NEW ANION EXCHANGERS AND THEIR SORPTION PROPERTIES TOWARD CHROMIUM (VI) AND VANADIUM (V) IONS

Abstract

Introduction. This study focuses on the synthesis of a novel anion-exchange material based on glycidyl methacrylate (GMA), methyl methacrylate (MMA), and acrylonitrile (AN), as well as on its ability to sorb heavy metal ions. The dependence of ion-exchanger properties on solution concentration, pH value, and contact time was investigated. The purpose of the work: To determine the structure, chemical stability, and optimal conditions for the efficient sorption of chromium (VI) and vanadium (V) ions by the new anion exchanger. Results and discussions: The optimal synthesis conditions were found to be 24 hours, a molar ratio of 1:6, and a temperature of 80 °C. The maximum sorption capacity was 509.2 mg/g for vanadium ions at pH 2.8 and 561.6 mg/g for chromium ions at pH 4.5. Kinetic studies showed that equilibrium was reached within 1 hour for vanadium and 2 hours for chromium. Conclusion: The new anion exchanger can be effectively applied in non-ferrous and ferrous metallurgy, as well as for the treatment of industrial wastewater from heavy metal ions.