Physicochemical and Sorption Properties of Anionites Based on Aromatic Amines, Epichlorohydrin and Polyethylenimine with Regard to Strontium (II) Ions

Multifunctional anion exchangers based on aromatic amines, epichlorohydrin and polyethylenimine have been synthesized. Their composition, structure, and thermal stability have been studied using IR spectroscopy, elemental and thermogravimetric analyses. Extraction of strontium ions has been studied using classical polarography, and sorption of strontium (II) ions in static regime has been determined as a function of solution acidity, metal ion concentration, and contact duration of ionites with SrCl2 solution. It has been established that the obtained ion exchangers are characterized by high sorption properties with regard to strontium ions. The novelty of these studies is that the sorption dependence of synthesized ionites with regard to Sr ions has been studied for the first time. The practical importance of this work is the development of anion exchangers with higher extractability, which could successfully solve the issues of elimination of strontium (II) ions from process wastes of nonferrous metallurgy.