Poly(amidoxime)-graft-magnetic chitosan for highly efficient and selective uranium extraction from seawater. (1st February 2023)

• Record Type: Journal Article
• Authors: Zhang, Yizhe; Cai, Tingting; Zhao, Zhiwei; Han, Bing
• Is Part Of: Carbohydrate polymers. Volume 301(2023)Part B
• Publication Date: 2023-02-01
• Subjects: Seawater uranium extraction -- Poly(amidoxime) -- Magnetic chitosan -- High selectivity; Polysaccharides -- Periodicals; Polysaccharides -- Periodicals; Polysaccharides -- Périodiques; Electronic journals; 547.78
• DOI: 10.1016/j.carbpol.2022.120367
• Languages: English
• ISSNs: 0144-8617

Abstract

Abstract: Adsorbents with highly efficient and selective recovery performance towards uranium are significantly demanded for the sustainable nuclear power production. Herein, poly(amidoxime)-graft-magnetic chitosan (P(AO)-g-MC) was synthesized through functionalizing magnetic chitosan with polyacrylonitrile followed by amidoximation process. Under magnetic field, P(AO)-g-MC can be separated from the solution in 10 s. Owing to the strong affinity of high-density amidoxime groups towards uranium, P(AO)-g-MC showed remarkable adsorption capacity, rapid kinetics and good regeneration performance in uranium spiked aqueous solution. Notably, the 7-day uranium adsorption capacity of P(AO)-g-MC from natural seawater in column mode was up to 5.14 mg/g, 12 times that of vanadium. The excellent uranium uptake performance over vanadium originated from the strong coordination by N and O in amidoxime groups according to theoretical simulation. The advantages of easy separating and high selectivity make P(AO)-g-MC a very potential uranium adsorbent in natural seawater. Graphical abstract: Illustration of P(AO)-g-MC binding selectively with uranium in natural seawater and easy separation under applied magnetic field. Unlabelled Image