| Popis: |
In this study, different reagents have been examined to improve the adsorption ability of hematite for the removal of Cd (II) and Pb (II) ions from aqueous solution. The best adsorption result has been obtained using oxalate-loaded hematite.. The equilibrium isotherm stdies show the best result was attained in Langmuir model for Pb (II) and Cd (II) ions. Therefore, homogenous adsorption is dominated which was emphasized by three-parameter-isotherm models. The experimental data fits well with the pseudo-second-order kinetics. The Pb (II) adsorption was endothermic and spontaneous, but the Cd (II) adsorption was exothermic and unspontaneous. |
