A novel preparation and vapor phase modification of 2D-open channel bioadsorbent for uranium separation.
writer：Ahmad Mudasir, Ren Jianquan, Xiu Tao, Naik Mehraj-ud-din, Zhang Qiuyu, Zhang Baoliang*
keywords：2D-open channel, microporous bioadsorbent, uranium, vapor-phase mo
source：期刊
specific source：AIChE JOURNAL
Issue time：2022年
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.