Mechanism of Isoflavone Adsorption from Okara Extracts onto Food-Grade Resins

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• 作者：David M茅ndez Sevillano ; Lena Jankowiak ; Thomas L. T. van Gaalen ; Luuk A. M. van der Wielen ; Nasim Hooshyar ; Atze-Jan van der Goot ; Marcel Ottens
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：October 1, 2014
• 年：2014
• 卷：53
• 期：39
• 页码：15245-15252
• 全文大小：504K
• ISSN：1520-5045

文摘

Okara is a byproduct of the soy milk industry containing valuable phytochemicals, called isoflavones, among other components (i.e., proteins, sugars, fibers, etc.). As a waste product, okara is an interesting source material for obtaining valuable chemicals, and knowledge of the behavior of such components in their complex matrix is a key step for design of a purification process. Six commercially available macroporous polymeric resins are investigated to measure and model the equilibrium properties of the adsorption of isoflavones, proteins, and total solids onto these resins. A new model is evaluated in which adsorption of isoflavones onto a protein layer is proposed describing the system isoflavones鈥搑esin XAD 4 better than a linear isotherm model. Parameters for both the linear model and the bilayer model are regressed and reported with their accuracy and correlated to the hydrophobicity of each of the isoflavones.