Optimization of europium transport through a supported liquid membrane containing Cyanex 272 using response surface methodology

摘要

In this study,the transport of europium(Eu~(3+))was investigated using bis(2,4,4-trimethylpentyl)phosphinic acid(Cyanex 272)extractant in a supported liquid membrane(SLM)system.The effect of various parameters such as feed phase pH,extractant concentration,and stripping phase concentration was investigated with response surface methodology(RSM).At the optimum conditions,membrane permeability of 2.35×10~(-5)m s~(-1)was obtained.The results demonstrated that the transfer kinetics follow a first-order model.Examination of SLM stability showed that the membrane used was stable for six runs,and permeability did not change significantly.The permeability and stability of the membrane decreased with the increment of the membrane pore size.Examination of the separation of dysprosium(Dy~(3+))and Eu~(3+)with the Taguchi method showed that feed pH has the most significant effect on the separation factor.