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Please use this identifier to cite or link to this item: http://repository.iitr.ac.in/handle/123456789/2805
Title: Kinetic and equilibrium isotherm studies for the adsorptive removal of Brilliant Green dye from aqueous solution by rice husk ash
Authors: Mane V.S.
Deo Mall I.
Srivastava, Vimal Chandra
Published in: Journal of Environmental Management
Abstract: The present study deals with the adsorption of Brilliant Green (BG) on rice husk ash (RHA). RHA is a solid waste obtained from the particulate collection equipment attached to the flue gas lines of rice husk fired boilers. Batch studies were performed to evaluate the influences of various experimental parameters like initial pH (pH0), contact time, adsorbent dose and initial concentration (C0) on the removal of BG. Optimum conditions for BG removal were found to be pH0?3.0, adsorbent dose ?6 g L-1 of solution and equilibrium time ?5 h for the C0 range of 50-300 mg L-1. Adsorption of BG followed pseudo-second-order kinetics. Intra-particle diffusion does not seem to control the BG removal process. Equilibrium isotherms for the adsorption of BG on RHA were analyzed by Freundlich, Langmuir, Redlich-Peterson (R-P), Dubnin-Radushkevich (D-R), and Temkin isotherm models using a non-linear regression technique. Langmuir and R-P isotherms were found to best represent the data for BG adsorption onto RHA. Adsorption of BG on RHA is favourably influenced by an increase in the temperature of the operation. Values of the change in entropy (?S0) and heat of adsorption (?H0) for BG adsorption on RHA were positive. The high negative value of change in Gibbs free energy (?G0) indicates the feasible and spontaneous adsorption of BG on RHA. © 2006.
Citation: Journal of Environmental Management (2007), 84(4): 390-400
URI: https://doi.org/10.1016/j.jenvman.2006.06.024
http://repository.iitr.ac.in/handle/123456789/2805
Issue Date: 2007
Keywords: Adsorption kinetics
Dye removal
Error analyses
Isotherms
Rice husk ash
Thermodynamics
ISSN: 3014797
Author Scopus IDs: 15027202800
6701321866
35565811700
Author Affiliations: Mane, V.S., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Deo Mall, I., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Chandra Srivastava, V., Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, India
Funding Details: Authors are thankful to the Ministry of Human Resource and Development, Government of India, for providing financial support to undertake the work.
Corresponding Author: Deo Mall, I.; Department of Chemical Engineering, Indian Institute of Technology Roorkee, Roorkee, 247 667, India; email: id_mall2000@yahoo.co.in
Appears in Collections:Journal Publications [CH]

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