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31环境工程学报Vol.3,No.120091ChineseJournalofEnvironmentalEngineeringJan.2009王春霞1,2肖书虎1赵旭1刘会娟1曲久辉1*常雁红2(1.,100085;2.,100083),(TOC)(COD),UV-Vis(200~500nm),,(ACF),pH3,Fe2+1mmol/L,015A,O2250mL/min360min,TOCCOD7819%6218%,X70311A1673-9108(2009)01-0011-06Studyonthetreatmentoflandfillleachatebyphoto-electro-FentonoxidationWangChunxia1,2XiaoShuhu1ZhaoXu1LiuHuijuan1QuJiuhui1ChangYanhong2(1.StateKeyLaboratoryofEnvironmentalAquaticChemistry,ResearchCenterforEco-EnvironmentalSciences,ChineseAcademyofSciences,Beijing100085;2.InstituteofCivilandEnvironmentalEngineering,ScienceandTechnologyUniversityofBeijing,Beijing100083)AbstractPhoto-electro-Fentonoxidationmethodwasusedtotreatlandfillleachate,whichwaspre-treatedbybiochemicalprocessandsampledfromalandfillinBeijingCity.Theeffectsofcurrentstrengthandironva-lenceontotalorganiccarbon(TOC),chemicaloxygendose(COD),andcolorremovalwereinvestigated.Meanwhile,severaldifferentreactionsofanodicoxidation,electro-Fenton,andphoto-electro-Fentonwerecom-pared.TheUV-Visspectrometryoflandfillleachateaswellasthemolecularweightdistributionoforganicpollu-tants(measuredviaGelchromatography)wasanalyzed.Thebiodegradabilitywasimprovedgreatly.Variationofironconcentrationinthereactionprocesswasalsotested.Thephoto-electro-FentonreactionusingACFcathodecoulddegradelandfillleachateeffectively.After360minelectrolysisandundertheoperationconditionsof015Acurren,t1mmol/LFe2+,250mL/minO2atpH3,7819%ofTOCand6218%ofCODwereremovedrespec-tivelyaswellascompletedecolorization.Keywordsphoto-electro-Fentonreaction;landfillleachate;ironvalencechanges;anodeoxidation;electro-Fenton:(50778172);(RCEES-QN-2007Z007):2008-05-15;:2008-11-15:(1981~),,,E-mai:lwcxwyc1981@163.com*,E-mai:ljhqu@rcees.ac.cn,,,[1],,,(COD),,:[2][3]Fenton[1][4],H2O2H2O23Fe2+,Fe3+Fe2+,H2O2,[5,6]:O2+2H++2eyH2O2(1)Fe2++H2O2yFe3++OH-+#OH(2)#OH+RH()yP()(3),,#OH,,[7](ACF),,;,,11.1,(MBR),:COD860mg/L,BOD530mg/L,TOC287mg/L,23.1mS/cm,pH7.5~8.6,(BOD/COD=0103),;,1.2[8]500mLRuO2/Ti,,10cm@6cm;10W3cm,,,0145Lm,250mL/min;AMRFLmode:lLPS302()pH3,1mmol/L1.3FeSO4#7H2OFe2(SO4)3H2SO4NaOH,;pH0.2mol/LH2SO4,720APLUSBenchtoppH(ThermoOrionCo.USA);UV-VisU-3010UV-Vis(HitachiCo.Japan);U-3010(HitachiCo.Japan)Kmax=400nm,[9];Fe2+Fe3+[10];H2O2[11];TOCPhoenix8000TOC(TekmanDohrmann.Co.USA)[10];COD(HACHDRB200DR2800)[10];(biologicaloxygendemand,BOD)[10];,TSKgelG3000PWXL(HitachiCo.Japan),pH618(01004mol/LNaH2PO4+Na2HPO40.01mol/L);016mL/min,25e;20LL,254nm22.1,1pH3,Fe2+1mmol/L,01508A,3,1Fig.1EffectofdifferentprocessesonTOCandcolorremoval121:90%,,100%TOC2010%3418%7914%,TOC,;O2H2O2,H2O2Fe2+,#OH;H2O2/UVUV/Fe(OH)2+[12,13]2.22(a,b)UV-Vis(200~500nm)(GPC)2(a),UV-Vis/,/[14],,180min300nm,n-P*,,2(b),,,,[15]2(b),10~13min(),60min,,;,,360min,Kmax=254nm(2a),2(c)pH3,Fe2+1mmol/L,015A,,BOD/COD,360min,BOD/COD2Fig.2Compositionchangesoflandfillleachateinphotoelectric-Fentonprocess0142,[16],,;,,,,,2.3pH3,Fe2+1mmol/L,015A,1333,56mg/L(1mmol/L),30min,Fe2+,Fe3+,Fe2+Fe3+Fe2+H2O2Fe3+,#OH;Fe3+Fe2+;,Fe3+#OHFe(OH)2+,Fe3+Fe2+,Fe(OH)2+[13],Fe2+Fe3+Fe2+/Fe3+,Fe2+Fe3+,,[6,17,18]3Fig.3ChangesofironconcentrationinreactionsystempH3,Fe2+1mmol/L,015A,1mmol/LFe2+1mmol/LFe3+0.5mmol/LFe2++015mmol/LFe3+,4,Fe2+,,Fe2+TOCCOD2Fe2+H2O2,,#OH,#OH,C)CC)H,CO2H2O,TOCCODFe3+,H2O2,Fe3+Fe2+,Fe2+H2O2#OH[12,19]Fe2+Fe3+0.5mmol/L,Fe2+,Fe2+Fe3+0.5mmol/LFe2+Fe3+,Fe2+Fe3+,TOCCODFe3+Fe2+,3Fe2+,Fe2+1mmol/L4Fe2+Fe3+Fe2++Fe3+Fig.4EffectofFe2+,Fe3+andFe2++Fe3+onphoto-electro-fenten2.45pH3,Fe2+1mmol/L,,5(a,b),,TOCCOD;01122A5611%3912%,015A78.9%62.8%,,,,TOC141:COD,H2O2COD,COD,COD,O2H2O2,CODH2O25(c),,H2O2,#OH[12,20],,5TOCCODFig.5EffectofdifferentcurrentstrengthonTOC,CODandH2O2,,,H2O2/UVUV,,3(1)ACF,,015ApH3Fe2+1mmol/L250mL/min360min,,TOCCOD7819%6218%,(2),#OH,(3)Fe2+Fe3+,Fe2+,Fe2+,1mmol/L(4)UV-Vis,/,360min,,UV254,[1],,,./Fenton.,2005,26(12):2273~2278[2],,,..,2005,(3):50~56[3],..,2002,15(2):32~34[4],,,..,2004,33(10):609~614[5]ZhangHu,iCholHeung-jin,HuangChin-pao.Optimizationoffentonprocessforthetreatmentoflandfillleachate.Haz-ard.Mater.,2005,125(3):166~174[6],,,.-Fenton.,2004,24(12):9~13[7]AhmetAltin.Analternativetypeofphotoelectro-Fentonprocessforthetreatmentoflandfillleachate.Sepn.andPu-rifn.Techno.l,2008,61:391~397[8],,,.:CN1789150,2004-10-9[9]MoraesP.B.,BertazzolliR.Electrodegradationoflandfill153leachateinaflowelectrochemicalreactor.Chemosphere,2005,5(8):41~46[10]..:,2002[11],,.Fenton.,1996,23(2):184~186[12].B/.:,2005[13]BirameBoye,MomarMorie.meDieng,EnricBrillas.A-nodicoxidation,electro-Fentonandphotoelectro-Fentontreatmentsof2,4,5-trichlorophenoxyaceticacid.Electroa-nalyticalChemistry,2003,557:135~146[14]YangmingLe,iZheminShen,RenhuaHuang,etal.Treatmentoflandfillleachatebycombinedaged-refusebioreactorandelectro-oxidation.WaterRes.,2007,41:2417~2426[15]QinghuaJ,iHuijuanLiu,ChengzhiHu,etal.Removalofdisinfectionby-productsprecursorsbypolyaluminumchlo-ridecoagulationcoupledwithchlorination.Sepn.andPu-rifn.Techno.l,2008,62:465~470[16]LopezA.,KiwiJ.Modelingtheperformanceofaninno-vativemembrane-basedreactor.Abatementofazodye(OrangeII)uptobiocompatibility.Ind.Eng.Chem.Res.,