芬顿试剂和湿式过氧化氢氧化法处理乳化液废水研究

26820068ActaScientiaeCircumstantiaeVol.26,No.8Aug.,2006:(1968),,(),E2mail:[e-mail];3()Biography:TANGWenwei(1968),male,associateprofessor(Ph.D.),E2mail:[e-mail];3Correspondingauthor,,.2006.[J].,26(8):1265-1270TangWW,ZengXP,HuZH.2006.StudyofFentonsreagentandwethydrogenperoxideoxidationfortreatmentofemulsifiedwastewater[J].ActaScientiaeCircumstantiae,26(8):1265-12701,2,3,11.,2000922.,200092:2005210224:2006205212:2006206202:,COD50540mgL-1,H2O2/COD2.0,Fe2+/COD0.075,COD91%;,.,H2O2,(Fe2+50mgL-1),150COD82.4%;(H2O2/COD=0.05),120COD52.0%,.:;;;,COD:025322468(2006)0821265206:X703:AStudyofFentonsreagentandwethydrogenperoxideoxidationfortreatmentofemulsifiedwastewaterTANGWenwei1,ZENGXinping2,3,HUZhonghua11.DepartmentofChemistry,TongjiUniversity,Shanghai2000922.SchoolofLifeScienceandTechnology,TongjiUniversity,Shanghai200092Received24October2005;receivedinrevisedform12May2006;accepted2June2006Abstract:Fenton’sreagentwasappliedtotreatemulsifiedwastewateratroomtemperature.Theoptimalconditionsforthetreatmentwereinvestigated.Asaresult,whentheCODis50540mgL-1intheinflow,theoptimalparameterswere2.0and0.075forH2O2/COD(w/w)andFe2+/COD(w/w),respectively.TheCODcouldberemovedbyapproximately91%.Aninductiveperiodwasobservedintheprocess.Apparentkineticsoffirstorderwasusedtoexplainfastandslowoxidationprocess,respectively.Furthermore,theroleofH2O2wasstudiedinthewetairoxidationprocess,wheretheairairwasreplacedpartiallyorcompletelybyH2O2.Thedosageofferrousion(50mgL-1Fe2+)wassignificantlydecreasedduetotheadditionofH2O2;theremovalefficiencyforCODis82.4%at150.TheCODremovalreached52.0%at120byusingH2O2(H2O2/COD=0.05)astheinitiator,suggestinganeffectivelycatalyticoxidation.Keywords:Fenton’sreagent;hydrogenperoxide;wetairoxidation;emulsifiedwastewater;COD1(Introduction)(Fenton’sreagent)OH(Wallingetal.,1973;Linetal.,1998),.OH(2.80V),OH,(Tangetal,1997;Zazoetal.,2005).pH.,,,pH2.04.0.,(COD:5357074110mgL-1,BOD5/COD:0.0720.124).//()--,,,26.-,,,,.(Tangetal.,2003;,2004a;2004b),(wetairoxidation,WAO),,2.,,,,,.,H2O2,.2(Methods)2.11.1(1.N2,2.O2,3.,4.,5.,6.,7.,8.,9.,10.,11.,12.,13.)Fig.1ExperimentalequipmentofWetHydrogenPeroxideOxidation(1.N2,2.O2,3.Pressurereliefvalve,4.Inputgasvalve,5.Outputwatervalve,6.Condenser,7.Inputwatervalve,8.Stirrer,9.Autoclave,10.Thermocouple,11.ElectrilcCooker,12.PressureMetre,13.Contoller)FYX22a(2L),.,.