Abstract
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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This work was supported by the Universiti Malaysia Sarawak under the Tun Openg Chair (F07/ TOC/1737/2018).
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Devagi Kanakaraju involved in research grant acquisition, research project administration, experimental design, supervision, interpretation of data, and revising the manuscript. Muhamad Akif Aizuddin bin Jasni contributed to performing experiments, data analyses, and writing the manuscript. Andrea Pace contributed in reviewing the manuscript and interpretation of data. Muhamad Hazim bin Ya conducted synthesis of samples, data collection, and data analyses.
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Kanakaraju, D., Jasni, M.A.A., Pace, A. et al. Enhanced dye-removal performance of Cu-TiO2-fly ash composite by optimized adsorption and photocatalytic activity under visible light irradiation. Environ Sci Pollut Res 28, 68834–68845 (2021). https://doi.org/10.1007/s11356-021-15440-x
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DOI: https://doi.org/10.1007/s11356-021-15440-x