Kinetics of Iron (II) Removal from Aqueous Solution Using Activated Dolomite

Abstract

Experimental investigations were undertaken in batch kinetic systems, for the removal of iron (II) from aqueous solutions using activated dolomite. The effect of the extent dolomite activation on the dissolution of magnesium and calcium from the dolomite lattice was determined. Under optimum experimental conditions there was a direct linear relationship between magnesium dissolution and iron (II) removal from bulk solution. The experimental data were mathematically described using empirical external mass transfer and pseudo-intra-particle diffusion models. The data show conformity with a three stage process, with the iron (II) removal rate showing good correlation with external mass transfer (t < 1 min) and two rates of pseudo-intra-particle diffusion (1 < t < 90mins, and t < 90mins).