摘要
本文主要研究了PA、H103及XAD-4树脂在茶多酚吸附分离体系中的吸附热力学特性及吸附动力学特性。热力学研究表明,三种吸附剂的吸附等温线都属于优惠型的吸附等温线,并可以用Langmiur 方程来描述,且与Langmiur方程高度相关;动力学特性研究表明,PA和H103树脂为中速吸附型的吸附剂,XAD-4为慢速吸附型的吸附剂。PA、H103及XAD-4树脂的吸附平衡速率常数依次为KPA=1.461h-1,KH103=1.198h-1,KXAD-4=0.498h-1。
The thermodynamic and kinetic characteristics of three adsorbents, PA, H103 and XAD-4 were systematicallyinvestigated during their adsorption on Tea Polyphenols (TP). The thermodynamics showed that the adsorption isotherms ofthese three adsorbents all belonged to the preferential isotherm and could be described by the Langmiur equation. The kineticsindicated that PA and H103 were intermediate speed adsorbents, while XAD-4 is low speed adsorbent during their applicationson TP. The equilibrium constants of PA, H103 and XAD-4 were KPA=1.461h-1,KH103=1.198h-1,KXAD-4=0.498h-1 respectively.
出处
《食品科学》
EI
CAS
CSCD
北大核心
2003年第12期40-43,共4页
Food Science
基金
教育部骨干教师资助计划项目(教计司[2000-6])
