文章基本信息

标题：Adsorption of some essential amino acids and their mixture onto poorly crystalline hydroxyapatite
本地全文：下载
作者：El Rhilassi A. ; Mourabet M. ; El Boujaady H. 等
期刊名称：Journal of Materials and Environmental Science
印刷版ISSN：2028-2508
出版年度：2014
卷号：5
期号：5
页码：1442-1453
出版社：University of Mohammed Premier Oujda
摘要：The adsorption of L-Lysine, DL-Leucine, two essential amino acids, and their equimo lar mixture onto poorly crystalline hydroxyapatite, obtained b y p recipitation, is studied. The adsorption kinetics is relatively fast. Isotherms were established, they are of Freundlich and Langmuir type. The affinity constant is more important for the L-lysine than for the DL-leucine. The amount of adsorbate adsorbed decreases with the increase of ratio Ra (mg/ml). The calcium ions increase the adsorption, while phosphate ions inhibit it. The lateral load of the amino acid can modify the adsorption characteristics. The thermodynamic study shows that the adsorption is a spontaneous and exothermic process. The interactions adsorbate- adsorbent are electrostatic type.
关键词：Adsorption; L;lysine; DL;leucine; Hydroxyapatite