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Appraisal of water matrix on the removal of fungicide residues by heterogeneous photocatalytic treatment using UV-LED lamp as light source

  • Advanced Oxidation/Reduction Technologies: An Perspective from Iberoamerican Countries
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Abstract

In this study, the photocatalytic degradation of four fungicides, myclobutanil, penconazole and difenoconazole (triazole compounds) and boscalid (carboxamide), has been examined in different aqueous matrices (tap water, irrigation water and two WWPT effluents). Experiments were conducted at laboratory scale with different reagents—zinc oxide (ZnO), titanium dioxide (TiO2), sodium persulphate (Na2S2O8) and the combined systems ZnO/Na2S2O8 and TiO2/Na2S2O8—in water exposed to UV-LED irradiation. Previously, the effect of catalyst and oxidant loading on the disappearance kinetics of the different fungicides was assessed to know maximum degradation efficiency. The influence of water matrices and pesticide loading in removal effectiveness has been evaluated. It was observed a greater efficiency in processes conducted using the tandems ZnO/Na2S2O8 and TiO2/Na2S2O8 in irrigation and tap waters. Results showed that UV-LED are a suitable alternative for tackling the removal of organic pollutants in water.

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Acknowledgements

The authors are also grateful to H. Jiménez, J. Cava, I. Garrido, M.V. Molina and E. Molina and for technical assistance.

Funding

The authors acknowledge financial support received the project “Regeneration of contaminated water by pesticides using solar photocatalysis for its use in irrigation of horticultural crops” (RTA2015-00073-00-00, INIA 2017-2020) and with the aid of the Resolution of Presidency of State Research Agency, which approves the call, corresponding to 2017, of grants for pre-doctoral contracts for the training of doctors contemplated in the State Subprogram of Training of State Program of Promotion of Talent and its Employability, within the framework of the State Plan for Scientific and Technical Research and Innovation 2013-2016. Co-funded by the European Social Fund.

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Marina Aliste: investigation; Gabriel Pérez-Lucas: investigation; Pilar Flores: investigation; Pilar Hellín: investigation; Simón Navarro: investigation; Isabel Garrido: investigation, writing first-draft; José Fenoll: investigation, writing first-draft.

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Correspondence to Isabel Garrido or José Fenoll.

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Responsible Editor: Vítor Pais Vilar

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Aliste, M., Garrido, I., Pérez-Lucas, G. et al. Appraisal of water matrix on the removal of fungicide residues by heterogeneous photocatalytic treatment using UV-LED lamp as light source. Environ Sci Pollut Res 28, 23849–23858 (2021). https://doi.org/10.1007/s11356-020-11560-y

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  • DOI: https://doi.org/10.1007/s11356-020-11560-y

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