期刊
CHEMICAL ENGINEERING JOURNAL
卷 431, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2021.133483
关键词
Single atom; Uranium extraction; Nanozyme; Biofouling; Reusability
资金
- Natural Science Foundation of Hainan Province [2019RC015]
- National Natural Science Foundation of China [52172195, 51775152, 61761016, U1967213]
- Hainan Science and Technology Major Project [ZDKJ2019013]
- National Key R&D program of China [2018YFE0103500]
A reusable nanozyme was constructed for uranium recovery from seawater using atomically dispersed tungsten anchored on metal organic frameworks. The nanozyme demonstrated strong antibiofouling activity and maintained high uranium capture capacity after multiple cycles.
Uranium is the essential element for nuclear power industry. Selective uranium extraction from seawater is very attractive, but challenging because ubiquitous marine biofouling seriously impairs the uranium extraction ca-pacity and reusability of absorbents in bio-aggressive seawater. Herein, we construct a reusable nanozyme for uranium recovery from seawater based on atomically dispersed tungsten anchored on metal organic frameworks (W-UiO). We illustrate that W-UiO nanozyme mimics naturally occurring vanadium haloperoxidase that cata-lytically converting halides to biocidal hypobromous acid, inducing strong antibiofouling activity against marine microbial colonization. As demonstrated, W-UiO nanozyme shows superb reusability in raw seawater simulta-neously, preserving a 78.0% of its initial uranium capture capacity (6.8 times higher than its pristine counter-part) after five consecutive adsorption-desorption cycles. This study is anticipated to spur rationally realizing robust absorbents by mimicking the natural enzymes for practical application in uranium recovery from seawater.
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