Magnetically controlled alginate-encapsulated aluminosilicates: highly effective sorbents for the target removal of heavy metals from wastewater
Artykuł w czasopiśmie
MNiSW
100
Lista 2024
| Status: | |
| Autorzy: | Galaburda Mariia, Goncharuk Olena, Guzenko Nataliia, Wasilewska Małgorzata, Szewczuk-Karpisz Katarzyna, Panek Rafał, Franus Wojciech |
| Dyscypliny: | |
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| Rok wydania: | 2026 |
| Wersja dokumentu: | Elektroniczna |
| Język: | angielski |
| Numer czasopisma: | 3 |
| Wolumen/Tom: | 33 |
| Strony: | 1020 - 1041 |
| Scopus® Cytowania: | 0 |
| Bazy: | Scopus |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| A series of alginate-encapsulated composites (AECs) based on zeolite (NaX) and montmorillonite (MMT) and their magnetite-functionalized derivatives (Alg/NaX/Fe3O4 and Alg/MMT/Fe3O4) were synthesized using a natural polysaccharide, sodium alginate, cross-linked with calcium ions. The composites were characterized by Fourier transform infrared spectroscopy, thermogravimetric analysis, X-ray diffraction, and scanning electron microscopy. The synthesized AECs showed good adsorption properties for metal ions. The maximum Cd(II) adsorption reached 0.74–0.76 mmol/g for NaX- and MMT-containing AECs and 0.69–0.70 mmol/g for magnetite-incorporated AECs. Fe(II) uptake showed a similar trend. The sorption capacity was 0.43–0.41 mmol/g for AECs without magnetite and 0.38 and 0.28 mmol/g for Alg/NaX/Fe3O4 and Alg/MMT/Fe3O4, respectively. The time dependence of ion sorption was investigated, and the sorption mechanism was analyzed. The experimental adsorption kinetics aligned with the pseudo-second-order model, indicating that chemisorption is the main mechanism for the interaction of the ions with the surface groups of the sorbents. The AECs achieved 96–99% removal of Cd(II) and 83–97% removal of Fe(II) ions, confirming their high efficiency in extracting metal ions. Thermal analysis showed that the composites exhibit high stability, with decomposition starting above 150 °C. This makes them suitable for use in hot aqueous solutions and enables efficient magnetic separation. |
