SYNTHESIS AND SORPTION PROPERTIES TOWARDS TOXIC METAL IONSOF COMPOSITES BASED ON SILICA GEL AND ADSORPED 4-VINYLPYRIDINE AND TERT-BUTYL METHACRYLATE COPOLYMERS: DOI: Https: doi.Org 10.17721 1728-2209.2023.1(58).3. Вісник: Хімія 2023, 58 (1), 18-21.