Uranium(VI) recovery from acidic leach liquor using manganese oxide coated zeolite (MOCZ) modified with amine

被引：9
|
作者：
Yousef, L. A. [1 ]
Bakry, A. R. [1 ]
Ahmad, A. A. [1 ]
机构：
[1] Nucl Mat Author, Cairo, Egypt
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2020年 / 324卷 / 01期
关键词：
MOCZ; TOA; Uranium(VI); Kinetic; Equilibrium; Adsorption; Elution; ION-EXCHANGE; ADSORPTION-ISOTHERMS; AQUEOUS-SOLUTIONS; VI ADSORPTION; REMOVAL; EQUILIBRIUM; SORPTION; THORIUM; ALUMINOSILICATES; THERMODYNAMICS;
D O I：
10.1007/s10967-020-07042-7
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Manganese oxide coated zeolite modified with trioctyl amine (MOCZ/TOA) was tested for adsorption of uranium. Different experiments were performed to evaluate the optimum adsorption conditions; pH, dose, uranium concentration, temperature variation and contact time. Maximum adsorption capacity reached 99 mg/g according to Langmuir model. The study of thermodynamic parameters showed that sorption process is non spontaneous, exothermic and random. Studies on process kinetics showed that the process obeys pseudo-second order model. Uranium desorption was accomplished using 0.3 M H2SO4. Optimum conditions were carried out for uranium recovery from sedimentary geologic sample from Gattar area, North Eastern Desert, Egypt. The final uranium precipitate was characterized by ICP-OES technique.
引用
收藏
页码：409 / 421
页数：13
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