Fe(OH)3/kaolinite nanoplatelets: Equilibrium and thermodynamic studies for the adsorption of Pb(II) ions from aqueous solution

Akl M. Awwad, Maisa'a W. Shammout and Mohammad W. Amer

Abstract

Development of a sustainable route for preparation Fe(OH)3/kaolinite nanoplatelets from Batin El-Ghoul clay deposits, south Jordan with uniform platelike morphology. Fe(OH)3/kaolinite nanoplatelets is an efficient adsorbent for the removal of Pb(II) ions from aqueous solutions. Effects of pH solution, adsorbent dose, initial metal ion concentration, contact time, and temperature on the adsorption process were examined. The Langmuir isotherm model is the best fit model to predict the experimental data and the adsorption capacity. Maximum adsorption capacity on Langmuir isotherm was 370.37 mg/g. Thermodynamic parameters revealed that the negative values of ΔGo and the positive value of ΔHo, the adsorption process was spontaneous and endothermic. Results revealed that Fe(OH)3/kaolinite is promising for the removal of metal ions from effluents.