Original Articles
Reem Al-Bayati
Abstract
In this study, a new type of composites namely attapulgite-melamine formaldehyde (AMF 5%) was prepared using poly-condensation polymerization of melamine with the formaldehyde in the presence of attapulgite as essential supported material. The prepared composite was used to remove both, Cr+6 and Mn+2 ions using adsorption process at variable conditions of pH, contact time, ion concentration and temperature. The adsorption characteristics of the new formed composite toward the two metal ions in dilute aqueous solutions were followed spectrophoto-matrically. The sorbed amount of the two metal ions under study appeared to closely follow Freundlich isotherm, with sorption process showing exothermic behavior. The kinetic of the sorption was analyzed using the pseudo- first order and pseudo- second order kinetic models. These studies indicate that attapulgite clay is a valuable support for the simple adsorption of (AMF 5%).