The adsorption of model fatty acids (hepatnoic, oleic), using spiked vegetable oils, was studied using different kinds of zeolites (A‐zeolite, X, Y‐zeolites, mordenite), Y‐zeolite exchanged with different cations (alkali, alkaline earth, transition metal ions), and with bleaching clay/zeolite blends. The adsorption process was shown to be governed by the molecular sieving properties of the zeolites involved as well as the electrostatic field strengths of the exchange cations. Facile interparticle diffusion of cations between clay and zeolite particles in the blends was verified by electron microprobe analysis and shown to cause unexpected results with respect to bleaching and fatty acid removal.
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Taylor et al. (1984) studied this question.
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