A kinetic and thermodynamic investigation into the removal of methyl orange from wastewater utilizing fly ash in different process configurations

A kinetic and thermodynamic investigation into the removal of methyl orange from wastewater utilizing fly ash in different process configurations

The removal of methyl orange using coal fly ash, which is a widely available low-cost adsorbent, has been investigated. Adsorption studies for dye removal were conducted using various configurations such as batch, column and heap adsorption at various temperatures and adsorbent dosages at neutral pH...

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Bibliographic Details
Published in:Environmental geochemistry and health Vol. 43; no. 7; pp. 2539 - 2550
Main Authors: Potgieter, J. H., Pardesi, C., Pearson, S.
Format: Journal Article
Language:English
Published: Dordrecht Springer Netherlands 01-07-2021
Springer Nature B.V
Subjects:
Adsorbents
Adsorption
Color removal
Configurations
Dyes
Earth and Environmental Science
Economic analysis
Endothermic reactions
Environment
Environmental Chemistry
Environmental Health
Fly ash
Geochemistry
Kinetics
Original Paper
Public Health
Removal
Soil Science & Conservation
Terrestrial Pollution
Wastewater
Coal fly ash
Heap adsorption
Methyl orange
Batch
Column
Adsorption studies
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Summary:The removal of methyl orange using coal fly ash, which is a widely available low-cost adsorbent, has been investigated. Adsorption studies for dye removal were conducted using various configurations such as batch, column and heap adsorption at various temperatures and adsorbent dosages at neutral pH. The Langmuir, Freundlich and Tempkin isotherm models were used to describe the process. The Freundlich model best represented the adsorption. Kinetic studies show the adsorption followed pseudo-second-order kinetics. Thermodynamic studies show that the process is spontaneous, endothermic and random. Column configuration was found to be the most efficient with a dye removal percentage of 99.95%, followed by heap adsorption at 99.25% removal and lastly batch configuration with 96.68% removal. Economic analysis shows that column operation would be the most effective for practical implementation.
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ISSN:0269-4042
1573-2983
DOI:10.1007/s10653-020-00567-6