球状壳聚糖树脂对茶多酚的吸附热力学和动力学研究

doi:10.13305/j.cnki.jts.2009.4.011

Abstract

Abstract: Resins of chitosan microspheres (RCM) were prepared by using reverse phase suspension cross-linked polymerization. Static sorption experiments were carried out to study the adsorption kinetics and thermodynamics of tea polyphenols on RCM. The results indicated that the adsorption followed the Langmuir isotherm .The Langmuir equilibrium constant K_b increased with increasing temperature. The adsorption was a non-spontaneous endothermic process of increased entropy by studying thermodynamics of adsorption. The adsorption followed second-order kinetic equation. The adsorption rate of tea polyphenols on RCM was controlled by the intraparticle diffusion during the adsorption process.

Key words: resins of chitosan microspheres, tea polyphenols, kinetics, thermodynamics

CLC Number:

TS272
Q503

LI Hai-yan, WANG Dsong-feng, Siaka. D, LIU Bing-jie, ZHANG Li. Thermodynamics and Kinetics of Tea Polyphenols Adsorption onto Resins of Chitosan Microspheres[J]. Journal of Tea Science, 2009, 29(4): 313-318.

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Thermodynamics and Kinetics of Tea Polyphenols Adsorption onto Resins of Chitosan Microspheres

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