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Ultralight sulfonated graphene aerogel for efficient adsorption of uranium from aqueous solutions

  • Zhibin Zhang
  • Jian Huang
  • Zhimin Dong
  • Bingkun Luo
  • Yuhui Liu
  • Ying Dai
  • Xiaohong Cao
  • Youqun Wang
  • Rong HuaEmail author
  • Yunhai LiuEmail author
Article

Abstract

An ultralight sulfonated graphene aerogel (GA-SO3H) was synthesized via simply gas phase sulfonation and was adopted to adsorb U(VI) from radioactive wastewater. The characterization confirmed plentiful sulfonate groups on GA-SO3H surfaces. GA-SO3H exhibited high U(VI) sorption capacity with maximum amount of 148.4 mg g−1 and reached maximum separation selectivity of 61.38% at 298 K and pH 5.0 due to the surface complexation between the O atoms of sulfonate groups and uranyl ions. Furthermore, GA-SO3H exhibited satisfied regeneration and excellent structural stability. This paper highlighted ultralight GA-SO3H as an efficient adsorbent for effective adsorption/recovery of uranyl ions from radioactive wastewater.

Keywords

Graphene aerogel Sulfonation Uranium Adsorption Interaction mechanism 

Notes

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (21561002, 21866004, 21866003, 21501025, 11605027, 21761002), the China Postdoctoral Science Foundation (2016M600981), the Science & Technology Support Program of Jiangxi Province (Grant No. 2018ACB21007) and the Project of Jiangxi Provincial Department of Education (Grant Nos. GJJ160535, GJJ171515).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no competing interests.

Supplementary material

10967_2019_6641_MOESM1_ESM.docx (235 kb)
Supplementary material 1 (DOCX 235 kb)

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  1. 1.State Key Laboratory of Nuclear Resources and EnvironmentEast China University of TechnologyNanchangPeople’s Republic of China
  2. 2.MOE Key Laboratory of Resources and Environmental Systems Optimization, College of Environmental Science and EngineeringNorth China Electric Power UniversityBeijingPeople’s Republic of China

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