(2).,,..,,.2.2.COD50540mgL-1,pH9.35.Fe2+FeSO47H20(),(30%)..2.3,,.Fe2+H2O2pH,1.1Table1OrthogonalexperimentconditionsoffentonsreagentoxidationH2O2/CODFe2+/CODpH11.00.053.022.00.106.033.00.159.0.250mL,200mL.pH,Fe2+,(100rmin-1),2h10mL.2.:pH2.03.04.06.07.09.35,Fe2+Fe2+/COD(,)010250.050.0750.100.1250.15,H2O2/COD(,)0.51.01.52.03.04.0,0.51.01.52.03.04.0h;,:pH,H2O2/COD2.0,Fe2+Fe2+/COD0.1,2h.400mL,Fe2+(Fe2+0102550100200mgL-1,50mgL-1),.,H2O2/COD2.0,,(25).,H2O2/COD0.05,,0.98MPa(25).200V,(90110130150170)500rmin-1,66218:1h2h10mL.2.4COD;pHpHS23DC();TOC(TOC2500,).2.5kCOD,(,1996).3(Results)3.13.1.12,,H2O2/CODpHFe2+/COD;k,H2O2/COD,COD,k,H2O2/COD2.0.Fe2+/COD0.1pH.pH3.0,,,pH2.5,pH.2(k2hCOD)Table2OrthogonalexperimentresultsoffentonsreagentoxidationH2O2/CODFe2+/CODpHCOD11.00.053.036.5%21.00.106.086.1%31.00.159.081.3%42.00.056.089.3%52.00.109.088.8%62.00.153.086.8%73.00.059.093.4%83.00.103.089.7%93.00.156.088.3%k168.073.171.0k288.388.287.9k390.585.587.8R22.515.116.93.1.2,2h,2.2COD(a.pH,b.Fe2+,c.H2O2,d.)Fig.2TheinfluenceofreactionconditiontoCODremovalrate(a.pHofinflux,b.throwingquantityofFe2+,c.throwingquantityofH2O2,d.reactiontime)762126pHCOD2a.,(H2O2/COD)2.0(Fe2+/COD)0.075,pH2.009.35COD,pH(9.35),,pH.COD2b.,(H2O2/COD)2.0,(Fe2+/COD)0.075COD,8919%,.COD2c.,(Fe2+/COD)0.075(H2O2/COD)2.0,COD(9110%),,1.5.COD2d.,(H2O2/COD)2.0(Fe2+/COD)0.075,,30min,COD1h,1.5h,--3,2h.3.2H2O2,2h,1h,3.3Fe2+Fig.3TheinfluenceofthrowingquantityofFe2+andtemperaturetoCOD(TOC)removalrate3a.,150,,Fe2+,CODTOC,Fe2+50mgL-1COD,82.4%,220(,2004a),CODTOC.,CODTOC.COD3b.,(90170),,130170.90COD76.4%,200COD(75.4%)(,2004a).H2O2H2O2-Fe2+.:H2O2/COD()5%,Fe2+50mgL-1,2h,120COD52.0%,,,180COD7.5%,.4(Discussion)4.1CODpH,,pH.,(Fe2+/COD)0.075,COD;,,,86218:,,.(H2O2/COD)2.0,1.5,,,.,COD,OH,.COD,,COD.,:dCdt=-kiClnCC0=-kit(1),ki,dC,COD(mgL-1),ln(C0/C)-t,ki.2d,4.,9,,2h.4ln(COD0/COD)tFig.4ln(COD0/COD)t4.2150,50mgL-1COD,220WAO,,CODTOC,;COD,,;,,.COD:,,,,.5%H2O2H2O2-Fe2+120,COD52.0%,,OH,,,WAO.5(Conclusions)1)COD50540mgL-1,H2O2/COD()2.0,Fe2+/COD()0.075,2hCOD91%,H2O2.2),--3.3),50mgL-1Fe2+150,COD82.4%,220,.(H2O2/COD=0.05)()120COD52.0%,.:(1969),,,,E2mail:[e-mail],Tel:[phone].:,.References:ChenK.1996.Experimentaldesignandanalysis[M].Beijing:Tsing-HuaUniversityPress,94102(inChinese)LinSS,GurolMD.1998.Catalyticdecompositionofhydrogenperoxideonironoxide:kinetics,mechanismsandimplications[J].EnvironmentalScience&Technology,32(10):14171423962126TangW,TassosS.1997.OxidationkineticsandmechanismsoftrihalomethanesbyFenton’sreagent[J].WaterResearch,31(5):11171125TangWW,ZengXP,ZhaoJF,etal.2003.Thestudyonthewetairoxidationofhighlyconcentratedemulsifiedwastewateranditskinetic[J].Sepa