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E-Journal of Chemistry
Volume 7, Issue 3, Pages 975-984

Adsorption of Crystal Violet Dye onto Tamarind Seed Powder

Himanshu Patel and R. T. Vashi

Department of Chemistry, Navyug Science College, Rander Road, Surat-395009, India

Received 11 November 2009; Accepted 5 January 2010

Copyright © 2010 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 present investigation describes adsorption of crystal violet dye from its aqueous solution onto tamarind (Tamarindus indica) fruit shell powder. Initial concentration, agitation speed and pH with various temperature have been studied, in which pH was found to be most effective. The adsorption data were mathematically analyzed using adsorption isotherm like Freundlich and Langmuir isotherm to study adsorption mechanism of crystal violet onto this seed powder. Freundlich isotherm was found to be most applicable. The equilibrium data were applied to intra-particle diffusion and adsorption kinetics. The reaction was found to be pseudo second order.