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High-Performance Removal of Toxic Phenol by Single-Walled and Multi-Walled Carbon Nanotubes: Kinetics, Adsorption, Mechanism and Optimization Studies Publisher



Dehghani MH1, 2 ; Mostofi M1 ; Alimohammadi M1 ; Mckay G3 ; Yetilmezsoy K4 ; Albadarin AB5 ; Heibati B1 ; Alghouti M6 ; Mubarak NM7 ; Sahu JN8
Authors
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Authors Affiliations
  1. 1. Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Institute for Environmental Research, Center for Solid Waste Research, Tehran, Iran
  3. 3. Division of Sustainability, Hamad bin Khalifa University, Education City, Qatar Foundation, Doha, Qatar
  4. 4. Department of Environmental Engineering, Faculty of Civil Engineering, Yildiz Technical University, Davutpasa Campus, Esenler, Istanbul, 34220, Turkey
  5. 5. Department of Chemical and Environmental Sciences, University of Limerick, Limerick, Ireland
  6. 6. Department of Biological and Environmental Sciences, College of Arts and Sciences, Qatar University, State of Qatar, Doha, Qatar
  7. 7. Department of Chemical Engineering, School of Engineering and Science, Curtin University of Technology, Miri, Sarawak, 98009, Australia
  8. 8. Petroleum and Chemical Engineering Programme Area, Faculty of Engineering, Institut Teknologi Brunei, PO Box 2909, Tungku Gadong, Brunei Darussalam

Source: Journal of Industrial and Engineering Chemistry Published:2016


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. © 2015 The Korean Society of Industrial and Engineering Chemistry.