摘要
目的研究大孔吸附树脂吸附远志总皂苷这一过程的吸附热力学和吸附动力学特征。方法以香草醛-冰醋酸-高氯酸为显色剂,采用可见光分光光度法测定了不同温度时的吸附等温线和不同起始浓度下的吸附动力学曲线。结果吸附平衡数据符合Freund lich方程、Lagergren一级速率方程和Dumwald-W agner颗粒内扩散方程,相关性均良好。结论该吸附过程为吸热过程,自发进行,高温有利于吸附,吸附速率主要由颗粒内扩散控制。
Objective To study the adsorptive thermodynamics and dynamics of adsorption of total saponin in Radix Polygalae onto macroporous resin. Methods Vanillin, glacial acetic acid and perchloric acid were used as chromogenic agent and visible spectrophotometry was used to detect the adsorptive equilibrium curve at different temperatures and adsorptive dynamic curve under the different beginning concentrations. Results The adsorptive balance data were correlated well to Freundlich equation, Lagergren equation and Dumwald-Wagner intraparticle diffusion equation. The relativities among them were all good. Conclusion This adsorptive procedure was a spontaneous endothermic procedure. A higher temperature is advantageous to the adsorption. The rate of adsorption is mainly controlled by the intraparticle diffusion.
出处
《北京中医药大学学报》
CAS
CSCD
北大核心
2006年第11期772-775,共4页
Journal of Beijing University of Traditional Chinese Medicine
关键词
大孔吸附树脂
远志总皂苷
吸附热力学
吸附动力学
macroporous resin
total saponin in Radix Polygalae
adsorptive thermodynamics
adsorptive dynamics
