Bio-inspired nano-traps for uranium extraction from seawater and recovery from nuclear waste

Qi Sun; Briana Aguila; Jason Perman; Aleksandr S. Ivanov; Vyacheslav S. Bryantsev; Lyndsey D. Earl; Carter W. Abney; Lukasz Wojtas; Shengqian Ma

doi:10.1038/s41467-018-04032-y

Bio-inspired nano-traps for uranium extraction from seawater and recovery from nuclear waste

Qi Sun, Briana Aguila, Jason Perman, Aleksandr S. Ivanov, Vyacheslav S. Bryantsev, Lyndsey D. Earl, Carter W. Abney, Lukasz Wojtas, Shengqian Ma

Research output: Contribution to journal › Article › peer-review

388 Scopus citations

Abstract

Nature can efficiently recognize specific ions by exerting second-sphere interactions onto well-folded protein scaffolds. However, a considerable challenge remains to artificially manipulate such affinity, while being cost-effective in managing immense amounts of water samples. Here, we propose an effective approach to regulate uranyl capture performance by creating bio-inspired nano-traps, illustrated by constructing chelating moieties into porous frameworks, where the binding motif's coordinative interaction towards uranyl is enhanced by introducing an assistant group, reminiscent of biological systems. Representatively, the porous framework bearing 2-aminobenzamidoxime is exceptional in sequestering high uranium concentrations with sufficient capacities (530 mg g^-1) and trace quantities, including uranium in real seawater (4.36 mg g^-1, triple the benchmark). Using a combination of spectroscopic, crystallographic, and theory calculation studies, it is revealed that the amino substituent assists in lowering the charge on uranyl in the complex and serves as a hydrogen bond acceptor, boosting the overall uranyl affinity of amidoxime.

Original language	English
Article number	1644
Journal	Nature Communications
Volume	9
Issue number	1
DOIs	https://doi.org/10.1038/s41467-018-04032-y
State	Published - Dec 1 2018

Funding

This work was supported by the DOE Office of Nuclear Energy’s Nuclear Energy University Program (Grant No. DE-NE0008281). Work by L.D.E and C.W.A was supported financially by the Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences, U.S. Department of Energy. This manuscript has been authored by UT-Battelle, LLC under Contract No. DE-AC05-00OR22725 with the U.S. Department of Energy. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a non-exclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Department of Energy will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http:// energy.gov/downloads/doe-public-access-plan). Use of the Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, is supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under Contract No. DE-AC02-76SF00515.

Funders	Funder number
U.S. Department of Energy	DE-AC05-00OR22725
Office of Science	DE-AC02-76SF00515
Office of Nuclear Energy
Basic Energy Sciences
Nuclear Energy University Program	DE-NE0008281
Chemical Sciences, Geosciences, and Biosciences Division

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abstract = "Nature can efficiently recognize specific ions by exerting second-sphere interactions onto well-folded protein scaffolds. However, a considerable challenge remains to artificially manipulate such affinity, while being cost-effective in managing immense amounts of water samples. Here, we propose an effective approach to regulate uranyl capture performance by creating bio-inspired nano-traps, illustrated by constructing chelating moieties into porous frameworks, where the binding motif's coordinative interaction towards uranyl is enhanced by introducing an assistant group, reminiscent of biological systems. Representatively, the porous framework bearing 2-aminobenzamidoxime is exceptional in sequestering high uranium concentrations with sufficient capacities (530 mg g-1) and trace quantities, including uranium in real seawater (4.36 mg g-1, triple the benchmark). Using a combination of spectroscopic, crystallographic, and theory calculation studies, it is revealed that the amino substituent assists in lowering the charge on uranyl in the complex and serves as a hydrogen bond acceptor, boosting the overall uranyl affinity of amidoxime.",

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AU - Earl, Lyndsey D.

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Bio-inspired nano-traps for uranium extraction from seawater and recovery from nuclear waste

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