Adsorption Kinetics and Thermodynamics of Phenylethanoid Glycosides from Callicarpa Nudiflora by Macroporous Resins
The kinetics and thermodynamics for the adsorption of phenylethanoid glycosides(PhGs)from Callicarpa nudiflora(C.nudiflora)by different types of macroporous resins were investigated,and thereby guiding the separation and purification of such compounds.With adsorption and desorption ratio as indexes,optimal macroporous resins for purification of PhGs were selected from six categories by estimating the static adsorption and desorption features.This also allows for establishment of adsorption kinetics and adsorption isotherm models for PhGs to investigate their adsorption processes.According to the preliminary screening results,resins SP-825,SP-207,and X-5 were utilized for further investigation,and they exhibited comparable adsorption processes for PhGs.The three resins showed the fast adsorption,slow adsorption and equilibrium adsorption stages during the periods of 0～60 min,60～360 min,and after 360 min,respectively.Adsorption dynamics was well simulated by quasi-second-order equation for three macroporous resins,and adsorption rate was simultaneously controlled by liquid film diffusion and intraparticle diffusion.Equilibrium adsorption data were well fitted by Langmuir and Freundlich isotherm equations.PhGs were efficiently adsorbed by the three kinds of resins with favorable adsorption characteristics.The adsorption process of PhGs from C.nudiflora by the three types of macroporous resins can be fitted by both kinetic and thermodynamic models.Experimental results demonstrate that the domestic resin X-5 can be used to replace the imported resin SP-825 or SP-207 for the separation and purification study of C.nudiflora with good purification performance.
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万方数据
维普
