Adsorption of U(VI) from acid solution on a low-cost sorbent: equilibrium, kinetic, and thermodynamic assessments

被引：37
作者：
Cheira, Mohamed F. [1 ]
Mira, Hamed I. [1 ]
Sakr, Ahmed K. [1 ]
Mohamed, Saad A. [2 ]
机构：
[1] Nucl Mat Author, POB 530, Cairo, Egypt
[2] Ain Shams Univ, Fac Sci, Chem Dept, Cairo, Egypt
来源：
NUCLEAR SCIENCE AND TECHNIQUES | 2019年 / 30卷 / 10期
关键词：
Waste clay; Gallic acid; Modification; Uranium adsorption; Equilibrium kinetics; SPENT BLEACHING EARTH; URANIUM ADSORPTION; URANYL IONS; MODEL; KAOLINITE; SORPTION; MONTMORILLONITE; ADSORBENTS; RECOVERY; REMOVAL;
D O I：
10.1007/s41365-019-0674-3
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
In this paper, waste clay was cured with ethyl acetate to obtain treated clay (TC), which was modified with gallic acid to obtain a low-cost sorbent that was characterized by EDX, SEM, and FTIR analysis. Uranium(VI) adsorption was achieved using the batch adsorption method on the TC and gallic acid-modified treated clay (GMTC). The maximum uptakes of U(VI) on TC and GMTC were 37.2 and 193.0 mg/g, respectively. The U(VI) adsorption kinetics on the TC and GMTC sorbents were well-fitted by the pseudo-second-order mechanism, and the adsorption equilibrium followed the Langmuir model. The optimum parameters were applied to El Sela leach solution for uranium recovery.
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页数：18
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