Surface area evaluation of montmorillonite
- Univ. Nacional del Sur, Bahia Blanca (Argentina)
Adsorption of molecules of different sizes on montmorillonite and on hydroxy-Al montmorillonite was studied to examine the effect of sorbate size on the experimental value of the surface area of the clays. For each clay the number of adsorbate units at the adsorption maximum per gram of clay produces a single hyperbolic curve, when plotted as a function of the area occupied by adsorbate, in the range of areas of 22--180 {angstrom}{sup 2} per sorbate. The equations of the curves are: N A = 657.7 m{sup 2}/g for the clay and N A = 202.8 {angstrom}{sup 27} for the hydroxy-Al montmorillonite. A dependence of the surface area of the hydroxy-Al montmorillonite on adsorbate size was observed and was attributed to surface irregularities produced by hydroxy-Al interlayering.
- OSTI ID:
- 316352
- Journal Information:
- Journal of Colloid and Interface Science, Journal Name: Journal of Colloid and Interface Science Journal Issue: 1 Vol. 210; ISSN 0021-9797; ISSN JCISA5
- Country of Publication:
- United States
- Language:
- English
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