Authors
M Rasouli, N Yaghobi
Publication date
2014
Volume
8
Description
Pb2+ adsorption from aqueous solution were conducted by varying various parameters such as contact time, pH, adsorbent dosage, concentration of adsorbate and temperature. The adsorption kinetic of Pb2+ onto nano-adsorbent Na-X from FAU family was discussed using the pseudo-first order and pseudo-second order models, and the pseudo-second order model provided the best correlation of the experimental data. Langmuir and Freundlich adsorption isotherms were employed in order to evaluate the optimum adsorption capacity of the adsorbent. nano-adsorbent Na-X was found to be very effective and reached equilibrium in 100 min (adsorbate concentration 15 mg/L). The rate constant has been calculated at 298, 308 and 318K and the activation energy (Ea) was calculated using the Arrhenius equation.