RT Journal Article
T1 Addition of hydrogen peroxide to natural ferruginous water improves the efficacy of SODIS method against the waterborne pathogen Cryptosporidium
A1 Reboredo Fernández, Aurora
A1 Abeledo Lameiro, María Jesús
A1 Couso Pérez, Seila
A1 Polo López, María Inmaculada
A1 Fernández Ibáñez, Pilar
A1 Ares Mazas, María Elvira
A1 Gómez Couso, Hipólito
K1 Natural ferruginous water
K1 Hydrogen peroxide
K1 Solar disinfection
K1 Photo-Fenton process
K1 Cryptosporidium parvum
AB The enhancement of SODIS method against the waterborne pathogen Cryptosporidium by incorporating H2O2 in natural ferruginous water (NFW) was evaluated. Polyethylene terephthalate bottles containing distilled water or different NFW with added different concentrations of H2O2 (0–100 mg L−1) were spiked with Cryptosporidium parvum oocysts and exposed to simulated and natural solar radiation. Oocyst viability was evaluated by induced excystation and inclusion/exclusion of the vital dye propidium iodide (PI). The experiments performed under sunlight showed better C. parvum inactivation rates than those under simulated solar radiation. Oocyst viability rates of 2.26±1.91% and 16.52±3.83% were determined by induced excystation and inclusion/exclusion of PI, respectively, after exposure to natural sunlight during 6 h in NFW with 100 mg L−1 of H2O2. This study proves the enhancement in the effectiveness of conventional SODIS by the addition of H2O2 to natural ferruginous waters, speeding up the C. parvum oocyst inactivation. Since surface waters in countries where the SODIS method can be used often contain dissolved iron salts, the addition of small amounts of H2O2 will increase the microbiological quality of drinking waters and consequently would decrease the risk of diarrhoeal diseases in the population, having a positive impact in terms of development and poverty reduction.
PB Elsevier
SN 2214-7144
YR 2024
FD 2024-11-29
LK https://hdl.handle.net/10347/40860
UL https://hdl.handle.net/10347/40860
LA eng
NO Reboredo-Fernández, A., Abeledo-Lameiro, M. J., Couso-Pérez, S., Polo-López, M. I., Fernández-Ibáñez, P., Ares-Mazás, E., & Gómez-Couso, H. (2025). Addition of hydrogen peroxide to natural ferruginous water improves the efficacy of SODIS method against the waterborne pathogen Cryptosporidium. Journal of Water Process Engineering, 69, 106559-. https://doi.org/10.1016/j.jwpe.2024.106559
NO This study was funding by Autonomous Government of Galicia (grants PR815A2014-12 and ED431C 2021/26).
DS Minerva
RD 24 abr 2026