Enhanced dye-removal performance of Cu-TiO2-fly ash composite by optimized adsorption and photocatalytic activity under visible light irradiation
The performance of Cu/TiO2/FA composite, a hybrid adsorbent-photocatalyst consisting of copper-doped titania particles supported on fly ash, was optimized, under visible light irradiation, for the removal of the model dye pollutant methyl orange (MO) by using a response surface methodology and Box-...
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| Main Authors: | , , , |
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| Format: | Article |
| Language: | en |
| Published: |
Springer Nature
2021
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| Subjects: | |
| Online Access: | http://ir.unimas.my/id/eprint/48731/1/s11356-021-15440-x.pdf http://ir.unimas.my/id/eprint/48731/ https://link.springer.com/article/10.1007/s11356-021-15440-x https://doi.org/10.1007/s11356-021-15440-x |
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| Summary: | The performance of Cu/TiO2/FA composite, a hybrid adsorbent-photocatalyst consisting of copper-doped titania particles
supported on fly ash, was optimized, under visible light irradiation, for the removal of the model dye pollutant methyl orange (MO) by using a response surface methodology and Box-Behnken experimental design. Three independent variables were considered for the optimization study: catalyst/solvent dosage (0.5 – 2.0 g/L), irradiation time (30–120 min), and the initial concentration (5– 25 ppm) of the dye. A 99.91% rate of removal was achieved using 2 g/L dosage, 5 ppm initial concentration, and 100 min of irradiation time as the optimal operating conditions. The recorded trends support the hypothesis of a combined
and synergic adsorption-photocatalytic degradation process which fully exploits the “capture and destroy” approach for pollutant removal. |
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