165103 20251212165958.0 doi 10.1016/j.watres.2020.115636 sideral 117174 ART-2020-117174 eng Mosteo, Rosa Universidad de Zaragoza (orcid)0000-0002-7456-4912 Visible light plays a significant role during bacterial inactivation by the photo-fenton process, even at sub-critical light intensities 2020 The aim of this research is to clarify the contribution of sunlight wavelengths, irradiance and Fe2+/H2O2 during bacterial disinfection by the photo-Fenton process in clear surface waters. We considered different solar spectrum distributions (visible, UVA-Visible), sub-critical irradiances (0–400 W/m2), focusing on the action modes of E. coli inactivation by the constituents involved in the composite process, at low µM reactants concentration (Fe2+/H2O2) in in ultrapure (MQ) water. We report that solar disinfection improved with Fenton reagents (photo-Fenton process) is a reality from very low light irradiance values (200 W/m2), and made possible even without the presence of UVA radiation, even when using low quantities of the Fenton reagents (0.5 mg/L Fe2+, 5 mg/L H2O2). Under light exposure, H2O2 was found to augment the intracellular Fenton process and Fe2+ to initiate further, distinct oxidative actions. Finally, validation was performed in Lake Geneva water over a wider irradiance range, where the photo-Fenton process was found to be reagent-dependent in low irradiance, shifting to light-driven in the higher values. info:eu-repo/grantAgreement/ES/DGA-FEDER/T51-17R info:eu-repo/grantAgreement/ES/MCIU/RYC2018-024033-I info:eu-repo/grantAgreement/ES/MICINN/PRX18/00107 info:eu-repo/semantics/closedAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 11.236 2020 ENGINEERING, ENVIRONMENTAL 3 / 53 = 0.057 2020 Q1 T1 WATER RESOURCES 2 / 97 = 0.021 2020 Q1 T1 ENVIRONMENTAL SCIENCES 6 / 273 = 0.022 2020 Q1 T1 3.099 2020 Civil and Structural Engineering 2020 Q1 Ecological Modeling 2020 Q1 Water Science and Technology 2020 Q1 Pollution 2020 Q1 Waste Management and Disposal 2020 Q1 Environmental Engineering 2020 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Varon Lopez, A. Muzard, D. Benitez, N. Giannakis, S. Pulgarin, C. 5005 790 Universidad de Zaragoza Dpto. Ing.Quím.Tecnol.Med.Amb. Área Tecnologi. Medio Ambiente 174 (2020), 115636 [14 pp.] Water res. WATER RESEARCH 0043-1354 1342448 http://zaguan.unizar.es/record/165103/files/texto_completo.pdf Versión publicada 2643720 http://zaguan.unizar.es/record/165103/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:165103 articulos driver 2025-12-12-14:42:43 ARTICLE