SCI和EI收录∣中国化工学会会刊

›› 2017, Vol. 25 ›› Issue (4): 523-532.DOI: 10.1016/j.cjche.2016.10.021

• Materials and Product Engineering • 上一篇    下一篇

Modelling of adsorption of textile dyes over multi-walled carbon nanotubes: Equilibrium and kinetic

Danilo Vuono1, Enrico Catizzone1, Alfredo Aloise1, Alfonso Policicchio2, Raffaele G. Agostino2, Massimo Migliori1, Girolamo Giordano1   

  1. 1 University of Calabria, Department of Environmental and Chemical Engineering, via P. Bucci, I-87036 Rende, CS, Italy;
    2 University of Calabria, Department of Physics, via P. Bucci, I-87036 Rende, CS, Italy
  • 收稿日期:2016-07-25 修回日期:2016-10-28 出版日期:2017-04-28 发布日期:2017-06-03
  • 通讯作者: Massimo Migliori
  • 基金资助:
    Supported by the University of Malaya High Impact Research Grant (HIR-MOHED000037-16001) from the Ministry of Higher Education Malaysia.

Modelling of adsorption of textile dyes over multi-walled carbon nanotubes: Equilibrium and kinetic

Danilo Vuono1, Enrico Catizzone1, Alfredo Aloise1, Alfonso Policicchio2, Raffaele G. Agostino2, Massimo Migliori1, Girolamo Giordano1   

  1. 1 University of Calabria, Department of Environmental and Chemical Engineering, via P. Bucci, I-87036 Rende, CS, Italy;
    2 University of Calabria, Department of Physics, via P. Bucci, I-87036 Rende, CS, Italy
  • Received:2016-07-25 Revised:2016-10-28 Online:2017-04-28 Published:2017-06-03
  • Supported by:
    Supported by the University of Malaya High Impact Research Grant (HIR-MOHED000037-16001) from the Ministry of Higher Education Malaysia.

摘要: The paper deals with the application of multiwall carbon nanotubes (CNTs) to the adsorption of dyes from wastewater.Textile dyes are dangerous and diffused pollutant in wastewater,and the paper results confirmed the good adsorption ability of CNTs,with respect to classic active carbon,even for different dye types.The effect of surface treatments of CNTs was primarily investigated,revealing that neither the presence of residual catalyst nor common surface treatment (oxidation) affects the CNT's performances.Therefore less expensive nonpurified CNTs were assessed as good and economically convenient alternative for the process.In order to gain in generality in adsorption kinetic modelling,the parameters of the "best fitting" pseudo-second order model have been correlated to the main process variables (the dye initial concentration and the specific mass of CNTs.) setting-up a predictive kinetic model useful design new application of these materials in currently operating industrial operations for adsorption.In addition,isothermal data were used to screen all the relevant adsorption isotherms models and the Temkin model was confirmed as the more effective to accurately fit equilibrium data for any of the considered different dye types.

关键词: Wastewater treatment, Dye adsorption, Carbon nanotubes, Adsorption kinetic, Temkin model

Abstract: The paper deals with the application of multiwall carbon nanotubes (CNTs) to the adsorption of dyes from wastewater.Textile dyes are dangerous and diffused pollutant in wastewater,and the paper results confirmed the good adsorption ability of CNTs,with respect to classic active carbon,even for different dye types.The effect of surface treatments of CNTs was primarily investigated,revealing that neither the presence of residual catalyst nor common surface treatment (oxidation) affects the CNT's performances.Therefore less expensive nonpurified CNTs were assessed as good and economically convenient alternative for the process.In order to gain in generality in adsorption kinetic modelling,the parameters of the "best fitting" pseudo-second order model have been correlated to the main process variables (the dye initial concentration and the specific mass of CNTs.) setting-up a predictive kinetic model useful design new application of these materials in currently operating industrial operations for adsorption.In addition,isothermal data were used to screen all the relevant adsorption isotherms models and the Temkin model was confirmed as the more effective to accurately fit equilibrium data for any of the considered different dye types.

Key words: Wastewater treatment, Dye adsorption, Carbon nanotubes, Adsorption kinetic, Temkin model