Insights into Sorption–Mineralization Mechanism for Sustainable Granular Composite of MgO-CaO-Al<sub>2</sub>O<sub>3</sub>-SiO<sub>2</sub>-CO<sub>2</sub> Based on Nanosized Adsorption Centers and Its Effect on Aqueous Cu(II) Removal
Alla G. Morozova,
Tatiana M. Lonzinger,
Vadim A. Skotnikov,
Gennady G. Mikhailov,
Yury Kapelyushin,
Mayeen Uddin Khandaker,
Amal Alqahtani,
D. A. Bradley,
M. I. Sayyed,
Daria I. Tishkevich,
Denis A. Vinnik,
Alex V. Trukhanov
Affiliations
Alla G. Morozova
Laboratory of Single Crystal Growth, South Ural State University, 454080 Chelyabinsk, Russia
Tatiana M. Lonzinger
Laboratory of Single Crystal Growth, South Ural State University, 454080 Chelyabinsk, Russia
Vadim A. Skotnikov
Laboratory of Single Crystal Growth, South Ural State University, 454080 Chelyabinsk, Russia
Gennady G. Mikhailov
Laboratory of Single Crystal Growth, South Ural State University, 454080 Chelyabinsk, Russia
Yury Kapelyushin
Laboratory of Single Crystal Growth, South Ural State University, 454080 Chelyabinsk, Russia
Mayeen Uddin Khandaker
Centre for Applied Physics and Radiation Technologies, School of Engineering and Technology, Sunway University, Petaling Jaya 47500, Selangor, Malaysia
Amal Alqahtani
Department of Basic Sciences, Deanship of Preparatory Year and Supporting Studies, Imam Abdulrahman Bin Faisal University, Dammam 34212, Saudi Arabia
D. A. Bradley
Centre for Applied Physics and Radiation Technologies, School of Engineering and Technology, Sunway University, Petaling Jaya 47500, Selangor, Malaysia
M. I. Sayyed
Department of Physics, Faculty of Science, Isra University, Amman 11622, Jordan
Daria I. Tishkevich
Laboratory of Single Crystal Growth, South Ural State University, 454080 Chelyabinsk, Russia
Denis A. Vinnik
Laboratory of Single Crystal Growth, South Ural State University, 454080 Chelyabinsk, Russia
Alex V. Trukhanov
Laboratory of Single Crystal Growth, South Ural State University, 454080 Chelyabinsk, Russia
Although copper is needed for living organisms at low concentrations, it is one of the pollutants that should be monitored along with other heavy metals. A novel and sustainable composite mineralizing sorbent based on MgO-CaO-Al2O3-SiO2-CO2 with nanosized adsorption centers was synthesized using natural calcium–magnesium carbonates and clay aluminosilicates for copper sorption. An organometallic modifier was added as a temporary binder and a source of inovalent ions participating in the reactions of defect formation and activated sintering. The sorbent-mineralizer samples of specified composition and properties showed irreversible sorption of Cu2+ ions by the ion exchange reactions Ca2+ ↔ Cu2+ and Mg2+ ↔ Cu2+. The topochemical reactions of the ion exchange 2OH− → CO32−, 2OH− → SO42− and CO32− → SO42− occurred at the surface with formation of the mixed calcium–copper carbonates and sulfates structurally connected with aluminosilicate matrix. The reverse migration of ions to the environment is blocked by the subsequent mineralization of the newly formed interconnected aluminosilicate and carbonate structures.
