Fenton试剂处理咖啡因亚硝化废水朱兆友

　29320086　()JournalofQingdaoUniversityofScienceandTechnology(NaturalScienceEdition)Vol.29No.3Jun.2008　　　:1672-6987(2008)03-0217-03Fenton,(,266042)　:将经蒸发工艺处理后的咖啡因亚硝化废水采用Fenton(Fe2++H2O2)试剂深度处理,考察了反应时间、反应温度、pH值、试剂投加量及试剂配比对CODcr去除率的影响。结果表明,反应时间90min,反应温度90℃,pH值3.0,H2O2浓度0.24mol·L―1,Fe2+浓度40mmol·L―1时,CODcr去除率达到94.9%以上,达到废水排放标准。:咖啡因亚硝化废水;Fenton试剂;COD值:X703　　　:ATreatmentofCaffeineNitrousWastewaterbyFentonReagentZHUZhao-you,MAYi-xin(CollegeofChemicalEngineering,QingdaoUniversityofScienceandTechnology,Qingdao266042,China)Abstract:ThecaffeinenitrouswastewaterwastreatedbyFentonreagent(Fe2++H2O2).Theeffectsofreactiontime,reactiontemperature,pH,H2O2andFe2+dosagesonremovalefficiencyofCODcrwereexamined.Theresultsshowedthattheremovalef-ficiencyofCODcrfromcaffeinenitrouswastewaterwasmorethan94.9%undertheconditionsofreactiontime90min,reactiontemperature90℃,pH3.0,Fe2+dosage40mmol·L1andH2O2dosage0.24mol·L1.Keywords:caffeinenitrouswastewater;Fentonreagent;COD:2007-06-07:(1961～),,.　　(1,3,7-),,。,[1]。,1900Traube、[2-3]。。NaCl、Na2SO4、、。,,“ABR+SBR”EMO[4],,,CODcr。,(AOPs)[5-8]。AOPs,Fenton、、。,,CODcr35700mg·L11800mg·L1。,Fenton。1　1.1　HH-6;;;。()29,;、、、30%H2O2、、、,。1.2　CODcr35700mg·L1,。,NaCl、Na2SO4,CODcr1800mg·L1,pH8。,36%～38%pH,,FeSO4,H2O2,,CODcr,Fenton。2　2.1　pHCODcrFenton,,Fe2+H2O2·OH。pH2～6,CODcr,,pH。H2O20.22mol·L1,Fe2+0.04mol·L1、85℃、85min,pH1.0～8.0,1。1　pHCODcrTable1　TheinfluenceofpHonCODcrremovalefficiencypHCODcr/(mg·L-1)CODcr/%1437.875.682316.382.433141.392.154266.485.205763.457.5961012.343.7671341.225.4981489.317.261,pH3.0,CODCr,pH3.0。Fenton[9],pH·OH,Fe(Ⅱ);pH,H+,Fe(Ⅲ)Fe(Ⅱ),。pHFe2+、Fe3+,Fen-ton。2.2　Fe2+CODcrFeSO4·7H2O(·OH)。pH3.0,H2O20.22mol·L1,85℃,85min,Fe2+CODcr,1。1　Fe2+CODcrFig.1　TheeffectofFe2+concentrationonCODcrremovalefficiency1,Fe2+,CODcr,,Fe2+40mmol·L1,CODcr92.2%。Fe2+,Fe2+,H2O2·OH,·OH,CODcr;Fe2+,H2O2,O2[10],CODcr。2.3　H2O2CODcrFenton。pH3.0,Fe2+40mmol·L1,85℃,85min,H2O2CODcr,2。2,H2O2,CODcr,,H2O20.24mol·L1,CODcr93.9%。Fe2+-H2O2:Fe3++HO2·Fe2++O2+H+·OH+H2O2H2O+HO2·HO2·O2+H+218　3　　:FentonO2·+H2O2O2+OH-H2O2,,H2O2,·OH,·OH,CODcr;H2O2,,H2O2,O2,H2O2,Fe2+Fe3+,Fe3+,H2O2·OH,H2O2CODcr。2　H2O2CODcrFig.2　TheeffectofH2O2concentrationonCODcrremovalefficiency2.4　CODcrpH3.0,FeSO4·7H2O(Fe2+40mmol·L1),H2O2(0.24mol·L1),,85℃。75,85,95,105,115min,CODcr,3。3　CODcrFig.3　TheeffectofreactiontimeonCODcrremovalefficiencyFenton,。3,,CODcr,CODcr,。Fenton[11],·OH·OHFenton,,·OH,,,·OH,CODcr[12]。,90min。2.5　CODcr,;,,。pH3.0,Fe2+40mmol·L1,H2O20.24mol·L1,90min,CODcr。CODcr4。,CODcr,90℃,CODcr94.9%。,·OH,·OH,CODcr;H2O2O2H2O,·OH,CODcr。