硫辛酸在3种不同树脂上的吸附热力学和动力学研究  

STUDIES OF THE ADSORPTION THERMODYNAMICS AND KINETICS OF LIPOIC ACID ON THREE TYPES OF RESIN

作　　者：魏瑞霞[1] 陈金龙[2] 

机构地区：[1]河北理工大学资源与环境学院,唐山063009 [2]南京大学环境工程系,南京210093

出　　处：《离子交换与吸附》2010年第4期300-309,共10页Ion Exchange and Adsorption

基　　金：国家自然科学基金(20274017)

摘　　要：研究了硫辛酸在3种不同树脂上的吸附热力学和动力学。研究结果表明,硫辛酸在NG-16树脂上的吸附等温线符合Langmuir等温吸附方程,是单分子层吸附,吸附过程符合一级动力学吸附方程。硫辛酸在NDA-100和ND-90树脂上的吸附等温线符合Langmuir等温吸附方程,但并不只是单分子层吸附,对于中高浓度(大于400mg/L)的硫辛酸溶液更重要的是微孔填充作用。硫辛酸在NDA-100和ND-90树脂上的吸附过程分为大孔、中孔区的表面吸附和微孔区的微孔填充两个阶段,两个阶段都符合一级动力学吸附方程。Study on adsorption thermodynamics and kinetics of Lipoic acid by NG-16,NDA-100 and ND-90 resin was carried out through static experiments.The results showed that the adsorption of Lipoic acid on NG-16 resin is Langmuir monolayer,and the adsorption rate appears to be the first order kinetics.The adsorption data of Lipoic acid on NDA-100 and ND-90 resin also were described well by the Langmuir isotherm,which is caused by the capillary condensation and the volume filling of micropores besides monolayer adsorption.When the concentration of Lipoic acid was higher than 400mg/L,the capillary condensation and the volume filling of micropores acted the main part.The adsorption of Lipoic acid on NDA-100 and ND-90 resin passed through two phases：macropores,mespores area and micropores area.And the adsorption in micropores area was described well by the Dubinin-Radushkevich isotherm.The adsorption rates of the two phases were the first order kinetics.

关 键 词：硫辛酸 吸附 树脂 热力学 动力学 

分 类 号：O647.3[理学—物理化学]