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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2795
Title: Rice husk ash as an effective adsorbent: Evaluation of adsorptive characteristics for Indigo Carmine dye
Authors: Lakshmi U.R.
Srivastava, Vimal Chandra
Mall I.D.
Lataye D.H.
Published in: Journal of Environmental Management
Abstract: Present study explored the adsorptive characteristics of Indigo Carmine (IC) dye from aqueous solution onto rice husk ash (RHA). Batch experiments were carried out to determine the influence of parameters like initial pH (pH0), contact time (t), adsorbent dose (m) and initial concentration (C0) on the removal of IC. The optimum conditions were found to be: pH0 = 5.4, t = 8 h and m = 10.0 g/l. The pseudo-second-order kinetic model represented the adsorption kinetics of IC on to RHA. Equilibrium isotherms were analyzed by Freundlich, Langmuir, Temkin and Redlich-Peterson models using a non-linear regression technique. Adsorption of IC on RHA was favorably influenced by an increase in the temperature of the operation. The positive values of the change in entropy (?S0) and heat of adsorption (?H0); and the negative value of change in Gibbs free energy (?G0) indicate feasible and spontaneous adsorption of IC on to RHA. © 2008 Elsevier Ltd. All rights reserved.
Citation: Journal of Environmental Management (2009), 90(2): 710-720
URI: https://doi.org/10.1016/j.jenvman.2008.01.002
http://repository.iitr.ac.in/handle/123456789/2795
Issue Date: 2009
Keywords: Adsorption kinetics
Adsorption thermodynamics
Indigo Carmine
Isotherms
Rice husk ash
ISSN: 3014797
Author Scopus IDs: 23501777300
35565811700
55664368900
14033330100
Author Affiliations: Lakshmi, U.R., 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
Mall, I.D., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Lataye, D.H., 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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