biostudies-literatureAo JChinese Academy of SciencesNational Natural Science Foundation of China28588-28597https://www.ebi.ac.uk/biostudies/studies/S-EPMC9071111biostudies-literatureUnknown9(49)A novel uranium-imprinted adsorbent (AO-Imp fiber) was prepared by radiation-induced crosslinking of amidoxime-functionalized ultra-high molecular weight polyethylene fiber (AO fiber). The porous structure was characterized by scanning electron microscopy (SEM) and positron annihilation lifetime (PAL) spectroscopy after ion imprinting. This ion-imprinted fiber exhibited enhanced adsorption selectivity for uranium in the form of both UO₂ ^2- and [UO₂(CO₃)₃]^4- in batch experiments. Compared with AO fiber, the adsorption capacity of the AO-Imp(250) fiber for uranium increased from 0.36 mg g^-1 to 1.00 mg g^-1 in simulated seawater and from 5.02 mg g^-1 to 12.03 mg g^-1 in simulated acid efRSC advancesA novel ion-imprinted amidoxime-functionalized UHMWPE fiber based on radiation-induced crosslinking for selective adsorption of uranium.PMC9071111U1832124U1732151XDA02030000Xu LMa LAo JZhang HYe BMa HLi QZhang LXu XYao FfalseA novel ion-imprinted amidoxime-functionalized UHMWPE fiber based on radiation-induced crosslinking for selective adsorption of uranium.A novel uranium-imprinted adsorbent (AO-Imp fiber) was prepared by radiation-induced crosslinking of amidoxime-functionalized ultra-high molecular weight polyethylene fiber (AO fiber). The porous structure was characterized by scanning electron microscopy (SEM) and positron annihilation lifetime (PAL) spectroscopy after ion imprinting. This ion-imprinted fiber exhibited enhanced adsorption selectivity for uranium in the form of both UO₂ ^2- and [UO₂(CO₃)₃]^4- in batch experiments. Compared with AO fiber, the adsorption capacity of the AO-Imp(250) fiber for uranium increased from 0.36 mg g^-1 to 1.00 mg g^-1 in simulated seawater and from 5.02 mg g^-1 to 12.03 mg g^-1 in simulated acid ef2019-01-01T00:00:00Z2019 Sep2025-04-04T20:50:22.35Z2025-04-04T20:50:22.35ZS-EPMC90711113552961610.1039/c9ra05440e