光电芬顿氧化法深度处理垃圾渗滤液研究王春霞

3　1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,0.5A,O2250mL/min360min,TOCCOD78.9%62.8%,。　　　　　　X703.1　　　A　　　1673-9108(2009)01-0011-06Studyonthetreatmentoflandfillleachatebyphoto-electro-FentonoxidationWangChunxia1,2　XiaoShuhu1　ZhaoXu1　LiuHuijuan1　QuJiuhui1　ChangYanhong2(1.StateKeyLaboratoryofEnvironmentalAquaticChemistry,ResearchCenterforEco-EnvironmentalSciences,ChineseAcademyofSciences,Beijing100085;2.InstituteofCivilandEnvironmentalEngineering,ScienceandTechnologyUniversityofBeijing,Beijing100083)Abstract　Photo-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.After360minelectrolysisandundertheoperationconditionsof0.5Acurrent,1mmol/LFe2+,250mL/minO2atpH3,78.9%ofTOCand62.8%ofCODwereremovedrespec-tivelyaswellascompletedecolorization.Keywords　photo-electro-Fentonreaction;landfillleachate;ironvalencechanges;anodeoxidation;electro-Fenton:(50778172);(RCEES-QN-2007Z007):2008-05-15;:2008-11-15:(1981～),,,。E-mail:[e-mail]＊,E-mail:[e-mail]　　,,,[1],。,,(COD),,。:、。[2]、[3]、Fenton[1]、[4]。,H2O2、H2O2、3。Fe2+,Fe3+Fe2+,H2O2,[5,6]:O2+2H++2e※H2O2(1)Fe2++H2O2※Fe3++OH-+·OH(2)·OH+RH()※P()(3),。,·OH,,[7]。(ACF),,;,,。1　1.1　,(MBR),:COD860mg/L,BOD530mg/L,TOC287mg/L,23.1mS/cm,pH7.5～8.6。,(BOD/COD=0.03),;,。1.2　[8]。500mL。RuO2/Ti,,10cm×6cm;10W3cm,,,0.45μm。,250mL/min;AMRFLmodel:LPS302()。pH3,1mmol/L。1.3　FeSO4·7H2O、Fe2(SO4)3、H2SO4、NaOH,;。pH0.2mol/LH2SO4,720APLUSBenchtoppH(ThermoOrionCo.USA);UV-VisU-3010UV-Vis(HitachiCo.Japan);U-3010(HitachiCo.Japan)λmax=400nm,[9];Fe2+、Fe3+[10];H2O2[11];TOCPhoenix8000TOC(TekmanDohrmann.Co.USA)[10];COD(HACHDRB200DR2800)[10];(biologicaloxygendemand,BOD)[10];,TSKgelG3000PWXL(HitachiCo.Japan),pH6.8(0.004mol/LNaH2PO4+Na2HPO40.01mol/L);0.6mL/min,25℃;20μL,254nm。2　2.1　、,1。pH3,Fe2+1mmol/L,0.508A,3,1　Fig.1　EffectofdifferentprocessesonTOCandcolorremoval121:90%,,100%。、TOC20.0%、34.8%79.4%,TOC。,;O2H2O2,H2O2Fe2+,·OH;H2O2/UV、UV/Fe(OH)2+[12,13]。2.2　。2(a,b)UV-Vis(200～500nm)(GPC)。2(a),UV-Vis/,/[14]。,,180min300nm,n-π＊,,。2(b)。,,,,[15]。2(b),10～13min(),60min,,;,,360min,λmax=254nm(2a),。2(c)pH3,Fe2+1mmol/L,0.5A,。,BOD/COD,360min,BOD/COD2　Fig.2　Compositionchangesoflandfillleachateinphotoelectric-Fentonprocess0.42,[16]。,,;,,、,。,,。2.3　pH3,Fe2+1mmol/L,0.5A,133。3,56mg/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]。3　Fig.3　Changesofironconcentrationinreactionsystem。pH3,Fe2+1mmol/L,0.5A,1mmol/LFe2+、1mmol/LFe3+0.5mmol/LFe2++0.5mmol/LFe3+,4。,Fe2+,,Fe2+TOCCOD2。Fe2+H2O2,,·OH,·OH,C—CC—H,CO2H2O,TOCCOD。Fe3+,H2O2,Fe3+Fe2+,Fe2+H2O2·OH[12,19]。Fe2+Fe3+0.5mmol/L,Fe2+,Fe2+、Fe3+0.5mmol/LFe2+Fe3+。,Fe2+Fe3+,TOCCOD。Fe3+Fe2+,3Fe2+,。Fe2+1mmol/L。4　Fe2+、Fe3+Fe2++Fe3+Fig.4　EffectofFe2+,Fe3+andFe2++Fe3+onphoto-electro-fenten2.4　。5。pH3,Fe2+1mmol/L,,。5(a,b),,TOCCOD;0.122A56.1%39.2%,0.5A78.9%62.8%。,,,。,TOC141:COD,H2O2COD,COD,COD。,O2H2O2,COD。H2O25(c),,H2O2,·OH[12,20],,。5　TOCCODFig.5　EffectofdifferentcurrentstrengthonTOC,CODandH2O2　　,,,、H2O2/UV、UV,,。3　　(1)ACF,,0.5A、pH3、Fe2+1mmol/L、250mL/min360min,,TOCCOD78.9%62.8%,。(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]ZhangHui,CholHeung-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.Technol.,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]YangmingLei,ZheminShen,RenhuaHuang,etal.Treatmentoflandfillleachatebycombinedaged-refusebioreactorandelectro-oxidation.WaterRes.,2007,41:2417～2426[15]QinghuaJi,HuijuanLiu,ChengzhiHu,etal.Removalofdisinfectionby-productsprecursorsbypolyaluminumchlo-ridecoagulationcoupledwithchlorination.Sepn.andPu-rifn.Technol.,2008,62:465～