摘要
通过静态吸附实验 ,研究了XAD 4,NDA 1 0 0和ND 90树脂对乙醇 水溶液中硫辛酸的吸附热力学及动力学特性 .结果表明 :硫辛酸在XAD 4树脂上是单层吸附 ,符合Lang muir等温吸附方程 ,吸附过程符合准一级动力学吸附方程 .在NDA 1 0 0和ND 90树脂上的吸附也符合Langmuir等温吸附方程 ,但并不只是单层吸附 ,同时兼有毛细管凝聚和微孔填充作用 ,吸附过程可分为大孔和中孔区吸附以及微孔区吸附两个阶段 。
Study on adsorption thermodynamics and kinetics of lipoic acid by XAD 4,NDA 100 and ND 90 resin was carried out through static experiments.The results showed that the adsorption of lipoic acid on XAD 4 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 fit well to the Langmuir isotherm,which is caused by the capillary condensation and the volume filling of micropores besides monolayer adsorption.The adsorption of lipoic acid on NDA 100 and ND 90 resin pass through two phases:macropores and mespores area and micropores region.And the adsorption rates of the two phases are the first order kinetics.
出处
《环境化学》
CAS
CSCD
北大核心
2004年第4期387-392,共6页
Environmental Chemistry
基金
国家自然科学基金项目 (项目编号 :2 0 2 740 1 7)
