Fly ash converting into ordered mesoporous silica materials for water purification from azo dyes
Artykuł w czasopiśmie
MNiSW
100
Lista 2024
| Status: | |
| Autorzy: | Jankowska Agata, Panek Rafał, Franus Wojciech, Gościańska Joanna |
| Dyscypliny: | |
| Aby zobaczyć szczegóły należy się zalogować. | |
| Rok wydania: | 2025 |
| Wersja dokumentu: | Elektroniczna |
| Język: | angielski |
| Wolumen/Tom: | 395 |
| Numer artykułu: | 113683 |
| Strony: | 1 - 17 |
| Impact Factor: | 4,7 |
| Web of Science® Times Cited: | 1 |
| Scopus® Cytowania: | 3 |
| Bazy: | Web of Science | Scopus |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| Extensively used azo dyes enter water bodies, posing a serious threat to the environment. Their removal is of great importance, hence, methods based on low-cost adsorbents derived from waste materials are currently being developed. In this study, fly ash-based silica materials (MCM-41 and SBA-15) were subjected to modifications with 3-aminopropyltrimethoxysilane (APTMS) and 3-aminopropyltriethoxysilane (APTES) to obtain novel and cheap adsorbents for the elimination of sunset yellow FCF and tartrazine from water. The functionalization significantly altered the samples’ porosity, structure ordering, and acid-base properties. The introduction of amine groups into the samples was confirmed by the increase in nitrogen content and the presence of new bands on FT-IR spectra. The influence of pH (2–9), temperature (RT, 35 °C, 45 °C), contact time (0–240 min), and initial azo dyes concentration (12.5–900 mg L−1) on sorption capacities of the obtained adsorbents was evaluated. The pH value of 2 was the most favorable for dye adsorption as a consequence of electrostatic interactions between their SO3− groups and NH3+ groups of adsorbents. APTMS-modified MCM-41 exhibited the highest sorption capacities toward sunset yellow FCF (531 mg g−1) and tartrazine (360 mg g−1). The adsorption kinetics followed the pseudo-second-order kinetic model, and the experiments on the regeneration of silica materials showed that modified adsorbents have potential for multiple reuses, thereby reducing the generation of waste. |
