RT Journal Article
T1 Kinetic modeling of the synergistic thermal and spectral actions on the inactivation of Cryptosporidium parvum in water by sunlight
A1 García Gil, Ángela
A1 Abeledo Lameiro, María Jesús
A1 Gómez Couso, Hipólito
A1 Marugán, Javier
K1 Solar water disinfection (SODIS)
K1 Household water treatment (HWT)
K1 Protozoa inactivation
K1 Quantum yield
K1 Extinction coefficient
K1 Water temperature
AB Water contamination with the enteroprotozoan parasite Cryptosporidium is a current challenge worldwide. Solar water disinfection (SODIS) has been proved as a potential alternative for its inactivation, especially at household level in low-income environments. This work presents the first comprehensive kinetic model for the inactivation of Cryptosporidium parvum oocysts by sunlight that, based on the mechanism of the process, is able to describe not only the individual thermal and spectral actions but also their synergy. Model predictions are capable of estimating the required solar exposure to achieve the desired level of disinfection under variable solar spectral irradiance and environmental temperature conditions for different locations worldwide. The thermal contribution can be successfully described by a modified Arrhenius equation while photoinactivation is based on a series-event mechanistic model. The wavelength-dependent spectral effect is modeled by means of the estimation of the C. parvum extinction coefficients and the determination of the quantum yield of the inactivation process. Model predictions show a 3.7% error with respect to experimental results carried out under a wide range of temperature (30 to 45 °C) and UV irradiance (0 to 50 W·m−2). Furthermore, the model was validated in three scenarios in which the spectral distribution radiation was modified using different plastic materials common in SODIS devices, ensuring accurate forecasting of inactivation rates for real conditions
PB Elsevier
SN 0043-1354
YR 2020
FD 2020
LK http://hdl.handle.net/10347/24217
UL http://hdl.handle.net/10347/24217
LA eng
NO Water Research, Volume 185, 15 October 2020, 116226
NO The authors gratefully acknowledge the financial support of the European Union's Horizon 2020 research and innovation program under WATERSPOUTT H2020-Water-5c-2015 project (GA 688928) and under PANIWATER project (GA 820718), jointly funded by the European Commission and the Department of Science and Technology of India (DST). Ángela García Gil also acknowledges Técnicas Reunidas for the economic support to finance her scholarship in Residencia de Estudiantes and Spanish Ministry of Education for her FPU grant (FPU17/04333)
DS Minerva
RD 24 abr 2026