High-capacity uranium extraction from seawater through constructing synergistic multiple dynamic bonds

被引：11

作者：

Yuan, Ye ^{[1
]}

Cao, Doudou ^{[1
]}

Cui, Fengchao ^{[1
]}

Yang, Yajie ^{[2
,3
]}

Zhang, Cheng ^{[1
]}

Song, Yingbo ^{[1
]}

Zheng, Yue ^{[1
]}

Cao, Jiarui ^{[1
]}

Chen, Shusen ^{[4
]}

Song, Yan ^{[4
]}

Wang, Fengju ^{[4
]}

Zhu, Guangshan ^{[1
]}

机构：

[1] Northeast Normal Univ, Fac Chem, Key Lab Polyoxometalate & Reticular Mat Chem, Minist Educ, Changchun, Peoples R China

[2] Jilin Univ, Minist Educ, Key Lab Automobile Mat, Changchun, Peoples R China

[3] Jilin Univ, Sch Mat Sci & Engn, Changchun, Peoples R China

[4] Beijing Res Inst Chem Engn & Met, CNNC Key Lab Uranium Extract Seawater, Beijing, Peoples R China

来源：

NATURE WATER | 2025年 / 3卷 / 01期

基金：

中国国家自然科学基金; 国家重点研发计划;

关键词：

COVALENT ORGANIC FRAMEWORKS; RECOVERY;

D O I：

10.1038/s44221-024-00346-y

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Seawater is the largest uranium reserve in the world, and the efficient extraction of uranium from seawater could facilitate the sustainable development of the nuclear industry for thousands of years. However, conventional extraction processes must suffer the dissociation of CO32- ions from [UO2(CO3)(3)](4-) anions to bind the uranyl core, which has a high energy barrier, resulting in poor selectivity and long working times. Here we combine a molecular templating strategy to synthesize several hydroxy-rich covalent organic frameworks with tunable nanopore sizes. In the 1.2-nm-sized covalent organic framework cavity, hydroxyl groups coupled with the hydrogen-bonded NH4+ cations selectively bind uranyl tricarbonate ions via synergistic electrostatic and hydrogen-bonding interactions. This framework exhibits high uranium extraction capability with a removal ratio of > 99.99% in 400 min (initial concentration of 5 ppm at 298 K, pH = 8-9). Notably, a record uranium adsorption uptake is achieved with a capacity of 23.66 mg g(-1) in seven days from natural seawater, surpassing that of classical amidoxime-based adsorbents by a factor of 350%.

引用

页码：89 / 98

页数：10

共 57 条

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[Anonymous], 2021, Uranium 2020

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