Extraction chromatographic separation of thorium by silica gel impregnated with cyanex 923

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 characte...

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Bibliographic Details
Published inJournal of radioanalytical and nuclear chemistry Vol. 328; no. 3; pp. 815 - 824
Main Authors Weheish, Hany Lotfy, Ahmed, Sherien Hussien, Abdou, Abdou Ali, Orabi, Ahmed Hussien, Mahmoud, Wagiha Hamed
Format Journal Article
LanguageEnglish
Published Cham Springer International Publishing 01.06.2021
Springer
Springer Nature B.V
Subjects
Adsorption
Chemistry
Chemistry and Materials Science
Chromatography
Diagnostic Radiology
Flow velocity
Fourier transforms
Hadrons
Heavy Ions
Hydrochloric acid
Infrared spectroscopy
Inorganic Chemistry
Nuclear Chemistry
Nuclear Physics
Optimization
Phosphine oxide
Physical Chemistry
Silica
Silica gel
Silicon dioxide
Solid phases
Thorium
Toluene
Nitric acid medium
Silica gel impregnated cyanex 923
Extraction chromatography
Thorium
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Summary: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.
ISSN:0236-5731
1588-2780
DOI:10.1007/s10967-021-07730-y