A comparative study of dye removal using fly ash treated by different methods

The effect of different methods for fly ash treatment using conventional chemical, sonochemical and microwave method on dye adsorption in aqueous solution was investigated. Three basic dyes, methylene blue, crystal violet and rhodamine B, are employed for adsorption testing. It is found that fly ash...

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Bibliographic Details
Published in:Chemosphere (Oxford) 2005-09, Vol.60 (10), p.1401-1407
Main Authors: Wang, Shaobin, Boyjoo, Y., Choueib, A.
Format: Article
Language:English
Subjects:
Adsorption
Applied sciences
Basic dyes
Carbon - analysis
Carbon - chemistry
Carbon - radiation effects
Coal Ash
Coloring Agents - chemistry
Coloring Agents - isolation & purification
Exact sciences and technology
Fly ash
Gentian Violet - chemistry
Gentian Violet - isolation & purification
Hot Temperature
Hydrochloric Acid - chemistry
Hydrogen-Ion Concentration
Industrial Waste
Industrial wastewaters
Methylene Blue - chemistry
Methylene Blue - isolation & purification
Microwave heating
Microwaves
Particulate Matter
Pollution
Rhodamines - chemistry
Rhodamines - isolation & purification
Sonication
Sonochemical treatment
Waste Disposal, Fluid
Wastewater
Wastewaters
Water treatment and pollution
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Summary:The effect of different methods for fly ash treatment using conventional chemical, sonochemical and microwave method on dye adsorption in aqueous solution was investigated. Three basic dyes, methylene blue, crystal violet and rhodamine B, are employed for adsorption testing. It is found that fly ash shows different adsorption capacity depending on type of dyes. Chemical treatment using HCl will increase the adsorption capacity. The adsorption capacity of HCl treated fly ash varies with the preparation conditions. Microwave treatment is a fast and efficient method while producing the sample with the highest adsorption capacity. Solution pH and inorganic salts in dye solution can significantly influence the adsorption. The adsorption data have been analysed using Langmuir, Freundlich and Redlich–Peterson isotherms. The results indicate that the Freundlich and Redlich–Peterson models provide the better correlations with the experimental data.
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2005.01.091