Efficient Removal of Cs+ and Sr2+ Ions by Granulous (Me2NH2)4/3(Me3NH)2/3Sn3S7·1.25H2O/Polyacrylonitrile Composite
| Autor: | Jian-Ce Jin, Xiao-Ying Huang, Ji-Long Li, Hai-Yan Sun, Xi Zeng, Mercouri G. Kanatzidis, Yan-Min Zou, Mei-Ling Feng |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Strontium Sorbent Materials science Sulfide Inorganic chemistry Composite number Polyacrylonitrile chemistry.chemical_element 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Metal chemistry.chemical_compound Adsorption chemistry visual_art Caesium visual_art.visual_art_medium General Materials Science 0210 nano-technology |
| Zdroj: | ACS Applied Materials & Interfaces. 13:13434-13442 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.1c01983 |
| Popis: | The need to effectively and selectively remove radioactive 137Cs and 90Sr from nuclear waste solutions persists to mitigate their environmental mobility and high radiotoxicity. Because it is difficult to effectively remove them from acidic environments that degrade most sorbents, new sorbent materials are highly desirable. Here, efficient removal of Cs+ and Sr2+ is achieved by the composite of layered tin sulfide (Me2NH2)4/3(Me3NH)2/3Sn3S7·1.25H2O (FJSM-SnS) and polyacrylonitrile (PAN) (FJSM-SnS/PAN). The granulous composite possesses regular particle morphology and good mechanical strength as an engineered form. It shows excellent acid-base and γ-irradiation resistance, high maximum adsorption capacities (qm) of 296.12 and 62.88 mg/g for Cs+ and Sr2+ ions, respectively, and high selectivity even in the presence of excess Na+ ions or using lake water. Impressively, qmCs of FJSM-SnS/PAN reaches 89.29 mg/g under even acidic conditions (pH = 2.5). The column loaded with FJSM-SnS/PAN granules exhibits high removal rates (R) toward low-concentration Cs+ and Sr2+ ions under both neutral and acidic conditions. Moreover, the composite can be recycled and reused with high RCs and RSr. This work highlights the great potential of metal sulfide ion-exchangers in engineered form for the efficient removal of Cs+ or Sr2+ ions, especially under acidic conditions, for radionuclide remediation. |
| Databáze: | OpenAIRE |
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