کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
612168 | 880692 | 2007 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The synthesis of mesoporous aluminosilicate using microcline for adsorption of mercury(II) The synthesis of mesoporous aluminosilicate using microcline for adsorption of mercury(II)](/preview/png/612168.png)
An economical mesoporous aluminosilicate was synthesized with microcline as starting material and the precursor 13X zeolite as seed for crystal structure on mesoporous walls. In this method, a mixture of microcline and Na2CO3 with a molar ratio of 1:1.05 was first calcined at 1093 K for 2.5 h. The calcined materials were mixed with 35 ml C16TMABr aqueous solution (containing 8.2 g C16TMABr) and the precursors of 13X zeolite, resulting in mesoporous aluminosilicate after crystallization of the solution at 378 K for 48 h and calcination of the powder at 823 K for 5 h. The as-synthesized sample has a uniform pore diameter distribution centered at 3.7 nm. The as-synthesized sample had BET surface area of 725 m2/g and BJH mean pore diameter of 3.7 nm. The FT-IR results revealed that the building units of 13X zeolite were inserted into the pore walls of the as-synthesized sample. The adsorption ratio of mercury(II) onto the as-synthesized adsorbent was about 95%. The adsorption process was found to be spontaneous and can be explained by particle diffusion and chemical ion-exchange mechanisms. The equilibrium concentration of mercury(II) using the as-synthesized sample as the adsorbent was under 1 μg/L, making the concentration of mercury meet the limit for drinking water in China as recommended by the World Health Organization.
Mesoporous adsorbent (surface area: 725 m2/g; mean pore diameter: 3.7 nm) synthesized with microcline. Adsorption to of mercury(II) ions was spontaneous and can be explained with by particles diffusion and chemical ion-exchanged mechanisms.Figure optionsDownload as PowerPoint slide
Journal: Journal of Colloid and Interface Science - Volume 315, Issue 2, 15 November 2007, Pages 555–561