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Highly efficient sorption of U(VI) from aqueous solution using amino/amine-functionalized magnetic mesoporous silica nanospheres

  • Limin Zhou
  • Jinbo Ouyang
  • Zhirong Liu
  • Guolin Huang
  • Yun Wang
  • Zhao Li
  • Adesoji A. Adesina
Article

Abstract

The amino/amine-functionalized magnetic mesoporous silica nanospheres (MSN-DETA) exhibited relatively high sorption capacity (qm = 153.68 mg/g) as well as excellent selectivity for U(VI). The U4f7/2 X-ray photoelectron spectrometry revealed two binding energies at 380.8 ± 0.3 eV (with the proportion of 75.2%) and 382.3 ± 0.3 eV, which indicated the inner-surface complexation mechanism. The sorption isotherms fitted well with the Langmuir model, whereas the sorption kinetics could be fitted by pseudo-second-order model. The U(VI)-loaded MSN-DETA could be efficiently regenerated by acidified EDTA (0.4 M). These findings indicated that MSN-DETA could be used as a potential material for the efficient sorption/separation of U(VI) from wastewater.

Keywords

Silica Magnetic sorbents Amino/amine functionalization U(VI) Adsorption 

Notes

Acknowledgements

The work is financially supported by the National Natural Science Foundation (21667001; 21866002; 21866005; 21706028; 21866006), the Key Research and Development Program and the Natural Science Fund Program of Jiangxi Province (20161BBF60059; S2017ZRMSB0473).

Supplementary material

10967_2018_6381_MOESM1_ESM.docx (169 kb)
Supplementary material 1 (DOCX 168 kb)

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2019

Authors and Affiliations

  • Limin Zhou
    • 1
    • 2
  • Jinbo Ouyang
    • 1
  • Zhirong Liu
    • 1
  • Guolin Huang
    • 1
  • Yun Wang
    • 1
  • Zhao Li
    • 1
  • Adesoji A. Adesina
    • 2
  1. 1.State Key Laboratory for Nuclear Resources and EnvironmentEast China University of TechnologyNanchangPeople’s Republic of China
  2. 2.School of Chemical Sciences and EngineeringUniversity of New South WalesSydneyAustralia

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