Removal of Cu2+and Pb2+ions byN-vinyl 2-pyrrolidone/itaconic acid hydrogels from aqueous solutions (original) (raw)
2013, The Canadian Journal of Chemical Engineering
In this study, a series of crosslinked N-vinyl-2-pyrrolidone-itaconic acid (NVP-IA) hydrogels was prepared by free radical polymerisation in aqueous solution. Swelling, mechanical and adsorption properties for the removal of Cu 2+ and Pb 2+ ions from aqueous solutions of these hydrogels were investigated. Metal ion adsorption capacities of hydrogels for Cu 2+ and Pb 2+ ions were determined as 2.1 and 0.6 mmol g −1 , respectively. Adsorption processes of metal ions onto the NVP-IA hydrogels follow pseudo-second-order type adsorption kinetics. The equilibrium adsorption data have been evaluated using Freundlich and Langmuir isotherm models. The results illustrated that the adsorption follows Freundlich isotherm.
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