大孔吸附树脂对杜仲叶总黄酮的吸附热力学和动力学研究  

ADSORPTION KINETICS AND THERMODYNAMICS OF FLAVONOIDS IN THE LEAVES OF EUCOMMIA ULMOIDES OLIV. WITH MACROPOROUS ADSORPTION RESINS

作　　者：熊利芝[1,2] 王溶[2] 田伟[2] 何则强[2] 

机构地区：[1]吉首大学植物资源保护与利用湖南省高校重点实验室,吉首416000 [2]吉首大学生物资源与环境科学学院,吉首416000

出　　处：《离子交换与吸附》2013年第6期526-534,共9页Ion Exchange and Adsorption

基　　金：国家自然科学基金项目(No.51262008;No.51202087;No.51364009);湖南省自然科学基金重点项目(No.12JJ2005);湖南省科技厅工业支撑计划重点项目(No.2012GK2017);湖南省教育厅重点项目(No.12A109);湖南省高校创新平台开放基金项目(No.13K094);湖南省高校产业化培育项目(No.12CY014);返校博士科研资助经费研究项目(No.jsdxxcfxbskyxm201111);植物资源保护与利用湖南省高校重点实验室开放基金(No.JSK201116);湖南省重点学科建设项目

摘　　要：通过静态吸附实验,研究大孔吸附树脂对杜仲叶总黄酮的吸附热力学和动力学。结果表明:DM-301大孔吸附树脂具有较大的吸附量、较强的解吸能力。DM-301大孔吸附树脂对杜仲叶总黄酮的吸附符合Freundlich等温吸附方程;热力学研究发现ΔH<0、ΔG<0、ΔS>0,表明杜仲叶总黄酮在DM-301大孔吸附树脂的吸附属于可自发进行的物理吸附,吸附过程为放热、熵增过程。吸附动力学研究的结果表明:二级动力学方程的计算值与实验值吻合较好,适合描述DM-301大孔吸附树脂对杜仲叶总黄酮的吸附过程。The adsorption kinetics and thermodynamics of flavonoids in the leaves of Eucommia ulmoides Oliv. with 5 kinds of macroporous adsorption resins were studied by static adsorption experiments. The results showed that DM-301 had the best adsorption and desorption performance. The adsorption equilibrium data were agreed with Freundlich adsorption isotherm well. Thermodynamic analysis suggested △H〈0, △G〈0 and △S〉0. The adsorption of flavonoids on DM-301 was a spontaneous physical adsorption process, the adsorption procedure was an exothermic and entropy increase reaction. The adsorption process of flavonoids in the leaves of Eucommia ulmoides Oliv. on macroporous resin DM-301 could be described well by second-order kinetic equation.

关 键 词：大孔吸附树脂 总黄酮 热力学 动力学 杜仲 

分 类 号：R284.2[医药卫生—中药学]