Fenton法降解垃圾渗滤液中的溶解性有机质章琴琴

114Vol．11No．420174ChineseJournalofEnvironmentalEngineeringApr．201751378494512085392016－01－142016－02－261987—。[e-mail]*[e-mail]*400714dissolvedorganicmatterDOM。FentonFe2++H2O2·OHDOM。FentonCODTOC65%42%CODTOC20%21%。、SUVA254、E3/E4FentonDOM。GC-MS47Fenton52-、、、。pH、H2O2Fe2+CODDOM、TOCUV254Ｒ2＞0.9。DOMFenton。DOMFentonX703A1673-9108201704-2219-08DOI10.12030/j．cjee．201601088DegradationofdissolvedorganicmatterinlandfillleachatebyFentontreat-mentZHANGQinqinSONGChengHUAYaniCUIChangJINXiaojunWANGChuan*ChongqingInstituteofGreenandIntelligentTechnologyChineseAcademyofSciencesKeyLaboratoryofＲeservoirAquaticEnvironmentChineseA-cademyofSciencesChongqing400714ChinaAbstractLandfillleachatecontainshighconcentrationsoftoxiccompoundsanddissolvedorganicmatterDOManditisnotreadilybiodegradable．TheFentonprocessFe2++H2O2canproducehighlyreactivehydroxylradicals·OHthatarecapableofrapidlyoxidizingDOMandtraceorganiccompoundsinlandfillleachate．InthisstudylandfillleachatewastreatedbytheFentonprocessandtheresultsshowedthattheremov-alefficienciesforthechemicaloxygendemandCODandtotalorganiccarbonTOCwere65%and42%respectivelythesevaluesincludethe20%CODremovaland21%TOCremovalachievedbytheironsludgeco-agulationprocess．FromthevaluesofSUVA254E3/E4andotherparametersitwasdemonstratedthattheFen-tonmethodcouldeffectivelyreducedtheamountofDOMintheleachate．Theamountofsmallmolecularweightcompoundsincreasedastheamountoflargemolecularweightcompoundsdecreasedduringtreatment．Numerousorganiccompounds47kindswereidentifiedinrawlandfillleachatebygaschromatography-massspectrometryGC-MSanalyses．ThosecompoundswerenotdetectedinthesupernatantwateraftertheFentonreactionbutfivecompoundsdi-2-ethylhexylphthalatephytonsqualenecholestacholestanolweredetectedintheprecipitatedironsludge．Wealsofoundthattherewasasignificantlinearcorrelationbetweentheremainingcon-centrationofCODandtheremainingconcentrationsandvaluesforDOMTOCandUV254Ｒ2＞0.9atdiffer-entpHvaluesandH2O2Fe2+concentrationconditions．TheseresultsprovidescientificsupportforuseoftheFentonprocessineffortstoimprovethetreatmentoflandfillleachateandpromotethedegradationofDOM．KeywordslandfillleachatedissolvedorganicmatterDOMFentonoxidationcoagulation11DOM、、、。DOM—OH—NH2CO—COOH1、、、、、、、2。DOMCOD3。μg·L－1ng·L－1、4-5。BEHNISCH6KAWAGOSHI7。BAUEＲ8PAEsTOC。ZHENG9DOMPAEsPAEs。DOM。Fenton·OH、。FentonpHFeOH310DOMDOM。DOM。Fenton。pH、、DOMFenton。11.130%、FeSO4·7H2O、、、。、HPLCSigma-AldrichSigma-AldrichSt．LouisMOUSA。7890A/5977-Agilent。31h、、。1.220144。、20min。250mL100mL。