Abstract
SBA-15 and KIT-6 materials have been synthesized and modified with iron salts by the wet impregnation method with different metal loadings. The different mesostructures obtained were characterized by N2 adsorption–desorption at 77 K, X-ray diffraction, temperature-programmed reduction, and ultraviolet–visible spectroscopy. These iron-containing mesostructured materials have been successfully tested for the heterogeneous photo-Fenton degradation of aqueous solutions of dangerous herbicides, such as atrazine, using UV–visible light irradiation, at room temperature and close to neutral pH. The results showed that the Fe/SBA-15 (10%) and Fe/KIT-6 (5%) catalysts exhibited the highest activities. However, the Fe/KIT-6 (5%) catalyst with minor Fe loading than Fe/SBA-15 (10%) presented a higher degradation of atrazine (above 98% in a reaction time of 240 min). Therefore, the interconnectivity of the cage-like mesopores had an important influence on the catalytic activity, favoring probably mass-transfer effects. Thus, the high performance of these materials indicates that the heterogeneous via of photo-Fenton process can also be efficiently employed to treat wastewaters containing pollutants such as herbicides, in order to reduce them to simplest and less toxic molecules.
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Acknowledgments
The authors are grateful to Universidad Tecnológica Nacional (UTN-FRC), Universidad Nacional del Litoral (UNL), Universidad Nacional de San Luis (UNSL), Consejo Nacional de Investigaciones Científicas (CONICET), and Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT) for the financial support.
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This work was supported by Universidad Tecnológica Nacional (UTN-FRC) (MAUTICO0004427TC), Consejo Nacional de Investigaciones Científicas (CONICET) (PIP 112–2013-0100412), and Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT) (PICT-2015-1485 and PICT 2015-2651).
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Responsible editor: Vítor Pais Vilar
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Benzaquén, T.B., Barrera, D.A., Carraro, P.M. et al. Nanostructured catalysts applied to degrade atrazine in aqueous phase by heterogeneous photo-Fenton process. Environ Sci Pollut Res 26, 4192–4201 (2019). https://doi.org/10.1007/s11356-018-2348-9
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DOI: https://doi.org/10.1007/s11356-018-2348-9