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Journal of Chemistry
Volume 2013 (2013), Article ID 383985, 6 pages
Research Article

Removal of Methylene Blue from Wastewater by Adsorption onto ZnCl2 Activated Corn Husk Carbon Equilibrium Studies

Department of Chemistry, Sciences Faculty, Islamic Azad University, Arak Branch, P.O. Box 38135-567, Arak, Iran

Received 29 June 2012; Accepted 30 January 2013

Academic Editor: Huu Hao Ngo

Copyright © 2013 Maryam Khodaie 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.


The removal of methylene blue by activated carbon of corn husk by ZnCl2 activation ( ) was investigated in the present study. Adsorption studies were performed by batch experiments. The effect of pH, initial dye concentration, adsorbent dose, the particle size of , agitation speed, temperature, and contact time was explored. The equilibrium adsorption data were analyzed using two widely applied isotherms: Langmuir, Freundlich. Best fits were found to be Freundlich isotherm. Langmuir adsorption capacity ( ) in 298, 308, and 318 K is 462.96, 546.45, and 662.25 mgg−1. The amount of indicates that has a favorable adsorption. Maximum MB removal was observed at pH 4.0. The results indicate that is an efficient adsorbent for removing dye from wastewater.