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《Journal of Chemical Industry and Engineering(China)》 2005-07
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Thermodynamic study of adsorption of catechin on ion exchange fiber

LI Mingyu, ZENG Qingxuan, FENG Changgen, SUN Weina (State Key Laboratory for Prevention and Control of Explosive Disasters, Beijing Institute of Technology,Beijing 100081,China)  
The adsorption of catechin by using self-made ion exchange fiber(IEF) adsorbent was studied. Equilibrium data for the adsorption of catechin from aqueous solutions by IEF adsorbent within the temperature range of 286—328 K and observed concentration range were obtained and correlated with the Langmuir-type and Freundlich-type isotherm equations. Freundlich adsorption isotherms and isosteric enthalpy of the adsorption of catechin indicated that the process of adsorption of catechin from aqueous solutions by IEF was an endothermic process. Estimations of the isosteric enthalpy of adsorption, free energy, and entropy of adsorption were reported, and the adsorption behavior was reasonably interpreted.
【Fund】: 国家高技术研究发展计划项目(2002AA245091).~~
【CateGory Index】: O647.3
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