Separation of Y from Sr by zirconium vanadate gel ion-exchanger sorbent: kinetics and thermodynamic study
| Autor: | S. M. Saad, A. Abd El-Mohty, M.S. El-Shahawi, S. H. El-Khouly, Mohammad W. Kadi, N. E. A. Eweda |
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| Rok vydání: | 2012 |
| Předmět: |
Exothermic reaction
Aqueous solution Sorbent Ion exchange Chemistry Health Toxicology and Mutagenesis Kinetics Inorganic chemistry Public Health Environmental and Occupational Health Sorption Pollution Analytical Chemistry Zirconium vanadate Reaction rate constant Nuclear Energy and Engineering Radiology Nuclear Medicine and imaging Spectroscopy Nuclear chemistry |
| Zdroj: | Journal of Radioanalytical and Nuclear Chemistry. 295:15-22 |
| ISSN: | 1588-2780 0236-5731 |
| DOI: | 10.1007/s10967-012-1892-x |
| Popis: | A new zirconium vanadate (Zr–V) ion-exchanger was synthesized and characterized for fast and selective separation procedure of 90Y from 89Sr. The method was based on 90Y(III) sorption from aqueous HCl solution containing 89Sr(II) onto Zr–V gel exchanger. The kinetics of Y(III) sorption from HCl solution by Zr–V exchanger was subjected to Weber–Morris, Lagergren, Bhattacharya and Venkobachar, and Bt models. Initially, the uptake of Y(III) onto the exchanger was fast followed by kinetically first-order sorption with an overall rate constant, KLager = (3.55 ± 0.03) × 10−4 min−1. Film and intraparticle transport are the two steps that might influence Y(III) sorption. The negative values of ΔG of 90Y retention dictate that, the process is a spontaneous. The negative values of ΔH and ΔS reflect the exothermic nature of 90Y(IIsorption and the random uptake of 90Y(III) onto Zr–V sorbent. Zr–V exchanger offers unique advantages of 90Y(III) retention over conventional solid sorbents in rapid and effective separation of traces of 90Y(III) from Sr. The exchanger was successfully packed in column for an effective separation of 90Y. |
| Databáze: | OpenAIRE |
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