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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2817
Title: Adsorptive removal of malachite green dye from aqueous solution by bagasse fly ash and activated carbon-kinetic study and equilibrium isotherm analyses
Authors: Mall I.D.
Srivastava, Vimal Chandra
Agarwal N.K.
Mishra I.M.
Published in: Colloids and Surfaces A: Physicochemical and Engineering Aspects
Abstract: Adsorption of malachite green (MG) was studied using three adsorbents namely, bagasse fly ash (BFA), a sugar industry waste, and activated carbons commercial grade (ACC) and laboratory grade (ACL). Batch adsorption studies were conducted to evaluate the effect of various parameters such as pH, adsorbent dose, contact time and initial MG concentration on the removal of MG. The initial pH of the dye solution strongly affected the chemistry of both the dye molecules and adsorbents in an aqueous solution. The effective pH was 7.0 for adsorption of MG by the three adsorbents. Equilibrium reached in about 4 h contact time. Optimum BFA, ACC and ACL dosages were found to be 1, 20 and 4 g l-1, respectively. The adsorption followed pseudo-second-order kinetics. Equilibrium adsorption data on BFA, ACC and ACL were analyzed by Freundlich, Langmuir, Dubnin-Radushkevich, Redlich-Peterson and Temkin isotherm equations using regression analysis. Non-linear error analysis showed that the Freundlich isotherm best-fits the equilibrium data for adsorptive removal of MG by BFA and ACC and Redlich-Peterson best follows the equilibrium data for ACL. Thermodynamic study showed that MG adsorption on BFA was comparable to that obtained with ACC or ACL. © 2005 Elsevier B.V. All rights reserved.
Citation: Colloids and Surfaces A: Physicochemical and Engineering Aspects (2005), 264(43833): 17-28
URI: https://doi.org/10.1016/j.colsurfa.2005.03.027
http://repository.iitr.ac.in/handle/123456789/2817
Issue Date: 2005
Publisher: Elsevier
Keywords: Adsorption kinetics
Bagasse fly ash
Dye removal
Error analyses
Isotherms
ISSN: 9277757
Author Scopus IDs: 55664368900
35565811700
56948761700
23668474600
Author Affiliations: Mall, I.D., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India
Srivastava, V.C., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India
Agarwal, N.K., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India
Mishra, I.M., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India
Corresponding Author: Mall, I.D.; Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, India; email: id_mall2000@yahoo.co.in
Appears in Collections:Journal Publications [CH]

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