Phytic acid modified NH2-MIL-101 via Mannich reaction for highly efficient uranium extraction from seawater

被引:0
作者
Su, Xin [1 ]
Wang, Yudan [1 ]
Liu, Lijia [1 ,2 ]
Dong, Hongxing [1 ]
机构
[1] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Key Lab Superlight Mat & Surface Technol, Minist Educ, Harbin 150001, Peoples R China
[2] Harbin Engn Univ, Yantai Res Inst, Yantai 264006, Peoples R China
关键词
MOF; Adsorption; Phosphorylation; Uranium (VI); Seawater; FUNCTIONALIZED GRAPHENE OXIDE; ADSORPTION; REMOVAL; NANOFILTRATION; PERFORMANCE; MIL-101(CR); RECOVERY;
D O I
10.1016/j.rineng.2023.101399
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
An essential part of achieving sustainable uranium resource development was the search for a suitable adsorbent capable of efficiently capturing uranium (VI) from seawater. Here, a modified metal-organic framework (PA-MIL-101) was prepared by phosphorylation of NH2-MIL-101 with phytic acid (PA). PA-MIL-101 exhibited a specific surface area of 252 m(2)center dot g(-1) and proved exceptionally adept at extracting uranium (VI) from seawater. Batch experiments were conducted to examine how environmental conditions such as pH and natural seawater affect the uranium adsorption performance of the materials. The adsorption capacity of PA-MIL-101 exhibited a remarkable performance, showcasing a substantial 41.8% increase compared to NH2-MIL-101 (the adsorption capacity increased to 416.7 mg center dot g(-1) at pH = 7 in 100 mg center dot L-1 U(VI) solution). Due to the fast adsorption kinetics, PA-MIL-101 achieves a saturation level of 72.1% within the first 5 min. The removal rate was further elevated to 88.48% in the more intricate natural seawater. The reusability of PA-MIL-101 was demonstrated through five recycling cycles. The porous material PA-MIL-101 has abundant P=O and P-OH active sites, which can strongly complex with uranium (VI). This feature makes PA-MIL-101 perform effective in natural seawater. Therefore, PA-MIL-101 is considered as a promising supersorbent for efficient removal of uranium (VI).
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页数:11
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