Retention of progesterone by four carbonaceous materials: study of the adsorption kinetics

被引:9
|
作者
Valenzuela-Calahorro, C [1 ]
Navarrete-Guijosa, A [1 ]
Stitou, M [1 ]
Cuerda-Correa, EM [1 ]
机构
[1] Univ Granada, Fac Farm, Dept Quim Inorgan, E-18071 Granada, Spain
关键词
adsorption; progesterone; kinetic model; carbon black;
D O I
10.1016/S0927-7757(03)00324-8
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The process by which progesterone in an ethanol solution is retained by four carbonaceous materials involves a reversible mechanism that conforms to a kinetic equation of unity partial order in both the progesterone concentration in solution, the coverage fraction (theta) of the adsorbing surface and (1 - theta). Over the temperature range 10-40 degreesC, the specific rate constant varies from 5.29 x 10(-4) to 44.85 x 10(-4) s(-1). The formation of the activated species involved in the adsorption process is an endothermal, exoentropic step. The rate of the adsorption-desorption process is primarily determined by diffusion of progesterone molecules in the pores of the sorbent. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:135 / 147
页数:13
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