Removal of uranium(VI) and thorium(IV) by insolubilized humic acid originated from Azraq soil in Jordan
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- 作者：Fawwaz I. Khalili ; Alia’a Khalifa…
- 关键词：Azraq humic ; Insolubilized ; Sorption ; Kinetic ; Thermodynamic ; Thorium(IV) ; Uranium(VI)
- 刊名：Journal of Radioanalytical and Nuclear Chemistry
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：311
- 期：2
- 页码：1375-1392
- 全文大小：
- 刊物类别：Chemistry and Materials Science
- 刊物主题：Nuclear Chemistry; Physical Chemistry; Nuclear Physics, Heavy Ions, Hadrons; Diagnostic Radiology; Inorganic Chemistry;
- 出版者：Springer Netherlands
- ISSN：1588-2780
- 卷排序：311
文摘
Humic acid from Azraq soil in Jordan has been extracted and insolubilized as the sodium form (INaAZHA). It was characterized by Fourier transform infrared spectroscopy, elemental analysis, thermal gravimetric analysis, X- ray diffraction, scanning electron microscopy and differential scanning calorimetry. Sorption of Th(IV) and U(VI) by INaAZHA was studied using batch and column. The kinetic studies fitted pseudo second–order kinetic model. The data were fitted to Langmuir, Freundlich and Dubinin–Radushkevich (D–R) sorption isotherms. Thermodynamic functions, ΔG°, ΔH° and ΔS° were determined for the sorption. Desorption from column was best using 1.0 M than 0.5 and 0.1 M HNO3 for both.