1987 Volume 20 Issue 1 Pages 34-40
The concentration of cupric ion was studied with a flat-plate dialyzer having a single cation exchange membrane. The exchange equilibrium constants were expressed as a function of the ionic strength of the bulk solution. The flux of osmotic water was linearly proportional to the difference of ionic strength between the feed and the strip solutions. The maximum values of the enrichment ratio obtained experimentally became smaller than those calculated from the relationship of Donnan equilibrium. The experimental changes of enrichment ratio with time, however, agreed well with the values calculated by using the measured values of physical properties of the membrane, self-diffusion coefficients, distribution coefficients of ions, liquid film resistances and the flux of osmotic water.
