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Reference type: Journal
Authors: Liu YH, Cao XH, Hua R, Wang YQ, Liu YT, Pang C, Wang Y
Article Title: Selective adsorption of uranyl ion on ion-imprinted chitosan/PVA cross-linked hydrogel.
Publication date: 2010
Journal: Hydrometallurgy
Volume: 104
Issue: (2)
Page numbers: 150-155.
DOI: 10.1016/j.hydromet.2010.05.009
Alternative URL: http://www.sciencedirect.com/science/article/B6VBT-506RN5P-2/2/21d9b85ba5d0156a8b639a953f78a161

Abstract: An interpenetration network (IPN) ion-imprinting hydrogel (IIH) was synthesized using uranyl ions as template for adsorption and removal of uranyl ions from aqueous solutions. The IIH was obtained via cross-linking of blended chitosan/polyvinyl alcohol (PVA) using ethylene glycol diglycidyl ether (EGDE). The ability of the IIH to adsorb and remove uranyl ions from aqueous solutions was assessed using a batch adsorption technique. The maximum adsorption capacity was observed in the pH range of 5.0-6.0. The adsorption process could be well described by both the Langmuir and Freundlich isotherms and the maximum adsorption capacity calculated from Langmuir equation was 156 mg/g. Equilibrium was achieved within 2 h. The kinetic data, obtained at optimum pH 5.0 could be fitted with to a pseudo-second order equation. The selectivity coefficient of uranyl ion and other metal cations on IIH indicated an overall preference for uranyl ions which was much higher compared with the non-imprinted hydrogel. This suggests that the IIH is a promising sorbent material for the selective removal of uranyl ions from aqueous solutions
Template and target information: uranyl ion
Author keywords: Uranyl ions, adsorption isotherms, Ion-imprinted hydrogel, chitosan


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