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Authors: Li C, Pan J, Liu Y, Gao J, Yan Y, Chen J
Article Title: Adsorption behaviors of Sr(II) in aqueous solution by attapulgite and its surface ion-imprinted polymer.
Publication date: 2009
Journal: Journal of the Chinese Ceramic Society
Volume: 37
Issue: (10)
Page numbers: 1705-1711.
Alternative URL: http://en.cnki.com.cn/Article_en/CJFDTotal-GXYB200910024.htm
Abstract: Sr(II) ion-imprinting polymer was prepared by surface molecular imprinting technique and sol-gel process with Sr(II) as the template, chitosan as the functional monomer, attapulgite as the support, and glycidoxypropyltrimethoxysilane as the coupling agent. The attapulgite prepared ion-imprinting polymer and were characterized with scanning electron microscope and Fourier transmission infrared spectrometry, and then their adsorption mechanism was discussed. With the help of inductively coupled plasma-atomic emission spectrometry (ICP-AES), the factors affecting adsorption and selectivity, including pH, quiescent time, adsorbent amount, maximum capacity and selectivity coefficient were investigated. Under the optimum conditions, the ion-imprinted polymer has fast kinetics for the adsorption of Sr(II), and its maximum adsorption capacity is 3.71 times as that of attapulgite. Its selectivity is more than 3.0 times as that of attapulgite. A model for selective removal of target radioelements can be set up according to the results
Template and target information: Strontium ion, Sr(II)
Author keywords: adsorption, Attapulgite, selectivity, Strontium(II), Surface ion-imprinting
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