• 文献标题:   The extraction of uranium using graphene aerogel loading organic solution
  • 文献类型:   Article
  • 作  者:   CHEN MM, LI Z, LI JH, LI JG, LI QN, ZHANG L
  • 作者关键词:   solvent extraction, graphene aerogel, superhydrophobic, uranium
  • 出版物名称:   TALANTA
  • ISSN:   0039-9140 EI 1873-3573
  • 通讯作者地址:   Acad Sinica
  • 被引频次:   15
  • DOI:   10.1016/j.talanta.2017.01.070
  • 出版年:   2017

▎ 摘  要

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 316.3 mg g(-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.