Surface areas of kaolin, α-Fe2O3 and hydroxy-Al montmorillonite |
| |
Authors: | A K Helmy E A Ferreiro S G de Bussetti N Peinemann |
| |
Institution: | (1) Universidad Nacional del Sur 8000 Bahiá Blanca República Argentina E-mail: akhelmi@criba.edu.ar, AR |
| |
Abstract: | Adsorption of eight organic molecules on kaolin, α-Fe2O3 and hydroxy-Al montmorillonite was studied to examine the effect of sorbate area on the values of the surface area of these
materials. For each sorbent, the number of molecules at monolayer coverage per gram produced a single hyperbola when plotted
as a function of the area occupied by an adsorbate. The equations of the hyperbolas are: NA=22.23 A
0.098 for the kaolin, NA=53.70 A
-0.399 for α-Fe2O3 and NA=161.81 A
0.322 for the hydroxy-Al montmorillonite. These equations give accessible surface areas and not the true surface areas of the solids
studied, which remain elusive.
Received: 13 November 1997 Accepted: 24 January 1998 |
| |
Keywords: | Evaluation of surface areas kaolin hematite hydroxy-Al montmorillonite |
本文献已被 SpringerLink 等数据库收录! |