4　CODcrFig.4　TheeffectoftemperatureonCODcrremovalefficiency3　　,Fenton,:H2O20.24mol·L1,90℃,Fe2+40mmol·L1,90min,pH3.0,CODcr94.9%,CODcr85～92mg·L1,。(下转第222页)219()29　　1,,0.0634720.029874。3　　,Packie,,1.431442、0.477713,0.063472、0.029874,0.997288、0.999521。,Packie。　　　[1]PackieJW.Distillationequipmentintheoilrefiningindustry[J].AICHETransactions,1941,40(2):37-51.[2]BagajewiczM,JiS.Rigorousprocedureforthedesignofconventionaltmosphericcrudefractionationunits.PartI:Targeting[J].IndEngChemRes,2001,40(2):617-626.[3],,.[J].,2003,27(4):209-213.[4]BagajewiczM,SotoJ.Rigorousprocedureforthedesignofconventionalatmosphericcrudefractionationunits.PartII:Heatexchangernetwork[J].IndEngChemRes,2001,40(2):627-634.[5]WatkinsRN.Petroleumrefinerydistillation[M].GulfPub-lishingCompany:Houston,1979.[6]LiebmannK,DholeVR.Integratedcrudedistillationdesign[J].ComputerschemEngng,1995,19(Suppl):S119-S124.[7]LiebmannK.Integratedcrudeoildistillationdesign[D].ManchesterUK:UniversityofManchesterInstituteofSci-ence&Technology(UMIST),1996.[8]LiebmannK,DholeV.R,JobsonM.Integrateddesignofaconventionalcrudeoildistillationtowerusingpinchanalysis[J].TransIChemE,1998,76(3):335-347.[9]BagajewiczM.Energysavingshorizonsfortheretrofitofchemicalprocess:applicationtocrudefractionationunits[J].Computers&ChemicalEngineering,1998,23(1):1-9.[10]BagajewiczM.Onthedesignflexibilityofatmosphericcrudefractionationunits[J].ChemEngComm,Industrial&EngineeringChemistryResearch,1998,21:111-136.[11]JiS,BagajewiczM.Designofcrudefractionunitswithpre-flashingorprefraction:energytargeting[J].Industrial&EngineeringChemistryResearch,2002,41(12):3003-3011.[12]JiS,BagajewiczM.Designofcrudedistillationplantswithvacuumunits.I.TargetingIndEngChem[J].Res(Indus-trial&EngineeringChemistryResearch).2002,41(24):6094-6099.[13]JiS,BagajewiczM.Designofcrudedistillationplantswithvacuumunits.II.Heatexchangernetworkdesign[J].In-dustrial&EngineeringChemistryResearch,2002,41(24):6100-6106.[14]RajSharma,Anurag,Jindal,DineshMandawala,etal.De-sign/retrofittargetsofpump-aroundrefluxesforbetteren-ergyintegrationofacrudedistillationcolumn[J].IndEngChemRes,1999,38(6):2411-2417.[15]GadallaM.Retrofitdesignofheat-integratedcrudeoildis-tillationsystem[D].Manchester,UK,:PhDthesis,UMIST,2003.[16]GadallaM,JobsonM,SmithR.Optimizationofexistingheat-integratedrefinerydistillationsystems[J].TransIchemE,2003,81(1):147-152.[17]GadallaM,JobsonM,SmithR.Increasecapacityandde-creaseenergyforexistingrefinerydistillationcolumns[J].ChemicalEngineeringProgress(CEP),2003,99(4