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Bleaching with alternative layered minerals: A comparison with acid‐activated montmorillonite for bleaching soybean oil
Author(s) -
Taylor Dennis R.,
Jenkins Dennis B.,
Ungermann Charles B.
Publication year - 1989
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02653285
Subject(s) - montmorillonite , clay minerals , chemistry , chemical engineering , pulp and paper industry , mineralogy , organic chemistry , engineering
An extensive series of layered minerals including montmorillonite was studied to determine if the fundamental physicochemical properties responsible for pigment adsorption could be identified. Samples were subjected to a uniform preparation regimen to eliminate such secondary effects as particle size, moisture content, level of activation and degree of washing. By doing so, it has been possible to show that both carotene and chlorophyll adsorptions can be described by a rather simple model that employs both surface acidity and pore volume as key variables. Further, it was found that this model provides an adequate fit to the actual data only when specific regions for these variables are considered (i.e., concentration of sites of strong surface acidity, not just total surface acidity; pore volume in region 50\s‐200 Å, not just total pore volume).