Abstract
The terpolymeric resins were prepared by base catalyzed polycondensation of p‐hydroxybenzaldehyde, resorcinol and formaldehyde. Resin obtained by molar monomer composition, p‐hydroxybenzaldehyde: resorcinol: formaldehyde as 1:1:3 was abbreviated as PHBRF‐I and that prepared by 1:2:4 composition was abbreviated as PHBRF‐II. These resins were characterized by physicochemical methods such as elemental analysis, UV‐Vis, IR and NMR. ion‐exchange study was carried out with Cu2+, Zn2+, Ni2+, Co2+, Pb2+ & Cd2+ by batch equilibrium method. The rate of metal ion uptake by PHBRF‐II terpolymeric resin was higher than that of PHBRF‐I. Effect of pH and electrolytes under specified condition were also studied. The terpolymeric resins show high selectivity for Cu2+, Zn2+ and Co2+ as compared to Ni2+, Pb2+, and Cd2+.
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