Chelating ion exchangers with bonded 8-quinolinol on a glycidyl methacrylate gel

Abstract

The optimum conditions of chemical bonding of 8-quinolinol to a porous glycidyl methacrylate matrix were established with respect to the sorption capacities of the ion exchangers prepared. After its modification, the reagent was fixed either directly as 5-(4-hydroxyphenylazo)-8-quinolinol or 5-(4-aminophenylazo)8-quinolinol (or their copper(II) complexes), or indirectly, after fixing the intermediate and its diazotization, by coupling with the gel. The best results (Q_a(Cu²⁺) = 0.24 mmol g^-1) were achieved by the direct bonding of copper 5-(4-hydroxyphenylazo)-8-quinolinate in pyridine.