Polymeric composite materials based on silicate: II. sorption and distribution studies of some hazardous metals on irradiated doped polyacrylamide acrylic acid

Abstract

Magneso-silicate (MgSi) and polyacrylamide acrylic acid (Pam-Aa-MgSi) impregnated with magneso-silicate, as hybrid ion-exchange materials have chemical stability comparing with other composites ion-exchange materials. The capacities of MgSi, (Pam-Aa) and (Pam-Aa-MgSi) composites prepared at different radiation doses to Ni2+, Cd2+, Co2+, Pb2+, Zn2+ and Cu2+ ions were studied and the data indicated that their values of (Pam-Aa) and (Pam-Aa-MgSi) composites are lower than the values obtained for MgSi by 0.6 and 0.93 values, respectively. Distribution coefficients in nitric acid medium have been evaluated to explore the separation potentiality of MgSi, (Pam-Aa) and (Pam-Aa-MgSi) composites for mentioned cations. The data indicated that Cd2+ ion has high separation factor by 2.57, 2.13, 1.95, 1.93 and 1.42 for Pb2+, Zn2+, Co2+, Cu2+ and Ni2+ ions, respectively, on MgSi and the selectivity for the investigated ions had the sequence: Cd2+ > Ni2+ > Cu2+ ≈ Co2+ ≥ Zn2+ ≥ Pb2+ on MgSi.