Selective Solid-Phase Extraction of Cd(II) Using Double Imprinting Strategy

Authors : Ebru BİRLİK ÖZKÜTÜK, Elif ÖZALP, Gülgün İŞLER, Sibel EMİR, Arzu ERSÖZ

Pages : 19-26

View : 16 | Download : 9

Publication Date : 2010-03-08

Article Type : Other Papers

Abstract :Molecular imprinting technology is a strategy for producing chemically selective binding sites, which recognize a particular molecule, in a macroporous polymer matrix. Molecular recognition-based separation techniques have received much attention in various fields because of their high selectivity for target molecules. In this study, we have used a molecular imprinting approach to achieve specific metal binding utilizing 3-aminopropyltrimethoxysilane insert ignore into journalissuearticles values(APTS); as a metal-complexing ligand. In the first step, APTS has complexed with Cdinsert ignore into journalissuearticles values(II); ions and then reacted with 3-mercaptopropyl-trimethoxysilane. Then, polymeric particles have crosslinked with tetraethoxysilane insert ignore into journalissuearticles values(TEOS);. The imprinted Cdinsert ignore into journalissuearticles values(II); ion has removed from the polymeric matrix by 0.1 M HNO 3 . Double- imprinted particles have characterized by Fourier Transform Infrared insert ignore into journalissuearticles values(FTIR);. Maximum binding capacity, optimum pH, and equilibrium binding time have found as 548 mg g-1, pH 6.0, and 45 min, respectively. In selectivity study, it has found that imprinting results in increased affinity of the material toward Cdinsert ignore into journalissuearticles values(II); ion over other competitor metal ions with the same charge. It was established that double-imprinted polymers can be used repeatedly without a considerable adsorption capacity loss. Key Words: Ion-imprintined polymer insert ignore into journalissuearticles values(IIP);, double-imprinting, Cdinsert ignore into journalissuearticles values(II); removal, solid phase extraction.   † This paper was presented at XIth National Spectroscopy Congress held in Ankara, Turkey, June 23-26, 2009.  
Keywords : Ion imprintined polymer IIP, double imprinting, Cd II, removal, solid phase extraction