pH·5min30min150g·L－1pH=7.5。2h。0.45μmCODTOC。10200～800nmUV-Vis。UV254nmUV。2h。pH5.0g·L－110.0g·L－1。pH3.05.0g·L－1。pH3.010.0g·L－1。pH3.05.0g·L－110.0g·L－1。1.31.3.1200mL40mL500℃2。2mL0.2μmGC-MS。。FentonpH7.530min。02224Fenton1200r·min－115min25℃－80℃1.0g45℃24h。GC-MS1.0μLHP-5ms3m×0.25mm×0.25μm250℃40℃2min4℃·min－1150℃1min4℃·min－1220℃4min5℃·min－1300℃4min。ScanGCMS250℃230℃0m/z30～1000amu。NIST2011。1.3.2DOM、、UVDBPsUV/VisDOM3UV220、SUVA11254E3/E124。E3/E4=UVA300/UVA400SUVA254=UVA254/TOC×100CN=A2436+A2525+A2620A436+A525+A620UV2543。A13400CN14。E3/E415。DOMXUE16WANG17250～350nmDOM。CODCODpHTOC。1218ηoverall%=C0－C1C0×100ηoxid%=C0－C2C0×100ηcoag%=ηoverall－ηoxidC0C1C2。22.1pHDOM。1a250～280nm、19。pH。pH、。pH。pH3.5～5.020。pH=3.0、4.05.0250～280nmpHpH=6.07.0。1a1bFentonpH3.0～5.0pH=3.0Fe-OH+pHFeOH+Fe2+21-22。1cdSUVA2542.671.1L·mg·cm－1E3/E4Fenton。2pHCNA400。1pH3.05.0。UV254A4001222111pHaFenton-bDOMcSUVA254dE3/E4Fig．1aUltraviolet-visibleabsorptionspectrabDOMcSUVA254dE3/E4inlandfillleachateunderdifferentinitialpHvaluesbyFentonreactionA220·OHFenton12。pH3.0～7.0UV25466%～95%CNA400pH3.0～5.090%pH。SUVA25459.7%～84.3%FentonDOM。2pHFig．2EffectofpHonremovalefficienciesofwaterqualityindicatorsHCO－3CO2－3TICHCO－3CO2－3·OH23TICDOM·OH。pHHCO－3CO2－3·OH·OH2.7V1.8V24。2pHTIC。2.2·OHFenton。3SUVA254、DOME3/E4。3FentonSUVA254E3/E4。1.02.0g·L－1DOM68.6%80.6%5.0、10.0、15.020.0g·L－122224Fenton3SUVA254、E3/E4、DOMFig．3ChangeofSUVA254E3/E4DOMatdifferentH2O2dose4Fig．4EffectofH2O2onremovalefficienciesofwaterqualityindicatorsDOM91.6%～94.8%。4。H2O2·OH12。25。Fenton。H2O210.0g·L－1TOC56%。2.3·OH5SUVA254E3/E4。23DOMTOC。FentonTOCTOC＜500500～100026。SUVA254E3/E4。CNA40090%SUVA25483%。COD40%～87%A20016%～84%TOC18%～67%。5.0g·L－1DOM93.7%。5SUVA254、E3/E4、DOMFig．5ChangeofSUVA254E3/E4DOMatdifferentFeSO4·7H2Odose2.4CODTOC、DOM、UV254COD、UV254、TOC。COD3222116Fig．6EffectofFeSO4·7H2OonremovalefficienciesofwaterqualityindicatorsCOD。CCCO254nm。UV254。UV254。TOC。TOCCOD。DOM。7pH、、FentonCODTOC、DOM、UV254。pH、FentonCODTOC、DOMUV254Ｒ2＞0.9。。7apHbcFentonCODTOC、DOM、UV254Fig．7ＲelationshipbetweentheresidualCODandTOCDOMUV254underdifferentainitialpHvaluesbinitialH2O2dosecinitialFeSO4·7H2OdoseduringFentonprocess2.5FentonFenton4pH、、27。WALLING28LIN29FentonFe2+、Fe3+。30。FentonTOCCODTOCCOD21%20%COD65%TOC42%。31Cos=4TOC－COD/TOC－12.59Fenton－2.82Fenton。42224Fenton8FentonCODTOCpH=3.0=5.0g·L－1=10.0g·L－1Fig．8ＲemovalefficienciesofCODandTOCbyoxidationandcoagulationrespectively9FentonGC-MSFig．9GC-MStotalionchromatographybeforeandafterFentonreaction2.6。GC-MS、Fenton9。504712824-3513365PAEs13、。Fenton。2-、、、、。Fenton。3Fenton·