Volume 131, Issue 34 pp. 11911-11916
Zuschrift

Ultrafast and Highly Selective Uranium Extraction from Seawater by Hydrogel-like Spidroin-based Protein Fiber

Dr. Yihui Yuan

Dr. Yihui Yuan

State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, 570228 P. R. China

These authors contributed equally to this work.

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Qiuhan Yu

Qiuhan Yu

State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, 570228 P. R. China

These authors contributed equally to this work.

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Dr. Jun Wen

Dr. Jun Wen

Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, 621900 P. R. China

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Prof. Chaoyang Li

Prof. Chaoyang Li

State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, 570228 P. R. China

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Prof. Zhanhu Guo

Prof. Zhanhu Guo

Integrated Composites Laboratory (ICL), Department of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN, 37996 USA

College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao, 266590 P. R. China

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Prof. Xiaolin Wang

Prof. Xiaolin Wang

Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang, 621900 P. R. China

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Prof. Ning Wang

Corresponding Author

Prof. Ning Wang

State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan University, Haikou, 570228 P. R. China

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First published: 25 June 2019
Citations: 47

Abstract

For the practical extraction of uranium from seawater, adsorbents with high adsorption capacity, fast equilibrium rate, high selectivity, and long service life are needed. Herein, a chimeric spidroin-based super uranyl-binding protein (SSUP) fiber was designed by fusing the gene of super uranyl-binding protein (SUP) with the gene of spidroin. SUP endowed the SSUP fiber with high affinity and selectivity to uranium, and spidroin gave the SSUP fiber with high mechanical strength and high reusability. The wet SSUP fiber is a water-rich hydrogel-like structure, which provided abundant hydrophilic intermolecular space for the entrance of uranyl ions, and could accelerate the rate for uranium adsorption. In seawater, the SSUP fiber achieved a breakthrough uranium extraction capacity of 12.33 mg g−1 with an ultrashort equilibration time of 3.5 days, suggesting that SSUP fiber might be a promising adsorbent for uranium extraction from the natural seawater.

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