/CA)andTFig.4Relationbetween-lnkand1/T4,Ea=56.1kJ/mol,k0=3.1,R2=0.996.2.330e,WLTiO2,,5.5Fig.5Comparisonmodelcalculationdatawithexperimentdata5,,1(260.7mg/L)2(180.2mg/L),,,,,5,,..144()20073-,-,(-rA)=0.116CA,:Ea=56.1kJ/mol,k0=3.1..,.:[1]ZIKARG.Advancesinmarinephotochemistry[J].ReviewsofGeophysics,1987,25(5):1390-1394.[2]HAFFMANMR.Environmentalapplicationofsemiconductorphotocatalysis[J].ChemRev1991,95(1):59-96.[3]SEONGNamNam,SANGKukHan,JOONWunKang,etal.Kineticsandmechanismsofthesonolyticdestructionofnonvolatileorganiccom-pounds:InvestigationofthesonochemicalreactionzoneusingseveralOH#monitoringtechniques[J].UltrasonicsSonochemistry,2003,10(4):139-147.[4],.[J].,2000,20(6):540-543.KineticsModelofDegradationbyPhotocatalysis-UltrasonicTechnologyonOilRefineryWasteWaterLIShu-zhen1,WANGLei2,LILin2,3(1.JiangsuChangzhouHigherVocationalSchoolofConstruction,Changzhou213016,China;2.CollegeofChemicalEngineeringEastChinaUniversityofScienceandTechnology,Shanghai200237,China;3.LuoyangPetrochemicalCorporation,Luoyang471000,China)Abstract:CODandoilcontentishighinoilrefinerywastewater.Organiccompoundpollutionisveryuniversalincircumstances.Degradationmechanismofoilrefinerywastewaterisexplored,andreactionkineticsmodelisinvestigatedbycombinedtechnologyofultrasonicandultraviolet.Kineticsequationis(-rA)=0.116CA,kineticsparameters:Ea=56.1kJ/mol,k0=3.1.Thereactionkineticsmodelisverifiedbyexperimentdataofdifferentactualsystems.Resultsindicatethatcalculationdatabymodelagreewithexperimentaldata.Keywords:degradation;mechanism;kinetics;model145302,,:-