Removal of uranium from aqueous solutions using amine-functionalized magnetic platelet large-pore SBA-15

被引：12
|
作者：
Liu, Shuqiong [1 ]
Luo, Jianqiang [2 ]
Ma, Jianguo [3 ]
Li, Jianqiang [3 ]
Li, Song [3 ]
Meng, Lina [3 ]
Liu, Shujuan [3 ]
机构：
[1] East China Jiaotong Univ, Sch Civil Engn & Architecture, Nanchang, Jiangxi, Peoples R China
[2] East China Univ Technol, Key Lab Polymer Micro Nano Mfg & Devices, Nanchang, Jiangxi, Peoples R China
[3] East China Univ Technol, State Key Lab Nucl Resources & Environm, Nanchang 330013, Jiangxi, Peoples R China
来源：
JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY | 2021年 / 58卷 / 01期
基金：
中国国家自然科学基金;
关键词：
Large-pore SBA-15; amine-functionalization; uranium; adsorption; SHORT-CHANNEL SBA-15; MESOPOROUS SILICA; GRAPHENE OXIDE; SELECTIVE HYDROGENATION; EFFICIENT SORPTION; ADSORPTION; U(VI); ION; MODEL; EQUILIBRIUM;
D O I：
10.1080/00223131.2020.1796838
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：
A novel amine-functionalized magnetic large-pore SBA-15 obtained via in situ approach and the post-grafting method was employed as a new adsorbent for removal of uranium from aqueous solutions. Results indicated that the as-prepared adsorbent exhibited fast adsorption rates in the first hour, at the optimum pH 6. The adsorption process was fitted well to the Langmuir isothermal and the maximum adsorption capacity obtained from the Langmuir model was 395.05 mg/g for NH2-M-SBA-15 sample. The kinetics of the uranium adsorption process over NH2-M-SBA-15 was described by pseudo-second-order kinetics. In comparison with the pristine large-pore SBA-15, the adsorption performance of NH2-M-SBA-15 was improved significantly. The thermodynamic parameters revealed that the adsorption of uranium on the material was spontaneous and endothermic. Furthermore, excellent recyclability could be achieved even after four consecutive adsorption-desorption cycles.
引用
收藏
页码：29 / 39
页数：11
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