电解Fenton法处理生活垃圾焚烧厂渗滤液的动力学研究

Fenton1,1*,2,1,1,1(1.,200092;2.,325027):,-FentonCOD.:FentonCOD,tCOD:ct=(2kt+c-20)-0.5.FentonCOD,pHCODk.COD,Fenton.:;;Fenton;:X705:A:0250-3301(2006)08-1591-05:2005-07-12;:2005-09-08:(863)(2003AA644030):(1977~),,,.*KineticsofElectro-FentonTreatmentofLeachatefromMunicipalSolidWasteIncineratorHUChen-yan1,LIGuang-ming1,XIAFeng-yi2,ZHAOXiu-hua1,ZHOUYang-yuan1,DENGDa-iqing1(1.StateKeyLaboratoryofPollutionControlandResourceReuse,TongjiUniversity,Shanghai200092,China;2.WenzhouNormalCollege,Wenzhou325027,China)Abstract:SPRelectrodewasusedinElectrio-Fentontreatmentontheeffluentfrombiologicalandcoagulativetreatmentsofsolidwasteincineratorleachate,atthesametime,thekineticsmodelfortheCODeffluentconcentrationweresetup.TheresultindicatedthatthedisposalcurveofCODconfirmtothepseudothirdorderkinetics,andtheformulaisct=(2kt+c-20)-0.5,inwhichthectistheCODconcentrationoftreatmenteffluent.WiththestatisticalanalysistothedisposalcurveofCODfromElectro-Fentontreatmentindifferentconditions,theexperiencemathematicsmodelofkvaluewassetup,inwhichthecurrentdensity,pHvalueandCODconcentrationofinfluentareeffectivefactors.Moreover,withthecomparisonbetweenthesimulativeCODofeffluentandtheexperimentalresults,itwasshowedthatthiskineticmodelcouldbeusedtoinvestigatetheCODdisposalefficiencyofElectro-Fentontreatmentontheeffluentfrombiologicalandcoagulativetreatmentsofsolidwasteincineratorleachatepreferably.Keywords:leachate;solidwastecombustion;Electro-Fenton;kineticmodel,,.,,.,,,[1].,1,COD,B/C016~018,,,[2],.Fenton,,H2O2Fenton,,Fenton[3,4].SPR-,.1,-,1.COD500mg/L,,.Fenton27820068ENVIRONMENTALSCIENCEVol.27,No.8Aug.,2006(6cm@13cm)1,RuO2-IrO2-TiO2/Ti(SPR),6cm@13cm1mm1,500mL.:300mg/L,pH,,5mm,100cm2/L,Fenton,,COD.1Table1WaterqualityofexperimentalleachateCOD/mg#L-1pH/NTU//mg#L-1/LS#cm-2/mg#L-1350~7505.5~720~40200~4504500~550018000~2100045~5522.1COD[COD]0516mg/LpH420mA/cm2,COD1.,,,(1):d[COD]=k#[COD]3t#dt(1)t=0,[COD]t=516,(2),.[COD]t=[2kt+[COD]-20]-1/2R2=019819(2),k=713910@10-8L2#(mg2#min)-11,,COD.60minCOD,50%,2hCOD10%.,,COD.1CODFig.1CODdegradationcurve212[COD]0506mg/LpH4,,COD2.(2)[COD]k3.2CODFig.2DegradationofCODwithdifferentcurrentdensity3-lgkFig.3-lgkvaluewithdifferentcurrentdensitycurrentdensity3,,k,COD.,,,H2O2Cl2,[5],Fenton,COD.k,,,,,k159227COD[6].-lgk(3):-lgk=1.833@10-4x3-8.140@10-3x2+0.06449x+7.504(3),x(mA#cm-2),R2=019819.213pH[COD]0460mg/L,20mA/cm2,pH,pHCOD4.(2)[COD]k5.4pHCODFig.4DegradationcurveofCODwithdifferentpHvalue5-lgkpHFig.5Variationsimulationsof-lgkvaluewithdifferentpHvalue4~5,FentonpH4,3~5,.pH,,FentonpH3~5[7,8].Lin[9][10],pH4,.