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E-Journal of Chemistry
Volume 8 (2011), Issue 4, Pages 1536-1545

Removal of Direct Yellow-12 Dye from Water by Adsorption on Activated Carbon Prepared from Ficus Racemosa L.

G. Revathi,1 S. Ramalingam,2 P. Subramaniam,3 and A. Ganapathi4

1Department of Chemistry, Sri Subramanya College of Engineering and Technology, Palani-624 615, India
2Department of Chemistry, Vivekananda College, Agasteeswaram-629 701, India
3Department of Chemistry, Aditanar College of Arts and Science, Tiruchendur-628 216, India
4Department of Chemistry, Annamalai University, Annamalai Nagar-608 002, India

Received 18 October 2010; Revised 20 February 2011; Accepted 28 February 2011

Copyright © 2011 Hindawi Publishing Corporation. 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 adsorption of direct yellow-12 dye (DY-12) by Atti leaf (Ficus racemosa) powder carbon (ATC) was carried out by varying the parameters such as agitation time, dye concentration, adsorbent dose, pH and temperature. Equilibrium adsorption data followed both Langmuir and Freundlich isotherms. Adsorption followed second-order kinetics. The adsorption capacity was found to be 6.7 mg dye per gram of the adsorbent. Acidic pH was favorable for the adsorption of DY-12. Desorption studies suggest that chemisorptions might be the major mode of adsorption.