This study focuses on the synthesis and characterization of a cationic ion-exchange sorbent derived from vermiculite and epoxy acrylate copolymers, designed to address freshwater scarcity by removing toxic metal ions from aqueous environments. The sorbent was engineered to preserve the chemical integrity of freshwater while adhering to environmental safety standards. Vermiculite served as the base material, modified with glycidyl methacrylate (GMA), acrylonitrile (ACN), and orthophosphoric acid (H₃PO₄) in a mass ratio of 1:0.35:0.15:3. Optimization experiments explored varying H₃PO₄ proportions (two- and threefold increases) to refine the synthesis conditions. The materials underwent microwave irradiation at 300 W for 10 min. Infrared (IR) spectroscopy confirmed the presence of functional groups (P=O, P−O−C), enhancing sorption capacity, while scanning electron microscopy (SEM) revealed a porous structure crucial for adsorption. Sorption properties, assessed via atomic emission spectroscopy, demonstrated capacities of 39.80 mg/g for MoO₄²⁻ and 39.06 mg/g for ReO₄⁻, with extraction efficiencies of 79% and 78%, respectively. Chemical stability tests indicated the sorbent retained up to 90% of its functionality in aggressive environments, highlighting its robustness. The developed sorbent offers a high-performance, cost-effective solution for heavy metal removal from wastewater, advancing sustainable water purification technologies.

This study describes the features of active game-based learning in primary schools. The survey involved 38 national sports coaches and 29 school teachers. Based on previous empirical findings, this study probes whether there is an established opinion about national games in the school curriculum among teachers and experts. Primary school students are offered many techniques to form necessary skills during the execution of physical exercises. The findings demonstrate that different games and competitions are able to expand the social circle of children. In the long run, the relationships between individual tribes and tribal unions became consistent and global. Games and competitions favoured this tendency, contributing to a gradual formation of behavioural norms in people of different generations.

The article studies the properties of obtaining anionite based on a triple copolymer of glycidylmethacrylate, styrene and Acrylonitrile and its suction of strontium ions. The composition and structure of the obtained anion was determined by infrared spectroscopy, were also studied basic physicochemical properties of the resulting anion. Anionite, presented on the basis of GMA-ST-ACN, is promising in the field of ion exchange process and is used for the extraction of strontium ions from aqueous solutions in the field of hydrometallurgy. The work is devoted to a review of the preparation of cross-linked polyelectrolytes, the extraction of strontium (II) ions using anionites. The possibilities of obtaining new nitrogen-containing anion exchangers based on a copolymer of glycidyl methacrylate (GMA), styrene (St) and acrylonitrile (ACN) have been studied. The optimal synthesis conditions were found and the physicochemical properties of the ion exchanger were investigated. Methods for the preparation of new anionites based on a copolymer of glycidyl methacrylate (GMA) with polyethylene polyimines (PEI) have been developed.

The purposeful synthesis of polymeric chelate-forming sorbents, distinguished by high efficiency, selectivity of action, cost-effectiveness, is one of the promising directions in the field of increasing selectivity of the sorption processes. The paper aims at the synthesis of new ionic compounds, based on the copolymers of glycidyl methacrylate and chelating agent - oxyethylidenediphosphonic acid. The preparation of the insoluble complex sorbents by the method of a chemical modification with the introduction of a soluble complexone, hydroxyethylidenediphosphonic acid, widely used in the industry and heat engineering, into the polymer matrix has been studied. The ways of obtaining new ion-exchange resins, based on a double copolymer of glycidyl methacrylate, methyl methacrylate and oxyethylenediphosphonic acid complexon, have been developed. The optimal mode for obtaining the ion exchangers, based on a double copolymer of glycidyl methacrylate, methyl methacrylate and oxyethylenediphosphonic acid, is the mass ratio of copolymer:acid 1.0:1.0, at a temperature of 90 0C, and heating during 10 hours. The yield of ion exchangers makes up 78-80%. The composition and structure of the obtained ionites have been identified by the infrared spectroscopy and elemental analysis. The static exchange capacity for 0.1 М NaOH solution is 5.92 mg-eq/g. It has been found that the obtained ionite has a satisfactory chemical resistance to various acids, alkalis and oxidants, the loss of the static exchange capacity does not exceed 7%. The resulting ionite can be used as a sorption material for the industrial wastewater treatment from various metal ions.

Relevance. The recovery of rubidium from aqueous media is relevant because of the growing demand for rare alkali metals and the need for efficient sorption materials capable of operating under mildly acidic conditions. Purpose. The study aimed to evaluate the sorption characteristics of polyfunctional anion exchangers based on 2-aminoethyl vinyl ether (vinyl ether of monoethanolamine, VEMEA), allyl glycidyl ether (AGE), and polyethyleneimine (PEI) toward Rb+ ions. Methods. The VEMEA–AGE– PEI anion exchanger was synthesized by polycondensation of pre-epoxidized VEMEA with AGE and PEI, followed by curing, fractionation, washing, and conversion to the OH− form. The material was characterized by FTIR spectroscopy and physicochemical parameters. Rubidium sorption was studied under static conditions using Rb2SO4 model solutions. The effects of initial concentration, contact time, and solution pH were evaluated, and the equilibrium data were analyzed using the Langmuir and Freundlich models. Residual rubidium was determined by atomic emission spectrometry. Results. The maximum experimental sorption capacity reached 11.34 mg/g. Equilibrium was attained within 1 h. The Langmuir model gave qmax = 8.78 mg/g and KL = 0.313 L/mg (R2 = 0.9993), while the Freundlich model gave Kf = 1.87 and n = 1.17 (R2 = 0.9981). Within the investigated pH range of 1.87–4.17, the highest sorption performance was observed at pH 4.17. FTIR spectral changes suggested the participation of amino and other donor groups in interactions with rubidium ions. Practical significance. The obtained results demonstrate the potential of VEMEA–AGE–PEI anion exchangers for rubidium extraction and concentration from weakly acidic aqueous media and for the development of functional ion-exchange materials.

Despite the importance of research competence in modern chemical education, traditional instructional methods often fail to sufficiently prepare students for independent scientific inquiry and professional growth, creating a gap between theoretical knowledge and practical application. The research aimed to experimentally validate a multifaceted system of pedagogical environments (research-focused, metacognitive-digital, and motivational) designed to foster research competence in chemistry students through practice-oriented learning. The research design of the research was a 30-week longitudinal pedagogical experiment utilizing a quasi-experimental design with pre- and post-test assessments. The sample comprised of 325 third- and fourth-year future chemistry teachers (experimental group (EG)=165; control group (CG)=160) from a national university in Kazakhstan. Statistical analysis (Pearson χ² test) confirmed significant growth in the EG across all competence criteria, with the proportion of students reaching “high-level” research proficiency increasing from 10.9% to 38.8%. The key implication is integrating structured pedagogical environments into teacher-training curricula effectively bridges the gap between theoretical knowledge and practical inquiry, providing a scalable framework for modernizing science, technology, engineering and mathematics (STEM) education.