ION REPLACEMENT GEL:ION REPLACEMENT KINETICS MODEL OF ACA
ACA ion replacement gel is a novel ion adsorbent and is hopeful to be used to cure human toxicosis metallicus. In this paper the ion replacement kinetics process of Alginate Chitosan Alginate(ACA) and the mutual replacement process of Calcium Alginate(A Ca) and Alginate Chitosan Alginate Calcium(ACA Ca) gel beads for Pb 2+ are studied by mobile boundary model. The model has high reliability. The ion replacement process is controlled by Particle Diffusion Control (PDC). The apparent diffusion coefficient is higher with increasing concentration of Pb 2+ and is linearly related to R -2 . The reaction order of ACA for Pb 2+ is 0 76.