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Journal of Chemistry
Volume 2013, Article ID 519304, 6 pages
Research Article

Evaluation of Thermodynamic Parameters of 2, 4-Dichlorophenoxyacetic Acid (2, 4-D) Adsorption

1Department of Chemistry, SFS College, RTM Nagpur University, Nagpur 440006, India
2Department of Chemical Technology, Laxminarayan Institute of Technology, RTM Nagpur University, Nagpur 440033, India
3School of Chemical Sciences, SRTM University, Nanded 431606, India

Received 13 June 2012; Accepted 5 October 2012

Academic Editor: J. Morillo Aguado

Copyright © 2013 A. S. Ghatbandhe et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Thermodynamic parameters of 2, 4-Dichlorophenoxyacetic acid (2, 4-D) adsorption were evaluated by studying the adsorption equilibrium and kinetics of 2, 4-D at different temperatures. Uptake capacity of activated carbon increases with temperature. Langmuir isotherm models were applied to experimental data of 2, 4-D adsorption. Equilibrium data fitted very well to the Langmuir equilibrium model. Adsorbent monolayer capacity , Langmuir constant and adsorption rate constant were evaluated at different temperatures for activated carbon adsorption. The activation energy of adsorption ( ) was determined using the Arrhenius equation. Using the thermodynamic equilibrium coefficients obtained at different temperatures, the thermodynamic constants of adsorption ( , , and ) were evaluated. The obtained values of thermodynamic parameters show that the adsorption of 2, 4-D is an endothermic process.