非均相类Fenton试剂处理焦化废水的研究陈敏

非均相类Fenton试剂处理焦化废水的研究陈　敏,许韵华,晋丽叶,杨　琳(北京交通大学理学院,北京100044):Fe3+33,H2O2,,Fe3+。,,、、pHCODCr。:1.5g,H2O22%,pH5,,CODCr95%。:;;Fenton;:X703　:A　:0253-4320(2006)S2-0288-03StudyonthetreatmentforcokingplantwastewaterwithheterogeneousFenton-typecatalystCHENMin,XUYun-hua,JINLi-ye,YANGLin(SchoolofScience,BeijingJiaotongUniversity,Beijing100044,China)Abstract:CatalystsofFe3+supportedondifferentcarriershavebeenpreparedandtestedforphenoloxidationwithH2O2insimulantwastewater.AfairlysatisfiedresultwasobtainedwithFe3+supportedonactivatedcarbon.Ahome-madeFe3+supportedonactivatedcarbonisintroducedintheexperimenttodegradatethewastewaterwithphenol;orthogonalandsinglefactorexperimentsarecarriedouttodeterminethedoseofcatalyst,concentrationofH2O2andpH.Accordingtoexperimentalresults,undertheoptimumreactioncondition(catalystof1.5g,H2O2of2wt%andpHof5),Fe3+/activatedcarboncanmaketheremovalefficiencyofCODCrover95%inthedilutedcokingplantwastewater.Keywords:cokingplantwastewater;heterogeneousphase;Fenton-typecatalyst;catalyticoxidation　:2006-09-12　:(2042018),“”(2005sm060)　:(1982-),,,[e-mail];(1963-),,,,,,,010-51688497,[e-mail]。　　、。,,、、、,,。、,,Fenton,[1]。Fenton、,·OH,,(COD)。,,,、,,[2]。Fe3+FentonFe2+(Fe3++H2O2),Fe3+[3]。,Fenton,H2O2Fenton[4]。,Fe3+,H2O2,,。1　1.1　30%、、、、、,;、。TTL-10B(·288·Oct.2006现代化工26(2)ModernChemicalIndustry200610DOI:10.16606/j.cnki.issn0253-4320.2006.s2.080);pHS-25pH();SH-5();SHB-Ⅲ();DHG-9075A()。1.2　1.2.1　非均相催化剂的制备(、、)FeCl3、、Fe3+,,。1.2.2　苯酚的降解反应250mL,100mL,H2O2,pH,30min,CODCr。1.2.3　焦化废水的降解反应,。1.5g250mL,100mL,2.0mL30%H2O2,pH5,30min,、CODCr。2　,,,CODCr。2.1　(≥100m2/g)。[5],3(200m2/g),1.2.1,H2O2,,1。1,Fe3+,H2O2,CODCr。,,[6],,,,,,。1　CODCr　　/gCODCr/mg·L-1CODCr/%1.0344.0271.631.5344.0271.632.0281.4776.792.0445.66763.253.0328.38772.924.0390.93767.761.0101.7491.611.571.6694.092.026.4397.82　　:CODCr1212.60mg/L。2.2　Fenton,。。,Fenton、pH、、[7]。30℃,30℃;,30min。,Fenton、pH3。5.32mmol/L,(0.3、0.7、1.1、1.5g1.9g),H2O2(0.5%、1.0%、1.5%、2.0%、2.5%)pH(4、5、6、7、8)35,L25(56)。,、H2O2pH3:10.2、1.6、4.2。H2O2:pHH2O2。:1.5g,H2O22%,pH5。,。2.3　2.3.1　催化剂用量的确定:H2O22%,pH·289·200610:Fenton5,CODCr1,100mL(g)。图1　催化剂的量对CODCr去除率的影响1:,,1.5%,CODCr96.12%,,CODCr。Fe3+H2O2·OH,,·OH,·OH,,。1.5g,CODCr,1.5g。2.3.2　pH的确定:1.5g,H2O22%,pHCODCr2。图2　pH对CODCr去除率的影响2:pH=3～5,CODCr,pH5,pH5,pH,CODCr。pH,Fe3+,,·OH,H2O2,;pH3,Fe3+H2O2Fe2+·HO2,Fe2+·HO2H2O2·OH,pH5。2.3.2　H2O2浓度的确定:1.5g,pH5,H2O2CODCr3。图3　H2O2浓度对CODCr去除率的影响3,H2O22%,CODCrH2O2,H2O22%,CODCr97.78%;H2O2,CODCr。H2O2,·OH,H2O2,H2O2·OH,H2O2:2·OH+H2O22H2O+O2　　,H2O2CODCr,H2O22%。2.4　:1.5g,H2O22%,pH5。,,2。2　　　　COD/mg·L-1COD/mg·L-1COD/%0.5g/L1188.6731.4997.3551109.9547.2398.583889.5439.3695.5831172.9347.2396.003　———,,　　(下转第293页)·290·现代化工26(2)5,1～4m/s,;4m/s,;,。2.2　:pH6.5、50℃、4m/s、0.6MPa,4,L-,L-,1。1　/L·(m2·h)-1/MPa/℃/%/%18860.65096.187.228850.65097.588.539820.65098.085.7410810.65098.286.21,480L/(m2·h),L-96%,85%,。2.3　、,,。:;1.5%NaOH20min,;0.5%HNO310min,。,。3　(1)、,100%,88%。(2),pH6.5、50℃、4m/s、0.6MPa,80L/(m2·h),L-96%。(3)NaOH、HNO3,。[1].[J].,2006(1):28-29.[2],,.L-[J].,2006,21(1):4-6.[3],,,.2--L-[J].,2001,40(4):903-906.[4],,.[J].,2004,24(3):23-27.[5],,.[J].,2005,24(5):90-92.□　　(上接第290页):1.5g,H2O22%,pH5。,CODCr95%。,,。[1],,.Fenton-[J].:,2003(3):440-444.[2],,,.Fenton[J].:,2003(5):51-54.[3],.Fenton[J].,2006,26(2):40-42.[4]WallingC.Fentonsreagentrevisited[J].AccChemRes,1975(8):125-131.[5],,,.COD[J].,2001,21(4):19-22.[6].[M].:,1997.[7]FajerwengKDH.WetoxidationofphenolbyhydrogenperoxideusingheterogeneouscatalysisFe-ZSM-5:apromisingcatalyst[J].AppliedCatalysisB:Environmental,1996(10):1229-1235.□·293·200610:L-