AP19175733 — Development of a universal polymer clay composite with high antiseptic characteristics based on modified bentonite clays of Kazakhstan and polymers for water purification

Purpose: Development of a universal polymer clay composite with high antiseptic and performance characteristics based on thermo- and acid-activated and decationated bentonite clays of Kazakhstan with silver nanoparticles in bulk, combined with nonionic polymers PAA and PGE, as well as MCCS for the purification of drinking and wastewater from biological, organic pollutants and heavy metals.

Relevance: Purification of drinking water and wastewater from biological and organic pollutants, as well as heavy metals, is an important task in conditions of increasing anthropogenic impact on the environment. The development of new polymer-clay composites based on bentonites of Kazakhstan with silver nanoparticles and nonionic polymers makes it possible to create effective and versatile sorption materials. Their use contributes to improving the quality of water treatment, which is especially important for industry, agriculture and environmental programs.

Scientific supervisor: Doctor of Ph.D., Beisebekov Madiyar

Results obtained: In this work, the physicochemical properties of bentonites from the Kalzhat and Orta Tentek deposits were studied, and their thermal and acid activation processes were carried out. Processing conditions were optimized to achieve controlled changes in pore structure and surface characteristics. The composition and structure of the samples were investigated using XRD, FTIR spectroscopy, TGA/DSC, and SEM, which enabled the identification of phase composition and morphology. In addition, decationized bentonites modified with silver nanoparticles were obtained, showing improved sorption properties. In the next stage, polymer–clay composites, hydrogels, and cryogels based on the modified materials were developed and analyzed. Their structural, sorption, and performance characteristics were evaluated, and optimal synthesis conditions and filler loading parameters were established.

List of publications with links to them

1. Beisebekov M., Kabdrakhmanova S., Kantay N., Nauryzova S., Shaimardan E., Akatan K., Kukhareva A., Bolatkhan D., Baibotayeva A., Kholiya F. Hydro-Activation and Physicochemical Characterization of Sodium Bentonite from the Orta Tentek Deposit, Kazakhstan // ES Materials and Manufacturing. – 2025. – DOI: https://dx.doi.org/10.30919/mm1954
2. Karzhaubayeva A., Beisebekov M., Kabdrakhmanova S., Shaimardan E., Nauryzova S. Thermally modified bentonite clay as a water-retaining material for soils // Bulletin of the Korkyt Ata Kyzylorda University. Agricultural Sciences. – Vol. 4 (No. 75). – 2025. – На рецензировании.
3. Karzhaubayeva A., Beisebekov M., Kabdrakhmanova S., Shaimardan E. Synthesis and sorption properties of hydrogel sorbents based on polymer-clay composites // ICN-2025. – Available at: https://www.macromol.in/ICN-2025/
4. Karzhaubayeva A., Beisebekov M., Aryp K., Bolatkan D., Shaimardan E. Cryogels with mineral fillers as promising sorbents for water purification // ICPCNB-2025. – Available at: https://icpcnb2025.satbayev.university/page/abstract-and-registration/book-of-abstracts