Adsorption

, Volume 17, Issue 3, pp 431–441 | Cite as

Adsorption of dyes on carbon xerogels and templated carbons: influence of surface chemistry

  • J. L. Figueiredo
  • J. P. S. Sousa
  • C. A. Orge
  • M. F. R. Pereira
  • J. J. M. Órfão
Article

Abstract

The removal of textile dyes by adsorption onto carbon materials with extended mesoporosity is addressed in the present work. Two types of high surface area carbon adsorbents were prepared, namely a carbon xerogel and a templated carbon. Both materials were subsequently subjected to appropriate treatments in order to modify their surface chemistries, while keeping their textural properties relatively unchanged. The carbon adsorbents were extensively characterized by different techniques in order to correlate their adsorption performances with the corresponding surface properties. The behavior of the different materials was evaluated by determining equilibrium adsorption isotherms of two anionic dyes (Reactive Red 241 and Acid Blue 113) at different pH values. The results are compared with data previously obtained with commercial activated carbons subjected to the same treatments, and discussed in terms of the carbon surface chemistry and the interaction between the dye molecules and the adsorbent surface (dispersive and electrostatic interactions).

Keywords

Adsorption Templated carbons Carbon xerogels Surface chemistry Dyes 

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Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • J. L. Figueiredo
    • 1
  • J. P. S. Sousa
    • 1
  • C. A. Orge
    • 1
  • M. F. R. Pereira
    • 1
  • J. J. M. Órfão
    • 1
  1. 1.Laboratório de Catálise e Materiais, Laboratório Associado LSRE/LCM, Departamento de Engenharia Química, Faculdade de EngenhariaUniversidade do PortoPortoPortugal

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