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Cr(),,,(,510006)[](TBAC)Cr(),、pH、、、,,TBACCr()1∶2。5mol/LCr(),97%,。[]Cr();;[]X703[]A[]1005-829X(2011)09-0019-03Recoveryofchromium()fromelectroplatingwastewaterbysolventextractionLiangRu,LiuGuoguang,LüWenying,SunBin(FacultyofEnvironmentalScienceandEngineering,GuangdongUniversityofTechnology,Guanzhou510006,China)Abstract:Tetrabutylammoniumchlorine(TBAC)hasbeenusedforextractingCr().Theeffectsoffactors,suchasdiluent,aqueousphasepH,extractingagentconcentration,aqueousphasevolume,durationofextractionoscilla-tion,etc.ontheextractionresultsareinvestigated.Theoptimumextractionconditionsareobtained.ThemoleratioofTBACtotheextractedchromium()intheextractanthasbeenfoundtobe1to2.Theorganicphaseofchromium()loadedisstrippedasCrO42-byusing5mol/LNaOHsolution.Therateofback-extractionis97%.Afteritisconcentratedandcrystallized,itcanberecycledinformofNa2Cr2O7.Keywords:chromium();tetrabutylammoniumchlorine;electroplatingwastewaterCr()〔1〕,。〔2-3〕、〔4-5〕、〔6〕、〔7〕。;,;,,,。(TBAC),(MIBK)、、,Cr()。Cr()NaOH,,Na2Cr2O7。11.1:K2Cr2O7、、、、、,。:T6,;pHS-3CpH,;HZ-3,。1.22mL10000mg/LK2Cr2O7、1~12mL2%TBAC,H2SO4pH,15mL;10mL,()10min,,,,Cr()。Cr()ED:E=(C0-C1)/C0D=〔E/(1-E)〕×Vaq/Vorg:C0、C1———Cr()、Cr();Vaq、Vorg———、。[](2008ZX07211-005-03)31920119IndustrialWaterTreatmentVol.31No.9Sep.,20111922.14TBACCr(),1。1,MIBK、,MIBK(4h,Cr(),,MIBK),MIBK。12.2pHpH。pH<2,Cr()HCr2O7-、Cr2O72-、CrO42-:HCr2O7-Cr2O72-+H+Cr2O72-+H2O2CrO42-+2H+2<pH<6,Cr()H2CrO4、HCrO4-、CrO42-:H2CrO4HCrO4-+H+HCrO4-CrO42-+H+pH>8,Cr()〔8〕。pH,pH0.3~6,2。2pH2,pH,,pH<0.5,,pH0.5,97.5%。,SO42-,Cr()。2.3Cr(),pH0.5,〔9〕TBACCr(),3。3TBACCr()y=2.0138x+6.2348R2=0.9947,TBACCr()1∶2。:(CH3CH2CH2CH2)4N+Cl-(aq)+HCr2O7-(aq)(CH3CH2CH2CH2)4N+…HCr2O7-(org)2.4TBACMIBK,pH0.5,TBACCr(),4。4TBACCr()4,TBAC,;TBAC,Cr()。TBAC8mL,Cr()4000、7000mg/L→MIBK(org)pH=0.510min2011-09,31(9)2098.7%;10000mg/LCr(),TBAC10mL,98.7%。2.5MIBK,pH0.5,TBAC10mL,Cr(),1。11,,10min97.6%,,10min。2.6MIBK,pH0.5,TBAC10mL,10min,Cr(),5。55,。15mL,96.62%,40mL30.4%。15mL。2.7Cr(),NaOH、Na2SO3,Cr()。(1~5mol/L)NaOH、Na2SO3,1∶2(10mL),(30℃)10min,6。6:,,,5mol/L,NaOH97%,Na2SO3692.3%。Na2SO3Cr(),NaOH:TAB+…HCr2O7-+4NaOHTBA-OH+2Na2CrO4+2H2ONa2CrO430%pH2~3,Na+,,〔10〕。5mol/LNaOH。2.8Cr()9350mg/L,2mL,,。:Cr()318、244mg/L,96.6%97.4%;96.2%98.6%,。3(1)Cr(),;(2)pH0.5,,SO42-,Cr();(3)Cr(),TBA+HCr2O7-;(4)5mol/LNaOH,Na2SO3。[][1],.[J].,1997,15(3):11-12.[2]DonaisMK,HenryR,RettbergT.Chromiumspeciationusinganautomatedliquidhandlingsystemwithinductivelycoupledplasma-(25)/min51015202530/%95.897.697.697.697.797.710min→2011-09,31(9),:Cr()21。3(1)Fe2+-H2O2/O3DMP,,Fe2+H2O2O3,Fe2+-H2O2/O3TOCH2O2/O331.75%。(2)50mg/LDMP,pH10,H2O20.049mol/L,O31.82g/h,45min,DMP69.67%。[][1],,,.[J].,2003,19(2):199-200.[2],,.[J].,1997(12):16-19.[3],,,.[J].,2004,23(3):106-109.[4]BeltránFJ,Garcia-ArayaJF,AlvarezPM,etal.Aqueousdegrada-tionofatrazineandsomeofitsby-productswithozone/hydrogenper-oxide[J].JournalofChemicalTechnologyandBiotechnology,1998,71(4):345-355.[5],,,.O3/H2O2[J].,2006(5):593-597.[6],.Fenton[J].,2001(12):1-3.[7],,,.Fenton[J].,2000,21(3):93-96.[8]HoignéJ,BaderH.Theroleofhydroxylradicalreactioninozonationprocessesinaqueoussolutions[J].WaterResearch,1976,10(5):377-386.[9],.O3/H2O2[J].,2002,23(5):67-71.[10],,,.Fenton[J].:,2003,66(7):54.[](1986—),2008。:15972036461,E-mail:xudi811@yahoo.com.cn。:,E-mail:xds01@qq.com。[]2011-07-21()!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!massspectrometricdetection[J].Talanta,1999,49(5):1045-1050.[3]LanCR,TsengCL,YangMH,etal.Twostepcoprecipitationmethodfordifferentiatingchromiumspeciesinwaterfollowedbydetermina-tionofchromiumbyneutronactivationanalysis[J].Analyst,1991,116:35-38.[4]SubramanianKS.Determinationofchromium()andchromium()byammoniumpyrrolidinecarbodithioate-methylisobutylke-tone-furnaceatomicabsorptionspectrometry[J].AnalyticalChem-istry,1988,60(1):11-15.[5]WangZhihua,SongMing,MaQuanli,etal.Two-phaseaqueousex-tractionofchromiumanditsapplicationtospeciationanalysisofchromiuminplasma[J].MicrochimicaActa,2000,134(1/2):95-99.[6]IsozakiA,NarukawaT,OkutaniT.Determinationandseparationofchromium()andchromium()withettringitebyICP-AES[J].BunsekiKagaku,1995,44(2):111-115.[7],,.Cr()[J].,1994,14(5):295-297.[8]AnsariR.Applicationofpolyanilineanditscompositesforadsorp-tion/recoveryofchromium()fromaqueoussolutions[J].ActaChimicaSlovenica,2006,53(1):88-94.[9],.[M].:,1984:79-85.[10],.[M].:,1997:187-189.[](1986—),2008。:15014199318,E-mail:liangru001@163.com。[]2011-06-28()(21)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!,,。,450t,16t。4370t,80t。:20117,、、、,,,。()··2011-09,31(9),:Fe2+H2O2/O325
本文标题:萃取法回收电镀废水中的Cr梁儒
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