电Fenton法处理五氯硝基苯废水班福忱

　　:2005-04-10:(03-2-068):(1976-),,,.:1671-2021(2005)06-0723-03-Fenton班福忱,李亚峰,胡俊生,贾新军(,110168)　:.为了探讨一种经济且有效的含有五氯硝基苯(PCNB)废水的处理方法.根据电解原理,实验以活性炭纤维作为阴极,以廉价的铁板作为阳极,并向阴极不断通入空气,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OH的强氧化作用来氧化降解废水中的有机物.试验表明,电-Fen-ton法适用于处理质量浓度较高、且有毒性的废水,同时对其他工业废水的处理具有借鉴意义.在电-Fenton法处理五氯硝基苯各实验参数中,pH值对五氯硝基苯去除率的影响为最大.当在pH值为3,电解时间为60min,电流密度为17.26(A·m-2)的试验条件下,五氯硝基苯迅速降解,去除率可以达到90%以上.:-Fenton;;;:X703　　　:A　　　　　,[1～3]。FentonFe2+H2O2.H2O2Fe2+(·OH),2.8V,.CO2,,“”。Fenton,Fe2+,Fe2+[4～10]。,,,,,Fenton,Fenton,,Fenton.、,.1　1.1　1L,pH、、,,,;pH、、、,,,.1.2　,30cm×20cm×10cm.20cm×10cm;20cm×10cm;();722();Na2SO4();().2　,:;pH;;.200511216　()JournalofShenyangJianzhuUniversity(NaturalScience)　Nov.　2005Vol.21,No.64.,:pH;;;.3　3.1　pH140mg/L,80min.,pH,pH1～12.1.1　pH　　1,,pH,;pH3,pH,;,;,,.,H2O2,,H2O2,,.pH,OH-,OH-,Fe(OH)3.Fe(OH)3,,[11].pH3.3.2　pH3、,2.　　2,,.,,,,,..2　3.3　140mg/L,pH3,-Fenton,3.3　　　3,-Fenton,90%,,,,,.,60min,,,.,,pH,Fe2+,Fenton,[12].,60min.3.4　140mg/L,pH3,4.4　724　　()21　　4,,.,,.,H+,H2O2.,,17.26(A·m-2).4　　(1)-Fenton,pH.(2)pH3、60min,17.26(A·m-2),,90%.(3)-Fenton、;,、、.:[1]　GandiniD,MaheE,MichaudPA,eta1.Oxidationofcarboxylicacidsatboron-dopeddiamandelectrodesforwastewatertreatment[J].ApplElectrochem,2000,(30):1345-1350.[2]　YangCH,LeeCC,WenTC.Hypochloritegener-tiononRu-Ptbinaryoxidefortreatmentofdyewastewater[J].ApplElectrochem,2000,(30):1043-1051.[3]　ShenZ,WangW,JiaJ,eta1.CatalyticallyassistedelelctrochemicaloxidationofdyeredB[J].WaterEn-vironRes,2002,(74):117-121.[4]　,,.[J].,2003,25(12):38-40.[5]　,,,.[J].,2002,28(2):26-29.[6]　,,,.[J].,1997,18(6):31-34.[7]　,,,.Fenton[J].(),2002,21(4):354-357.[8]　BandaraJ,MielczarskiJA,LopezA,eta1.Sensitizeddegradationofchlorophenolsonironoxidesinducedbyvisiblelightcomparisonwithtitaniumoxide[J].AppliedCatalysisB:Environmental,2001,(34):321-333.[9]　VenturaA,JacquetG,BermondA,eta1.Electro.chemicalgenerationoftheFentonSreagent:Applica-tiontoatrazinedegradation[J].WaterResearch,2002,(36):517-522.[10]　,.-Fenton4-[J].,2004,5(10):56-59.[11]　,,,.Fenton[J].,2004,24(3):39-40.[12]　,.-Fenton[J].,2004,(4):34-35.TreatmentofPCNBWastewaterbyE-FentonTechniqueBANFu-chen,LIYa-feng,HUJun-sheng,JIAXin-jun(SchoolofMunicipalandEnvironmentalEngineering,ShenyangJianzhuUniversity,Shenyang,China110168)Abstract:InordertofindoutaneconomicalandeffectivetreatmentprocessforthePCNBwastewater,thestudyonthetreatmentofPCNBwastewaterbyE-Fentondegradingprocessiscarriedoutbasedontheprin-cipleofelectrolysis.Theelectrobathismadeupofiron-anodeandACF-cathode,meanwhiletheairblowsin-tothecathode.H2O2electrolysedfromcathodeandFe2+formtheFentonreagent,whichisusedtooxidizeorganiccompoundsbyactive·OH.TheresultshowsthatpHaffectstheremoverateofPCNBmostinalltheoptimumoperationparameters.WhenpHis3andtheelectriccurrentdensityis17.26(A/m2),thedegrada-tionreactioncompleteswithin60minuteswithover90%ofPNCBremoval.E-Fentonisaspeedy,economi-calandeffectivemethodforthetreatmentofhighconcentratedandvirosewastewater,whichismeaningfulforthetreatmentofotherkindsofwastewater.KeyWords:E-Fenton,degradation,movedefficiency,pentachloro-nitrobenzenefolosan(PCNB)21:-Fenton725