Separation and Purification Technology
The transport of zinc from sulphate solutions using pseudo-emulsion based hollow fibre strip dispersion technique was investigated. The reagent Ionquest 801 was used as an extractant in most experiments. The influence of several parameters like the flow rates, the initial concentration of Zn(II), the extractant amount, the pH, the volume ratio of feed to strippant, and the presence of Ca(II) in the feed phase was studied. A few tests with the extractants Cyanex 272 and DEHPA were also carried out for comparison. Equilibrium data of zinc and calcium extraction were obtained. The analysis of zinc transport was made on the basis of the overall mass transfer coefficient of permeation. This coefficient was also estimated by applying the resistance in series approach, the contribution of each resistance to the overall resistance to mass transfer being evaluated. © 2014 Elsevier B.V. All rights reserved.
Year of publication: 2014