采用疏水性聚丙烯中空纤维作膜器、冠醚DB18C6作萃取剂、离子液体[Bmim][PF6]作稀释剂，构建了新型的离子液体－中空纤维封闭液膜体系，通过正交试验并以直接萃取方法为参照探索其用于回收Cs+的性能。实验结果显示，该液膜体系可以实现从料液回收Cs+，且其中“经管程”操作模式的Cs回收效率优于“经壳程”模式。初步的条件实验显示该膜体系具有可调性，且适用于痕量Cs的分离回收。本实验成果为进一步加密实验条件、优化液膜体系性能奠定了基础，也为发展高效的Cs(Ⅰ)  分离回收方法提供一定参考。

Facilitated transport of Cs(I) from aqueous nitrate feed solutions to a receiver solution through a novel liquid membrane using Ionic liquid [Bmim][PF6] as diluents was investigated. The ionic liquid membrane phase containing DB18C6 as carrier was flowing in hollow fiber module. The recovery efficiency of Cs+ was higher while the ionic liquid membrane phase circulating in the inner side of hollow fiber than circulating in the shell side. The influence of the concentration of Cs+ and H+ in feed, H+ in trip phase and carrier was then analyzed by L9(34) table in order to establish the optimal condition parameter. Primary result concluded that this hollow fiber contained [Bmim][PF6] as membrane phase system was suitable for enriching tracer Cs and can be tuned by transferring parameter value for higher efficiency. This achievement shows a good potential for improving Cs＋ separation processs.

[1] Seda K, Defne Kayrak-Talay, U?ur A, et al. A review of ionic liquids towards supercritical fluid applications[J]. J Supercrit Fluid, 2007.
[2] Huimin L, Sheng D, Peter V B, et al. Extraction of Cesium ions from aqueous solutions using calyx[4]arene-bis(tert-octylbenzo-crown-6) in ionic liquids[J]. Anal Chem, 2004,76: 3078-3083.
[3] Huimin L, Sheng D, Peter V B. Solvent extraction of Sr2+ and Cs+ based on room-temperature ionic liquids containing monoaza-substituted crown ethers. Anal Chem, 2004, 76: 2773-2779. 
[4] Huimin L, Sheng D, Peter V B, et al. Separation of fission products based on ionic liquids: Task-specific ionic liquids containing an aza-crown ether fragment [J]. J Alloys and Compounds, 2006,418:195-199.
[5] 张仲甫,张瑞华,汪德先.用液膜技术浓缩和分离稀土溶液[J]. 膜科学与技术, 1986, 6(1): 41-47.
[6] 黄万抚,王淀佐.液膜技术提取稀土的试验研究[J]. 膜科学与技术, 1998,18(6): 19-21.
[7] 黄炳辉,黄培刚,汪德先,等.用液膜技术处理稀土废水[J]. 膜科学与技术, 2004, 2(45): 74-76.
[8] 王文才,蔡嗣经,黄万抚.乳化液膜技术分离提取Cu2+的应用研究进展[J].膜科学与技术, 2004, 2(46): 57-60.
[9] Raut D R, Mohapatra P K, Manchanda V K, et al. Evaluation of a calyx[4]-bis-crown-6 ionophore-based supported liquid membrane system for selective 137Cs transport from acidic solutions[J]. J Membr Sci, 2008, 310: 229-236.
[10] Mohapatra P K, Lakshmi D S, Manchanda V K. Diluent effect on Sr(Ⅱ) extraction using di-tert-butyl cyclohexano 18 crown 6 as the extractant and its correlation with transport dataobtained from supported liquid membrane studies[J]. Desalination, 2006, 198: 166-172.
[11] 陈姆妹,罗顺忠,钟文彬.离子液体－中空纤维支撑液膜分离Cs/Mo研究[J].广州化工，2009,37(8):135-137.