Competitive adsorption of phenol and 3-chlorophenol on purified MWCNTs

Ajna Tóth, Andrea Törocsik, Etelka Tombácz, Krisztina László

Research output: Contribution to journalArticle

29 Citations (Scopus)


A commercial multiwall carbon nanotube and its carboxylated derivate (CNTC and COOHC, respectively) was used after purification to study the competitive adsorption of phenol (P) and m-chlorophenol (CP) from 0.1. M aqueous NaCl solutions without external pH control. The adsorption takes place practically exclusively on the external surface of the nanotubes. The uptake of P is suppressed in comparison to its single solute behaviour on both nanotubes, independently of the initial pollutant concentration. The uptake of CP however is more sensitive to the concentration and the surface chemistry of the nanotube. The measured co-adsorption isotherms were compared to the isotherms calculated from the competitive Langmuir model (CLM). Preferential adsorption of CP was observed in about 95% of the relative concentration range. The total adsorption may exceed the corresponding single component sorption capacity.

Original languageEnglish
Pages (from-to)244-249
Number of pages6
JournalJournal of colloid and interface science
Issue number1
Publication statusPublished - Dec 1 2012


  • 3-Chlorophenol
  • Carbon nanotubes
  • Competitive Langmuir model
  • Competitive adsorption
  • Phenol

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Surfaces, Coatings and Films
  • Colloid and Surface Chemistry

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