Fenton混凝法处理焦化废水的试验研究王春敏

73Vol.7,No.320063TechniquesandEquipmentforEnvironmentalPollutionControlMar.2006Fenton-王春敏1,2　李亚峰1*　周红星2　陈　健1　王维军2(1.,110168;2.,063000)　　Fenton-,FentonH2O2、pHCOD,。,Fenton-,COD97.5%,。　Fenton　　　TU992.03　　　A　　　1008-9241(2006)03-0088-04StudyontreatmentofcokingwastewaterbyFenton-coagulationprocessWangChunmin1,2　LiYafeng1　ZhouHongxing2　ChenJian1　WangWeijun2(1.SchoolofMunicipalandEnvironmentalEngineering,ShenyangJianzhuUniversity,Shenyang110168;2.DepartmentofCivilEngineering,TangshanCollege,Tangshan063000)Abstract　ThetreatmentofcokingwastewaterbyFenton-coagulationprocessisstudied.ThefactorshavingeffectsonCODremovalofcokingwastewaterbyFenton-coagulationprocess,suchasH2O2dosageinthestageofFentonoxidation,coagulantdosageandpHinthefollowingcoagulationstage,arediscussed.Thentheoptimalop-eratingconditionsaredeterminedunderwhichCODremovalofcokingwastewaterisupto97.5%.TheresultsshowthatFenton-coagulationprocessisaneffectivemethodforthetreatmentofcokingwastewater,whichprovidesgoodexperimentalbasisforthepracticalapplicationofthisprocessinthetreatmentofcokingwastewater.Keywords　Fentonreagent;coagulation;cokingwastewater:2004-12-20;:2005-03-15:(1971～),,,,。E-amil:[e-mail]*,E-amil:[e-mail]　　,、、,,。,,,。Fenton(H2O2+Fe2+)H2O2Fe2+OH[1],,,,Fenton。Fenton,,。1　1.1　HH-5COD(),PHS-29A();DBJ-621()。30%H2O2()、FeSO47H2O()()。,,,pH7.2,COD1935mg/L,、、,。1.2　1.2.1　Fenton氧化实验,PHS-29AH2SO4NaOHpH=3,FeSO4H2O2,,30minCOD。3:Fenton-1.2.2　混凝实验Fenton,pH,Fe2(SO4)3,150r/min1min,50r/min5min,30min,COD。2　2.1　Fenton2.1.1　H2O2投加量对Fenton氧化处理焦化废水效果的影响,FentonpH=3,[Fe2+][H2O2]1∶10,30min。,H2O2COD,1。1　H2O2CODFig.1　EffectofH2O2dosageonCODremoval1,CODH2O2,COD。H2O240mmol/L,COD72.1%;H2O2100mmol/L,COD84%,11.9%;H2O2158mmol/L,COD89.9%,H2O2,COD。,H2O2H2O2,Fenton。H2O2H2O2,OH,COD;H2O2,H2O2,H2O2OH:H2O2+OH→HO2+H2O,H2O2,Fe2+Fe3+,Fe3+,OH。2.1.2　[Fe2+]/[H2O2](摩尔比)对Fenton氧化处理焦化废水效果的影响H2O2158mmol/L,pH=3,30min,[Fe2+]/[H2O2]COD1。1　[Fe2+]/[H2O2]CODTable1　EffectofproportionofFe2+andH2O2onCODremoval[Fe2+]/[H2O2]COD(mg/L)COD(mg/L)COD(%)1∶20193524587.31∶15193523188.11∶10193519589.91∶51935173.7911∶31935235.887.81,[Fe2+]/[H2O2],COD,[Fe2+]/[H2O2],[Fe2+]/[H2O2],COD。2:Fenton,Fe2+,OH;Fe2+,H2O2OH,OH:2OH→H2O2H2O2。Fenton:Fe2++H2O2→Fe3++OH+OH-;Fe2++OH→Fe3++OH-Fe2+OHOH,。Fenton[Fe2+]/[H2O2]。1,[Fe2+]/[H2O2]1∶10～1∶5,[Fe2+]/[H2O2]=1∶10。2.1.3　pH值对Fenton氧化处理焦化废水效果的影响H2O2158mmol/L,[Fe2+]/897[H2O2]=1∶10,30min,pHCOD2。2　pHCODFig.2　EffectofpHonCODremoval2,pH3～4COD,pH=3COD,pH,COD,[2,3]。Fenton,pH,Fe2+,;pH,OH,Fe2+Fe3+,pHH2O2,。2.1.4　反应时间对Fenton氧化处理焦化废水效果的影响H2O2158mmol/L,[Fe2+]/[H2O2]=1∶10,pH=3,COD3。3　CODFig.3　EffectofreactiontimeonCODremoval3,Fenton,5minCOD81.7%,COD,30min,COD90%,30min。,Fenton,H2O2158mmol/L,[Fe2+]/[H2O2]=1∶10,pH=3,30min,COD89.9%,COD195mg/L,,,。,158mmol/LH2O2,,。2.2　Fenton-1,Fenton,H2O240mmol/L,COD72.1%;H2O240mmol/L80mmol/L,COD10.5%。[4,5],Fenton,Fenton。2.2.1　氧化阶段H2O2投加量对Fenton-混凝处理效果的影响[6],FentonFenton([Fe2+]/[H2O2],H2O2)。,H2O2Fenton-,2(:[Fe2+]/[H2O2]=1∶10,pH3,30min;Fe2(SO4)3600mg/L,pH6.5)。2　H2O2Fenton-CODTable2　EffectofH2O2dosageinoxidationstageontotalCODremovalbyFenton-coagulationprocessH2O2(mmol/L)20304060COD(%)85.293.997.597.72,H2O240～60mmol/L,Fenton-,,40mmol/L。,Fenton:H2O240mmol/L,[Fe2+]/[H2O2]=1∶10,pH3,30min。2.2.2　混凝阶段Fe2(SO4)3投加量对Fenton-混凝处理效果的影响,903:Fenton-Fenton,pH6.5,Fe2(SO4)3Fenton-,3。3　Fe2(SO4)3Fenton-CODTable3　EffectofFe2(SO4)3dosageincoagulationstageontotalCODremovalbyFenton-coagulationprocess(mg/L)200400500600800COD(%)87.891.894.497.597.33,Fe2(SO4)3,COD,600～800mg/L,Fe2(SO4)3600mg/L。2.2.3　混凝阶段pH值对Fenton-混凝处理效果的影响Fenton,Fe2(SO4)3600mg/L,pHFenton-,4。4　pHFenton-CODTable4　EffectofpHincoagulationstageontotalCODremovalbyFenton-coagulationprocesspH2466.579COD(%)85.889.596.697.596.387.34,pH6～7,CODCOD,pH6.5,pH6.5。,Fenton-,COD97.5%,COD48.4mg/L,。,Fenton-、,Fenton-,、。3　　(1)Fenton,Fenton-,:H2O240mmol/L,[Fe2+]/[H2O2]=1∶10,pH=3,30minFenton;pH6.5,600mg/LFe2(SO4)3。(2),COD97.5%,COD48.4mg/L,,,,。[1]BossmannS.H.,OliverosE.,GobS.,eta.lNewevidenceagainsthydroxylradicalsasreactiveintermediatesinthethermalandphotochemicallyenhancedFentonreaction.Phys.Chem.A,1998,102(28):5542～5550[2],.Fenton.,1994,13(3):26～34[3],,.Fenton.,2001,84(3):24～25[4],.Fenton-.,2004,24(4):39～41[5],,.Fenton-.(),2003,42(3):440～444[6]./Fenton.(),2003,31(4):59～6391