ABSTRACT
Lipids are a large family of generally hydrophobic substances that include oils, fats, phospholipids, and steroids, to name a few. A vast amount of research on the nature and action of clays, carbons, and synthetic silicas in the purification of lipids has been completed since the 1980s. The contribution of activated carbon to the edible oil industry involves decolorization and deodorization in either the refining or rejuvenation stage of oil production. Additionally, the hydrogenation process employs a carbon as a catalyst carrier. The adsorption of cottonseed oil pigments by activated carbon during refining was more efficient when gossypol was adsorbed first by adding bleaching clay. The effects of filtration bleaching on peroxide value, thiobarbituric acid value and carbonyl value of autoxidized soybean oil were investigated by using twenty-three kinds of activated carbon in order to improve oil quality. Groundnut oil has been decolorized by activated carbon from coconut shells.
