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黄姜黄色素在大孔树脂上的吸附动力学研究
引用本文:李稳宏,唐璇,李新生,陈德经,韩枫,李冬,李学坤.黄姜黄色素在大孔树脂上的吸附动力学研究[J].离子交换与吸附,2008,24(6).
作者姓名:李稳宏  唐璇  李新生  陈德经  韩枫  李冬  李学坤
作者单位:1. 西北大学化工学院,西安,710069
2. 西安石油大学,西安,710065
3. 陕西理工学院/陕西省资源生物重点实验室,汉中,723000
基金项目:陕西省重点实验室访问学者专项基金资助项目 , 陕西省教育厅重大产业化项目  
摘    要:采用静态法考察了8种大孔吸附树脂对黄姜黄色素的吸附及解吸特性,筛选出LX-18G树脂具有较高的吸附选择性和良好的脱附性能.以LX-18G树脂对黄姜色素的吸附平衡和吸附动力学进行了深入探讨,测定了不同温度下黄姜色素在该树脂上的吸附等温线,以及不同温度,初始液浓度和转速下的吸附动力学曲线.结果表明,Langmuir方程可更好地描述黄姜色素在该树脂上的吸附平衡.吸附动力学规律可用二级速率方程表示,液膜扩散和颗粒内扩散分别是吸附初期和吸附后期的主要速率控制步骤,吸附活化能为5.37kJ/mol.

关 键 词:黄姜  黄色素  大孔吸附树脂  动力学

ADSORPTION KINETICS OF DIOSCOREA ZINGIBERENSIS YELLOW PIGMENT ON THE MACROPOROUS RESINS
LI Wenhong,TANG Xuan,LI Xinsheng,CHEN Dejing,LI Dong,HAN Feng,LI Xuekun.ADSORPTION KINETICS OF DIOSCOREA ZINGIBERENSIS YELLOW PIGMENT ON THE MACROPOROUS RESINS[J].Ion Exchange and Adsorption,2008,24(6).
Authors:LI Wenhong  TANG Xuan  LI Xinsheng  CHEN Dejing  LI Dong  HAN Feng  LI Xuekun
Institution:LI Wenhong1 TANG Xuan2 LI Xinsheng3 CHEN Dejing3 LI Dong1 HAN Feng1 LI Xuekun1 1. College of Chemical Engineering of Northwest University,Xi'an 710069,China 2. Xi'an Shiyou University,Xi'an 710065,China 3. Bioresources Key Laboratory of Shanxi Shanxi Technology University,Hanzhong 723000,China
Abstract:Eight types of macroporous resin were selected to conmpare their performances in adsorbing and desorbing yellow pigment extracted from Dioscorea zingiberensis. LX-18G macroporous adsorption resin in aqueous solution was investigated in batch experiments. The data obtained from kinetic and isotherm experiments could be well described using pseudo-second-order rate model and Langmuir isotherm model respectively, high temperature and concentrated solution were benefit to adsorption, the activation energy was 5.37kJ/mol. The adsorption process was controlled by film diffusion at earlier stages and by intra particle diffusion at later stages.
Keywords:Yellow pigment  Dioscorea zingiberensis  Macroporous sorption resin  Kinetics    
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