Szczegóły publikacji
Opis bibliograficzny
Highly efficient uranium uptake by the eco-designed cocamidopropyl betaine-decorated Na-P1 coal fly-ash zeolite / M. SOBCZYK, A. Rossberg, A. Santhana Krishna Kumar, M. MARZEC, A. Cwanek, E. Łokas, C. NGUYEN DINH, T. BAJDA // Journal of Hazardous Materials ; ISSN 0304-3894. — 2024 — vol. 477 art. no. 135230, s. 1–14. — Bibliogr. s. 13–14, Abstr. — Publikacja dostępna online od: 2024-07-17
Autorzy (8)
- AGHSobczyk Maciej
- Rossberg André
- Kumar A. Santhana Krishna
- AGHMarzec Mateusz M.
- Cwanek Anna
- Łokas Edyta
- AGHNguyen Dinh Chau
- AGHBajda Tomasz
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 154682 |
|---|---|
| Data dodania do BaDAP | 2024-07-31 |
| Tekst źródłowy | URL |
| DOI | 10.1016/j.jhazmat.2024.135230 |
| Rok publikacji | 2024 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | Journal of Hazardous Materials |
Abstract
In some locations around the globe, the U concentrations may exceed WHO standards by 2-folds therefore, effective yet environmentally wise solutions to purify radioactive waters are of significant importance. Here, the optimized and fully controlled coal-fly-ash based Na-P1 zeolite functionalization by employing novel, biodegradable biosurfactant molecule - cocamidopropyl betaine (CAPB) is showcased. The zeolite's surface decoration renders three composites with varying amounts of introduced CAPB molecule (Na-P1 @ CAPB), with 0.44, 0.88, and 1.59-times External Cation Exchange Capacity (ECEC). Wet-chemistry experiments revealed extremely high U adsorption capacity (qmax = 137.1 mg U/g) unveiling preferential interactions of uranyl dimers with CAPB molecules coupled with ion-exchange between Na+ ions. Multimodal spectroscopic analyses, including Fourier-Transformed Infra-Red (FT-IR), X-ray Photoelectron (XPS), and X-ray Absorption Fine Structure (XAFS), showed the hexavalent oxidation state of U, and no secondary release of the CAPB molecule from the composite. The EXAFS signals fingerprint changes in the interatomic distances of adsorbed U, showing the impact of the O and N, heteroatoms present in the CAPB molecule on U binding mechanism. The presented research outcomes showcase the easy, scalable, optimized, and environmentally friendly synthesis of biofunctional zeolite effectively purifying the real-life U-bearing wastewaters from the vicinity of the Pribram deposit (Czech Republic).
