Heavy and toxic metal uptake by mesoporous hypercrosslinked SMA beads: Isotherms and kinetics

Hypercrosslinked styrene-maleic acid copolymer beads were used for the removal of metal ions from mimicked industrial effluents. the polymer was characterized by sem which revealed the presence of a porous network. carboxyl acid groups of the polymer were identified as active sites for metal uptake. highly porous surface enhanced metal ion uptake was achieved through a physicochemical process. equilibrium sorption of metal ions was best described by the freundlich and temkin model with r2 > 0.99. adsorption followed pseudo first and pseudo second order reaction kinetics. intraparticle diffusion model suggested a three step equilibrium. desorption was a fast process with ∼90% in 60 min. © 2013