Abstract
Synthesis of two unconventional ion exchange resins and their behaviour on the mercury sorption experiments were investigated. The ion exchange resins were obtained by the quaternization reaction of 4-vinylpyridine:divinylbenzene copolymer, gel-type, by two ways namely, the nucleophilic substitution of the pyridine matrix with 2-chloroacetamide and the nucleophilic addition of protonated copolymer to acrylamide. Comparative sorptions of Hg 2+ ions on the synthesized pyridine resins by batch experiments in mono- and binary system were analyzed. Mercury retention experiments aimed to study the influence of the solution concentration, contact time and solution pH. The removal of Hg 2+ ions from aqueous solutions depends on the pH values, the amount of the retained mercury increased with the pH value. The studied strong base pyridine anion exchange resins presented a good selectivity for the Hg 2+ ions during the competitive sorption of Hg 2+/Cu 2+, Hg 2+/Zn 2+ and Hg 2+/Fe 3+ at metal cations ratio of 1:1.
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