Removal of Cd(II) ions from aqueous solutions, by adsorption onto Junipers Procera Roots

Abstract

This study explored the adsorption behavior of Cd(II) ions on Junipers Procera Roots powder from aqueous solutions. The effect of various operational parameters such as pH, contact time, initial adsorbate concentration, dosage of adsorbent and temperature on adsorption of Cd(II) ions were investigated using batch adsorption experiments. The optimum pH for Cd(II) adsorption was found to be 7.0. The suitability of Langmuir and Freundlich adsorption models to the equilibrium data was investigated. The adsorption was well described by the Freundlich isotherm model indicating the presence of heterogeneous sites for Cd(II) adsorption. Thermodynamic parameters showed that the adsorption of Cd(II) on Junipers Procera Roots was feasible, spontaneous and exothermic.