To Evaluate an Acid Activated Bentonite from Khorasan (Iran) for Use as Bleaching Clay

The present investigation involves the preparation, characterization and bleaching property evaluation of a set of adsorbents, prepared by the acid activation of a bentonite clay collected from khorasan region, iran. the acid activation experiments were carried out by hydrochloric acid solutions of variousconcentrations in the range of 2- 7 n at 80±2 °c for 2 hours. surface area measurements, chemical composition and mineralogical analysis of the prepared samples were performed. activated samples were tested in order to verify their capacity to bleach colza-soybean oil, and their performances were compared to that of a commercial bleaching clay. the results showed that the activated bentonite at - 5 n acid concentration, would attain desirable adsorption properties suitable for bleaching ofedible oils.