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化学学报
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化学学报 ›› 2011, Vol. 69 ›› Issue (13): 1553-1558. 上一篇    下一篇

研究论文

含载体D2EHPA的更新型支撑液膜体系对三价钆的分离

裴亮*,1,3, 王理明2,3, 郭维2, 赵楠3   

  1. (1中国科学院地理科学与资源研究所 陆地水循环及地表过程重点实验室 北京 100101)
    (2西安工程大学环境与化学工程学院 西安 710048)
    (3西安理工大学水利水电学院 西安 710048)
  • 投稿日期:2010-10-20 修回日期:2011-02-14 发布日期:2011-03-03
  • 通讯作者: 裴亮 E-mail:pellys_0311@163.com
  • 基金资助:

    国家自然科学基金;中国科学院西部行动计划项目;西安理工大学优秀博士学位论文研究基金;西安理工大学优秀博士学位论文研究基金

Separation of Trivalent Gadolinium with Renewal Supported Liquid Membrane System Containing D2EHPA as Flowing Carrier

Pei Liang*,1,3; Wang Liming2,3; Guo Wei2; Zhao Nan3   

  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)
    (2 School of Environment and Chemistry Engineering, Xian Polytechnic University, Xian 710048)
    (3 Faculty of Water Resources and Hydraulic Power, Xian University of Technology, Xian 710048)
  • Received:2010-10-20 Revised:2011-02-14 Published:2011-03-03
  • Contact: PEI Liang E-mail:pellys_0311@163.com

PDF

795

被引次数

8

研究了以聚偏氟乙烯膜为支撑体, 二-(2-乙基己基)磷酸(D2EHPA)为流动载体, 煤油和D2EHPA的混合溶液作为膜溶液, 膜溶液和解析剂HCl溶液组成更新相的更新型支撑液膜(RSLM)中Gd(III)的分离行为|考察了料液pH、更新相HCl浓度、膜溶液与HCl溶液体积比、不同载体浓度对Gd(III)分离的影响, 得出了Gd(III)最优分离条件为: 更新相HCl溶液浓度4.00 mol/L, 膜溶液与HCl溶液体积比4∶3, 载体浓度控制在0.160 mol/L, 料液相中pH为4.80. 在最优分离条件下, 当Gd(III)的初始浓度为1.00×10－4 mol/L时, 35 min Gd(III)分离率达到95.7%. 最后根据传质定律和界面化学理论提出了Gd(III)在RSLM中的传质动力学方程.

关键词: 更新型支撑液膜, 二-(2-乙基己基)磷酸, 钆(III), 更新相

Using polyvinylidene fluoride membrane (PVDF) as a support, kerosene as a membrane solvent, di(2-ethylhexyl) phosphoric acid (D2EHPA) as a flowing carrier, the Gd(III) separation in a renewal supported liquid membrane (RSLM) was investigated. The effects of pH in the feed phase, volume ratio of membrane solution to HCl solution, concentration of HCl solution and concentration of carrier in the renewal phase on separation of Gd(III) have also been studied, respectively. As a result, the optimum separation conditions of Gd(III) were obtained as that concentration of HCl solution was 4.00 mol/L, concentration of D2EHPA was 0.160 mol/L, and volume ratio of membrane solution to HCl solution was 4∶3 in the renewal phase, and pH was 4.80 in the feed phase. When initial concentration of Gd(III) was 1.00×10－4 mol/L, the separation rate of Gd(III) was up to 95.7% in 35 min. The kinetic equation of Gd(III) separation in RSLM was developed in terms of the law of mass diffusion and the theory of interface chemistry.

Key words: renewal supported liquid membrane, di(2-ethylhexyl) phosphoric acid, gadolinium(III), renewal phase