Improvement of U(VI) removal by tuning magnetic metal organic frameworks with amine ligands

被引:22
作者
Chen, Weiwei [1 ]
Cai, Yawen [1 ]
Lv, Zhimin [1 ]
Wang, Xin [1 ]
Feng, Jinghua [1 ]
Fang, Ming [1 ]
Tan, Xiaoli [1 ]
机构
[1] North China Elect Power Univ, Coll Environm Sci & Engn, MOE Key Lab Resources & Environm Syst Optimizat, Beijing 102206, Peoples R China
基金
中国国家自然科学基金;
关键词
Mag MOF-NH2; Adsorption; U(VI); Mechanism; Functionalization; EFFICIENT REMOVAL; ENHANCED ADSORPTION; HIGHLY EFFICIENT; DOUBLE HYDROXIDE; GRAPHENE OXIDE; URANIUM; RECOVERY; FABRICATION; ADSORBENT; COMPOSITE;
D O I
10.1016/j.molliq.2021.116495
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A magnetic metal organic framework was finely tuned by abundant amine groups (Mag MOF-NH2) for the purpose of improving the U(VI) removal from solution. The Mag MOF-NH2 displays outstanding removal capacity (80 mg.g(-1)) to U(VI) (10 ppm, 400 mL) within 15 min. To illuminate the adsorption mechanism of Mag MOF-NH2, the microstructure, the magnetic property, chemical composition of Mag MOF-NH2 and the reaction system were characterized. The adsorption mechanism was systematically investigated. Equilibrium adsorption experiments verifies the improved adsorption capability from nearly 0 for MIL101 to 82 mg.g(-1) for Mag MOF-NH2, which could be explained mainly by the interaction between the amine groups and targeted ions. The effect of humic acid (HA) and coexisting ions on the U(VI) adsorption were also investigated. The Ca2+ and Mg2+ ions have passive impact on the adsorption and the high pH value can facilitate the process. Mag MOF-NH2 holds great potential for the practical application owing to the outstanding U(VI) removal and satisfied regeneration in simulative wastewaters. (C) 2021 Published by Elsevier B.V.
引用
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页数:10
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