3D hierarchical porous amidoxime fibers speed up uranium extraction from seawater†,Energy & Environmental Science

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3D hierarchical porous amidoxime fibers speed up uranium extraction from seawater†
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2019-04-25 00:00:00 , DOI: 10.1039/c9ee00626e
Xiao Xu _{1,

2,

3,

4,

5} , Hongjun Zhang _{4,

6,

7,

8} , Junxuan Ao _{1,

2,

3,

4,

9} , Lu Xu _{1,

2,

3,

4} , Xiyan Liu _{1,

2,

3,

4} , Xiaojing Guo _{4,

10,

11,

12} , Jingye Li _{1,

2,

3,

4} , Lan Zhang _{1,

2,

3,

4} , Qingnuan Li _{1,

2,

3,

4} , Xiaoyan Zhao _{4,

5,

13,

14} , Bangjiao Ye _{4,

6,

7,

8} , Deli Wang _{4,

15,

16,

17} , Fei Shen _{2,

4,

9,

18,

19} , Hongjuan Ma _{1,

2,

3,

4}

Affiliation

Shanghai Institute of Applied Physics
Chinese Academy of Sciences
Shanghai 201800
China
School of Petrochemical Engineering
State Key Laboratory of Particle Detection and Electronics
University of Science and Technology of China
Hefei 230026
University of Chinese Academy of Sciences
The Department of Chemistry and Chemical Engineering
Shanghai Normal University
Shanghai 200234
Changzhou University
Changzhou 213164
State Key Laboratory of Marine Environmental Science
Xiamen University
Xiamen 361005
Beijing 100049
Institute of Process Engineering

The development of amidoxime-based polymeric (ABP) fibers offers a solution for uranium extraction from seawater (UES) and provides an alternative solution to the uranium resource shortage. However, ABP adsorbents prepared by existing methods cannot meet the requirements of high adsorption capacity, high selectivity, good mechanical strength and long service life. Herein, we fabricated a 3D hierarchical porous, high specific surface area ABP (H-ABP) fiber via self-assembly of axial grafting chains. A high adsorption capacity of 11.50 mg-U per g-adsorbents was achieved in natural seawater, which is a significant breakthrough in UES. Meanwhile, the adsorption capacity of uranium was higher than its major competing element vanadium, which overturned the U/V mass ratio of the ABP fiber. The H-ABP fiber also exhibited good mechanical strength and a long service life of at least 10 adsorption–desorption cycles. The well-designed structure resulted in groundbreaking properties, which completely meet the requirements for the economic evaluation of UES. This work presents a new technology for the synthesis of highly efficient adsorbents for UES, thus opening a whole new means of nuclear fuel production from the ocean.

中文翻译：

3D分层多孔a胺肟纤维可加速从海水中提取铀†

氨基mid肟基聚合物（ABP）纤维的发展为从海水（UES）中提取铀提供了解决方案，并为铀资源短缺提供了另一种解决方案。然而，现有方法制备的ABP吸附剂不能满足高吸附容量，高选择性，良好的机械强度和长使用寿命的要求。在此，我们制造的三维分级多孔，高比表面积ABP（H-ABP）纤维通过轴向嫁接链的自组装。在天然海水中实现了每克吸附剂11.50 mg-U的高吸附能力，这是UES的一项重大突破。同时，铀的吸附能力高于其主要竞争元素钒，从而推翻了ABP纤维的U / V质量比。H-ABP纤维还表现出良好的机械强度和至少10个吸附-解吸循环的较长使用寿命。精心设计的结构带来了突破性的性能，完全满足了UES经济评估的要求。这项工作提出了一种合成UES高效吸附剂的新技术，从而开辟了一种从海洋生产核燃料的全新方式。

更新日期：2019-04-25

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