Abstract
In the present study, Fe3O4@TiO2/Cu2O nanocomposites were synthetized and supported on granular activated carbon (GAC). The synthesized nanocomposite coated on GAC was used as catalyst in photocatalytic process for 2,4-dichloropenoxyacetic acid (2,4-D) removal from aqueous solutions. The coated nanocomposite was characterized using XRD, TEM, BET, VSM, UV–Vis DRS, SEM and EDX tests to evaluate its surface morphology and elemental compounds. Results indicated that the photocatalytic efficiency for the removal of 2,4-D was reduced with increasing solution pH, and the maximum removal efficiency was obtained at solution pH of 5. The photocatalytic efficiency was increased with increasing catalyst dosage from 0.1 to 0.4 g/L. The results implied that reaction temperature played a key role in the photocatalytic performance and the process efficiency increased with increasing reaction temperature in the range of 10–35 °C. The kinetic study showed that the photocatalytic process followed the first-order kinetic model. Moreover, in the photocatalytic process, ·OH acted as the main agent for the oxidation of 2,4-D. According to the results, Fe3O4@TiO2/Cu2O magnetic nanocomposite supported on GAC offered a suitable performance after five cycles, and therefore, it can be used as a reusable and cost-effective catalyst for removing such toxins from polluted waters.
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Acknowledgements
This paper is the results of a PhD thesis of Naghmeh Orooji at the Islamic Azad University of Ahvaz Branch. This research work was financially supported by the Islamic Azad University of Ahvaz Branch and Ahwaz Municipal Water and Wastewater Company, Khuzestan province, Iran. The authors would like to thank the Honorable Managing Director of Abfa Ahvaz Company, Engineer Moridi, and staff of Ahwaz Water and Wastewater Treatment Plant No. 2 for their help and support.
Funding
This work was supported by the Islamic Azad University of Ahvaz Branch and Ahwaz Municipal Water and Wastewater Company, Khosestan province, Iran (Grant Number ETRC 30006).
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Orooji, N., Takdastan, A., Jalilzadeh Yengejeh, R. et al. Photocatalytic degradation of 2,4-dichlorophenoxyacetic acid using Fe3O4@TiO2/Cu2O magnetic nanocomposite stabilized on granular activated carbon from aqueous solution. Res Chem Intermed 46, 2833–2857 (2020). https://doi.org/10.1007/s11164-020-04124-9
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DOI: https://doi.org/10.1007/s11164-020-04124-9