Fabrication of expanded vermiculite using the mixed methods of microwave and H2O2 agents for arsenic adsorption in water

Abstract

Among the technologies that have been studied to remove anions caused by Arsenic pollution, adsorption has received considerable attention. Vermiculite (VER) is a clay mineral that is abundant, low cost, environmentally friendly and is considered a potential adsorbent material for removing Arsenic from aqueous environments. In this work, expanded VER was studied for the adsorption of Arsenic(V) in water. The effects of concentration and time on adsorption efficiency were investigated in detail and fully. The maximum adsorption capacity of expanded VER for As(V) was 17.123 mg.g-1, and the saturation adsorption time was about 120 minutes. The kinetic model results showed that the adsorption processes followed second-order kinetics.