Selective study of elimination of Cd (II) and Pb (II) from aqueous solution by novel hybrid material

ABSTRACTThis work is focused on the selectivity of the elimination of cadmium (II) and lead (II) by novel hybrid material which has been synthesized and characterized previously (Zn/Al-DDPA). This study has obliged us to highlight the effect of equilibrium time, effect of concentration of pollutants, effect of the amount of the adsorbent and the effect of adding salts. Thermodynamic study confirms that the adsorption process is exothermic and spontaneous process with a disorder between the two phases and that the adsorbent is reusable after three steps of desorption. The best extraction yield for this study is more than 70% for cadmium (II).