Fenton试剂处理废水中各影响因子的作用机制陈传好

21320005　　　　　　ENVIRONMENTALSCIENCEVol.21,No.3May,2000Fenton*,,,,**(,　510640,E-mail:[e-mail]):Fenton,Fen-ton:[H2O2]=0.2mol·L-1、[Fe2+]=40mmol·L-1、85℃,60min、pH3.COD80%.Fenton.COD,,.:Fenton,,.:X703.5　:A　:0250-3301(2000)03-0093-04*　、(ProjectSup-portedbyTrans-CenturyTrainingProgrammeFounda-tionfortheTalentsbytheStateEducationCommission,NationalNaturalScienceFoundationofChina,num-bered.29877009,970507)**,.:(1974～),,.:1999-10-27TheMechanismsofAffectingFactorsinTreatingWastewaterbyFen-tonReagent*ChuanhaoChen,BoXie,YuanRen,ChaofeiWu,ChaohaiWei(CollegeofChemicalEngineering,SouthChinaUniversityofTechnology,Guangzhou　510640,ChinaE-mail:[e-mail])Abstract:Themechanismsofaffectingfactorsintreatingtoxicorganicwastewatersuchaswood-gluewastewa-terbyFentonreagentwerepreliminarilyinvestigated.Theoptimaloperatingconditionsdeterminedbyorthogo-nalexperimentsareasfollowing:[H2O2]=0.2mol·L-1,[Fe2+]=40mmol·L-1,85℃and60minatpH=3.Undertheseconditions,theCODremovalsareover80%formostexperiments.Furthermore,thedegradationabilityofFentonreagenttoorganiccompoundscanbeenhancedduetoultravioletlightandcomplexcompounds.ThecurvesbetweenaffectingfactorsandCODremovalswereobtained.Basedontheaboveresults,themecha-nismsofaffectingfactorsincomplexwastewaterareanalyzed,thekeyandcontrollingstepsofreactionareex-pounded,andthesuggestionforfurtherstudyisproposed.Keywords:Fentonreagent,hydrogenperoxide,wastewatertreatment.　　FentonFenton,-Fenton、-Fenton,、pH、、、,、、、、[1～6].、,,,Fenton,.1　,COD(CODCr)4000mg·L-1,、K-BR.,,NH4Cl,,,.、,.50ml300ml,DOI:10.13227/j.hjkx.2000.03.023pH,(H2O2),,COD,Fenton.2　2.1　FentonFe2+H2O2OH·,OH·,,.,[8、9、10],H2O2、Fe2+、441,2.1　(50ml)H2O2/mol·L-1Fe2+/mmol·L-1/℃/min10.1220603020.1632706030.2440809040.328085120　　,,H2O2COD,Fe2+,,.:[H2O2]0.2mol·L-1,[Fe2+]40mmol·L-1,85℃,60min.2.2　COD(1)pH　Fenton,,Fe2+H2O2OH·,Fe2+pH.pHCOD1.,pH3,pH3pHCOD,pH6,COD.Fenton,pHOH·,Fe(Ⅱ).pH3,H+,(4),Fe(Ⅲ)Fe(Ⅱ),.pHFe2+、Fe3+,Fenton.2　H2O2/mol·L-1FeSO4/mmol·L-1/℃/minCOD/%10.1220603059.820.1232706054.630.1240809057.940.12808512048.950.1620709061.260.16326012057.870.1640853061.280.1680806067.690.24208012077.7100.2432859079.4110.2440606069.5120.2480703069.3130.3220856084.7140.3232803062.1150.32407012079.9160.3280609074.0K1j/%55.3270.8565.5863.10K2j/%61.9563.4864.8369.10K3j/%73.9867.1466.3368.13K4j/%75.1464.7968.5766.01Rj/%19.827.373.746.001　pHCOD2　H2O2COD　　(2)H2O2　2,H2OCOD,.H2O2,H2O2,94　　　　　　21OH·;H2O2,H2O2,Fe2+Fe3+[k=53L·(mol·s)-1],Fe3+,H2O2OH·,H2O2COD.