Surface properties of an activated bentonite. Decolorisation of rape-seed oils

被引：0
|
作者：
Srasra, E. [1 ]
Bergaya, F. [1 ]
Van Damme, H. [1 ]
Ariguib, N.K. [1 ]
机构：
[1] Cent de Chimie Appliquee, Tunisia
来源：
Applied Clay Science | 1989年 / 4卷 / 5-6期
关键词：
Clay Minerals--Activation - Pigments--Adsorption - Vegetable Oils--Bleaching;
D O I：
10.1016/0169-1317(89)90019-7
中图分类号：
学科分类号：
摘要：
The decolorisation of rape-seed oils by a recently discovered Tunisian bentonite was tested. It is proved that this clay has a valuable high decolorizing power after appropriate activation by acids. We have tried to relate the adsorption of a model colored molecule (β-carotene) with the modified surface properties of the activated clay. The results of this study show that only a few strong acidic sites due to activation are responsible for the partial removal of the pigments coloring the oils.
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页码：411 / 421
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