MIPs logo MIPdatabase      MIP2024 Conference banner, website is now open, register on site for important updates   
Custom Search
Reference type: Journal
Authors: Gao BJ, Zhang YQ, Xu Y
Article Title: Study on recognition and separation of rare earth ions at picometre scale by using efficient ion-surface imprinted polymer materials.
Publication date: 2014
Journal: Hydrometallurgy
Volume: 150
Page numbers: 83-91.
DOI: 10.1016/j.hydromet.2014.09.017
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0304386X14002138

Abstract: The graft-polymerization of hydroxyethyl methylacrylate (HEMA) on micro-sized silica gel particles was first conducted by initiating of a surface-initiating system, which was constituted by the bonded amino groups on the modified silica gel particles and persulfate in the solution, obtaining the grafted particles PHEMA/SiO2 with a high grafting degree of 40 g/100 g. Subsequently, 8-hydroxyquinoline as a ligand with strong chelating ability for metal ions was bonded on the side chains of the grafted macromolecule PHEMA through the substitution reaction between 5-chloromethyl-8-hydroxyquinoline (CHQ) and the hydroxyl group of the grafted macromolecule PHEMA, preparing the functional grafted particles HQ-PHEMA/SiO2. On the basis of examining the chelating adsorption property of HQ-PHEMA/SiO2 particles for Pr3 + ion, the Pr3 + ion surface-imprinting was carried out by using the effective surface-imprinting technique of "pre-grafting and post-crosslinking/imprinting" established by our group. During the surface-imprinting process, Pr3 + ion was used as a template ion, and 2,2'-dichlorodiethyl ether was used crosslinked, resulting in the Pr3 + ion surface-imprinted material IIP-HQP/SiO2. The recognition and binding characters of IIP-HQP/SiO2 towards Pr3 + ion were investigated in-depth with La3 + and Ce3 + ions as two contrast ions. The experimental results show that the IIP-HQP/SiO2 particles possess special recognition selectivity and high binding ability for Pr3 + ion. The binding capacity of IIP-HQP/SiO2 for Pr3 + ion reaches 0.13 mmol/g, and relative to La3 + and Ce3 + ions, the selectivity coefficients of IIP-HQP/SiO2 for Pr3 + ion are 5.22 and 5.12, respectively. La, Ce and Pr are three neighbouring rare earth elements, and the ion radius differences between La3 +, Ce3 + and Pr3 + ions are only in a range of 2-5 pm. Obviously, in this investigation, the mutual separation of La3 +, Ce3 + and Pr3 + ions at picometre scale is realized successfully by using the ion surface-imprinted polymer material with high performance
Template and target information: rare earth metals, Pr(III), praseodymium ion
Author keywords: Ion surface imprinting technique, rare earth ion, ion recognition, separation


  Eat, sleep, imprint, repeat shirt  SMI logo mug  Man of proper-tea mug in blue






 

Join the Society for Molecular Imprinting
Logo of the Society for Molecular Imprinting

New items RSS feed
new items RSS feed  View latest updates

Sign-up for e-mail updates:
Choose between receiving an occasional newsletter or more frequent e-mail alerts.
Click here to go to the sign-up page.


Is your name elemental or peptidic? Enter your name and find out by clicking either of the buttons below!
Other products you may like:
view listings for MIP books on eBay:



Mickey Mouse 90th Anniversary banner