Fenton氧化与吸附法联合处理焦化废水的研究李亚峰

　　:2004-12-08:(03-2-068):(1960-),,,,.:1671-2021(2005)04-0354-04Fenton李亚峰1,王春敏1,2,周红星2,王维军2(1.,110168;　2.,063000)　:为了寻求一种行之有效的焦化废水处理新技术.利用Fenton氧化预处理联合活性炭吸附后续处理,以焦化废水的COD为考察指标,通过研究H2O2投加量、pH值、反应时间、[Fe2+]/[H2O2](摩尔比)等因素对Fenton氧化预处理阶段处理效果的影响,确定Fenton氧化预处理阶段的操作条件;通过研究活性炭投加量、活性炭吸附时间、pH值等因素对后续活性炭吸附阶段处理效果的影响,确定活性炭吸附阶段的操作条件.实验表明,Fenton氧化-活性炭吸附联合工艺的最佳操作条件为:先在H2O2投加量为158mmol/L,[Fe2+]/[H2O2]=1∶10,初始pH=3的条件下Fenton氧化预处理30min,然后投加1g/L活性炭吸附处理30min.在最佳操作条件下,Fenton氧化-活性炭吸附联合工艺处理焦化废水取得了良好的效果,处理后焦化废水COD由1935mg/L降为46.4mg/L,去除率达到97.6%,为该工艺的工业化应用提供了实验依据,同时对其他工业废水的处理具有借鉴意义.:;Fenton;;COD:X703　　　:A　　　　　Fenton.,,,,,.,,,.,Fenton,,Fenton-,.1　1.1　HH-5COD,pHS-29A,DBJ-621.30%H2O2、FeSO4·7H2O、.,,,pH7.2,COD1935mg/L,、、,.1.2　(1)Fenton,PHS-29AH2SO4NaOHpH=3,,,30minCOD.(2)Fenton,,DBJ-621,20057214　()JournalofShenyangJianzhuUniversity(NaturalScience)　July　2005Vol.21,No.4,COD.2　2.1　Fenton(1)H2O2COD,FentonpH=3,[Fe2+][H2O2]1∶10,30min.,H2O2COD,1.　　1,H2O2,COD,CODH2O2.CODH2O2,COD,H2O2158mmol/L,COD.H2O2H2O2,·OH,COD;H2O2,H2O2,H2O2·OH[4]:H2O2+·OH※HO2·+H2O。,H2O2,Fe2+Fe3+,Fe3+,·OH.　1　H2O2COD　　(2)[Fe2+]/[H2O2]()CODH2O2158mmol/L,pH=3,30min,[Fe2+]/[H2O2]COD1.1　[Fe2+]/[H2O2]COD[Fe2+]/[H2O2]ρy(COD)/(mg·L-1)ρc(COD)/(mg·L-1)COD/%1∶20193524587.31∶15193523188.11∶10193519589.91∶51935173.7911∶31935235.887.8　　1,[Fe2+]/[H2O2],COD,[Fe2+]/[H2O2],[Fe2+]/[H2O2],COD.:Fenton,Fe2+,·OH;Fe2+,H2O2·OH,·OH[5];FentonFe2++H2O2※Fe3++·OH+OH-Fe2++·OH※Fe3++OH-Fe2+·OH·OH,.Fenton[Fe2+]/[H2O2].1,[Fe2+]/[H2O2]1∶10～1∶5,[Fe2+]/[H2O2]=1∶10.(3)pHCODH2O2158mmol/L,[Fe2+]/[H2O2]=1∶10,30min,pHCOD2.　2　pHCOD21:Fenton355　　　　2,pH3～4COD,pH=3COD,pHCOD,[6,7].Fen-ton,pH,Fe2+,;pH,·OH,Fe2+Fe3+[8],pHH2O2,.　3　COD　　(4)CODH2O2158mmol/L,[Fe2+]/[H2O2]=1∶10,pH=3,COD(3).　　3,Fenton,5minCOD81.7%,COD,30min,COD,30min.,Fenton:H2O2158mmol/L,[Fe2+]/[H2O2]=1∶10,pH=3,30min.COD1935mg/L195mg/L,89.9%.2.2　(1)COD,,COD,COD2.2　COD/(g·L-1)0.511.523COD/%94.497.697.99898.2　　2,,COD,1g/L,COD97.6%,COD46.4mg/L,,COD,1g/L.(2)COD,1g/L,COD3.3　COD/min1020306090COD/%869397.59898.1　　3,30minCOD,,,30min.(3)pHCOD,1g/L30min,CODpH4.4　pHCODpH3467810COD/%97.696.896.296.194.791.3　　4,,pH3,FentonpH3,pH.356　　()213　　(1)Fenton-:H2O2158mmol/L,[Fe2+]/[H2O2]=1∶10,pH=330min,1g/L30min.