期刊
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
卷 300, 期 3, 页码 1235-1244出版社
SPRINGER
DOI: 10.1007/s10967-014-3081-6
关键词
Hydrothermal carbon spheres; Phosphate group; U(VI); Adsorption
资金
- National Natural Science Foundation of China [21101024, 21201033, 21301028]
- National Undergraduate Training Programs for Innovation and Entrepreneurship [201210405006]
- Key Project of Chinese Ministry of Education [211086]
- Young Scientists Training Program of Jiangxi Province [20122BCB23023]
- Natural Science Foundation of Jiangxi Province [20114BAB203002, 20122BAB203012, 20132BAB203027]
- China Postdoctoral Science Foundation [20110490857]
- Jiangxi Provincial Department of Education [GJJ13452]
- Open Project Foundation of Fundamental Science on Radioactive Geology and Exploration Technology Laboratory (East China Institute of Technology) [RGET1311]
The phosphorylated hydrothermal carbon spheres (HCS-PO4) were developed by functionalizing hydrothermal carbon spheres (HCS) with o-phosphoethanolamine, and the structure and textural property were characterized by SEM and FT-IR. The parameters that affect the uranium(VI) sorption, such as solution pH, initial U(VI) concentration, contact time, and temperature, had been investigated. The HCS-PO4 showed the highest uranium sorption capacity at initial pH 6.0 and contact time of 120 min. The adsorption kinetics was better described by the pseudo-second-order model, and the adsorption process could be well defined by the Langmuir isotherm and the maximum monolayer adsorption capacity increased from 80.00 to 434.78 mg/g after phosphorylation. The thermodynamic parameters, a dagger GA degrees (298 K), a dagger HA degrees and a dagger SA degrees, demonstrated shown that the sorption process of U(VI) onto HCS-PO4 was feasible, spontaneous and endothermic in nature. The spent HCS-PO4 could be effectively regenerated by 0.1 mol/L EDTA solution for the removal and recovery of U(VI) and reused for ten cycles at least. Selective adsorption studies showed that the HCS-PO4 could selectively remove U(VI), and the selectivity coefficients of HCS in the presence of co-existing ions, Mg(II), Na(I), Zn(II), Mn(II),Co(II), Ni(II), Sr(II), Cs(I) and Hg(II) improved after functionalization.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据