Applicability of Coal Bottom Ash from Thermoelectric Power Plant as an Alternative Heterogeneous Catalyst in Photo-Fenton Reaction

In this work, coal bottom ash, a residue generated in thermoelectric power plant, was employed as an alternative catalyst in photo-Fenton reaction for the degradation of sunset yellow dye from liquid solution under visible irradiation. The residue was characterized by techniques such as XRD, XRF, N...

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Bibliographic Details
Published in:Water, air, and soil pollution air, and soil pollution, 2019-12, Vol.230 (12), Article 274
Main Authors: Drumm, Fernanda Caroline, Grassi, Patrícia, Sulkovski, Aline Alexia, Franco, Dison Stracke Pfingsten, Georgin, Jordana, Dotto, Guilherme Luiz, Foletto, Edson Luiz, Jahn, Sérgio Luiz
Format: Article
Language:English
Subjects:
Atmospheric Protection/Air Quality Control/Air Pollution
Azo dyes
Bottom ash
Catalysts
Chemical composition
Climate Change/Climate Change Impacts
Coal
Color removal
Colour
Contaminants
Dosage
Dyes
Earth and Environmental Science
Electric power generation
Electric power-plants
Environment
Environmental monitoring
Ferric oxide
Hydrogen peroxide
Hydrogeology
Iron oxides
Irradiation
Organic chemistry
Organic contaminants
pH effects
Pollutant removal
Polynomials
Power plants
Regression analysis
Regression models
Removal
Response surface methodology
Soil Science & Conservation
Sunset
Thermoelectricity
Water Quality/Water Pollution
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Summary:In this work, coal bottom ash, a residue generated in thermoelectric power plant, was employed as an alternative catalyst in photo-Fenton reaction for the degradation of sunset yellow dye from liquid solution under visible irradiation. The residue was characterized by techniques such as XRD, XRF, N 2 adsorption/desorption isotherms, SEM/EDS, and FT-IR. The influence of reaction parameters such as solution pH, catalyst dosage, and H 2 O 2 concentration on dye removal was analyzed by a central composite rotatable design 2 3 . According to the characterization results, the presence of iron in the material was confirmed by analysis of chemical composition by XRF, presenting 5.5 wt% in terms of iron oxide. Through the response surface methodology, it was possible to adjust the polynomial model and determine the optimum region of dye removal. The regression model was predictive and significant, with a coefficient of determination ( R 2 ) equivalent to 91%, showing a good fit between the experimental and theoretical values. The optimum region reaching a color removal of 91% has a pH level of 2.7, catalyst dosage of 0.9 g L −1 , and H 2 O 2 concentration of 10 mmol L −1 . Therefore, coal bottom ash, an abundant residue with low cost, showed to be a potential catalyst in a photo-Fenton process for the removal of organic contaminant from liquid solution.
ISSN:0049-6979
1573-2932
DOI:10.1007/s11270-019-4327-2