超声Fenton法处理偶氮染料橙黄II的研究张翼

-FentonII张　翼　张　晖＊　吴　峰　王正琪(,430072)　　II,Fenton,pH、H2O2、Fe2+COD。,FentonII。,100mg/L、pH3.0、Fe2+10mg/L、H2O2400mg/L,90min,COD93%。　　Fenton　II　CODDegradationoforangeIIinwaterbyultrasound/FentonmethodZhangYi　ZhangHui＊　WuFeng　WangZhengqi(DepartmentofEnvironmentalScienceandEngineering,WuhanUniversity,Wuhan430072)Abstract　TheeffectsofpH,H2O2concentrationandFe2+concentrationontheCODremovalefficiencyofor-angeIIwereinvestigatedbyultrasound/Fentonprocess.ItwasverifiedthatultrasoundcouldenhancethedegradationoforangeIIbyFentonreagents.Withultrasoundradiation,thehighestCODremovalratewasachievedtobe93%af-ter90minutesreactionunderthefollowingoptimalconditions:100mg/Lofinitialdyeconcentration,10mg/Loffer-rousionconcentration,400mg/Lofhydrogenperoxideconcentrationand3ofinitialpH.Keywords　ultrasound;Fentonreagents;orangeII;COD:(20015005061):2003-01-22;:2003-04-22:(1974～),,,,:。＊　　,COD,。,,50%,,。,Fenton(advancedoxidationprocesses,AOPs)[1—5]。Fenton,·OH,·OH(2.80V)(1.36V,1.77V,2.07V),。Fenton,,[6]。Fenton,,Fe(III),。,,,(US)AOPs[7,8]。,“”,。,,,US,,US()[7]。USFenton,Fenton,pH、Fe2+H2O2FentonII。1　1.1　KS-250,,,320-SpH,NN-S568WFS,FR-100。1.2　II(),(),H2SO4411Vol.4,No.11200311TechniquesandEquipmentforEnvironmentalPollutionControlNov.2003(),H2O2(30%),FeSO4(),(),,()。1.3　II,。,H2SO4NaOHpH,H2O2FeSO4,。,30℃。,NaOHpH=8,COD[9]。1。1　Fig.1　Theexperimentalsetup2　2.1　US/FentonFentonFenton,()US/FentonFentonII,2。2　US/FentonFentonFig.2　ComparisonofCODremovalratesofFentonprocessandUS/Fenton2,,Fenton,60min,COD63%,FentonCOD47%。120min,US/Fenton71%COD,Fenton49%。Fenton,Fe2+H2O2·OH[10]:Fe2++H2O2Fe3++·OH+OH-(1)·OH。Fe2+(1)Fe3+,H2O2Fe-O2H2+,Fe2+HO2·[11]:Fe3++H2O2Fe-O2H2++H+(2)Fe-O2H2+USFe2++HO2·(3),Fe2+(1)(3),Fenton,Fenton,US/FentonCOD。2,US/FentonCOD60min,90—120min,COD69%71%,,90min。3　pHCODFig.3　TheeffectofpHonCODremovalrate2.2　pHCODpHFenton,3pH3,COD,pH=7,COD。,Fenton[10],pH·OH,Fe2+[12]。,H2O2H2OO2,Fe2+·OH。,pH,Fe-O2H2+(2),Fe2+4911　:-FentonII(3),Fenton,COD,3。2.3　Fe2+COD　　Fe2+,H2O2·OH。Fe2+,,COD[4,5],4。4,2—10mg/L,CODFe2+,Fe2+,COD[4,5,12]。4　Fe2+CODFig.4　TheeffectofferrousionconcentrationonCODremovalrateFe2+(1)·OH,,[13],,,·OH:·OH+·OHH2O2(4),[14],,[15—17],·OH。2.4　H2O2COD　　5CODH2O2,400mg/L,COD93%,H2O2,COD。,·OH(1)H2O2;,Fe2+Fe3+,Fe3+,·OH[12]。,·OH:H2O2+·OHH2O+HO2·(5)5　H2O2CODFig.5　TheeffectofhydrogenperoxideconcentrationonCODremovalrate·OH。HO2·(1.70V),·OH(2.80V),,Fenton[18,19]。3　　(1)FentonII。(2)pH3.0—7.0,CODpH,pH3.0,COD。(3)Fe2+2—10mg/L,CODFe2+。(4)H2O250—600mg/L,H2O2COD。100mg/L、pH3.0、Fe2+10mg/L,H2O2400mg/L,90min,COD93%。[1]LinS.H.,LoC.C.Fentonprocessfortreatmentofdesizingwastewater.Wat.Res.,1997,31(8):2050—2056[2],,.Fenton.,1999,20(3):72—74[3],,.FentonKBR.,1997,13(6):16—18[4],,.Fenton504.,2001,34(5):76—80[5],,,.Fenton.,2002,28(3):46—49[6],.Fenton.,2001,20(12):1—3[7],,..,2000,1(1):56—64[8],,,..,2001,2(2):64—69[9]..,1995,14(6):60—63[10]WallingC.Fenton'sreagentrevisited.AccountsChem.Res.,1975,8(4):125—131[11]LinJ-G,MaY-S.Oxidationof2-chlorophenolinwaterbyul-trasound/Fentonmethod.J.Environ.Eng.,2000,126(2):130—137[12],,,.Fenton.,2000,21(3):93—96[13]BuxtonG.V.,GreenstockC.L.,HelmanW.P.,RossA.B.Critical-reviewofrateconstantsforreactionsofhydratedelectrons,hydrogen-atomsandhydroxylradicals(·OH/·O)inaqueous-solution.J.Phy.Chem.Ref.Data.,1988,17(2):513—886[14]SuslickK.S.Sonochemistry.Science,1990,247:1439—1445[15]BerlanJ.,TrabelsiF.,DelmasH.,WilhelmA.M.,PetrignaniJ.F.Oxidativedegradationofphenolinaqueousmediausingultrasound.UltrasonicsSonochemistry,1994,1(2):S97—S102[16]HagensonL.C.,DoraiswamyL.K.Comparisonoftheef-fectsofultrasoundandmechanicalagitationonareactingsol-id-liquidsystem.Chem.Eng.Sci.,1998,53(1):131—148[17]WeaversL.K.,HoffmannM.R.Sonolyticdecompositionofozoneinaqueoussolution:Masstransfereffects.Environ.Sci.Technol.,1998,32(24):3241—3247[18],HuangC.P.Fenton.,2002,18(3):14—17[19]ZhangH.,HuangC-P.TreatmentoflandfillleachatebyFen-tonoxidationprocess.Chin.J.Chem.Eng.,2002,10(1):128—131(责任编辑:郑晓梅)征订启事《》《》,,,,,。:;:DK32014,:28—174。20,5000,,、;、、;、、、、、、、、,,、。;,、、、。:ISSN1008—9500;:CN32—1332/TG,:3203004000013。200475/(),12。:221006,65《》5111　:-FentonII