Resumo

ARRIETA, Arélis et al. Ion Exchange Kinetics of Cadmium under liquid phase controlCinética de Intercambio Iónico del Cadmio bajo control de la fase liquida  . Rev. Téc. Ing. Univ. Zulia [online]. 2004, vol.27, n.3, pp.173-181. ISSN 0254-0770.

The main goal of this research work was: to develop a general kinetics model of ionic exchange that includes diffusion and ionic migration fluxes in a mass transfer process controlled by a liquid phase, and to validate it with a set of experimental data obtained with a batch reactor for the Cadmium-Hydrogen system on a polyestirene synthetic resin. The results show that the proposed model can predict the ion-exchange kinetics under operating variables that favors the liquid phase control such as: Cd⁺⁺ concentrations in liquid phase lower than 10 ppm, higher temperatures, pH in the acid range, co-ion from strong electrolyte and Dowex resin 50W-X8 of lower size. 

Palavras-chave : Ion exchange; Ionic migration; System Cd⁺⁺-H⁺.