大孔树脂对倍花单宁酸的吸附特性及其动力学模型  

A Kinetic Model for Adsorption Characteristics of Tannic Acid from Chinese Gall “Beihua” on Macroporous Resin

作　　者：欧阳玉祝[1] 张辞海[1] 魏燕[1] 

机构地区：[1]吉首大学食品科学研究所,湖南吉首416000

出　　处：《食品科学》2013年第11期122-125,共4页Food Science

基　　金：湖南省科技厅科技计划项目(2008FJ3077)

摘　　要：通过静态吸附实验,研究D-101大孔吸附树脂对倍花单宁酸的吸附行为。分别采用准一级动力学方程、准二级动力学方程和颗粒扩散动力学模型探讨其吸附特性;根据Van’t Hoff方程,研究吸附热力学参数。结果表明:吸附过程符合准二级动力学方程,颗粒扩散与边界层扩散交互影响单宁酸在D-101树脂上的吸附。树脂对单宁酸的吸附符合Langmuir等温吸附方程,是物理吸附过程,体系放热5.5kJ/mol。The adsorption behavior of tanmc acid from Chinese gall ＂Beihaua＂ on 19-101 macroporous polymenc resin was studied using static adsorption experiments. Some adsorption characteristics was investigated based on the pseudo-first-order, pseudo-second-order and particle diffusion kinetics model, and thermodynamic parameters for the adsorption of tannic acid were determined using the Van＇t Hoff equation. The results showed that the adsorption process followed a pseudo-second-order kinetic equation. The mutual effects of boundary layer diffusion and intraparticle diffusion on the adsorption of tannic acid on D-101 resin were determined. Langmuir isothermal adsorption equation was successfully employed to describe the adsorption of tannic acid on the macroporous resin. This process was physical adsorption with adsorption enthalpy of 5.5 k J/mol.

关 键 词：倍花 单宁酸 大孔树脂 动力学 热力学 

分 类 号：TS202.3[轻工技术与工程—食品科学] TS201.2[轻工技术与工程—食品科学与工程]