High-efficiency enrichment of uranium(VI) from aqueous solution by hydromagnesite and its calcination products

被引：5
作者：
Wang, Yunsheng [1 ]
Chen, Yuantao [1 ]
Liu, Chen [1 ]
Yu, Fang [1 ]
机构：
[1] Qinghai Normal Univ, Sch Chem & Chem Engn, Xining 810008, Qinghai, Peoples R China
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2018年 / 315卷 / 02期
基金：
中国国家自然科学基金;
关键词：
Uranium(VI); Hydromagnesite; Uranium enrichment; Surface complexation; Sorption thermodynamics; ADSORPTION CAPACITY; URANYL MINERALS; XPS SPECTRA; METAL-IONS; SORPTION; REMOVAL; MICROSPHERES; U(VI); MECHANISM; MEMBRANE;
D O I：
10.1007/s10967-017-5661-8
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The removal of uranium from aqueous solution by hydromagnesite and its calcination products was investigated. Through the study, we found that the adsorption capacities of hydromagnesite, magnesium carbonate and magnesium oxide for uranium could reach 342.96, 493.79, 2154.14 mg g(-1), respectively. The high temperature will reduce the activity of magnesium oxide, resulting in the adsorption capacity decrease. The results indicate that the optimum pH for the heat-treated samples was 3.0-4.5 and for hydromagnesite 6.0-7.0. Thermodynamic parameters such as a dagger G, a dagger H and a dagger S, indicated that the adsorption processes are spontaneous and endothermic.
引用
收藏
页码：171 / 183
页数：13
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