Extraction chromatographic separation of thorium by silica gel impregnated with cyanex 923
| Autor: | Abdou A. Abdou, Hany Lotfy Weheish, Wagiha H. Mahmoud, Sherien H. Ahmed, Ahmed Hussien Orabi |
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| Rok vydání: | 2021 |
| Předmět: |
Materials science
Aqueous solution Elution Silica gel Health Toxicology and Mutagenesis Extraction (chemistry) Public Health Environmental and Occupational Health Thorium chemistry.chemical_element 010403 inorganic & nuclear chemistry 01 natural sciences Pollution Toluene 0104 chemical sciences Analytical Chemistry chemistry.chemical_compound Adsorption Nuclear Energy and Engineering chemistry Radiology Nuclear Medicine and imaging Fourier transform infrared spectroscopy Spectroscopy Nuclear chemistry |
| Zdroj: | Journal of Radioanalytical and Nuclear Chemistry. 328:815-824 |
| ISSN: | 1588-2780 0236-5731 |
| DOI: | 10.1007/s10967-021-07730-y |
| Popis: | Solvent impregnated silica gel material was prepared for thorium recovery from its aqueous nitrate solutions using the neutral phosphine oxide extractant, cyanex-923 in toluene. This was achieved by adsorption of the extractant onto the solid phase in three steps. The obtained adsorbent was characterized by means of Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). The relevant factors of extraction such as influence of acid concentration, flow rate and impregnated cyanex 923 amount were optimized by equilibrium column experiments. The results revealed that thorium loaded on 0.5 g cyanex-silica achieved with about 99.6% efficiency. Selective elution of the loaded thorium was carried out in two steps using both sulfuric and hydrochloric acids after volume optimization. Based on the obtained optimum factors, validation of the studied impregnated solid phase occurred on three certified granite samples where the practical applicability was then examined upon two geological samples bearing Th(IV) collected from Abu Zeneima mineralization, South-Western Sinai. |
| Databáze: | OpenAIRE |
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