Effect of Zinc Oxide Montmorillonite Composite the Removal of Arsenite

Here, the study was aimed at providing evidence that the presence of synthetic zinc oxide-montmorillonite composite, enhanced the adsorption of arsenite by ACOR montmorillonite. The batch mode systems were used to test the adsorption of arsenite on zinc oxide-ACOR montmorillonite composite. The experimental data involved the synthesis of zinc oxide-ACOR montmorillonite composite. The presence of zinc oxide coating on ACOR montmorillonite enhanced the adsorption of arsenite in aqueous solution. This was because the zinc oxide coating enhanced reorganization of active sites. The mechanism of the reaction indicated less than one proton coefficient of 0.51, < 1. The intraparticle diffusion with a slope of 13.90 (mgg-1) min0.5 and intercept 250.33, ≠ 0 was controlled by the boundary layer. The mass transfer rates were 1.654^-4 cm-2 hr-1, 5.593^-5 cm-2 hr-1 and 3.345^-5 cm-2 hr-1. There was an enhancement of mass transfer of adsorbate to the external layer of the adsorbent.

Keywords: Activation; Adsorption; Clays; Colloids; Synthetic Methods; Kinetics.