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Sunlight Polymerization of Poly(amidoxime) Hydrogel Membrane for Enhanced Uranium Extraction from Seawater.


ABSTRACT: The uranium level in seawater is ?1000 times as high as terrestrial ores and can provide potential near-infinite fuel for the nuclear energy industry. However, it is still a significant challenge to develop high-efficiency and low-cost adsorbents for massively extracting uranium from seawater. Herein, a simple and fast method through low-energy consumption sunlight polymerization to direct fabrication of a poly(amidoxime) (PAO) hydrogel membrane, which exhibits high uranium adsorption capacity, is reported. This PAO hydrogel owns semi-interpenetrating structure and a hydrophilic poly(acrylamide) 3D network of hydrogel which can disperse and fix PAOs well. As a result, the amidoxime groups of PAOs exhibit an outstanding uranium adsorption efficiency (718 ± 16.6 and 1279 ± 14.5 mg g-1 of m uranium/m PAO in 8 and 32 ppm uranium-spiked seawater, respectively) among reported hydrogel-based adsorbents. Most importantly, U-uptake capacity of this hydrogel can achieve 4.87 ± 0.38 mg g-1 of m uranium/m dry gel just after four weeks within natural seawater. Furthermore, this hydrogel can be massively produced through low-energy consumption and environmentally-friendly sunlight polymerization. This work will provide a high-efficiency and low-cost adsorbent for massive uranium extraction from seawater.

SUBMITTER: Ma C 

PROVIDER: S-EPMC6662065 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature

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Sunlight Polymerization of Poly(amidoxime) Hydrogel Membrane for Enhanced Uranium Extraction from Seawater.

Ma Chunxin C   Gao Jinxiang J   Wang Dong D   Yuan Yihui Y   Wen Jun J   Yan Bingjie B   Zhao Shilei S   Zhao Xuemei X   Sun Ye Y   Wang Xiaolin X   Wang Ning N  

Advanced science (Weinheim, Baden-Wurttemberg, Germany) 20190404 13


The uranium level in seawater is ≈1000 times as high as terrestrial ores and can provide potential near-infinite fuel for the nuclear energy industry. However, it is still a significant challenge to develop high-efficiency and low-cost adsorbents for massively extracting uranium from seawater. Herein, a simple and fast method through low-energy consumption sunlight polymerization to direct fabrication of a poly(amidoxime) (PAO) hydrogel membrane, which exhibits high uranium adsorption capacity,  ...[more]

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