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Reference type: Journal
Authors: Ao JX, Zhang HJ, Xu X, Yao FJ, Ma L, Zhang L, Ye BJ, Li QN, Xu L, Ma HJ
Article Title: A novel ion-imprinted amidoxime-functionalized UHMWPE fiber based on radiation-induced crosslinking for selective adsorption of uranium.
Publication date: 2019
Journal: RSC Advances
Volume: 9
Issue: (49)
Page numbers: 28588-28597.
DOI: 10.1039/C9RA05440E

Abstract: 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 UO22- 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 effluent, while its adsorption capacities for other co-existing metal ions were particularly low. This study provides an approach to prepare ion-imprinted adsorbents without introducing crosslinking reagents, which may be a promising method for uranium extraction
Template and target information: uranyl ion


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