Abstract
This work presents the optimization of process variables to maximize the percent of Fe (II) removal, R (%), by chelating resin
Purolite S930 from 34% CaCl2 solutions. To study the combined effect of the initial solution pH, initial Fe (II) concentration and
resin dosage was used a 23 orthogonal central composite design and Response Surface Methodology (RSM) for analysis of
experimental data. To optimize the regression equation was used The Gradient method. The study discovered that the optimum
values of these variables where: pH = 5.16, C = 24.60 mg Fe (II)/L and a = 1.02 g resin/L, respectively. In this point the percent
of iron (II) removal from 34% CaCl2 solution is the maximum one (96.2% mg Fe (II)/g given by empirical model and 95.32%
verified experimentally).