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E-Journal of Chemistry
Volume 9, Issue 3, Pages 1122-1134
http://dx.doi.org/10.1155/2012/603196

Comparative Studies of the Adsorption of Direct Dye on Activated Carbon and Conducting Polymer Composite

1Department of Chemistry, Al-Ameen Engineering College, Erode, Tamilnadu-638 104, India
2Department of Chemistry, Kongu Engineering College, Perundurai, Erode, Tamilnadu-638 052, India
3Department of Chemistry, Arignar Anna Government Arts College, Namakkal, Tamilnadu-637 002, India

Received 9 November 2011; Accepted 15 January 2012

Copyright © 2012 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.

Abstract

This study analyses the feasibility of removing Direct Blue 71 from aqueous solution by different adsorbents such as activated carbon (TPAC) and Poly pyrrole polymer composite (PPC) prepared from Thevetia Peruviana. Batch mode adsorption was performed to investigate the adsorption capacities of these adsorbents by varying initial dye concentration, temperature, agitation time and pH. The performance of TPAC was compared with PPC. Among the adsorbents, PPC had more adsorption capacity (88.24%) than TPAC (58.82%) at an initial concentration of 50 mg/L and at 30°C. The experimental data best fitted with pseudo second order kinetic model. The adsorption data fitted well for Langmuir adsorption isotherm. Thermodynamic parameters for the adsorbents were also evaluated. The carbon embedded in conducting polymers matrix show better adsorptive properties than activated carbon.