201113 69,15531558 ACTACHIMICASINICA Vol.69,2011No.13,15531558 D2EHPA *,a,c (a(b(c b,c b c 710048)710048) 100101) ,HClHCl HClHCl4.00mol/L,,Gd(III)Gd(III)RSLM ;-(2- ,-(2- )(D2EHPA) (RSLM) Gd(III) HCl 43, 1.00104mol/L,35minGd(III) . );(III); , D2EHPA Gd(III) ; , Gd(III) 0.160mol/L, pH 95.7%. pH:4.80. SeparationofTrivalentGadoliniumwithRenewalSupportedLiquidMembraneSystemContainingD2EHPAasFlowingCarrier Pei,Liang*,a,cWang,Limingb,cGuo,WeibZhao,Nanc (aKeyLaboratoryofWaterCycleandRelatedLandSurfaceProcesses,InstituteofGeographicSciencesandNaturalResourcesResearch,ChineseAcademyofSciences,Beijing100101) (bSchoolofEnvironmentandChemistryEngineering,Xi'anPolytechnicUniversity,Xi'an710048)(cFacultyofWaterResourcesandHydraulicPower,Xi'anUniversityofTechnology,Xi'an710048) AbstractUsingpolyvinylidenefluoridemembrane(PVDF)asasupport,keroseneasamembranesolvent,di(2-ethylhexyl)phosphoricacid(D2EHPA)asaflowingcarrier,theGd(III)separationinarenewalsupportedliquidmembrane(RSLM)wasinvestigated.TheeffectsofpHinthefeedphase,volumeratioofmembranesolutiontoHClsolution,concentrationofHClsolutionandconcentrationofcarrierintherenewalphaseonseparationofGd(III)havealsobeenstudied,respectively.Asaresult,theoptimumseparationconditionsofGd(III)wereobtainedasthatconcentrationofHClsolutionwas4.00mol/L,concentrationofD2EHPAwas0.160mol/L,andvolumeratioofmembranesolutiontoHClsolutionwas43intherenewalphase,andpHwas4.80inthefeedphase.WheninitialconcentrationofGd(III)was1.00104mol/L,theseparationrateofGd(III)wasupto95.7%in35min.TheicequationofGd(III)separationinRSLMwasdevelopedintermsofthelawofmassdiffusionandthetheoryofinterfacechemistry.Keywordsrenewalsupportedliquidmembrane;di(2-ethylhexyl)phosphoricacid;gadolinium(III);renewalphase *E-mail:pellys_0311@ ReceivedOctober20,2010;revisedFebruary14,2011;eptedMarch3,2011. (Nos.41001131,51009126) (Nos.602-210805,602-210804) . (No.KZCX2-XB2-13) PDF文件使用"pdfFactoryPro"试用版本创建 1554[1]. ,. .,,.(Gd),, , , , , [2]. , , . 20 80 . , LA,PC-88A,P204, HNO3,H2SO4. [3]. , (SLM) , , ( ) [46]. SLM , , , SLM , , , SLM . [7] , (Renewalsupportedliquidmembrane,RSLM) . , RSLM Gd(III) . RSLMGd(III) , Gd(III), , RSLM

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3 3.1 HCl Gd(III) HCl Vol.69,2011 , HCl Gd(III) .HCl , , Gd(III) .HCl , , Gd(III) . HCl Gd(III) . pH4.00,Gd(III) 1.00 104mol/L, HCl 4.00mol/L, 0.160mol/L, HCl Gd(III) 3.07 SLM , RSLM SLM . 61,5243 , 43 91.3%( : Gd(III) Gd(III) ). , HCl 43 .
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1. 18.8µm. References 1Yu,
J.;Yao,
S.T.;Chi,
S.J.;Sun,
Y.R.J.ShenyangPoly- tech.Univ.1999,21,83(inChinese). (, , , , , 1999,21,83.) 2Liu,
W.H.;Liu,
P.Y.Chin.J.Anal.Lab.2002,21,89(in Chinese). ( , , ,2002,21,89.) 3Zhang,
R.H.;Jiang,
D.X.Membr.Sci.Technol.1985,5,70 (inChinese). ( , , ,1985,5,70.) 4Yu,
X.J.;Yao,
B.H.;Zhou,
X.D.;Zheng,
H.L.;Zhang,
J.
F.Spectrosc.SpectralAnal.2009,29,1967(inChinese). ( , , , , , ,2009,29,1967.) 5Pei,
L.;Yao,
B.H.;Zhang,
C.J.Sep.Purif.Technol.2009, 65,220. 6Pei,
L.;Yao,
B.H.;Fu,
X.L.J.RareEarths2009,27,447. 7Sonawane,
J.V.;Pabby,
A.K.;Sastre,
A.M.J.Membr.Sci. 2007,300,147. 8Yu,
X.J.Ph.D.Dissertation,Xi'anUniversityofTechnol- ogy,Xi'an,2008,p.87(inChinese). ( , , , ,2008,p.87.) 9Danesi,
P.R.;Horwitz,
E.P.;Vandegrift,
G.F.;Chiarizia,
R.Sep.Sci.Technol.1981,16,202. 10He,
D.S.;Luo,
X.J.;Yang,
C.M.;Ma,
M.;Wan,
Y.De- salination2006,194,40. 11Danesi,
P.R.Sep.Sci.Technol.1984,19,857. 12Danesi,
P.R.;Horwitz,
E.P.;Rickert,
P.G.Sep.Sci.Tech- nol.1982,17,1183. 13Chiarizia,
R.;Castagnola,
A.;Danesi,
P.R.;Horwitz,
E.P.J. Membr.Sci.1983,14,
1. 14Danesi,
P.R.;Vandegrift,
G.F.J.Phys.Chem.1981,85,36. (A1010203Cheng,
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