The inactivation of the coliphage MS2 (a human virus indicator) by solar photo-Fenton at near neutralpH in carbonate buffer solution matrix was evaluated. The effects of reactant concentration (H2O2, Fe2+,Fe3+) and solar irradiance on the photo-Fenton process were studied. Specifically, the solar exposure/Fe3+treatment showed a strong dependence on the iron concentration and solar irradiance intensity leadingto complete inactivation (from 106 PFU mL−1 to the detection limit) with 1mg L−1 of Fe3+ and 60 minof solar irradiance (45Wm−2). The MS2 inactivation observed with the photo-Fenton process (solarexposure/H2O2/Fe2+/3+) carried out with Fe3+, was faster than with Fe2+ (detection limit achieved at 20 minand 50 min, respectively). Moreover, virus inactivation by photo-Fenton under different solar irradiancevalues (15, 30 and 45Wm−2),H2O2 and Fe3+ concentrations (0.1, 0.5 and 1mg L−1) and different pH values(6, 7 and 8) were evaluated. In order to validate the efficiency of the photo-Fenton process at near neutralpH on virus inactivation, the photocatalytic treatment was carried out in natural water (Lake Geneva,Switzerland) and with a human virus (Echovirus). Finally, a conceptual mechanistic interpretation wasproposed regarding how solar photo-Fenton acts on viruses in water, involving the key species Fe2+, Fe3+,H2O2, solar irradiance, organic matter, and their possible reactions and interactions.
- Neutral pH
- Virus inactivation
- Natural water
Ortega-Gómez, E., Ballesteros Martín, M. M., Carratalà, A., Fernandez-Ibanez, P., Sánchez Pérez, J. A., & Pulgarín, C. (2015). Principal parameters affecting virus inactivation by the solar photo-Fenton process at neutral pH and μM concentrations of H2O2 and Fe2+/3+. Applied Catalysis B: Environmental, 174-17, 395-402. https://doi.org/10.1016/j.apcatb.2015.03.016