电化学氧化预处理垃圾渗滤液的实验研究

33520085ENVIRONMENTALSCIENCEANDMANAGEMENTVol133No15May2008:2008-01-09:(1982-),,,,:1673-1212(2008)05-0115-03邓莉娟,王中琪,兰紫荆(,621010):随着工业和城市的发展,难生物降解的有机物种类与数量日益增加,电催化氧化技术由于其对有机物具有特殊的降解机理和能力,被水处理界寄予厚望本研究利用电化学氧化技术,以气体扩散电极为阴极,不锈钢板为阳极,向电解槽中通入空气,改变反应条件,对垃圾渗滤液进行了降解研究最佳工艺条件为:电流密度=30mA#cm-2电极距d=2cmpH=315[Cl-]=6000mg#L-1投加的FeSO4.H2O=0180g,在此条件下废水CODcr去除率达75.62%:气体扩散电极;垃圾渗滤液;电化学氧化:X703.1:AStudiesontheTreatmentofLandfillLeachatebyElectrochemicalOxidizingDengLijuan,WangZhongq,iLanZijing(SouthwestUniversityofScienceandTechnology,Mianyang621010,China)Abstract:Astheindustryandurbandevelopmen,tthecategoryandquantityofhardbiodegradationorganicsubstancein-creasedaybyday.Electriccatalusistechniquehasbeengivengreatexpectationbywatertreatmentrealm,forithasspecialmech-anismandcapabilitytodegradeorganicsubstance.Landfillleachateiselectrolyzedbyusinggasdiffusionelectrodeascathodeandstainlesssteelasanode.AirisintroducedintotheelectrolyticcelltoproduceFentonreagen.tTheresultsshowedthatattheopt-imumconditionswith40mA#cm-2ofcurrentdensity,2cmofelectrodespacing,pHvaluesof3.5,6000mg#L-1of[Cl-]concentrationand0180gofFeSO4.H2Oinputquantity.Intheoptmialconditions,theremovalratesofCODcris75.62%respec-tively.Keywords:gasdiffusionelectrode;landfillleachate;electro-chemicaloxidation,CODcr,,,/0,,[1-2],,[3-4],,[5-8],11.1,,,,,,80mm@60mm014L1.2014L,,pHCl-Fe2+,CODcrpH;,,,#115#33520085#Vol133No15May200822.11,,#OH,,,,,,2cm,60min~100min,CODcr55%,,CODcr510cm,,CODcr3114%1CODcr2.22:,,,40mA/cm250mA/cm2,,;,,,2CODcr2.3pH3:pH=4,100min,(59.92%)pH,Fe2+,H2O2H2O2[9],,pH,,,COD3pHCODcr2.4Cl-,,,,4:[Cl-],CODcr,[Cl-][Cl-][Cl-]9000mg/L,,,,,[10]4Cl-CODcr#116#33520085#Vol133No15May20082.5Fe2+5Fe2+CODcr5:FeSO4#7H2O0.96g,CODcr,FeSO4#7H2O#,#OHFeSO4#7H2O0196g,CODcr,FeSO4#7H2O,H2O2#OH,,#OH,#OH2.6,2cm,11mA#cm-2pHCl-mg#L-1FeSO4.7H2OgCODcr(%)11(30)1(3)1(5000)1(0.64)60.74212(3.5)2(6000)2(0.80)75.62313(4)3(7000)3(0.96)62.642(35)12363.225223167.986231264.0573(40)13265.298321367.989332170.66K1198.96189.25192.77199.38K2195.25211.58209.5204.96K3203.93197.31195.87193.8k166.3263.0864.2666.46k265.0870.5369.8368.32k367.9865.7765.2964.6R2.897.445.583.72,,pH,[Cl-],FeSO4#7H2O,:=30mA/cm2,pH=315,[Cl-]=6000mg/L,FeSO4#7H2O=0.80g,,CODcr75.62%33.1,,,pH[Cl-]CODcr3.2:=30mA/cm2,pH=315,[Cl-]=3000mg/L,FeSO4#7H2O=0.80g,,CODcr75162%:[1]吴平谷.饮用水中邻苯二甲酸类的调查[J].环境与健康杂志,1996,16(6):338-339.[2]邹长伟.垃圾填埋场渗滤液的处理技术[J].环境与开发,2001,16(3):23-24.[3]张祥丹,王家民.城市垃圾渗透液处理工艺介绍[J].给水排水,2000,26(10):9-14.[4]罗阳春,王家德,陈建孟,等.电催化氧化技术提高垃圾渗滤液可生化性的研究[J].水处理技术,2005,31(5):73-76.[5]夏庆余,孔健健,郑曦,等.高铁酸盐深度处理垃圾渗滤液[J].水处理技术,2005,31(7):58-60.[6]高艳娇,黄继国,聂广正,等.Fenton氧化法深度处理垃圾渗滤液[J].工业用水与废水,2005,36(6):39-41.[7]王立军,聂广正,李森,等.Fenton试剂法在垃圾渗滤液深度处理中的应用[J].长春工程学院学报(自然科学版),2006,7(2):37-39.[8]邹长伟,万金保,彭希珑,等.Fenton试剂和UVFen-ton试剂深度处理垃圾渗滤液[J].江西科学,2004,22(4):246-249.[9]郁青红,周明华,雷乐成.新型气体扩散电极体系高效产H2O2的研究[J].物理化学学报,2006,22(7):883-887.[10]孙德智.环境工程中的高级氧化技术[M].北京:化学工业出版社,2002:190-196.#117#