Separation of Eu^3＋ Using a Novel Dispersion Combined Liquid Membrane with P507 in Kerosene as the Carrier  

作　　者：裴亮 王理明 付兴隆 

机构地区：[1]Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China [2]Faculty of Water Resources and Hydraulic Power, Xi'an University of Technology, Xi'an 710048, China

出　　处：《Chinese Journal of Chemical Engineering》2011年第1期33-39,共7页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China（90401009）; the Foundation for Planning Project of West Action of Chinese Academy of Sciences（KZCX2-XB2-13）; the Research Fund for Excellent Doctoral Thesis of Xi’an University of Technology（602-210805）

摘　　要：The separation of Eu^3 ＋is studied with a dispersion combined liquid membrane（DCLM）,in which polyvinylidene fluoride membrane（PVDF）is used as the liquid membrane support,dispersion solution containing HCl solution as the stripping solution,and 2-ethyl hexyl phosphonic acid-mono-2-ethyl hexyl ester（P507）dissolved in kerosene as the membrane solution.The effects of pH value,initial concentration of Eu3 ＋and different ionic strength in the feed phase,volume ratio of membrane solution to stripping solution,concentration of HCl solution, concentration of carrier,different stripping agents in the dispersion phase on the separation are investigated.The optimum condition for separation of Eu3 ＋is that concentration of HCl solution is 4.0 mol·L 1,concentration of carrier is 0.16 mol·L 1,and volume ratio of membrane solution to stripping solution is 30︰30 in the dispersion phase, and pH value is 4.2 in the feed phase.The ionic strength has no significant effect on separation of Eu3 ＋.Under the optimum condition,when the initial concentration of Eu3 ＋is 0.8×10 4mol·L 1,the separation percentage of Eu 3＋is 95.3%during the separation time of 130 min.The kinetic equation is developed in terms of the law of mass diffusion and the theory of interface chemistry.The diffusion coefficient of Eu3 ＋in the membrane and the thickness of diffusion layer between feed phase and membrane phase are obtained and their values are 1.48×10 7m 2·s 1and 36.6μm,respectively.The results obtained are in good agreement with literature data.Eu3+的分离与分散被学习联合液体膜( DCLM )，在哪个 polyvinylidene 氟化物膜( PVDF )被用作液体膜支持，是的分散答案包含 HCl 答案脱衣的答案，并且2乙醇己基的酉旨( P507 )作为膜答案在煤油溶解了的己基的磷的 acid-mono-2-ethyl 。pH 价值， Eu3+ 的起始的集中和在 feed 的不同离子的力量的效果分阶段执行，剥去解决方案的膜答案的卷比率， HCl 答案的集中，搬运人的集中，在分离上的分散阶段的不同脱衣代理人被调查。为 Eu3+ 的分离的最佳条件是 HCl 答案的集中是 4.0 摩尔吗？？

关 键 词：dispersion combined liquid membrane 2-ethyl hexyl phosphonic acid-mono-2-ethyl hexyl ester SEPARATION europium3 ＋ 

分 类 号：O657.71[理学—分析化学] O614.33[理学—化学]