Sorption efficiency of three novel extractant-impregnated resins containing vesuvin towards Pb(II) ion: Effect of nitrate and amine functionalization of resin backbone

A macroporous polymeric resin, Amberlite XAD-1160, functionalized with NO2(electron-acceptor) and NH2(electron-donor) groups to prepare two new functional macroporous resins, NO2-XAD-1160 and NH2-XAD-1160 respectively, and three novel extractant-impregnated resins (EIRs) were prepared by impregnating XAD-1160, NO2-XAD-1160 and NH2-XAD-1160 with vesuvin, as an advantageous extractant. The sorption efficiencies of both VSVINO2-XAD-1160 and VSVINH2-XAD-1160 towards Pb(II) ion were compared with those of conventional VSV/XAD-1160 to gain insight about the effects of functional groups on the kinetics, equilibrium, thermodynamic and other sorption properties. Comparative studies showed that VSVINO2-XAD-1160 benefits for using in full-scale treatment processes are more than those of VSV/XAD-1160 and VSV/NH2-XAD-1160. (C) 2016 Elsevier B.V. All rights reserved.