H2O2氧化法修复柴油污染土壤

H2O2孙燕英　刘　菲　陈鸿汉＊　何　炜(()　100083)　　20mLH2O2,pH。,24h,5%,pH5～8,96%,pH,,,;pH7.34、6.74、5.787.02、6.58、5.49,CO2、H+、、β-;H2O2,1h0.05mol/L0.0003mol/L,0;,,,、。　H2O2,,,:O621.2;X131.3　　　　　:A　　　　　:1000-0518(2007)06-0680-042006-07-19,2006-10-12(ZH104910540):,,,;E-mail:[e-mail];:,H2O2,。。,BTEX(、)、PAHs(、、、、(a)、(a))。Kang[1]H2O2BTEX,pH,3h97%。Nam[2]PAHs,。[3]H2O2。H2O2,,。,C9～C28,(CnH2n+2)、(CnH2n-2)、(CnH2n1CC)、(CnH2n-21CC)、(CnH2n-22CC)(C6H5R)。,(0.2%～6%)、(0.1%),。[4,5],,、、pH、、,,。H2O2,pH5～8,。1　1.1　-20#,0.83～0.87g/mL。()0～20cm,2mm,:0.3～0.45mm;4.91%;2.45%;1.42%;pH=8.4。30%H2O2,(CH2Cl2),(NaN3),H2SO4,(Na2SO4),。。8453();DAH2-300;pHS-3CpH。246Vol.24No.620076　　　　　　　CHINESEJOURNALOFAPPLIEDCHEMISTRY　　　　　　　June20071.2　50g,2.5g,,2g/kgNaN3,,,H2SO4(1mol/L)pH。5%()。1。1　Table1　ConditionsoftreatmentpHm(soil)/gm(oil)/gm(NaN3)/gV(H2O)/mLV(H2SO4)(1mol/L)/mLV(H2O2)(30%)/mL7.34502.50.1179.250.75206.74502.50.1157.522.5205.78502.50.11413920　　H2O2reagentwasnotdilutedduringoxidationreaction;Theexperimentof5mL,10mL,20mL,30mL,40mLH2O2dosages′seffectonremovalefficiencyofdieseloilinsoilindicatedthattheefficienciesforthelastthreewerehigherandapproximatedto71%.So20mLH2O2dosagewasavailable.H2O2;,;,,24h。,1mLNa2SO410mL,5mL,(25℃),160r/min2h,100μL,10mL5mL,。1.3　,,92%;H2O2[6]。2　2.1　pHpH7.34、6.74、5.78,20mLH2O2,5%1。,3pH96%。,,10h。,pH,,,。1　pHFig.1　EffectofpH-valueontheremovalefficiencyofoilpH:a.5.78;b.6.74;c.7.342　H2O2Fig.2　VariationoftheH2O2contentpH:△5.78;□6.74;◇7.34pH7.34、6.74、5.787.02、6.58、5.49。[7]。681　6:H2O2,HSO-4SO2-4,pH。CO2、H+、、β-[8]。2.2　H2O22H2O2。H2O20.05mol/L,1h0.0003mol/L,0,pH7.34、6.74、5.78,H2O21h,。H2O2,。H2O2[9,10]。H2O2,,H2O2。2.3　3A3B。,。pH5.78、6.741h,,,10h;pH7.341h,2h,10h。3pH,10h。,pH7.34、6.74、5.78310h,10h。3　Fig.3　VariationoftheoilcontentpH:a.5.78;b.6.74;c.7.34,,。,,,,,。1,,,。　　　　1　KangN,HuaI.Chemosphere[J],2005,61(7):909　2　NamK,RodriguezW,KukorJJ.Chemosphere[J],2001,45(1):11　3　WEIDe-Zhou(),QINYu-Min().ChineseEnvironSci(中国环境科学)[J],1997,17(5):429　4　WattsRJ,DillySE.JHazardMater[J],1996,51:209　5　FergusonSH,WoinarskiAZ,SnapeI,MorrisCE,RevillAT.ColdRegSc[J],2004,40:47　6　KolthoffIM,SandellEB,MeehanEJ,Auths().TeachingandResearchGroupofAnalyticalChemistryinNanjingU-niversityofTechnology()Trans().QuantitativeChemicalAnalysis()[M].Beijing():HighEducationPress(),1987:1127682　　　　　　　　　　　　　　　　　　　24　　7　Gates-AndersonDD,SiegristRL,ClineSR.JEnvironEng[J],2001,127:337　8　ChenG,HoagGE,CheddaP,NadimF,WoodyBA,DobbsGM.JHazardMater[J],2001,B87:171　9　WattsRJ,KongS,DippreM,BarnesWT.JHazardMater[J],1994,41:105　10　WattsRJ,StantonPC.WaterRes[J],1999,33:1405RemediationofDiesel-contaminatedSoilbyHydrogenPeroxideOxidationTechnologySUNYan-Ying,LIUFei,CHENHong-Han＊,HEWei(BeijingKeyLaboratoryofWaterResourcesandEnvironmentalEngineering,ChinaUniversityofGeoscience,Beijing100083)Abstract　Heavilydiesel-contaminatedsoilwasoxidizedwithhydrogenperoxide.TheeffectofpHvalueofthesoilwithsuper-saturatedwateronthereactionwereinvestigated.Theresultsshowthatmorethan96%ofthedieselwasdegradedwithin24hwhenpHwasabout5～8forthesoilwith5%initialoilcontent.ThepHofthesoilsolutionsreducedfrom7.34,6.74,5.78to7.02,6.58,5.49respectivelythroughoutthereaction,whichcouldbeattributedmainlytothegenerationofacidspeciessuchasCO2,H+,carboxylic,andβ-ketoacids.TheH2O2concentrationinthesoilsolutiondecreasedgreatlyfrom0.05mol/Ltocloseto0after1h.Thedieselcontentinthesurfacelayervariedbutdecreasedingeneral,whilethedieselcontentintheunderlayerdeclinedgreatly,showingthatthedecomposition,volatilizationandmovementfrombottomtotopofdieselcomponentsoccurredduringtheoxidationreaction.Keywords　hydrogenperoxideoxidation,heavilydiesel-contaminatedsoil,oilremovalefficiency,initialoilcontent《》《》,,。200781619。,。,,1(:2007515。:,5625,:130022。/:0431-85262430,:[e-mail])。(600)。()。683　6:H2O2