| Autor: |
Oksana Livitska, Nataliia Strutynska, Kateryna Loza, Oleg Prymak, Yuriy Prylutskyy, Olha Livitska, Matthias Epple, Nikolai Slobodyanik |
| Jazyk: |
angličtina |
| Rok vydání: |
2018 |
| Předmět: |
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| Zdroj: |
Chemistry Central Journal, Vol 12, Iss 1, Pp 1-8 (2018) |
| Druh dokumentu: |
article |
| ISSN: |
1752-153X |
| DOI: |
10.1186/s13065-018-0455-9 |
| Popis: |
Abstract The particularities of cesium incorporation into synthetic calcium phosphates with either apatite or whitlockite-type structures were investigated using the sorption process from aqueous solution and further heating to 700 °C. The nanoparticles for sorption were prepared by wet precipitation from aqueous solutions at a fixed molar ratio of Ca/P = 1.67 and two different ratios of CO3 2−/PO4 3− (0 or 1). The obtained substituted calcium phosphates and corresponding samples after the sorption of cesium from solutions with different molar concentrations (c(Cs+) = 0.05, 0.1 and 0.25 mol L−1) were characterized by powder X-ray diffraction, FTIR spectroscopy, scanning electron microscopy and elemental analysis. Based on the combination of X-ray diffraction and elemental analyses data for the powders after sorption, the cesium incorporated in the apatite- or whitlockite-type structures and its amount increased with its concentration in the initial solution. For sodium-containing calcium phosphate even minor content of Cs+ in its composition significantly changed the general principle of its transformation under annealing at 700 °C with the formation of a mixture of α-Ca3(PO4)2 and cesium-containing apatite-related phase. The obtained results indicate the perspective of using of complex substituted calcium phosphates nanoparticles for immobilization of cesium in the stable whitlockite- or apatite-type crystal materials. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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