Evaluation of anionic- and cationic-supported hydrogel membranes for sorption of Th(IV) and U(VI) ions from nitric acid medium

• Published in: Journal of applied polymer science 2006-10, Vol.102 (1), p.320-332
• Main Authors: Hegazy, E. A., El-Gammal, B., Khalil, F. H., Mabrouk, T. M.
• Format: Article
• Language: English
• Subjects: acrylamide-4-vinyl pyridine; acrylamide-acrylic acid; Applied sciences; characterization; Exact sciences and technology; LDPE; membranes; Organic polymers; Physicochemistry of polymers; preparation; Properties and characterization; Solution and gel properties; sorption; U(VI) and Th(IV)
• ISSN: 0021-8995; 1097-4628
• DOI: 10.1002/app.23816

Functionalized membranes were obtained by radiation‐induced graft copolymerization (RIGP) of acrylamide‐acrylic acid (AAm‐AAc) and acrylamide‐4‐vinyl pyridine (AAm‐4VP) binary monomers on both low‐density polyethylene and polypropylene films. The supporting conditions as inhibitor concentration, irradiation dose comonomer compositions and concentrations were studied and optimized. The prepared membranes were characterized using SEM, DTA‐TG, and FTIR. They proved that supporting the selected hydrogels on the base films have modified their structure and enhanced their thermal and mechanical characteristics. The sorption characteristics of Th(IV) and U(VI) on the different membranes were studied. The amount of ions sorbed at equilibrium was found to increase with increase in the degree of graft at certain conditions. The kinetics of sorption was also studied and found to obey the Lagergren and Morris–Weber kinetic models. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 320–332, 2006