CIESC Journal ›› 2011, Vol. 19 ›› Issue (1): 33-39.

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Separation of Eu3+ Using a Novel Dispersion Combined Liquid Membrane with P507 in Kerosene as the Carrier

裴亮1,2, 王理明2, 付兴隆2   

  1. 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
  • 收稿日期:2010-03-22 修回日期:2010-09-11 出版日期:2011-02-28 发布日期:2011-02-28
  • 通讯作者: PEI Liang, E-mail: pellys_0311@163.com
  • 基金资助:
    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)

Separation of Eu3+ Using a Novel Dispersion Combined Liquid Membrane with P507 in Kerosene as the Carrier

PEI Liang1,2, WANG Liming2, FU Xinglong2   

  1. 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
  • Received:2010-03-22 Revised:2010-09-11 Online:2011-02-28 Published:2011-02-28
  • Supported by:
    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 Eu3+ 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 Eu3+ 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 1.48×10-7m2·s-1 and 36.6μm,respectively.The results obtained are in good agreement with literature data.

关键词: dispersion combined liquid membrane, 2-ethyl hexyl phosphonic acid-mono-2-ethyl hexyl ester, separation, europium3+

Abstract: The separation of Eu3+ 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 Eu3+ 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 1.48×10-7m2·s-1 and 36.6μm,respectively.The results obtained are in good agreement with literature data.

Key words: dispersion combined liquid membrane, 2-ethyl hexyl phosphonic acid-mono-2-ethyl hexyl ester, separation, europium3+