As(V) removal from aqueous solutions by fly ash

摘要: Abstract The present work examines the possible use of fly ash, a by-product coal power stations, as means removing arsenic (V) from water, or equivalently, restricting its movement in solid wastes soil. Kinetic and equilibrium experiments were performed order to evaluate removal efficiency lignite-based ash. Both adsorption desorption done at three pH levels, namely 4, 7 10. results indicated that can be removed water by yet degree depended markedly on pH. Removal demonstrated isotherms, was significantly higher than other two values. For 80% arsenic, phase concentration 4 up times greater levels. During studies only small amount pre-adsorbed released into water. This practically independent initial ash loading. indicates is almost irreversible and, therefore, there are good prospects for fixation practical applications.