High-performance removal of toxic phenol by single-walled and multi-walled carbon nanotubes: Kinetics, adsorption, mechanism and optimization studies

  • Mohammad Hadi Dehghani
  • , Masoome Mostofi
  • , Mahmood Alimohammadi
  • , Gordon McKay
  • , Kaan Yetilmezsoy
  • , Ahmad B. Albadarin
  • , Behzad Heibati*
  • , Mohammad AlGhouti
  • , N. M. Mubarak
  • , J. N. Sahu
  • *Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The adsorption capabilities of two nano-sized adsorbents: multi-walled carbon nanotubes (MWCNTs) and single-walled carbon nanotubes (SWCNTs) were investigated for the removal of toxic phenol. The maximum adsorption capacities of MWCNTs and SWCNTs were determined as 64.60 and 50.51 mg/g, respectively. Adsorption kinetics followed the pseudo-second order model for both adsorbents. The optimum conditions using SWCNTs and MWCNTs were pH 6.57 and 4.65, phenol concentration 50 and 50 mg/L, dose 1.97 and 2 g/L and contact time 36 and 56 min, respectively. The results indicated that MWCNTs and SWCNTs were proven as high-performance adsorbents for toxic phenol removal from wastewater.

Original languageEnglish
Pages (from-to)63-74
Number of pages12
JournalJournal of Industrial and Engineering Chemistry
Volume35
DOIs
Publication statusPublished - 25 Mar 2016

Keywords

  • Adsorption
  • Carbon nanotubes
  • Kinetics
  • Optimization
  • Phenol

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