학술논문
Sunflower oil bleaching by adsorption onto acid-activated bentonite
Document Type
article
Author
Source
Brazilian Journal of Chemical Engineering. March 2011 28(1)
Subject
Language
English
ISSN
0104-6632
Abstract
Two bentonite clays with different mineralogical compositions from Mendoza, Argentine, were activated with H2SO4 solutions of 4 and 8 N at 90ºC for 3.5 hours. This treatment affected clay structural properties, as was shown by thermogravimetry, infrared spectrometry and chemical analysis. Bleaching efficiency for sunflower oil was strongly dependent on the acid concentration used for clay activation. The samples have bleaching capacity comparable to that observed with a commercial adsorbent standard. The mineralogical composition of natural clays influenced the properties of the activated clays.