HDEHP-Impregnated Kaolinite for Adsorption of Uranium from Dilute Phosphoric Acid
- 作者: El-Maadawy M.1
-
隶属关系:
- Nuclear Materials Authority
- 期: 卷 61, 编号 3 (2019)
- 页面: 331-338
- 栏目: Article
- URL: https://journals.rcsi.science/1066-3622/article/view/225166
- DOI: https://doi.org/10.1134/S1066362219030081
- ID: 225166
如何引用文章
详细
Impregnation of kaolinite with di(2-ethylhexyl) hydrogen phosphate (HDEHP) improves the uranium adsorption from commercial phosphoric acid. The uranium adsorption was studied as a function of conditions: contact time, solid/liquid ratio, temperature, mechanical stirring speed, and phosphoric acid concentration, and the optimum conditions were determined. The adsorbent was characterized by the X-ray fluorescence and FTIR spectroscopy. The results show that 92% of uranium was adsorbed from commercial phosphoric acid (30% P2O5) onto impregnated kaolinite at room temperature after 30-min contact. The adsorption kinetics was analyzed by the pseudo-first- and pseudo-second-order models, with the pseudo-second-order model giving better fit. The thermodynamic functions (ΔH0, ΔS0, and ΔG0) of the uranium adsorption show that the process is exothermic and spontaneous.
作者简介
M. El-Maadawy
Nuclear Materials Authority
编辑信件的主要联系方式.
Email: elma3dawi@yahoo.com
埃及, El Maddi, Cairo