纺织学报 ›› 2012, Vol. 33 ›› Issue (5): 95-100.

• 染整与化学品 • 上一篇    下一篇

热改性凹凸棒粘土的吸附热力学和动力学研究

 王玉环, 王建庆, 张玉, 曹佃元, 李戎   

  1. 东华大学国家染整工程技术研究中心
  • 收稿日期:2011-07-01 修回日期:2012-02-15 出版日期:2012-05-15 发布日期:2012-05-15
  • 通讯作者: 王建庆 E-mail:jqwang@dhu.edu.cn

Study on adsorption thermodynamics and kinetics of thermal-modified attapulgite clay

 WANG  Yu-Huan, WANG  Jian-Qing, ZHANG  Yu, CAO  Dian-Yuan, LI  Rong   

  1. National Engineering Research Center for Dyeing & Finishing of Textiles
  • Received:2011-07-01 Revised:2012-02-15 Online:2012-05-15 Published:2012-05-15

摘要: 进行了热改性凹凸棒粘土对亚甲基蓝的吸附热力学和动力学性能研究。实验表明:在初始染料质量浓度为50~600mg/L、温度为298~338K时,热改性凹凸棒粘土对亚甲基蓝的吸附符合Langmuir等温吸附方程,△H为1.92 KJ/mol,△G在-25.429~-29.097 KJ/mol之间,△S大于零,此过程为一自发的吸热过程;其吸附动力学数据符合准二级速率方程,吸附表观活化能分别为13.5676 KJ/mol。提出了热改性凹凸棒粘土对亚甲基蓝的吸附过程是由膜扩散和化学吸附共同控制的观点。

关键词: 凸凹棒黏土 , 热改性 , 吸附热力学 , 吸附动力学

Abstract: The adsorptive thermodynamics and kinetics of Methylene Blue on thermal-modified Attapulgite clay was investigated. It can be seen that the Methylene Blue equilibrium adsorption data were ?tted to Langmuir isotherm models and the adsorptive process as the Methylene Blue was in an initial concentration range of 50~600mg/L and the experimental temperature was in the range of 298~338K. The adsorption enthalpy changes and the adsorption Gibbs free energy changes are 1.92KJ/mol and -25.429~-29.097 KJ/mol independently. The positive values of adsorption entropy changes illustrate the adsorption of the Methylene Blue onto thermal-modified Attapulgite clay is endothermic and spontaneous. The adsorptive kinetics data were in good agreement with the pseudo-second rate equation. The apparent adsorption activation energy of the thermal-modified Attapulgite clay is 13.5676KJ/mol. It suggests this adsorption may involve the combined control of chemical adsorption and film diffusion.

Key words: attapulgite clay , thermal-modification , adsorption thermodynamics , adsorption kinetics

中图分类号: 

  • TS190.2
[1] 高慧英 蒙冉菊 华佳瑞 邵碧琼 刘琳 姚菊明. 改性废棉对水溶液中Cu2+的吸附性能[J]. 纺织学报, 2017, 38(12): 112-118.
[2] 方芳芳 侯秀良 代雅轩 杨麦萍. 高粱壳色素上染毛织物的动力学和热力学[J]. 纺织学报, 2015, 36(03): 70-0.
[3] 董静 黄建骅 程岚 冉瑞龙 张同华 吴大洋. 改性棕榈纤维活性炭对活性染料的吸附性能[J]. 纺织学报, 2014, 35(5): 72-0.
[4] 王成芳 封严 赵健. 共聚甲基丙烯酸酯纤维对三氯乙烯的吸附动力学及热力学[J]. 纺织学报, 2013, 34(8): 12-0.
[5] 陈程 张光先 张凤秀 张袁松. 双辛基二甲基溴化铵对活性染料在丝绸上的促染[J]. 纺织学报, 2013, 34(12): 60-0.
[6] 李双江;沈茂;吴琦;单志;陈惠. 磁响应酵母对直接黄R染料的吸附动力学研究[J]. 纺织学报, 2011, 32(2): 73-78.
[7] 徐超武;朱新生. 超细聚苯乙烯磺酸钠颗粒的吸附性能[J]. 纺织学报, 2008, 29(10): 21-24.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!