Department of Chemical and Environmental Technology (ESCET), Universidad Rey Juan Carlos, C / Tulipán s/n, 28933, Móstoles, Madrid, Spain.
Plataforma Solar de Almería - CIEMAT, P.O. Box 22, 04200, Tabernas, Almería, Spain.
Water Res. 2020 Sep 15;183:116074. doi: 10.1016/j.watres.2020.116074. Epub 2020 Jun 20.
Sunlight can be an effective tool for inactivating pathogens in water disinfection processes. In clear water, photoinactivation of viruses is driven by the absorption of UVB radiation and it is more efficient at shorter wavelengths. Moreover, the temperature can significantly improve the efficiency of the process. To date, no kinetic model has been reported that describes the simultaneous thermal and spectral effects that occur during the solar inactivation of viruses. This work presents a novel comprehensive kinetic model for the solar inactivation of MS2 coliphage as a function of the water temperature, irradiance, and spectral distribution of the incident radiation. The model is based on a combination of the modified Arrhenius equation, a wavelength-dependent first-order inactivation model with the quantum yield, and thermal parameters estimated from laboratory data. Model predictions have a 9% error with respect to experiments in the temperature range from 30 to 50 °C and UV irradiance range from 15 to 50 W/m. Moreover, the model was validated in three scenarios using different plastic materials that modify the spectral range of the radiation reaching the water, confirming an accurate prediction of inactivation rates for real solar disinfection systems worldwide using containers made of any material.
阳光可以成为水消毒过程中有效消灭病原体的工具。在清澈的水中，病毒的光灭活作用是由 UVB 辐射的吸收驱动的，在较短的波长下效率更高。此外，温度可以显著提高该过程的效率。迄今为止，还没有报道描述在太阳灭活病毒过程中同时发生的热和光谱效应的动力学模型。本工作提出了一种新的综合动力学模型，用于描述 MS2 噬菌体作为水温、辐照度和入射辐射光谱分布函数的太阳灭活。该模型基于改进的 Arrhenius 方程、与量子产率相关的波长依赖性一阶失活动力学模型以及从实验室数据估计的热参数的组合。模型预测在 30 至 50°C 的温度范围和 15 至 50 W/m 的 UV 辐照度范围内相对于实验的误差为 9%。此外，该模型在三种不同的使用不同塑料材料的情况下进行了验证，这些材料改变了到达水的辐射光谱范围，证实了使用任何材料制成的容器在全球范围内对实际太阳能消毒系统的失活动率进行了准确预测。
