Soy hull carbon as an adsorbent of minor crude soy oil components
A carbon adsorbent was prepared from soy hulls. The adsorbent was used in a laboratory study to examine its performance under commercial soy oil adsorption bleaching conditions. Phospholipids, peroxides, and free fatty acids were effectively removed from the soy oil with little effect on carotenoid content. There may be competitive adsorption between oil components, the rank of the affinity of oil components for soy carbon was phospholipid>peroxides>free fatty acid>lutein.
Key WordsAdsorption free fatty acid peroxides phospholipid lutein
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- 1.Brekke, O.L., Bleaching, inHandbook of Soybean Processing and Utilization, edited by D.R. Erickson, E.H. Pryde, O.L. Brekke, T.L. Mounts, and R.A. Falb, American Soybean Association and American Oil Chemist's Society, 1980, pp. 71–88.Google Scholar
- 4.Snyder, H.E., and T.W. Kwon, Processing of Soybeans, inSoybean Utilization, AVI, New York, 1987, p. 130.Google Scholar
- 5.James, E.M. The Refining and Bleaching of Vegetable Oils.J. Am. Oil Chem. Soc. 35:76–83 (1958).Google Scholar
- 6.Armstrong, M.R., and C.E. Ireland, The Bleaching of Soy Oil. A Spectrophotometric Detemrination. —Ibid. 35:425–428 (1958).Google Scholar
- 8.Toro-Vasquez, J.F.O.E., O. Garcia-L., and L.L. Guerro-E. Adsorption isotherms of Squash (Curcurbita moschata) Seed Oil on Activated Carbon, —Ibid. 68:596–599 (1991).Google Scholar
- 9.Proctor, A., and H.E. Snyder Adsorption of Lutein from Soybean Oil on Silicic Acid I. Isotherms, —Ibid., 64:1163–1166 (1987).Google Scholar
- 10.Official Methods and Recommended Practices of the American Oil Chemists' Society, Champaign, 1985, Method Cd 8b-90.Google Scholar
- 11.Bartlett, G.R. Phosphorus Assay in Column Chromatography,J. Biol. Chem., 234:446–468 (1959).Google Scholar
- 13.Leon y Leon D., C.A., and L.R. Radovic, Interfacial Chemistry and Electrochemistry of Carbon Surfaces, inChemistry and Physics of Carbon, Vol. 24, edited by P.A. Thrower, Marcel Dekker, 1994, pp. 213–310.Google Scholar