The performance and mechanism of U(VI) removal from aqueous solutions by a metal-organic framework (DUT-69)

被引：5
|
作者：
Chen, Xiang [1 ]
Xie, Shuibo [1 ,2 ]
Wang, Guohua [1 ]
Liu, Haiyan [1 ,2 ]
Guo, Yu [1 ]
Yang, Siqin [1 ]
Wu, Shanshan [1 ]
Liu, Xiaoyang [1 ]
机构：
[1] Univ South China, Sch Civil Engn, Hengyang 421001, Peoples R China
[2] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Peoples R China
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2021年 / 328卷 / 01期
基金：
中国国家自然科学基金;
关键词：
U(VI); Metal– organic frameworks (DUT-69); Zirconium; Adsorption; URANIUM RECOVERY; EFFICIENT REMOVAL; ADSORPTION; MIL-101(CR); EXTRACTION; COMPOSITE; ADSORBENT; WATER; IONS; FUNCTIONALIZATION;
D O I：
10.1007/s10967-021-07645-8
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A zirconium-based metal-organic framework (DUT-69) was fabricated via a hydrothermal synthesis for U(VI) removal in aqueous solutions. Experimental results showed that the maximum adsorption capacity for U(VI) was 362.32 mg center dot g(-1) at 303 K, pH = 6 and initial U(VI) concentration of 80 mg L-1. The adsorption process fit well with the pseudo-second-order kinetic and Langmuir models. Various characterizations indicated that complexation interactions was the central adsorption mechanism and electrostatic was the secondary. The carboxyl, Zr-O, and C-S bonds in the framework participated in the adsorption process. Reusability experiments showed that 80.34% adsorption rate could be maintained after 5 cycles.
引用
收藏
页码：181 / 194
页数：14
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