-lgkpH(4):-lgk=-0.01514x3+0.2551x2-1.264x+8.879(4),xpH,R2=019883214COD20mA/cm2,pH=4,[COD]0,[COD]0COD6.(2)[COD]k7.6CODCODFig.6DegradationcurveofCODwithdifferentCODconcentration7-lgkCODFig.7Variationsimulationsof-lgkvaluewithdifferentCODconcentration6,7,kCOD,COD450mg/L600mg/L,k.CODCOD,,(#OHH2O2Cl2ClO-),.-lgk[COD]0(5):-lgk=2.040@10-8x3-3.386@10-5x215938+0.01890x+3.414(5),x[COD]0(mg/L),R2=019866.215k,,pHCODFenton.3,,Fenton-lgk,,(6),(7)~(9).-lgk=F(x1,x2,x3)=af1(x1)bf2(x2)cf3(x3)d(6)f1(x)1=1.833@10-4x31-8.140@10-3x21+0.06449x1+7.504(7)f2(x2)=-0.01514x32+0.2551x22-1.264x2+8.879(8)f3(x3)=2.040@10-8x33-3.386@10-5x23+0.01890x3+3.414(9),x1(mA/cm2),x2pH,x3COD(mg/L).abcd.Matlabnlinfit,,2.2,R2019859,FentonCODk.,,,k,,pH,.2Fenton-lgkTable2Parametersofmathematicmodelfor-lgkvalueofElectro-FentontreatmenttocombustionleachateabcdR20.02031.06510.94890.99330.9859216FentonCOD(10)(11).ct=(2kt+x-23)-0.5(10)-lgk=0.0203(1.833@10-4x31-8.140@10-3x21+0.06449x1+7.504)1.0651(-0.01514x32+0.2551x22-1.264x2+8.879)0.9489@(2.040@10-8x33)-3.386@10-5x23+0.01890x3+3.414)0.9933(11),t(min),ctFentontCOD(mg/L),x1(mA/cm2),x2pH,x3COD(mg/L).pHCODCOD,3.3Table3ComparisonofCODconcntrationofeffluentcalculatedbykineticmodelandexperimentaldataCOD/mg/L-1/mA#cm-2pHCOD/mg#L-1/min1104555903263382155493303993803203475602372433,,COD,pHCOD,FentonCOD.8~10k.8,COD500mg/L,kpH.,k,COD;pH4,,kCOD,pH4,,kCOD,,,,pH,k.9,pH4,kCOD.,1594278kpHFig.8kvaluevaredwithcurrentdensityandpHvalue9kCODFig.9kvaluevariedwithcurrentdensityandCODconcentration10kpHCODFig.10kvaluevariedwithpHvalueandCODconcentration,k,20mA/cm2,;COD,k,15mA/cm2,COD.10,20mA/cm2,kpHCOD.,COD,pH4k,COD450mg/L,.COD,pH.3(1)300mg/L,20e,5mm,100cm2/L,FentonpH4,20mA/cm2.1h,COD50%.(2)FentonCOD,:[COD]t=[2kt+[COD]-20]-1/2.(3)pHCODk,k,COD,pH4k,COD.(4)Matlabnlinfit,k,k,pHCODCOD.FentonCOD.:[1],.[M].:,2000.278~279.[2],,,.A2/O[J].,2001,17(11):13~16.[3],.[J].,2004,10(4):24~26.[4]FockedeyE,VanLierdeA.Couplingofanodicandcathodicreactionsforphenolelectro-oxidationusingthree-dimensionalelectrodes[J].Wat.Res.,2002,36:4169~4175.[5],.[J].,2002,25(2):17~21.[6],.[M].:,2003.193~199.[7]LidiaSzpyrkowicz,ClaudiaJuzzolino,Acomparativestudyonoxidationofdispersedyesbyelectrochemicalprocess,ozone,hypochloriteandFentonreagent[J].Wat.Res.,2001,35(9):2129~2136.[8],,,.Fenton[J].,2004,27(3):105~108.[9]LinSH,ChangCC,Treatmentoflandfillleachatebycombinedelectro-Fentonoxidationandsequencingbatchreactormethod[J].Wat.Res.,2000,34(17):4243~4249.[10],,,.[J].,2001,17(8):14~17.