Adsorption of arsenate ion by Fe, Pb and Ag-exchanged forms of clinoptilolite

Abstract

Experiments were set up to estimate the effectiveness of clinoptilolite for the removal of arsenate from aqueous solutions. The removal of arsenate by the exchanged forms was analyzed in the light of the Langmuir model of adsorption. A kinetic study of adsorption was carried out at different intervals of time, and the K-ad values were calculated by using Lagergren's equation. Adsorption of arsenate proceeds through the formation of arsenate precipitates.