搜索
:2001-03-05:(JA00153):(1967-),,,.1,1,1,1,1,1,2(11,350007;21,276001):(IR),,FentonFe2+,(Fenton),,NN,,,15min,CODCr,1h,CODCr80%,98%:;;;:X788:A:1001-6929(2002)01-0016-04StudiesofElectro2GeneratedHydroxylRadicalandItsUsinginDegradationandDecolorizationofDyesCHENRi2yao1,ZHENGXi1,QUYao2wen1,LINZhi2hong1,CHENXiao1,CHENZhen1,ZHANGYi2kang2(1.ExperimentCenter,FujianNormalUniversity,Fuzhou350007,China;2.LinyiNormalUniversity,Linyi276001,China)Abstract:Theelectro2chemistrybehaviorsofacidchromeblueandalizarinredintheelectrolysiscellhavebeeninvestigatedbyIRandcyclicvoltammographtoexplainthereactionsystemofFentonreagentinthispaper.Hydroxylradicalisformedinthecellbythefollowingreactionbe2tweenelectro2generatedH2O2andFe2+,whichisdissolvedfromtheanode.Theelectro2generatedFentonreagentwilloxidetheorganicdyesandbreaktheNNdoublebond.IRresultindicatedthatacidchromeblueisdecomposedintotwopartsofnaphthylamineandphenol2aminobenzenesulfonate,thencoprecipitatedwithFe(OH)3.Bothofthedegradationanddecolorizationofdyesareefficient.DecolorizationandCODCrremovingrateofdyesaredecreasedinthefirst15mininthecell.Whentheelectrolysiswascarriedoutfor1h,thedecolorizationratereaches98%andtheCODCrremovingrateapproaches80%.Keywords:environmentalchemistry;decolorizationofdyes;degradationofdyes;hydroxylradical,,pH,BOD,CODCr,CODCr60%,50%,,,,(Fenton)Fenton(218V),,,,,,1111,,100cm2,,Fe0Fe2+O2H2O2,151ResearchofEnvironmentalSciencesVol.15,No.1,2002Fe2+H2O2,FentonFe2+H2O2,20gPLNa2SO4300mgPL112751GW(),,113IR408(),,114CODCr,GB11914-89115BAS100A(BAS),,THF,LiClO4,20mVPs:ClHO3SOHNNOOOHOHSO3HH2O(a)(b)22111,,1(a),-014V,-118V,3,-116(),-111018V,,OH218V,,OH,,1(b),-012-017V,-017()0165V,-019V,-111V,1(vs.HgPHg2Cl2)Fig.1Cyclicvoltammographofacidchromeblueandalizarinred(vs.HgPHg2Cl2)22h2,1(a)(b),0116V,0145V33O2H2O2,0155VH2O2711:(01682Vvs.NHE,),,:Fe-2e=Fe2+-01441V(NHE)(1)O2+2H++2e=H2O20168V(2)Fe2++H2O2=OH+OH-+Fe3+(3)Fe3++3OH-=Fe(OH)3(4)OH+RH=H2O+R(5)R+R=RR(6)2(vs.HgPHg2Cl2)Fig.2Cyclicvoltammographofacidchromeblueandalizarinredafterelectrolysistreatment(vs.HgPHg2Cl2)3-(vs.HgPHg2Cl2)Fig.3CyclicvoltammographofO2porouselectrodeinNa2SO4solution(vs.HgPHg2Cl2),,Fe(OH)3,21244(a)330mm-1OH;160mm-1;14714mm-1CC;136mm-1N;140160mm-1IR,NN,IR115120mm-1OHCl,ClCl,CCl3,10317mm-1CClCH5HIR77(a)(b)2h4Fig.4IRspectrumofacidchromedye(a)Acidchromeblue(b)Afterelectrolysisfor2hours73mm-1,H,,H8690mm-14(a)7889mm-1H2h,IR4(b),4(b)4(a),ArOH(330120mm-1)CC(160mm-1)(110mm-1),4(a)10317mm-1ArClCH,AgNO38115,,,NN,FeCl3,:ClHO3SOHNNClHO3SOHNNHO3SOHNH2+H2N+Cl-+FeCl3Fe3+2135,510nm5,15min,,2h,,6CODCr6,15min,CODCr56%;015h,70%;1h,80%5Fig.5Decolorrizationrateofacidchromedye6CODCrFig.6CODCrremoverateindifferenttime3a1,,b1,,15min,CODCr56%,015h70%,1h80%,98%c1,,3:[1]JiajinpingYanngji.TreatmentofdyeingwastewasterwithACFelectro2des[J].WaterResearch,1999,33(3):881-884.[2]SimonssonD.Electrochemistryforcleanerenvironment[J].ChemicalSocietyReviews,1997,26(3):181-190.[3].[M].:,1997.[4]NaumczykJ,SzpykowiczL,GrandiFZ.Electrochemicaltreatmentoftexitilewastewater[J].WaterSciTechnol,1996,33(7):17-24.[5],,,.[J]..2000,1(2):21-25.[6]PignatelloJ.Completeoxidationof2,42Dbyfentonsreagent[J].EnvironSciTechnol,1990,24:378.[7]KuoWG.Decolorizingdyewastewaterwithfentonreagent[J].WatRes,1992,26(7):881.[8]BockrisJOM,ConwayBE,YeagerE,etal.Comprehensivetreatiseofelectrochemistry[M].NewYork:Vol.2ElectrochemicalProcess2ing,PlenumPress,1981.[9],,,.[M].:,1984.[10]ShurvellHF.Theactivationenergyofanionicreaction[J].JChemEduc,1966,43(10):555.[11].[M].:,1977.[12],PH.[M].,,,.:,1980.911: