光助电Fenton法催化降解硝基苯及影响因素班福忱

　　:2006-03-18:(2005344):(1976-),,.:1671-2021(2006)05-0809-03-Fenton班福忱,李亚峰,贾新军,赵　娜(,110168)　:为了寻求一种经济且有效的硝基苯废水的处理方法.根据电解原理,试验以多孔石墨作为阴极,以廉价的铁板作为阳极,向阴极不断通入空气,并在反应体系中引入紫外光.电解过程中生成的H2O2与阳极溶解的Fe2+形成Fenton试剂,利用Fenton试剂在电解的过程中产生的大量活性羟基的强氧化作用来氧化降解废水中的有机物.在光助电-Fenton法各试验参数当中,pH值、电流密度对硝基苯去除率的影响较大.在pH值为2.5,电解时间为60min,极板电流密度8mA/cm2的试验条件下,硝基苯迅速降解,去除率可以达到88%以上.光助电-Fen-ton法适用于处理浓度较高、且有毒性的废水,是个快捷、经济、高效的废水处理方法.同时对其它工业废水的处理具有借鉴意义.:;-Fenton;:X703　　　:A　　　　　,、、,,,,[1-2].,.Fenton、UV、UV/H2O2、UV/Fenton,、Fenton、.,FentonFen-ton.:Fenton-Fenton;Fenton-Fenton.H2O2,Fenton[3-4].,-Fenton、、[5-8].Fenton,Fe2+H2O2,.、Fe2+[9].,Fenton..Fenton,,Fenton.、,.1　1.1　15cm×12cm×15cm,10cm×10cm,10cm×10cm,ZSZ,15W,253.7nm;,.().200609225　()JournalofShenyangJianzhuUniversity(NaturalScience)　Sep.　2006Vol.22,No.51.2　.,.500mL0.5mL,0.891g,.2h,750mL.,1h.,300mg/L.-.1.3　300mg/L1.5L,(),Na2SO4,,..1mL,.2　2.1　pH,,10mA/cm2;Na2SO46g/L,35mL/min,pH,1.1　pH　　1,pH1.5～5.5,.,pH,;pH2.5,80.4%.pH,;pH5.5,30%;pH2.5.Fe2+Fe3+,,Fe3+.Fenton[10].2.2　pH2.5,Na2SO46g/L,35mL/min,,,2.2　　　2,,,,,H2O2,4mA/cm210mA/cm2,60min,45%88.7%,8mA/cm2,,,,,,H2O2.8mA/cm2.2.3　pH2.5,8mA/cm2,Na2SO46g/L,35mL/min,,,3.3　　　3,810　　()22,,10%～15%.:(1),,,,,,.-Fenton;(2)Fenton,.Fenton,Fenton,,.CO2、H2O;(3)Fe2+,.3　　(1)-Fenton,85%,,,.(2)pH.:,pH2.5、8mA/cm2.(3)、、CO2、H2O.:[1]　.[M].:,1993.[2]　.[M].:,1995.[3]　GandiniD,MaheE,MichaudPA,eta1.Oxidationofcarboxylicacidsatboron-dopeddiamandelectrodesforwastewatertreatment[J].ApplElectrochem,2000,(30):1345-1350.[4]　YangCH,LeeCC,WenTC.Hypochloritegener-tiononRu-Ptbinaryoxidefortreatmentofdyewastewater[J].ApplElectrochem,2000,(30):1043-1051.[5]　ShenZ,WangW,JiaJ,etal.CatalyticallyassistedelelctrochemicaloxidationofdyeredB[J].WaterEn-vironRes,2002,(74):117-121.[6]　,,,.-Fenton[J].:,2005,21(6):723-725.[7]　BandaraJ,MielczarskiJA,LopezA,etal.Sensitizeddegradationofchlorophenolsonironoxidesinducedbyvisiblelightcomparisonwithtitaniumoxide[J].AppliedCatalysisB:Environmental,2001,(34):321-333.[8]　HsiaoY.NobeK.OxidativereactionsofphenolandchlorobenzenewithinsitUelectrogeneratedFentonSreagent.Chem.Eng.Common,1993,126(1):97-110.[9]　HuangYaohui.ChouShanshan.PerngMing-Gingetal.Casestudyonthebioeffluentofpetrochemicalwastewaterbyelectro-Fentonmethod[J].WaterSci.Technology,1999,39(10-11):145-149.[10]　,.-Fenton4-[J].,2004,5(10):56-59.TreatmentofNitrobenzeneWastewaterbyUV/E-FentonTechniqueandtheStudyontheAffectingFactorsBANFuchen,LIYafeng,JIAXinjun,ZHAONa(SchoolofMunicipalandEnvironmentalEngineeringShenyangJianzhuUniversity,Shengyang,China,110168)Abstract:Thestudyaimstofindoutaneconomicandeffectivetreatmentprocessforthenitrobenzenewastewater.Basedontheprincipleofelectrolysis,theelectrobathismadeupofiron-anodeandboredgraphite-cathode,meanwhiletheairissenttothecathodeandUVrayisusedintheexperiment.H2O2electrolysedfromcathodeandFe2+comeintotheFentonreagent,whichoxidatesorganiccompoundbyac-tive·OH.TheresultshowsthatpHaffectstheremovalrateofnitrobenzenemostlyinalltheoptimumopera-tionparameters,andwhenpHis2.5andtheelectrolysiscurrentdensitiesis8mA/cm2,thedegradationre-actioncompleteswithin60minuteswithover88%ofnitrobenzeneremoval.SoUV/E-Fentonisaspeedy,economicandeffectivemethodforthetreatmentofhighconcentrationandvirosewastewater,andwhichismeaningfulforthetreatmentofotherkindsofwastewater.KeyWords:nitrobenzene;UV/E-Fenton;movedefficiency22:-Fenton811