天然产物研究与开发 ›› 2011, Vol. 23 ›› Issue (3): 526-529.

• 开发研究 • 上一篇    下一篇

脱乙酰魔芋葡苷聚糖对刚果红吸附性能研究

吕文平1,汪 超1,2*,江贵林1,陈文平1,陈士勇1,钟晓凌1,姜发堂1,2   

  1. 1湖北工业大学生物工程学院;2武汉力诚生物科技有限公司,武汉 430068
  • 收稿日期:2010-01-06 出版日期:2011-06-25 发布日期:2011-08-08
  • 通讯作者: wangchao5412@163.com
  • 基金资助:

    武汉市晨光计划(20065004116-52);湖北省教育厅(20063036)

Adsorption Properties of Congo Red On Deacetylation of KGM

LV wen-ping1, WANG chao1,2*, JIANG gui-lin1, CHEN wen-ping1, CHEN shi-yong1, ZHONG xiao-ling1, JIANG fa-tang1,2   

  1. 1Bioengineering College,Hubei University of Technology; 2Wuhan Licheng Biotechnology Co Ltd, Wuhan 430068, China
  • Received:2010-01-06 Online:2011-06-25 Published:2011-08-08

摘要:

采用静态吸附法研究脱乙酰魔芋葡苷聚糖对刚果红的吸附特性。结果表明,脱乙酰魔芋葡苷聚糖脱色率达92%,吸附速率符合拟二级速率方程,吸附等温线符合Freundlich吸附等温式。根据热力学函数关系计算出吸附焓变(ΔH)为11.033 kJ/mol,为吸热反应,升高温度有利于吸附;且不同温度下的吉布斯自由能变(ΔG)均小于0,表明脱乙酰魔芋葡苷聚糖对刚果红的吸附是自发过程。

关键词: 脱乙酰魔芋葡苷聚糖, 刚果红染料, 吸附, 动力学, 热力学

Abstract:

The adsorption characteristics of congo red onto the deacetylation of konjac glucomannan (KGM) were investigated by static adsorption method. The results showed that the deacetylation of KGM was effective low cost adsorbent with high removal of dyes. The best percent color removal of congo red is about 92% or so. The adsorption kinetics can be well described by the pseudo-second order kinetics model. The adsorption isotherm of congo red can be well fitted the Freundlich equation. Thermodynamic functions calculated according to the relationship between adsorption enthalpy change (ΔH) for the 11.033kJ/mol, indicateed that the adsorption reaction is endothermic reaction, higher temperatures help adsorption. At different temperatures, Gibbs free energy change (ΔG) were less than 0, indicating that deacetylation of KGM congo red adsorption was spontaneous process.

Key words: deacetylation of konjac glucomannan, congo red, adsorption, kinetics, thermodynamics

中图分类号: 

O647.31. 6.2