Chalcogenide Aerogels as Sorbents for Radioactive Iodine
| Autor: | David A. Pierce, Kyriaki Polychronopoulou, Brian J. Riley, Debajit Sarma, Kota S. Subrahmanyam, Mercouri G. Kanatzidis, Jaehun Chun, Christos D. Malliakas |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
chemistry.chemical_classification
Radionuclide Chemistry General Chemical Engineering Iodide Inorganic chemistry Radiochemistry chemistry.chemical_element Context (language use) General Chemistry Iodine Chemical reaction Metal Matrix (chemical analysis) Nuclear reprocessing visual_art Materials Chemistry visual_art.visual_art_medium |
| Zdroj: | Chemistry of Materials. 27:2619-2626 |
| ISSN: | 1520-5002 0897-4756 |
| DOI: | 10.1021/acs.chemmater.5b00413 |
| Popis: | Iodine (129I and 131I) is one of the radionuclides released in nuclear fuel reprocessing and poses a risk to public safety due to its involvement in human metabolic processes. In order to prevent the release of hazardous radioactive iodine into the environment, its effective capture and sequestration is pivotal. In the context of finding a suitable matrix for capturing radioactive iodine, several sulfidic chalcogels were explored as iodine sorbents including NiMoS4, CoMoS4, Sb4Sn3S12, Zn2Sn2S6, and K0.16CoSx (x = 4–5). All of the chalcogels showed high uptake, reaching up to 225 mass % (2.25 g/g) of the final mass owing to strong chemical and physical iodine–sulfide interactions. Analysis of the iodine-loaded specimens revealed that the iodine chemically reacted with Sb4Sn3S12, Zn2Sn2S6, and K0.16CoSx to form the metal complexes SbI3, SnI4, and, KI, respectively. The NiMoS4 and CoMoS4 chalcogels did not appear to undergo a chemical reaction with iodine since iodide complexes were not observed with these s... |
| Databáze: | OpenAIRE |
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