Graphene oxide based ion-imprinted polymers for selective uranium adsorption from seawater

Preparation of phosphinimide and its adsorption of uranium in aqueous solution

“…The steps to prepare the uranium (VI) stock solution are as follows: 2.110 g of UO2(NO3)26H2O is dissolved in concentrated nitric acid at pH = 1.0 and diluted to a volume of 1 L with deionized water. The resulting uranium (VI) stock solution (pH<2.5) has a concentration of 1.0 gL -1 and can be used as a standard or reference solution for uranium (VI) [23]. The method of preparing the azo arsenic solution is as follows: take 0.1250 g of azo arsenic, add it to 5 mL of nitric acid at pH = 3.0, dissolve it well, and then diluted with distilled water into a 250 mL volumetric flask [24].…”

Efficient and sustainable extraction of uranium from aquatic solution using biowaste-derived active carbon

“…Researchers have made numerous efforts to explore various approaches for extracting uranium including: ion exchange ( Foster et al, 2020 ; Chen et al, 2022 ), chemical precipitation ( Burns et al, 2016 ), solution extraction ( Chen et al, 2018 ), membrane separation ( Hsiue et al, 1989 ) and adsorption technique ( Li et al, 2022 ; Yu et al, 2022 ). Adsorption-based techniques for uranium removal have been considered as one of the facile, economical, and efficient methods and received enormous attention in recent decades ( Yuan et al, 2021 ; Zhu et al, 2023 ). Researchers have proven adsorption being an efficient method for the extraction of many other rare and precious metals including Pd(II) ( Li et al, 2023b ; Cheng et al, 2023 ), Ag ( Shao et al, 2023 ) and gold ( Li et al, 2023c ).…”