SCI和EI收录∣中国化工学会会刊

›› 2015, Vol. 23 ›› Issue (9): 1551-1556.DOI: 10.1016/j.cjche.2015.06.010

• 能源、资源与环境技术 • 上一篇    下一篇

Removal of diclofenac from aqueous solution with multi-walled carbon nanotubes modified by nitric acid

Xiang Hu, Zhao Cheng   

  1. College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • 收稿日期:2014-06-19 修回日期:2015-01-28 出版日期:2015-09-28 发布日期:2015-10-24
  • 通讯作者: Xiang Hu
  • 基金资助:
    Supported by the National Natural Science Foundation of China (50878014, 51178022).

Removal of diclofenac from aqueous solution with multi-walled carbon nanotubes modified by nitric acid

Xiang Hu, Zhao Cheng   

  1. College of Chemical Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2014-06-19 Revised:2015-01-28 Online:2015-09-28 Published:2015-10-24
  • Supported by:
    Supported by the National Natural Science Foundation of China (50878014, 51178022).

摘要: Modified multi-walled carbon nanotubes (MWCNTs) were used as adsorbents for removal of diclofenac. The reaction conditions were examined. Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich isotherm models were applied to determine appropriate equilibrium expression. The results show that the experimental data fit the Freundlich equation well. Thermodynamic parameters show that the adsorption process is spontaneous and exothermic. The kinetic study indicates that the adsorption of diclofenac can be well described with the pseudo-second-order kinetic model and the process is controlled by multiple steps.

关键词: Diclofenac, Multi-walled carbon nanotubes, Adsorption, Isotherm equilibrium, Thermodynamic, Kinetic modeling

Abstract: Modified multi-walled carbon nanotubes (MWCNTs) were used as adsorbents for removal of diclofenac. The reaction conditions were examined. Langmuir, Freundlich, Temkin, and Dubinin-Radushkevich isotherm models were applied to determine appropriate equilibrium expression. The results show that the experimental data fit the Freundlich equation well. Thermodynamic parameters show that the adsorption process is spontaneous and exothermic. The kinetic study indicates that the adsorption of diclofenac can be well described with the pseudo-second-order kinetic model and the process is controlled by multiple steps.

Key words: Diclofenac, Multi-walled carbon nanotubes, Adsorption, Isotherm equilibrium, Thermodynamic, Kinetic modeling