(2)Fenton-,COD1935mg/L46.4mg/L,,97.6%,,.:[1]　BossmannSH,OliverosE,GobS,etal.NewevidenceagainsthydroxylradicalsasreactiveintermediatesinthethermalandphotochemicallyenhancedFentonReac-Tion[J].Phys.Chem.A,1998,102(28):5542-5550.[2]　ChenR,PignatelloJJ.RoleofquinineintermediatesaselectronshuttleinFentonandPhotoassistedFentonoxidationsofaromaticcompounds[J].Environ.Sci.Tech-nol.,1997,31(8):2399-2406.[3]　ZeppRG.Hydroxylradicalformationinaqueousreac-tions(pH3～8)ofIron(Ⅱ)withhydrogenperoxide:thePhoto-FentonReaction[J].Environ.Sci.Tech-nol.,1992,26(3):313-319.[4]　VenkatadriR,PeterRw,HazardousWaste&Haz-ardousMaterials[J],1993,10(2):107-109.[5]　,,.Fenton[J].,2001,34(5):76-80.[6]　,.Fenton[J].,1994,13(3):26-34.[7]　,.Fenton[J].,2001,84(3):24-25.[8]　,.Fenton[J].,2000,21(3):94-96.[9]　,,,.PACIMBR[J].(),2004,20(2):143-146.StudyontheTreatmentofCokingWastewaterbyFenton-AdsorptionProcessLiYa-feng1,WangChun-min1,ZhouHong-xing2,WangWei-jun2(1.SchoolofMunicipalandEnvironmentalEngineering,ShenyangJianzhuUniversity,Shenyang,China110168;　2.CivilEn-gineeringDepartmentofTangshanUniversity,Tangshan,China063000)Abstract:Inordertofindaneffectivetreatmentprocessforcokingwastewater,thestudyonthetreatmentofcokingwastewaterbyFenton-adsorptionprocessiscarriedoutinthisarticle.Theeffectsofaffectingfac-torsonthetreatmentofcokingwastewater,suchasthedosageofH2O2,theproportionofFe2+andH2O2,pHvalueandreactiontimeinthestageofoxidationpretreatmentbyFentonreagentandonthedosageofactivatedcarbon,pHvalueandreactiontimeinthestageofactivatedcarbonadsorptionarediscussedintermsofchemicaloxygendemand(COD).ThentheoptimaloperatingconditionsofFentonoxidationcom-binedwithactivatedcarbonadsorptionprocessaredetermined,whichareasfollows:thedosageofH2O2is158mmol/L,theproportionofFe2+andH2O2is0.1,pHvalueis3andreactiontimeis30mininthestageofFentonoxidation;thedosageofactivatedcarbonis1g/Landadsorptiontimeis30mininthefollowingstageofactivatedcarbonadsorption.Undertheaboveoptimaloperatingconditions,CODofcokingwastewa-terisreducedto46.4mg/Lfrom1935mg/L,thatistosayCODremovalis97.6%,soFenton-adsorptionprocessisaneffectivemethodforthetreatmentofcokingwastewater,whichprovidesgoodexperimentalba-sisforthepracticalapplicationofthisprocessinthetreatmentofcokingwastewater,andwhichismeaning-fulforthetreatmentofotherkindsofwastewater.KeyWords:cokingwastewater,Fentonoxidation,adsorption,CODremoval21:Fenton357