Fenton混凝法处理焦化废水的试验研究

73Vol.7,No.320063TechniquesandEquipmentforEnvironmentalPollutionControlMar.2006Fenton21,213212(1.,110168;2.,063000)Fenton2,FentonH2O2pHCOD,,Fenton2,COD97.5%,FentonTU992103A100829241(2006)0320088204StudyontreatmentofcokingwastewaterbyFenton2coagulationprocessWangChunmin1,2LiYafeng1ZhouHongxing2ChenJian1WangWeijun2(1.SchoolofMunicipalandEnvironmentalEngineering,ShenyangJianzhuUniversity,Shenyang110168;2.DepartmentofCivilEngineering,TangshanCollege,Tangshan063000)AbstractThetreatmentofcokingwastewaterbyFenton2coagulationprocessisstudied.ThefactorshavingeffectsonCODremovalofcokingwastewaterbyFenton2coagulationprocess,suchasH2O2dosageinthestageofFentonoxidation,coagulantdosageandpHinthefollowingcoagulationstage,arediscussed.Thentheoptimalop2eratingconditionsaredeterminedunderwhichCODremovalofcokingwastewaterisupto97.5%.TheresultsshowthatFenton2coagulationprocessisaneffectivemethodforthetreatmentofcokingwastewater,whichprovidesgoodexperimentalbasisforthepracticalapplicationofthisprocessinthetreatmentofcokingwastewater.KeywordsFentonreagent;coagulation;cokingwastewater:2004-12-20;:2005-03-15:(1971),,,,E2amil:[e-mail]3,E2amil:[e-mail],,,,,,Fenton(H2O2+Fe2+)H2O2Fe2+OH[1],,,,FentonFenton,,11.1HH25COD(),PHS229A();DBJ2621()30%H2O2()FeSO47H2O()(),,,pH7.2,COD1935mg/L,,1.211211Fenton,PHS229AH2SO4NaOHpH=3,FeSO4H2O2,,30minCOD(SO4)3,150r/min1min,50r/min5min,30min,COD22.1Fenton2.1.1H2O2Fenton,FentonpH=3,[Fe2+][H2O2]110,30min,H2O2COD,11H2O2CODFig.1EffectofH2O2dosageonCODremoval1,CODH2O2,CODH2O240mmol/L,COD72.1%;H2O2100mmol/L,COD84%,11.9%;H2O2158mmol/L,COD89.9%,H2O2,COD,H2O2H2O2,FentonH2O2H2O2,OH,COD;H2O2,H2O2,H2O2OH:H2O2+OHHO2+H2O,H2O2,Fe2+Fe3+,Fe3+,OH2.1.2[Fe2+]/[H2O2]()FentonH2O2158mmol/L,pH=3,30min,[Fe2+]/[H2O2]COD11[Fe2+]/[H2O2]CODTable1EffectofproportionofFe2+andH2O2onCODremoval[Fe2+]/[H2O2]COD(mg/L)COD(mg/L)COD(%)120193524587.3115193523188.1110193519589.9151935173.791131935235.887.81,[Fe2+]/[H2O2],COD,[Fe2+]/[H2O2],[Fe2+]/[H2O2],COD2:Fenton,Fe2+,OH;Fe2+,H2O2OH,OH:2OHH2O2H2O2Fenton:Fe2++H2O2Fe3++OH+OH-;Fe2++OHFe3++OH-Fe2+OHOH,Fenton[Fe2+]/[H2O2]1,[Fe2+]/[H2O2]11015,[Fe2+]/[H2O2]=1102.1.3pHFentonH2O2158mmol/L,[Fe2+]/98[H2O2]=110,30min,pHCOD22pHCODFig.2EffectofpHonCODremoval2,pH34COD,pH=3COD,pH,COD,[2,3]Fenton,pH,Fe2+,;pH,OH,Fe2+Fe3+,pHH2O2,2.1.4FentonH2O2158mmol/L,[Fe2+]/[H2O2]=110,pH=3,COD33CODFig.3EffectofreactiontimeonCODremoval3,Fenton,5minCOD81.7%,COD,30min,COD90%,30min,Fenton,H2O2158mmol/L,[Fe2+]/[H2O2]=110,pH=3,30min,COD8919%,COD195mg/L,,,,158mmol/LH2O2,,2.2Fenton21,Fenton,H2O240mmol/L,COD72.1%;H2O240mmol/L80mmol/L,COD10.5%[4,5],Fenton,Fenton2.2.1H2O2Fenton2[6],FentonFenton([Fe2+]/[H2O2],H2O2),H2O2Fenton2,2(:[Fe2+]/[H2O2]=110,pH3,30min;Fe2(SO4)3600mg/L,pH6.5)2H2O2Fenton2CODTable2EffectofH2O2dosageinoxidationstageontotalCODremovalbyFenton2coagulationprocessH2O2(mmol/L)20304060COD(%)85.293.997.597.72,H2O24060mmol/L,Fenton2,,40mmol/L,Fenton:H2O240mmol/L,[Fe2+]/[H2O2]=110,pH3,30min2.2.2Fe2(SO4)3Fenton2,09(SO4)3Fenton2,33Fe2(SO4)3Fenton2CODTable3EffectofFe2(SO4)3dosageincoagulationstageontotalCODremovalbyFenton2coagulationprocess(mg/L)200400500600800COD(%)87.891.894.497.597.33,Fe2(SO4)3,COD,600800mg/L,Fe2(SO4)3600mg/L2.2.3pHFenton2Fenton,Fe2(SO4)3600mg/L,pHFenton2,44pHFenton2CODTable4EffectofpHincoagulationstageontotalCODremovalbyFenton2coagulationprocesspH2466.579COD(%)85.889.596.697.596.387.34,pH67,CODCOD,pH6.5,pH6.5,Fenton2,COD97.5%,COD48.4mg/L,,Fenton2,Fenton2,3(1)Fenton,Fenton2,:H2O240mmol/L,[Fe2+]/[H2O2]=110,pH=3,30minFenton;pH6.5,600mg/LFe2(SO4)3(2),COD97.5%,COD48.4mg/L,,,,[1]BossmannS1H1,OliverosE1,GobS1,etal.NewevidenceagainsthydroxylradicalsasreactiveintermediatesinthethermalandphotochemicallyenhancedFentonreaction.Phys.Chem.A,1998,102(28):55425550[2],.Fenton.,1994,13(3):2634[3],,.Fenton.,2001,84(3):2425[4],.Fenton2.,2004,24(4):3941[5],,.Fenton2.(),2003,42(3):440444[6]./Fenton.(),2003,31(4):596319中国城镇水网