Fenton试剂强化铁炭微电解预处理高浓有机废水李德生

Fenton李德生,　谭　磊,　王宝山,　徐东辉(兰州交通大学环境与市政工程学院,甘肃兰州730070)　　　:　研究了Fenton试剂法强化铁炭微电解工艺对高浓度难生化有机废水的预处理效果。结果表明,当原水COD在9000mg/L、铁炭微电解反应时间为100min、pH值为2.2时,铁炭微电解对原水COD的去除率45%;铁炭微电解出水再投加240mg/L的H2O2(30%)进行Fenton试剂法处理,常温下反应50min对原水COD的去除率可提高到75%以上。铁炭微电解+Fenton试剂联合工艺的除污效果好、运行稳定、成本低廉,适宜对高浓度难生化有机废水的预处理。　　:　废水处理;　化工废水;　高浓度难生化有机废水;　铁炭微电解;　Fenton试剂:X703.1　　:C　　:1000-4602(2006)17-0081-04StudyonPretreatmentofHighConcentrationandRefractoryOrganicWastewaterbyFerric-CarbonMicro-electrolysisandFentonReagentLIDe-sheng,　TANLei,　WANGBao-shan,　XUDong-hui(SchoolofEnvironmentalandMunicipalEngineering,LanzhouJiaotongUniversity,Lanzhou730070,China)　　Abstract:　Thecombinedtechniquesofferric-carbonmicro-electrolysisandFentonreagentfortreatinghighconcentrationandrefractoryorganicwastewaterwerestudied.ResultsshowthatwhentheCODininfluentis9000mg/L,thereactiontimeforthemicro-electrolysisisapproximately100minandpHis2.2,theremovalrateofCODisabove45%.WhenthedosageofH2O2(30%)is240mg/Landthereactiontimeis50minutes,theremovalrateofCODisraisedtoabove75%inrawwastewaterbyFentonreagen.tFerric-carbonmicro-electrolysisandFentonreagenttechniquesarehighlyefficientinremovalofpollutants,stableinoperationandlowincost,thusaresuitablefortreatmentofhighconcen-trationandrefractoryorganicwastewater.　　Keywords:　wastewatertreatment;　chemicalindustrialwastewater;　highconcentrationandre-fractoryorganicwastewater;　ferric-carbonmicro-electrolysis;　Fentonreagent　　:(ZS021-A25-021-G);　“”　　,、。、、[14],。,Fenton[5]。Fenton,。81第22卷　第17期2006年9月　　　　　　　　　　　　中国给水排水CHINAWATERWASTEWATER　　　　　　　　　　　　　Vo.l22No.17Sep.20061　试验方法1.1　。,,,、、、、,。1。1　Tab.1　WastewaterqualityCOD/(mgL-1)B/CpHSS/(mgL-1)6580～113500.181.5～1028～1581.2　1。1　Fig.1　Schematicdiagramofexperimentalset-up4m,400mm,4,1、2、3、4m,。,2.5∶1,、[6]。Fenton,××=2m×0.5m×0.6m,H2O2,,,,。1.3　COD:;BOD5:;pH:;SS:;Fe2+:。2　结果与讨论2.1　2.1.1　COD9850mg/L、pH2.5,2。2　Fig.2　InfluenceofreactiontimeonCODremovalbyferriccarbonmicro-electrolysis2,100min,COD,50%。,。100min。2.1.2　pHpH[7],,COD7280mg/L、100min,pH,3。3　pHFig.3　InfluenceofpHonCODremovalbyferriccarbonmicro-electrolysis3,pH,pHCOD,pH6COD20%。pH3。pHFe2+,pHFe2+。,Fe2+pH:pH2.5Fe2+≥100mg/L,pH=6Fe2+0.1mg/L。82第17期　　　　　　　　　　　　　　　　　　　中国给水排水　　　　　　　　　　　　　　　　　　第22卷2.2　Fenton2.2.1　Fe2+Fe2+Fenton,Fenton。80mg/LH2O2(30%),Fe2+Fenton,4。4　Fe2+FentonFig.4　InfluenceofFe2+concentrationonCODremovalbyFentonreagent4,Fe2+150mg/L,Fe2+COD,Fe2+250mg/L,COD。Fe2+H2O2,H2O2Fe2+,Fe2+,Fe2+,,,[8]。Fe2+150～250mg/L。pHFe2+,pH2.2,COD50%,Fe2+180mg/L。2.2.2　H2O2Fenton[8、9],pH2.2pH5,pH。COD5140mg/L、50min,H2O2(30%)Fenton,5。5,H2O2,COD;240mg/L,COD。Fen-tonH2O2(30%)240mg/L。5　H2O2FentonFig.5　InfluenceofdosageofH2O2onCODremovalbyFentonreagent2.2.3　COD4580mg/L、H2O2(30%)240mg/L,,6。6　FentonFig.6　InfluenceofreactiontimeonCODremovalbyFentonreagent6,COD,50minCOD(70%),Fenton50min。2.2.4　,30%H2O2240mg/L、50min,,7。7　FentonFig.7　InfluenceoftemperatureonCODremovalbyFentonreagent83第17期李德生,等:Fenton试剂强化铁炭微电解预处理高浓有机废水第22卷,。Fenton,,[10、11]。7,,COD,,(20℃)。2.3　+Fenton、,,15dCODFentonCOD,8。8　+FentonFig.8　EffectofCODremovalbycombinedprocessofferriccarbonmicro-electrolysisandFentonreagent8,Fenton,COD45%75%,B/C0.35。+Fen-ton、,。3　结论①　pH2.2、100min,COD45%,Fe2+180mg/L,FentonFe2+。②　Fenton,50min、H2O2(30%)240mg/L,COD60%。③　+Fenton,COD75%,。、,。:[1]　,,,.[J].,2001,17(12):66-68.[2]　,,.[J].,2003,29(2):68-70.[3]　,.[J].,2004,5(10):72-75.[4]　JohnsonTL.Kineticsofhalogenatedorganiccompounddegradationbyironmetal[J].EnvironSciTechnol,1996,30:2634-2640.[5]　Ghizlainekaichouh,OturanN,OturanMA.DegradationoftheherbicideimazapurbyFentonreactions[J].Envi-ronChemLett,2004,2:31-33.[6]　,.[J].,2003,19(10):58-60.[7]　,.[J].,2001,29(11):1294-1298.[8]　DelaatJ,GallardH,AncelinS,etal.ComparativestudyofoxidationofatrazineandacetonebyH2O2/UV,Fe(Ⅲ)/UV,Fe(Ⅲ)/H2O2/UVandFe(Ⅱ)orFe(Ⅲ)/H2O2[J].Chemospere,1999,39(15):2693-2706.[9]　,.Fenton[J].,2005,24(3):27-29.[10]　BoyeB,FarniaG,SandonaG.Removalofvegetaltan-ninsfromwastewaterbyelectroprecipitationcombinedwithelectrogeneratedFentonoxidation[J].JApplElec-trochem,2005,35:369-374.[11]　,,.Fenton[J].,2005,21(3):41-43.:[phone]E-mail:[e-mail]:2006-03-1784第17期　　　　　　　　　　　　　　　　　　　中国给水排水　　　　　　　　　　　　　　　　　　第22卷