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Stereoscopic porous gellan gum-based microspheres as high performance adsorbents for U(VI) removal

  • Lili Liang
  • Xiaoyan Lin
  • Siyao Sun
  • Yan Chen
  • Ran Shang
  • Xuegang Luo
Article
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Abstract

Stereoscopic porous microspheres based gellan gum (GG–Ca) were successfully prepared by sol–gel method using ethyl acetate as porogen and glutaraldehyde as crosslinker. The obtained GG–Ca microspheres were mainly of mesoporous with the average pore diameter was about 4 nm. It displayed a higher ability for uranium removal. In addition, the uranium adsorption process was endothermic and spontaneous following a pseudo-second-order and the adsorption isotherm was the best fit with the Freundlich model with maximum uranium capacity of 202.26 mg g−1. The UO2+ adsorption mechanism is ion-exchange with Ca2+ based on SEM, EDX and XPS data analysis.

Keywords

Gellan gum Stereoscopic netlike Biosorption Uranium Ethyl acetate 

Notes

Acknowledgements

This research was financially supported by the Science and Technology Support Plan of Qinghai Province (2015-SF-119) and Longshan Academic talent Research Support Plan of Southwest University of Science and Technology (17LZX302). The authors gratefully acknowledged the technology support of Engineering Research Center for Biomass Materials, Ministry of Education, Southwest University of Science and Technology.

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Copyright information

© Akadémiai Kiadó, Budapest, Hungary 2018

Authors and Affiliations

  • Lili Liang
    • 1
    • 2
    • 3
  • Xiaoyan Lin
    • 1
    • 2
  • Siyao Sun
    • 1
    • 2
  • Yan Chen
    • 1
    • 2
  • Ran Shang
    • 4
  • Xuegang Luo
    • 1
    • 2
  1. 1.School of Materials Science and EngineeringSouthwest University of Science and TechnologyMianyangChina
  2. 2.Engineering Research Center of Biomass MaterialsMinistry of EducationMianyangChina
  3. 3.Sichuan Preschool Educators CollegeJiangyouChina
  4. 4.State Key Laboratory of NBC Protection for CivilianBeijingChina

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