黄姜黄色素在大孔树脂上的吸附动力学研究  

ADSORPTION KINETICS OF DIOSCOREA ZINGIBERENSIS YELLOW PIGMENT ON THE MACROPOROUS RESINS

作　　者：李稳宏[1] 唐璇[2] 李新生[3] 陈德经[3] 韩枫[1] 李冬[1] 李学坤 

机构地区：[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

出　　处：《离子交换与吸附》2008年第6期526-534,共9页Ion Exchange and Adsorption

基　　金：陕西省重点实验室访问学者专项基金资助项目(07JZF06);陕西省教育厅重大产业化项目(04JC03)

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。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.

关 键 词：黄姜 黄色素 大孔吸附树脂 动力学 

分 类 号：O647.3[理学—物理化学]