This study investigates arsenite removal onto binary mixed mineral sorbents from simulated wastewater, relevant to streams and groundwater impacted area. Mixed mineral suspensions of kaolinite/montmorillonite, goethite.kaolinite and goethite/montmorillonite exhibited different sorption behavior from the single mineral components, with goethite/montmorillonite demonstrating a stepwise decrease in arsenic sorption as pH increases Changes in arsenic(III) sorption as particle concentration (Cp) increased was linear for goethite and mixed mineral systems containing goethite Kaolinite/goethite demonstrated a step down arsenite sorption for the first 288 hours, increasing arsenite sorption for the remaing residence time of the reaction. The complex behavior of mineral systems over the range of residence time investigated may be attributed to increased hydroxylation of the mineral surface resulting in the formation of new reactive sites.
