Selective transport of metal ions through cation exchange membrane in the presence of a complexing agent

Determination of Optimal Conditions for Separation of Metal Ions Through Membrane Dialysis/Electrodialysis Using Statistical Experimental Methods

“…One of the prominent features in the development of modern technology is the cross-fertilization of ideas among different disciplines (Sata, 1991). Therefore, separation processes combined use of complex agents with cation exchange membrane for the recovery and the enrichment of heavy metal ions have received much attention in recent years (Hopfenberg et al, 1978;Huang & Wang, 1993a;Kojima et al, 1982;Kojima et al,1991). Dialysis is a membrane based separation process in which the concentration gradient across the membrane is the driving force resulting in a flow of material from one side of the membrane to the other.…”

Preferential transport behaviors of ternary system cupric–nickel–zinc ions through cation-exchange membrane with a complexing agent by dialysis

“…Based on to the Nernst-Planck diffusion equation, the transport flux of ion i can be expressed as the following [9][10][11]. For the metal ions and counter ion i, the transport flux is…”

“…agents had been studied in our previous researches [8][9][10][11]. The experimental results show that the uptake of metal ions in the cation-exchange membrane can be changed by adding a complexing agent in the solution phase, and both the anion ligands and the kinds of metal ions can differentiate the equilibrium uptake of metal ions so as to increase the membrane selectivity of the metal ions.…”

In Separation and Purification

“…This process is also the most economical for water with a low salt concentration ( < 5000 ppm). ED is also used for the production of potable water [87] .…”