Production of metal ion imprinted polymer from mercapto–silica through sol–gel process as selective adsorbent of cadmium

A Cd(II) imprinted mercapto-functionalized silica gel sorbent was synthesized via a surface imprinting technique for selective adsorbent of Cd(II) ion in aqueous. The adsorbent was characterized using infrared (IR) spectroscopy, scanning electron microscopy (SEM), and energy dispersive x-ray (EDX) s...

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Bibliographic Details
Published in:Desalination 2010-02, Vol.251 (1-3), p.83-89
Main Authors: Buhani, Narsito, Nuryono, Kunarti, Eko Sri
Format: Article
Language:English
Subjects:
Adsorbent
Adsorbents
Adsorption
Applied sciences
Exact sciences and technology
Imprinted polymers
Ionic imprinting
Mercapto–silica
Pollution
Scanning electron microscopy
Selectivity
Sol-gel processes
Sorbents
Spectroscopy
Surface chemistry
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Summary:A Cd(II) imprinted mercapto-functionalized silica gel sorbent was synthesized via a surface imprinting technique for selective adsorbent of Cd(II) ion in aqueous. The adsorbent was characterized using infrared (IR) spectroscopy, scanning electron microscopy (SEM), and energy dispersive x-ray (EDX) spectroscopy. The adsorbent of Cd(II) ion-imprinted ionic polymer (Cd(II)-IIP) has higher capacity and selectivity than the non imprinted polymer (NIP) adsorbent. Adsorption capacity of Cd(II)-IIP and NIP are 83.89 and 35.91mgg−1 respectively. The largest selectivity coefficients (α) of the Cd(II)-IIP sorbent for Cd(II) in the presence of Ni(II), Cu(II) and Zn(II) are 99.798, 93.045, and 86.617 respectively. The relative selective factor (αr) values of Cd(II)/Ni(II), Cd(II)/Cu(II) and Cd(II)/Zn(II) are 41.687, 65.617 and 66.937, which are greater than 1. The prepared imprinted ionic sorbents exhibit high reusability. The results suggest that these Cd(II)-IIP can be used several times without considerable loss of adsorption capacity.
ISSN:0011-9164
1873-4464
DOI:10.1016/j.desal.2009.09.139