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[1]刘 哲1,2,张越非1,等.HPD—100大孔树脂吸附葛根异黄酮的热力学和动力学[J].武汉工程大学学报,2015,37(04):17-22.[doi:10. 3969/j. issn. 1674—2869. 2015. 04. 004]
 ,,et al.Adsorption kinetics and thermodynamics of Pueraia isoflavonoids on HPD-100 macroporous resin[J].Journal of Wuhan Institute of Technology,2015,37(04):17-22.[doi:10. 3969/j. issn. 1674—2869. 2015. 04. 004]
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HPD—100大孔树脂吸附葛根异黄酮的热力学和动力学(/HTML)
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《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:
37
期数:
2015年04期
页码:
17-22
栏目:
化学与化学工程
出版日期:
2015-04-30

文章信息/Info

Title:
Adsorption kinetics and thermodynamics of Pueraia isoflavonoids on HPD-100 macroporous resin
文章编号:
1674—2869(2015) 04—0017—06
作者:
刘 哲1张越非1池汝安12*
1.武汉工程大学化工与制药学院,湖北 武汉 430074;2.绿色化工过程教育部重点实验室(武汉工程大学),湖北 武汉 430074
Author(s):
LIU Zhe1 ZHANG Yue-fei1CHI Ru-an1
1.School of Chemical Engineering and Pharmacy, Wuhan Institute of Technology, Wuhan 430074, China;2. Key Laboratory of Green Chemical Process(Wuhan Institute of Technology),Ministry of Education,Wuhan 430074, China
关键词:
葛根异黄酮HPD-100吸附热力学动力学
Keywords:
Pueraria isoflavonoid HPD-100 macroporous resin adsorption thermodynamics kinetics
分类号:
TQ013.1;TQ013.2
DOI:
10. 3969/j. issn. 1674—2869. 2015. 04. 004
文献标志码:
A
摘要:
通过298、308 K和318 K温度下的平衡吸附实验和298 K下的动力学实验,考察了HPD-100大孔吸附树脂吸附水溶液中葛根异黄酮的热力学和动力学过程. 分别用Langmuir和Freundlich等温方程对热力学数据进行拟合并计算得到各热力学参数,结果表明,HPD-100树脂对水溶液中葛根异黄酮的吸附可用Freundlich吸附模型描述(相关系数大于0.992),吸附为不均匀表面的多分子层吸附. 负的热力学焓变和吉布斯自由能证实反应为可自发进行的放热过程,低温有利于吸附的进行,负的熵变说明吸附后体系的混乱度降低. 动力学实验结果显示,吸附为快速过程. 通过拟一级/二级动力学方程的拟合可知,HPD-100吸附水溶液中葛根异黄酮的过程遵循拟二级吸附动力学(相关系数大于0.99)规律. 吸附速率随异黄酮初始浓度升高而显著降低.
Abstract:
The adsorption thermodynamics and kinetics of Pueraia isoflavonoids in aqueous solution on HPD-100 macroporous resin were investigated by kinetics at 298 K and adsorption isotherm experiments were conducted at the temperatures of 298, 308 K and 318 K. The absorption isotherm was fitted with Langmuir and Freundlich isotherm adsorption equations respectively. The results indicate that the adsorption process obey Freundlich isotherm model other than Langmuir model as related coefficient is higher than 0.992, so the adsorption is polymolecular layer adsorption of uneven surface. Thermodynamic parameters were calculated and negative thermodynamic enthalpy and Gibbs free energy indicate that the adsorption is an exothermic and spontaneous process. Thus, low temperature is benefit to it. Negative thermodynamic entropy shows that the randomness of the system becomes lower after adsorption. Kinetic experimental data reveal that the adsorption is a fast process and pseudo-second order model is more suitable for the adsorption of the isoflavonoids on HPD-100 resin as related coefficient is higher than 0.99. The reaction rate decreases obviously with the increase of initial concentration of isoflavonoids.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期::2015—3—26基金项目:国家自然科学基金(21006075);湖北省自然科学基金(2014CFA115)作者简介:刘哲(1989-),女,湖北武汉人,硕士研究生,研究方向:矿物加工、分离工程援.* 通信联系人
更新日期/Last Update: 2015-05-24