کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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625892 | 1455440 | 2010 | 7 صفحه PDF | دانلود رایگان |
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 35.91 mg g− 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.
Journal: Desalination - Volume 251, Issues 1–3, February 2010, Pages 83–89