UV_H_2O_2工艺降解微囊藻毒素_LR

UVPH2O22LR,3,,,,(,200092):UVPH2O2,H2O2pH2LR(MC2LR).,H2O2MC2LR;UVMC2LR;UVPH2O2.,,MC2LR;MC2LR,;H2O2,,H2O21mmolPL3mmolPL,010844011664;pH3113,MC2LR;MC2LR,CO2-3NO-3.:UVPH2O2;2LR;:X52:A:025023301(2009)0220457206:2008203205;:2008204221:(2006BAJ08B06,2007BAC26B03):(1984),,,,E2mail:[e-mail]3,E2mail:[e-mail]2LRbyCombinationofUVPH2O2ProcessGUOJian2wei,GAONai2yun,YINDi2di,LILei,DONGBing2zhi,ZHANGKe2jia(StateKeyLaboratoryofPollutionControlandResourceReuse,TongjiUniversity,Shanghai200092,China)Abstract:ThedegradationofMC2LRinwaterbyUVPH2O2processwasinvestigated.TheeffectsofintensityofUVradiation,initialconcentrationofMC2LR,dosagesofH2O2,initialpHvalueandanionsondegradationofMC2LRbyUVPH2O2processwerestudied.TheresultsshowthattheremovalofMC2LRonlybyH2O2isnearlyzero,andUVprocesscandegradeMC2LRtoacertainextent.However,thedegradationefficiencyofUVPH2O2processismuchhigherthanUVandH2O2processduetothesynergeticeffectbetweenUVandH2O2.TheremovalofMC2LRincreaseswiththeenhancementofintensityofUVradiation,butdecreasesgraduallywiththeincreaseofinitialconcentrationofMC2LR.WhenthedosagesofH2O2changefrom1mmolPLto3mmolPL,theconstantofdegradationraterisesfrom010844to011664.TheoptimumpHvalueis3113.TheaddedanionshaveadverseeffectonthedegradationofMC2LR,especiallycarbonateandnitrateionshavethebiggestinfluenceamongthestudiedanions.Keywords:UVPH2O2;MC2LR;degradation,.(MCs),,[14].,[57].,,[5,8].,MC2LR100250ngPL,MC2RR450650ngPL[9].,[10].MCsFentonFenton,UVPH2O2[8,11].MC2LR,,MCs.11.11.1.1,1.,,254nm,75W..1.1.2MC2LR.,,.,-1812h,3.,30220092ENVIRONMENTALSCIENCEVol.30,No.2Feb.,20091UVPH2O2Fig.1SchematicdescriptionoftheUVPH2O2reactor,.0145m.SPE2HPLC.1.1.3MC2LR();30%();pHHCl,NaOHNaClNa2CO3NaNO3Na2SO4;.1.2UVPH2O2MC2LR,UVH2O2MC2LRpHCl2NO-3CO2-3SO2-44,,011molPLNa2SO325L.1.3MC2LRMC2LR(LC22010AHT);ShimadzuVP2ODS(250mm416mm);(Sigma2Aldrich,USA)Milli2Q(Millipore,Molsheim,France)PH2O(0105%,)=60%P40%;14min,1mLPmin,40.2Huang[12],UVPH2O2:H2O2+h2OH(1)H2O2+OHHO2+H2O(2)H2O2+HO2OH+H2O+O2(3)2OHH2O2(4)2HO2H2O2+O2(5)OH+HO2H2O+O2(6)MC2LR+OH(7)MC2LR+HO2(8),UVPH2O2:UV,OHMC2LR,.Benitez[13],UVPH2O2:[OH]=WabsPVk1cB+kh[H2O2]+ks[S](9)-dcBdt=k1[OH]cB(10),[OH]OH;H2O2;WabsH2O2;V;cBMC2LRt;[H2O2]H2O2t;[S]OH;klkhksOHMC2LRH2O2OH.H2O2MC2LR,(9)klks,H2O2,UVPH2O2.,(9)(10):-dcBdt=k1WabscBVkh[H2O2]=KcB(11),K,t=0,cB=cB0,:cB=cB0exp(-Kt)(12)33.1UVUVPH2O2MC2LR,H2O2MC2LR,H2O2(1177V)MC2LR,UVUVPH2O2.MC2LR15212gPL,UV153WPcm2,H2O22mmolPL,2.2,UVMC2LR,32min66185%.UVPH2O297%,UV.1,UVPH2O2K=011238,UV4165.85430UVH2O2,MC2LR.2UVUVPH2O2MC2LRFig.2ComparisonbetweenthedegradationofMC2LRbyUV,UVPH2O2process1MC2LRTable1Comparisonbetweenthedegradationparametersofkineticsmodels(pseudofirstorder)underdifferentprocessesKPmin-1R2UV010266018121UVPH2O20112380196873.2MC2LR15212gPL,H2O22mmolPL,pH=7120,UV,153100761503812519113WPcm2,3.MC2LR,KR22.2MC2LRTable2Comparisonbetweenthedegradationparametersofkineticsmodels(pseudofirstorder)underdifferentintensityofUVradiationUVPWcm-2KPmin-1R21531000112380196877615001062501975838125010373019841191130103460199803,,,MC2LRUV.UV153WPcm2,22min3UVPH2O2MC2LRFig.3EffectofdifferentintensityofUVradiationonthedegradationofMC2LRbyUVPH2O2processMC2LR93102%;UV19113WPcm2,22minMC2LR53185%,UV38125WPcm2,50min,MC2LR85145%.UVPH2O2,UV,,OH,MC2LR.,3,30minMC2LR,,,[14].UV19113153100WPcm2,MC2LRKUV:K=010007[UV]+010148(R2=019814)3.3H2O2MC2LR15212gPL,UV153WPcm2,H2O20123mmolPL,4.MC2LRt,KR23.UVPH2O2,H2O2OH,MC2LR.4,,H2O2,MC2LR.H2O23mmolPL,22min97122%.9542:UVPH2O22LR3H2O2MC2LRTable3Comparisonbetweenthedegradationparametersofkineticsmodels(pseudofirstorder)underdifferentinitialconcentrationofH2O2H2O2c0PmmolL-1KPmin-1R201000102660181211100010844019578210001123801968731000116640195424H2O2UVPH2O2MC2LRFig.4EffectofdifferentinitialconcentrationofH2O2onthedegradationofMC2LRbytheUVPH2O2process3,H2O20mmolPL3mmolPL,MC2LRK010266011664,H2O2UVPH2O2MC2LR,.Crittenden[15],,H2O2(2)(3),OH.,,H2O2.H2O20mmolPL3mmolPL,MC2LRKH2O2:K=010459[H2O2]+010315(R2=019924)3.4pHMC2LR15212gPL,UV153WPcm2,H2O22mmolPL,HClNaOHpH,pH111559160712051283113,5.pHMC2LRt,KR24.5pHUVPH2O2MC2LRFig.5EffectofpHvalueonthedegradationofMC2LRbyUVPH2O2process4pHMC2LRTable4Comparisonbetweenthedegradationparametersofkineticsmodels(pseudofirstorder)underdifferentinitialpHvaluepHKPmin-1R21115501048101955891600107640198227120011238019687512801135401974031130116290196465,pH3113,MC2LR,Kmax=011629;pH11155,MC2LR,Kmin=010481,3139.pH111553113,MC2LRKpH:K=-010137pH+0121(R2=019773),pHMC2LR,pHMC2LR;MC2LR.pH,HCO2-3CO2-3,OH,H2O2HO-2,OHH2O22[15],OH,.3.5MC2LRUV153WPcm2,H2O2064302mmolPL,MC2LR7611152122281330414gPL,6.MC2LRt,KR25.6MC2LRUVPH2O2MC2LRFig.6EffectofdifferentinitialconcentrationofMC2LRonthedegradationofMC2LRbytheUVPH2O2process5MC2LRTable5Comparisonbetweenthedegradationparametersofkineticsmodels(pseudofirstorder)underdifferentinitialconcentrationsofMC2LRMC2LRc0PgL-1KPmin-1R276110120600199751521201123801968722813010911019937304140105970196046,,MC2LR,MC2LR7611gPL,K=012060,30414gPL3.MC2LR,H2O2MC2LR,H2O2.MC2LR7611gPL30414gPL,MC2LRKMC2LR:K=-010006[MC2LR]+012