title: The extraction of uranium using graphene aerogel loading organic solution.
abstract: A new approach for uranium extraction employing graphene aerogel (GA) as a skeleton loading organic solution (GA-LOS) is proposed and investigated. Firstly, the GA with super-hydrophobicity and high organic solution absorption capacity was fabricated by one-step reduction and self-assembly of graphene oxide with ethylenediamine. By adsorbing Tri-n-butyl phosphate (TBP)/n-dodecane solution to prepare GA-LOS, the extraction of U(VI) from nitric acid medium using GA-LOS was investigated and compared with conventional solvent extraction. It is found that the GA-LOS method can provide several advantages over conventional solvent extraction and adsorption due to the elimination of aqueous-organic mixing-separation procedures and easy solid-liquid separation. Furthermore, it also possesses higher extraction capacity (the saturated extraction capacity of GA loading TBP for U(VI) was 316.3mgg-1) and lower consumption of organic diluents, leading to less organic waste. Moreover, the stability of GA-LOS in aqueous solution and cycling test were also studied, and it shows a remarkable regeneration capability, making it an ideal candidate for metal extraction from aqueous solution.
authors.affiliation: Center for Excellence TMSR Energy System, Shanghai Institute of Applied Physics, Chinese Academy of Science, 2019 Jia Luo Road, Jiading District, Shanghai 201800, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China.
authors.forename: Mumei
authors.initials: M
authors.lastname: Chen
authors.affiliation: Center for Excellence TMSR Energy System, Shanghai Institute of Applied Physics, Chinese Academy of Science, 2019 Jia Luo Road, Jiading District, Shanghai 201800, People's Republic of China. Electronic address: lizheng04@sinap.ac.cn.
authors.forename: Zheng
authors.initials: Z
authors.lastname: Li
authors.affiliation: Center for Excellence TMSR Energy System, Shanghai Institute of Applied Physics, Chinese Academy of Science, 2019 Jia Luo Road, Jiading District, Shanghai 201800, People's Republic of China.
authors.forename: Jihao
authors.initials: J
authors.lastname: Li
authors.affiliation: Center for Excellence TMSR Energy System, Shanghai Institute of Applied Physics, Chinese Academy of Science, 2019 Jia Luo Road, Jiading District, Shanghai 201800, People's Republic of China.
authors.forename: Jingye
authors.initials: J
authors.lastname: Li
authors.affiliation: Center for Excellence TMSR Energy System, Shanghai Institute of Applied Physics, Chinese Academy of Science, 2019 Jia Luo Road, Jiading District, Shanghai 201800, People's Republic of China.
authors.forename: Qingnuan
authors.initials: Q
authors.lastname: Li
authors.affiliation: Center for Excellence TMSR Energy System, Shanghai Institute of Applied Physics, Chinese Academy of Science, 2019 Jia Luo Road, Jiading District, Shanghai 201800, People's Republic of China. Electronic address: zhanglan@sinap.ac.cn.
authors.forename: Lan
authors.initials: L
authors.lastname: Zhang
keywords: Graphene aerogel; Solvent extraction; Superhydrophobic; Uranium