A chemically functionalized hydroxyacetamide anchored polymeric adsorbent for the selective separation of zirconium from acidic aqueous solutions

摘要

In the present study, a chelating hydroxyacetamide anchored resin (PS-HOAc), prepared by the chemical modification of a commercially available chloromethylated polystyrene-divinylbenzene (PS-DVB) resin, was developed for the removal of Zr(IV) from acidic aqueous solutions. FT-IR, thermogravimetry, and SEM-EDX studies revealed the chemical linking of hydroxyacetamide group on the polystyrene network. The synthesized PS-HOAc resin has manifested to be highly selective for the adsorption of Zr(IV) as compared to Nd(III) and U(VI) in 0.1 M to 4 M nitric acid feed solutions. The adsorption behavior of Pu(IV) was comparable with Zr(IV). The apparent adsorption capacity for the adsorption of Zr(IV) derived by the Langmuir adsorption isotherm model was 92.6 mg.g(-1), which is comparable with the equilibrium adsorption capacity derived from the Pseudo first-order (Lagergren) model (93.6 mg.g(-1)). Selective separation of Zr(IV) in the presence of U(VI) and Nd(III) was also established by column studies experiments.