Synthesis, Characterization of P(CH/AA-co-AM) and Adsorptive Removal of Pb (II) ions from Aqueous Solution: Thermodynamic Study

Abstract

Cross-linking Chitosan/Poly (Acryl amide-Acrylic acid) Hydrogel (P(CH/AA-co-AM)) synthesized via free radical polymerization of Acrylamide and acrylic acid as monomers after that addition chitosan, using MBA and KPS as initiator. The produced materials' structural, surface, and thermal properties were determined using the following techniques: FT-IR, TGA, TEM, and FE-SEM. This study is concerned with a significant application of surface chemistry in the fields of removing heavy metals. It deals with the adsorption-systems of Pb (II) on Cross-linking Chitosan / Poly (Acrylic acid-Acryl amide) Hydrogel at variable conditions of concentration and temp. The measured data are following the Freundlich equation and, according to the Giles classification, the adsorption isotherms are of type S3. As a temperature feature (10, 20, 25 and 30oC), adsorption was investigated. With increasing temperature (endothermic process), the extent of adsorption of Pb (II)on P(CH / AA-co-AM) was found for increase. They have also measured the essential thermodynamic functions.