Performance and mechanism for U(VI) adsorption in aqueous solutions with amino-modified UiO-66

被引：17
作者：
Li, Shiyou [1 ,2 ]
Jin, Yuanyuan [1 ]
Hu, Zhongqing [1 ]
Liu, Ying [1 ]
Wu, Suiyi [1 ]
Wang, Yue [1 ]
Wang, Guohua [1 ,2 ]
机构：
[1] Univ South China, Hunan Prov Key Lab Pollut Control & Resources Tec, Hengyang 421001, Peoples R China
[2] Univ South China, Key Discipline Lab Natl Def Biotechnol Uranium Mi, Hengyang 421001, Hunan, Peoples R China
来源：
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY | 2021年 / 330卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Amino-modified metal-organic framework (UiO-66-NH2); Uranium; Characterization; Adsorption performance; Adsorption mechanism; METAL-ORGANIC FRAMEWORKS; MICROWAVE-ASSISTED SYNTHESIS; EFFICIENT REMOVAL; URANIUM ADSORPTION; WASTE-WATER; MOFS; EXTRACTION; REDUCTION; RECOVERY; NANO;
D O I：
10.1007/s10967-021-07968-6
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
The adsorption performance and mechanism of the amino-modified zirconium-based metal organic framework (UiO-66-NH2) for the removal of U(VI) in aqueous solution were studied. Compared with UiO-66, UiO-66-NH2 shows better adsorption performance due to the introduction of amino groups. The adsorption characteristics of factors such as pH, UiO-66-NH2 dosage and contact time were investigated. The results show that the maximum adsorption capacity is 384.6 mg g(-1) at pH = 6 and T = 313 K. The adsorption conforms to the quasi-second-order kinetic model and the Langmuir isotherm model. The thermodynamic parameters indicate that the adsorption process of U(VI) is endothermic and spontaneous. After five cycles, the removal rate of U(VI) still exceeded 83.53%. The results indicate that UiO-66-NH2 is a promising adsorbent that can effectively remove U(VI) in radioactive wastewater.
引用
收藏
页码：857 / 869
页数：13
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