Uptake of Reactive Black 5 by pumice and walnut activated carbon: Chemistry and adsorption mechanisms

The potential of using pumice and walnut wood activated carbon as low-cost adsorbents for the removal of the diazo dye Reactive Black 5 (RB5) from aqueous solutions was investigated. The Langmuir isotherm fit to the data specified the presence of two different natures of adsorption sites with differ...

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Bibliographic Details
Published in:Journal of industrial and engineering chemistry (Seoul, Korea) 2014, 20(5), , pp.2939-2947
Main Authors: Heibati, Behzad, Rodriguez-Couto, Susana, Amrane, Abdeltif, Rafatullah, Mohd, Hawari, Alaa, Al-Ghouti, Mohammad A.
Format: Article
Language:English
Subjects:
Activated carbon
Adsorbents
Adsorption
Chemical Sciences
Diffusion
Inorganic chemistry
Pumice
Surface chemistry
Walnuts
Wood
화학공학
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Summary:The potential of using pumice and walnut wood activated carbon as low-cost adsorbents for the removal of the diazo dye Reactive Black 5 (RB5) from aqueous solutions was investigated. The Langmuir isotherm fit to the data specified the presence of two different natures of adsorption sites with different binding energies on the AC-W surface. Kinetic modelling showed that the adsorption behaviour and mechanism of RB5 for both adsorbents is believed to happen via surface adsorption followed by diffusion into the pores of the AC-W and pumice. The main adsorption mechanisms are hydrogen bonding, electrostatic bonding and n- pi interactions.
ISSN:1226-086X
1876-794X
DOI:10.1016/j.jiec.2013.10.063