A novel preparation and vapor phase modification of 2D-open channel bioadsorbent for uranium separation

Mudasir Ahmad, Jianquan Ren, Tao Xiu, Mehraj ud din Naik, Qiuyu Zhang, Baoliang Zhang

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

An economical and highly uranium extraction from seawater remains a crucial task for energy sources and environmental safety. Aiming for improving the mass transfer rate of uranium from seawater, a new synthetic strategy was adopted to synthesize two-dimensional-open channel microporous bioadsorbent for uranium extraction from seawater. Herein, a vapor phase modification approach was adopted to graft divinylbenzene (DVB), and polyacrylonitrile (AN) onto the surfaces of microporous frameworks via a free radical polymerization method. The postsynthetic functionalization was carried out by hydrothermal process, where amidoxime groups are structure-directing agents to trap uranium. Furthermore, amidoxime groups not only enhanced hydrophilicity but also adjusts adsorbents pKa. AO-Fc faces minimum interference of competing ions and achieves a high uranium adsorption capacity of 8.57 ± 0.02 and 409 ± 1 mg/g in seawater and simulated solution. Despite its stable structure, AO-Fc exhibits a long life span and negligible weight loss revealed AO-Fc could be applied as a potential adsorbent for radionuclides.

Original languageEnglish
Article numbere17884
JournalAIChE Journal
Volume68
Issue number12
DOIs
StatePublished - Dec 2022

Keywords

  • 2D-open channel
  • microporous bioadsorbent
  • uranium
  • vapor-phase modification

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