%0 Journal Article
%T La(III)TransportinDispersionSupportedLiquidMembraneIncludingPC-88AastheCarrierandHClSolutionastheStrippingSolution
%A 裴亮
%A 姚秉华
%A 付兴隆
%A 王理明
%J 过程工程学报
%D 2008
%X ThetransportofLa(III)throughadispersionsupportedliquidmembranewithpolyvinylidenefluoridemembraneastheliquidmembranesupportanddispersionsolutionincludingHClsolutionasthestrippingsolutionand2-ethylhexylphosphonicacidmono-2-ethylhexylester(PC-88A)inkeroseneasthemembranesolution,wasstudied.Asaresult,theoptimumtransportconditionsofLa(III)wereobtainedasthatconcentrationofHClsolutionwas4.0mol/L,concentrationofPC-88A0.16mol/L,andvolumeratioofmembranetostrippingsolution3030inthedispersionphase,andpHvalue4.0inthefeedphase.IonicstrengthhadnoobviouseffectonthetransportofLa(III).Undertheoptimumconditions,wheninitialconcentrationofLa(III)was0.8′10-4mol/L,thetransportratewasupto96.3%duringthetransporttimeof125min.Thekineticequationwasdevelopedbasedonthelawofmassdiffusionandtheoryofinterfacechemistry.ThediffusioncoefficientofLa(III)inthemembraneandthethicknessofdiffusionlayerbetweenfeedandmembranephaseswereobtainedas3.20′10-7m2/sand3.22′10-5m,respectively.Thecalculatedresultswereingoodagreementwithexperimentalresults.
%K liquidseparation
%K dispersionsupportedliquidmembrane
%K 2-ethylhexylphosphonicacidmono-2-ethylhexylester
%K lanthanum(III)
%U http://www.jproeng.com/qikan/Cpaper/zhaiyao.asp?bsid=14679