Separation of Trivalent Samarium through Facilitated Stripping Dispersion Hollow Fiber Liquid Membrane Using p204 as Mobile Carrier.pdfVIP
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Separation of Trivalent Samarium through Facilitated Stripping Dispersion Hollow Fiber Liquid Membrane Using p204 as Mobile Carrier.pdf
FULLPAPER
SeparationofTrivalentSamarium throughFacilitatedStripping
DispersionHollow FiberLiquidMembraneUsingp204as
MobileCarrier
Pei,Liang 。(裴亮) Wang,Liming。(王理明) Guo,Wei。(郭维)
KeyLaboratoryofWaterCycleandRelatedLandSurfaceProcesses,InstituteofGeographicSciencesand
NaturalResourcesResearch,ChineseAcademyofSciences,Beijing100101,China
SchoolofEnvironmentandChemistryEngineering,XianPolytechnicUniversity,Xian,Shaanxi710048,China
FacultyofWaterResourcesandHydraulicPower,XianUniversiytofTechnology,Xian,Shaanxi710048,China
TheseparationofSm(III)throughstrippingdispersionhollow fiberliquidmembranesystem (SDHFLM)con—
tainingfeedphaseaddingacetatebuffersolutionanddispersionsolutionwim HClsolutionasthestrippingsolution
andmembranesolutionofdi(2一ethylhexy1)phosphoricacid(p204)dissolvedinkerosene.hasbeenstudied.Asetof
factorswerestudied,includingpHvalue.initia1concentrationofSm(III)anddifferentionicstrengthoffeedphase,
volumeratioofmembranesolutionandstrippingsolution(O,W),HC1concentration,carrierconcentration,different
strippingagentsofdispersionphaseonSm(III)separation.Experimentalresultsindicatethattheoptimum sepraa—
tionconditionsofSm(III)wereobtainedas血atHClconcentrationwas4.00mol/L.p204concentrationwas0.15O
mo1/L,andvolumeratioofmembranesolutionandstrippingsolution (O,W)was1.00inthedispersionphase,and
pHvaluewas4.6Ointhefeedphase.IonicstrengthhadnoobviouseffectonsepraationofSm(III).Wheninitial
Sm(III)concentrationwas1.0OXl0 molL/.hteseparationrateofSm(III)wasuDt093.5%in85min.Thekinetic
equationwasdevelopedinterms
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