pH-Effect on Heavy-Metal Adsorption and Desorption of Sodium acrylate/Acrylamide and p-Styrenesulfonicacidsodiumsalt/Acrylamide Gels

Abstract

pH-dependences of Ni(II)-adsorbing and -desorbing properties of p-styrenesulfonicacidsodiumsalt/acrylamide (p-SSAS/AAm) and sodium acrylate/acrylamide (SA/AAm) gels have been investigated. Though the p-SSAS/AAm gel can capture more amount of Ni(II) even at a low pH region, its desorption ratio is below ～92 wt% even in 3 M of HCℓ concentration. On the other hand, though Ni(II)-capturing efficiencies of the SA/AAm gel is lower; its Ni(II)-desorption ratio is ～100 wt% in all the measured HCℓ concentrations.