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Reference type: Journal
Authors: Liu EL, Xu XC, Zheng XD, Zhang FS, Liu EX, Li CX
Article Title: An ion imprinted macroporous chitosan membrane for efficiently selective adsorption of dysprosium.
Publication date: 2017
Journal: Separation and Purification Technology
Volume: 189
Page numbers: 288-295.
DOI: 10.1016/j.seppur.2017.06.079
Alternative URL: http://www.sciencedirect.com/science/article/pii/S1383586617309462

Abstract: A novel Dy3+ ion-imprinted membrane material (II-MAC) with interconnected 3D macroporous structure was firstly prepared by a simple immersion-precipitation-evaporation method for the selective solid-liquid extraction of Dy3+. The morphology and chemical structure of II-MAC were characterized using multiple physicochemical techniques, such as SEM, nitrogen adsorption/desorption, FTIR, and element analysis. Adsorption experiments shown that the maximum adsorption capacity of II-MAC to Dy3+ was 23.3 mg g-1 in the optimal pH (7.0) at 25 C, and the value of imprint factor at pH = 7.0 was the highest. The distribution coefficient for Dy3+ in the presence of the competitive rare earth metal ions was 494.88 mL g-1, which was remarkably higher than that of other ions. Moreover, II-MAC could be easily retrieved due to the membrane structure, which could tactfully avoid the complex centrifugation and greatly decrease the operation time. The reusability tests demonstrated that II-MAC could be repeatedly used without significant loss even after the fifth runs. This work not only provides a more straightforward and high-efficiency means in selective extraction of Dy3+, but also promotes the development of green and sustainable material
Template and target information: dysprosium ion, Dy(III)
Author keywords: chitosan, Dy, Ion-imprinting, 3D macroporous membrane, selective adsorption


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