1铁屑炭反应器混凝沉淀处理电镀废水

276()Vo1.27,No.6200012JournalofHunanUniversity(NaturalSciencesEdition)Dec.2000:100022472(2000)0620109204ö2X1,2,3(1.,410082;2.,410007;3.,411105):ö24m3öhLL,CrCr6+99%,95%,(GB8978296),L,L:ö;;:X52:AStudyontheTreatmentofElectroplatingWastewaterbyReactorofIronöCarbon2CoagulationandPrecipitationProcessWUHui2ying1,HUANGSheng2,SHUCai2tao3(1.CollegeofCivilEngineering,HunanUniv,Changsha410082,China;2.TheIndustrialAssociationofEinvironmentalProtectioninHunanProvince,Changsha410007,China;3.TheMechanicalFactoryofJiangnu,XiangTan411105,China)Abstract:Aschemebasedonthereactorofironöcarbon2coagulationandprecipitationprocesswasadoptedtotreatthemixedelectroplatingwastewaterwithcapacityoffourcubicmetersperhour.Themechanismofreactorandtechnologicalconditionwasstudied.ThetreatmentresultsshowedthattheremovalratiosoftotalCrandCr6+exceeded99%,andtheremovalratiosofothermetal2ionsexceeded95%,theefficiencyisgoodtomeettherequirementofTheNationalStandardofIntegratedWastewaterDischarge(GB8978296),thereisnosecondpollution.Comparedwithtraditionalchemicaltechnologytheschemehastheadvantagesofsimpleprocess,lessareaandcost,andconvenientoperation.X:2000201204:(1967-),,,.Keywords:reactorofironöcarbon;coagulationandprecipitation;electroplatingwastewater,,,,;L,,ö2Lö,L,L1ö,,1L4m3öhLö,L,,11,L22.1ö,,[1,2]L,,,,,,,,,,,,[2,3]L:Fe:011()2000Fe-2eFe2+E0(Fe2+öFe)=-0.44V(1)C:2H++2e2[H]H2E0(H+öH2)=0.00V(2)O2+2H2O+4e2OH-E0(O2öOH-)=0.41V(3)O2+4H++4e2H2OE0(O2öH2O)=1.22V(4),Fe2+,,Fe2+,Fe3+,:6Fe2++Cr2O2-7+14H+2Cr3++6Fe3++7H2O(5)H+,pH,,Fe3+;,,,,[1,4]L,,FeSO4ö,ö,,Fe2+Cr6+L2.2LpH,L3045min,pH35,QCr6+100mgöl,QNi2+30mgöl,QCu2+80mgöl,QZn2+30mgöl,L,LL,;,,,23L,pH5,,pH,Ca(OH)2,L2.3,:QCr6+0.5mgöl,QNi2+1mgöl,QCu2+1mgöl,QZn2+5mgölLö2,,1L1mgölQCrQCr6+QCu2+QNi2+QZn2+9.398.816.376.480.2210.1592.3256.1240.5723.470.0310.0610.020.020.0100.0110.0840.2240.0220.072ö%99.799.399.999.995.593.196.496.396.197.91.50.50.51.02.0,,,1116:ö2L,CrCr6+99%,95%,GB8978296,L2.4,,L,L[5],,,,,LL38000m3,6,2.8L7280,0.91öm3,25%L41)ö,,,L,L2)ö,CrCr6+99%,95%,GB8978296,L,,,,L3),,,,L:[1].[J].,1994,113(2):43-49.[2].2[J].,1993,111(3):3-6.[3],,.2SBR[J].,1998,119(3):54-57.[4],,.ö2[J].,1998,118(4):220-223.[5],.Cr3+[J].,1992,177(7):18.211()2000