Green synthesis of citric acid-crosslinked β-cyclodextrin for highly efficient removal of uranium(VI) from aqueous solution

被引：34
作者：
Li, Wei [1 ,2 ]
Liu, Huijun [1 ,2 ]
Li, Liuxing [1 ]
Liu, Kai [1 ]
Liu, Juan [1 ]
Tang, Ting [1 ]
Jiang, Wenkang [1 ]
机构：
[1] Univ South China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China
[2] Univ South China, Hunan Key Lab Design & Applicat Actinide Complexe, Hengyang 421001, Hunan, Peoples R China
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2019年 / 322卷 / 03期
关键词：
beta-cyclodextrin; Citric acid; Polymer; Uranium; Adsorption; BISPHENOL-A; ADSORPTION; POLYMER; WATER; ADSORBENT; KINETICS; RECOVERY; VI;
D O I：
10.1007/s10967-019-06901-2
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
In this paper, a green synthesized citric acid-crosslinked beta-cyclodextrin polymer (CA-beta-CD) was applied in removing uranium from aqueous solutions. Citric acid acts not only as cross-linker but also as functional groups for providing adsorption sites. The adsorption properties by varying experimental conditions were carried out by batch tests. The maximum adsorption capacity could reach 150 mg g(-1). Adsorption process was fitted better with the pseudo-second-order and Freundlich model. Thermodynamic studies proved that adsorption process was spontaneous and endothermic. More significantly, the polymer showed high selectivity for uranium and excellent reusability, demonstrating that CA-beta-CD can be utilized as a promising adsorbent for uranium.
引用
收藏
页码：2033 / 2042
页数：10
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