Studies on the Adsorption Process of Phosphatidylethanolamine in Egg Yolk Adsorbed onto Alumina

Abstract:

Phospholipids have been widely used in the food and pharmaceutical industries. The adsorption is generally employed to separate and purify phospholipids. The static adsorption of phosphatidyl ethanolamine in egg yolk onto alumina was investigated and the kinetics and thermodynamics of the adsorption were studied using the high performance liquid chromatography. The fit model of the adsorption in phospholipids/methanol solution was the second-order kinetic model, where the internal diffusion was the key control of the adsorption but not the only one. The isothermal adsorption can be well explained using Langmuir Adsorption Isotherm. The adsorption process was a spontaneous exothermic process resulted from the increase in the systems entropy.