Equilibrium and kinetic studies of methyl orange and methyl violet adsorption on activated carbon derived from Phragmites australis

The adsorption of methyl orange and methyl violet from aqueous solutions by Phragmites australis activated carbon (PAAC) was studied in a batch adsorption system. The adsorption studies include both equilibrium adsorption isotherms and kinetics. Several isotherm models were investigated and the adso...

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Bibliographic Details
Published in:Desalination 2010-03, Vol.252 (1), p.149-156
Main Authors: Chen, Suhong, Zhang, Jian, Zhang, Chenglu, Yue, Qinyan, Li, Yan, Li, Chao
Format: Article
Language:English
Subjects:
Activated carbon
Adsorption
Applied sciences
Chemical engineering
Diffusion
Dyes
Effluents
Equilibrium isotherm
Exact sciences and technology
Isotherms
Kinetics
Methyl orange
Methyl violet
Oranges
Phragmites australis activated carbon
Pollution
Textiles
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Summary:The adsorption of methyl orange and methyl violet from aqueous solutions by Phragmites australis activated carbon (PAAC) was studied in a batch adsorption system. The adsorption studies include both equilibrium adsorption isotherms and kinetics. Several isotherm models were investigated and the adsorption isotherm data were best represented by the Temkin isotherms. The kinetic data were well described by the pseudo-second-order kinetic model. The mechanism of the adsorption process was determined from the intraparticle diffusion model. The results indicate that PAAC could be employed as a low-cost alternative for the removal of the textile dyes from effluents.
ISSN:0011-9164
1873-4464
DOI:10.1016/j.desal.2009.10.010