Fenton试剂氧化降解紫丁香醇的研究王昶

Fenton*112111.3004572.300457SLFentonpH、H2O2、Fe2+、、、。pH3.0H2O2Fe2+H2O215060min50mg/L87.5%Fenton30min。Fenton·OHSTUDYONOXIDATIVEDEGRADATIONOFSYRINGYLLIGNINWITHFENTONPROCESSWangChang1ZhangLiping1LiLing2JiaQingzhu1LiGuiju11.CollegeofMarineScienceandEngineeringTianjinUniversityofScienceandTechnologyTianjin300457China2.CollegeofMaterialScienceandChemicalEngineeringTianjinUniversityofScience＆TechnologyTianjin300457ChinaAbstractThecharactersofthedegradationsyringylligninobtainedfromthepapermakingwastewaterwereinvestigatedinaself-designedcylindricalreactor.ItwasshowedthatpHvaluethedosageofH2O2theconcentrationofFe2+syringyllignininitialconcentrationreactiontimeandUVirradiationetcfactorshadinfluenceondegradationofsyringelignin.TheexperimentalresultsshowedthatatpH=3andT=20±1℃thehighlevel87.5%ofsyringyllignindegradationwereachievedduring60minwhenthedosageofH2O2wastwotimesofthetheoreticalquantityandFe2+/H2O2molarratio=1∶50.ThedegradationofsyringylligninwasimprovedgreatlywhenemployingUVirradiationtoFentonprocess.Byusingthisprocesssyringylligninwasdecomposedcompletelyduringonly30min.KeywordshomogeneousFentonhydrogenperoxidesyringyllignin*0604140。03、1。2-3。、4。COD2。FentonH2O2Fe2+·OH2.80VCO2H2O。Fenton、、、、Fenton、。5－FentonpH、H2O2、Fe2+2620112291DOI:10.13205/j.hjgc.2011.01.019、、、Fenton。11.11UV-1100－J500pHS-3C85-2ZSZ。230%。。1.2SLOHC6H3OCH32、、1λmax=267.6nm。1SL1.31.3.1H2O2H2O2CO2H2OH2O2。150mg/LH2O2198.7mg/L30%H2O21.110g/mLH2O2Qth0.60mL/L。H2O2Qth。C8H10O3+18H2O2→8CO2+23H2O11.3.2Fenton10cm15cm8cm750cm36-720℃。1.3.3500mLH2SO4NaOHpH。10mg/LFeSO430%H2O2。5mLNa2SO3267.6nm274.4nm7。=C0－CC0×100%C0———mg/LC———mg/L。22.1。267.6nm274.4nmSLC1A2SL23。ASL1=0.0059C1+0.0047R2=0.99982ASL2=0.0047C1+0.0047R2=0.99973ASL1SL267.6nmASL2SL274.4nmASL2。2SLGL267.6、274.4nm3。45。AGL1=0.0171C2－0.0004R2=0.99964AGL2=0.0220C2－0.0068R2=0.99975AGL1GL267.6nmAGL2GL274.45nmC2GL。36201122913GL2～567。267.6nmA1=ASL1+AGL1=0.0059C1+0.0047+0.0171C2－0.0004=0.0059C1+0.0171C2+0.00436274.4nmA2=ASL2+AGL2=0.0047C1+0.0047+0.0220C2－0.0068=0.0047C1+0.0220C2－0.00217C1C2。2.2pH0.025g50mg/L500mLH2SO4NaOHpH3456910H2O2nFe2+nH2O2=150Fenton90min。pH4。4pH4pH3.0～4.0FentonpH3.087.5%。pH2.0pH6.343.2%。pH。pH·OH。pHFe2+H2O2。H2O2pHH2O2O2H2O8。pHH2O2·OH。H+Fe3+Fe2+Fe2+。pHH2O2Fe2+pH3.0Fenton。2.3H2O20.025g50mg/L500mLpH3.0H2O20.25Qth、0.5Qth、1.0Qth、2.0Qth3.0QthnFe2+nH2O2=150Fenton90min。H2O25。5H2O25H2O2。30%H2O22.0Qth。H2O2。H2O2·OH4620112291。H2O2·OHH2O2H2O2·OH·OH。H2O22.0Qth。2.4nFe2+/nH2O20.025g50mg/L500mLpH3.0H2O22.0QthnFe2+nH2O21∶100、1∶80、1∶50、1∶25、1∶20Fenton90min。Fe2+6。6nFe2+∶nH2O26Fe2+Fe2+H2O2Fe2+Fe2+。nFe2+nH2O2=1∶50。Fe2+。Fe2+Fenton·OHFe2+Fe2+·OH。Fe2+。1Fe2+H2O2·OH·OH·OH2Fe2+·OH8Fe2++·OH→Fe3++OH－8·OH。FentonFe2+。Fe2+。2.510305080100mg/L500mLpH3.0H2O2Fe2+H2O22.0QthnFe2+nH2O2=1∶50Fenton90min。7。77H2O2·OH。H2O2H2O2·OH。H2O2Fe2+。H2O2·OHH2O2·OHH2O2Fenton。2.60.025g50mg/L500mLpH3.0H2O22.0Qth=0.6mLnFe2+nH2O2=1∶50Fenton。8。830min80%Fenton。60min87%。860min56201122918。Fenton60min·OH。60min·OH。2.70.025g50mg/L500mLpH3.0H2O22.0Qth=0.6mLnFe2+∶nH2O2=1∶5011Wλ=253.7nmFenton90min。Fenton9。99Fenton9。30min60min87.5%。Fenton·OH。H2O2·OH。pH3Fe3+OH－FeOH2+。Fe2+·OHFe2+Fenton·OH。31pH、H2O2、Fe2+、、、Fenton。250mg/LpH3.0H2O222.0Qth=0.6mLnFe2+∶nH2O21∶5060min87.5%。3Fenton30min100%。1HustertKZeppRG.PhotocatalyticdegradationofselectedazodyesJ.Chemosphere2004242335-42.2.FentonJ.2007330-32.3.FentonJ.200725411-13.4.TiO2J.200221557-60.5.FentonJ.2009242472-76.6.TiO2J.200722456-60.7.FentonJ.200524148-53.8SanjaPDinkoVNatalijaKetal.DecolourizationandmineralizationofcommercialreactivedyesbyusinghomogeneousandheterogeneousFentonandUV/FentonprocessesJ.HazardousMaterials200916421137-1145.9.UV/[e-mail]2010－06－126620112291