Kinetics of the effect of bleaching on the characterization, mineral nutrients and fat soluble vitamins of Blighia unijugata bak seed oil
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Date
2009-09
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University of Vigo, Faculty of Science
Abstract
THE EFFECT OF TEMPERATURE AND TIME ON THE BLEACHING OF THE OIL FROM BLIGHIA
UNIJUGATA BAK WAS STUDIED USING SURFACE ACTIVE CLAY. THE STUDY WAS CARRIED OUT
AT A TEMPERATURE RANGE OF 60-180°C OVER A PERIOD OF 0-90 MIN. THE ADSORPTION
OF PEROXIDES WAS ADEQUATELY MODELED BY ARRHENIUS TYPE EQUATION AND DESCRIBED
BY THE FIRST-ORDER KINETIC. THE ACTIVATION ENERGY FOR BLEACHING AT 120°C
AND 45 MIN WAS 136.604 CAL/MOLE FOR AL AND 47.245 CAL/MOLE FOR KL. THE
BLEACHING RESULTED IN AN IMPROVEMENT IN THE PHYSICO-CHEMICAL PROPERTIES OF
THE OIL AS WELL AS REMOVAL OF SOME TRACES OF TOXIC METALS.