Multiwalled Carbon Nanotubes as Adsorbents for the Kinetic and Equilibrium Study of the Removal of Alizarin Red S and Morin

The multiwalled carbon nanotube has been used as an efficient adsorbent for the removal of Alizarin red S (ARS) and morin from wastewater. The influence of variables including pH, temperature, concentration of the dye, amount of adsorbents and contact time, and so forth on the removal of both dyes w...

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Bibliographic Details
Published in:Journal of chemical and engineering data 2011-05, Vol.56 (5), p.2511-2520
Main Authors: Ghaedi, M, Hassanzadeh, A, Kokhdan, S. Nasiri
Format: Article
Language:English
Subjects:
Applied sciences
Chemistry
Exact sciences and technology
General and physical chemistry
General purification processes
Pollution
Solid-liquid interface
Surface physical chemistry
Wastewaters
Water treatment and pollution
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Summary:The multiwalled carbon nanotube has been used as an efficient adsorbent for the removal of Alizarin red S (ARS) and morin from wastewater. The influence of variables including pH, temperature, concentration of the dye, amount of adsorbents and contact time, and so forth on the removal of both dyes was investigated by the batch method. Graphical correlations of various adsorption isotherm models like Langmuir, Freundlich, Tempkin, and Dubinin−Radushkevich have been carried out. The adsorption of ARS and morin has been found to be endothermic and feasible in nature. Various thermodynamic parameters, such as Gibbs free energy, entropy, and enthalpy, of the ongoing adsorption process have been calculated. The kinetic studies suggest the process following pseudosecond-order kinetics and involvement of the particle-diffusion mechanism.
ISSN:0021-9568
1520-5134
DOI:10.1021/je2000414