(3)(Fe2+)　Fe2+,Fe2+,H2O2,Fe2+,(1),,;Fe2+,H2O2Fe3+,.3Fe3+COD.3,Fe2+3mmol·L-1,Fe2+COD;Fe2+3mmol·L-1,Fe2+COD.Fe2+,.3　Fe2+COD(4)　4H2O270min,COD,;80min,COD.OH·.COD,.4　COD(5)　,;,,.COD5.,80℃,COD;80℃,COD.Fenton,,H2O2O2H2O.H2O2.5　COD6　、COD(6)、　Fenton,,COD.,(Fe+)Fe2+Fenton,COD(6).,COD10%,.3　FentonFenton,,Fenton(OH·),CO2、H2O.Walling(OH·).Fenton,OH·953　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　,,,.[7～10]::　　Fe2++H2O2→Fe3++OH-+OH(1):OH+Fe2+→Fe3++OH-(2)OH+H2O2→HO2+H2O(3)Fe3++H2O2→Fe2++HO2+H+(4)HO2+Fe3+-H+Fe2++O2(5)HO+R-H→R+H2O(6)HO+R-H→[R-H]++HO-(7):2HO→H2O2(8)HO2+HO2→H2O2+O2(9)Fe3++O-2→Fe2++O2(10)Fe3++HO2→Fe2++H++O2(11)HO2+Fe2+H+Fe3++H2O2(12)HO2+O-2H+H2O2+O2(13)O-2+Fe2+H+Fe3++H2O2(14)HO+R1-CH=CH-R2→R1-C(OH)H=CH-R2(15)　　FentonOH·.OH·,,、pH、.,OH·、Fe(Ⅲ),(),.,Fe(Ⅱ)H2O2,H2O-2,Fe(Ⅱ)-H2O2.Bossmann[7]Fe(Ⅱ).,,,.,Fenton.Huston[1]FentonOH·.4　FentonH2O2、Fe2+、,0.2mol/L、40mmol/L、85℃120min.Fenton,Fen-tonH2O2Fe2+OH·,、.1　HustonPLandPignatelloJJ.Reductionofper-chloroalkanesbyferrioxalate-generatedcarboxylatradi-calprecedingmineralizationbythephoto-Fentonreation.Environ.Sci.Technol.,1996,30(12):3457～3463.2　ArnoldSM,HickeyWJ,HarrisRF.DegradationofA-trazinebyFenton'sReagent:Conditionoptimizationandproductquantification.Environ.Sci.Technol.,1995,29(8):2083～2089.3　PignatelloJJandSunY.Completeoxidationofmeto-lachlorandmethylparathioninwaterbythephotoas-sistedFentonReation.WaterRes.,1995,29(8):1837～1844.4　PignatelloJJandBaehrK.Ferriccomplexesascatalystsfor“Fenton”Degradationof2,4-DandMetolachlorinsoil.Environ.Qual.,1994,23(2):265～370.5　PignatelloJJ.DarkandphotoassistedFe3+-catalyzeddegradationofchlorophenoxyherbicidesbyhydrogenperoxide.Environ.Sci.Technol.,1992,26(5):944～951.6　,,.Fenton.,1999,20(3):72～74.7　BossmannSH,OliverosE,GbSetal.Newevidencea-gainsthydroxylradicalsasreactiveintermediatesinthethermalandphotochemicallyenhancedFentonReac-tion.J.Phys.Chem.A,1998,102(28):5542～5550.8　ChenR,PignatelloJJ.RoleofquinoneintermediatesaselectronshuttleinFentonandPhotoassistedFentonoxi-dationsofaromaticcompounds.Environ.Sci.Technol.,1997,31(8):2399～2406.9　ZeppRG.Hydroxylradicalformationinaqueousreac-tions(pH3～8)ofIron(Ⅱ)withhydrogenperoxide:thePhoto-FentonReaction.Environ.Sci.Technol.,1992,26(3):313～319.10　KangC,SobkowiakA,SawyerDT.Iron(Ⅱ)-inducedgenerationofhydrogenperoxidefromdioxygen:induc-tionofFentonchemistryandketonizationofhydrocar-bons.Inorg.Chem.,1994,33(1):79～82.96　　　　　　21