Removal and recovery of hazardous triphenylmethane dye, Methyl Violet through adsorption over granulated waste materials

Bottom Ash a power plant waste material and De-Oiled Soya, an agricultural waste product have been successfully used for the removal and recovery of a hazardous triphenylmethane dye—Methyl Violet, from wastewaters. The characterization of each adsorbent has been carried out by I.R. and D.T.A. curves...

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Bibliographic Details
Published in:Journal of hazardous materials 2008-01, Vol.150 (2), p.364-375
Main Authors: Mittal, Alok, Gajbe, Vibha, Mittal, Jyoti
Format: Article
Language:English
Subjects:
Adsorption
Agriculture, rearing and food industries wastes
Applied sciences
Bottom Ash
Carbon
Chemical engineering
Coal Ash
De-Oiled Soya
Dye
Exact sciences and technology
General purification processes
Gentian Violet - isolation & purification
Glycine max - chemistry
Hydrogen-Ion Concentration
Industrial Waste - analysis
Kinetics
Methyl Violet
Particle Size
Particulate Matter - chemistry
Pollution
Temperature
Thermodynamics
Wastes
Wastewaters
Water treatment and pollution
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Summary:Bottom Ash a power plant waste material and De-Oiled Soya, an agricultural waste product have been successfully used for the removal and recovery of a hazardous triphenylmethane dye—Methyl Violet, from wastewaters. The characterization of each adsorbent has been carried out by I.R. and D.T.A. curves. Batch adsorption studies have been made by measuring effects of pH, sieve size, amount of adsorbent, contact time, temperature, concentration of the adsorbate solution, etc. Kinetic studies have been used to determine the nature of rate controlling step of the processes and confirm the applicability of the first order rate expression in the ongoing adsorption process. Various thermodynamic parameters have also been calculated by applying the linear forms of Langmuir and Freundlich adsorption isotherms. The linear nature of adsorption isotherms obtained shows the dependence of the processes on the Freundlich and Langmuir isotherm models. Furthermore, to ascertain the adsorption processes to be particle diffusion or film diffusion mechanism, Boyd and Reichenberg's expressions have been applied. For both the adsorbents, column operations have been carried out for the bulk removal of the dye. The adsorbed dye has been recovered by eluting hydrochloric acid of pH 3 through exhausted columns.
ISSN:0304-3894
1873-3336
DOI:10.1016/j.jhazmat.2007.04.117