Abstract
Fly ash, a solid waste of thermal power plants has been converted into an effective adsorbent. This was achieved by impregnation with Al(NO 3 ) 3 or FeCl 3 . The kinetics of Ni(II) adsorption on these materials were studied in details. A pseudo-second-order model was proposed and the validity of the model was tested for various experimental conditions to study the effect of initial Ni(II) concentration and temperature. The pseudo-second-order rate constants and the amount of Ni(II) sorbed at equilibrium have been determined using pseudo-second-order model and correlated with the experimental values. Equilibrium modeling has been carried out using Langmuir isotherm equations and the corresponding constants have been evaluated.
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