Gamma Irradiation-Induced Preparation of Polyacrylonitrile Acrylamide Nano-Silica for Removal of Some Hazardous Metals

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Abstract Gamma-irradiation initiated polymerization was utilized to prepare polyacrylonitrile acrylamide nano-silica {P(AN-AM)-NS}. Various analytical tools like XRD, FT-IR, SEM, TEM and DTA & TGA were used to estimate the morphology, functional groups, and structure of {P(AN-AM)-NS} nanocomposite. The ability of {P(AN-AM)-NS} nanocomposite to remove Cs(I), Pb(II), Cd(II), Sr(II), and Cu(II) ions from the multi-component system was evaluated by batch techniques considering the influence of (shaking time, pH, reaction temperatures), and capacity. At the optimum pH, distribution coefficients have selectivity order; Pb2+ > Cs+ > Cu2+ > Cd2+ > Sr2+. The kinetic data obey pseudo-second-order models. The capacity was reduced by increasing the heating temperatures of solid powder. The thermodynamic parameters showed an endothermic and spontaneous. The investigation proved that {P(AN-AM)-NS} nanocomposite is a suitable organic-inorganic sorbent for the sorption of the studied ions from liquid solutions and could be considered as potential material for purification of effluent polluted with these ions.

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