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Adsorption of Gossypol from Cottonseed Oil on Oxides

โœ Scribed by Richard Kamga; G.Joseph Kayem; Paul G. Rouxhet

Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
115 KB
Volume
232
Category
Article
ISSN
0021-9797

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โœฆ Synopsis

The adsorption of gossypol, a toxic pigment and the major colorant in cottonseed oil, has been studied, using silicas and aluminas of different surface areas and pore size distributions. Gossypol has a high affinity for alumina surface, the adsorption isotherm follows the Langmuir equation, and the maximum amount adsorbed is compatible with a monolayer of molecules on the surface; this is indicative of chemisorption. The affinity for a silica surface is much lower and the adsorption isotherm follows the Freundlich equation. The amount adsorbed is also influenced by the pore size distribution, the useful surface area being that developed by pores larger than 3 nm, i.e., 2 to 3 times the size of the adsorbate. Copyright 2000 Academic Press.

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