Development of cerium dioxide coated alumina adsorbent to study the removal of arsenic from ground water

摘要: Arsenic contamination of groundwater is a major problem in both developing and developed countries as it quite dangerous at extremely low concentrations prevalent many water supplies. Although there are removal techniques for arsenic, the most promising appears to be adsorption, since relatively cost, easy implement, requires no electricity, can remove trace amounts materials from solutions. Current adsorbents that have high affinity but costly because they slow adsorption rates, capacities, limited pH ranges, affected adversely by competing ions, often cannot regenerated. One successful adsorbent arsenic cerium dioxide, unfortunately, this compound expensive its rare earth component, cerium. Previous studies utilized pure dioxide adsorption. However, possible some may not accessible portion valuable chemical resides inside particle itself. This study examines efficacy new synthesized such nanoparticles coated over an alumina substrate attempt reduce cost improve efficiency. It found has fast rates (95% removed 5 minutes), effective large range, also preferentially adsorbs even when other chemicals commonly groundwater, phosphates, present. These results comparable those carbon nanotubes used previous studies. capacity much lower than nanoparticles. suggest effect environmental conditions on studied more effectively using model system.