Cite this article: Caballero, S., Galindo, N., Castañer, R., Giménez, J. and Crespo, J. (2015). Real-Time Measurements of Ozone and UV Radiation during Pyrotechnic Displays.
Aerosol Air Qual. Res.
15: 2150-2157. https://doi.org/10.4209/aaqr.2015.04.0204
O3, NOx, aerosols and radiation were measured during pyrotechnic exhibitions.
A significant positive correlation between ozone and UV irradiance was obtained.
The results suggest that O3 was formed from photolysis of O2 as in the stratosphere.
Real-time measurements of ozone, NOx, aerosols and radiation were performed very close to the launch area of high intensity pyrotechnic spectacles, the so-called Mascletàs, typical of celebrations in eastern Spain. During these events, a considerable number of spectators are potentially exposed to high concentrations of pollutants directly or indirectly produced by the ignition of thousands of firecrackers at ground-level. This work is focused on the mechanism of ozone formation throughout the Mascletàs. After the initial decrease in O3 levels (minimum concentration < 10 µg m–3) due to the reaction with NO emitted by fireworks explosions, peak concentrations of up to ~150 µg m–3 were recorded, clearly indicating that ozone was generated during these events. The results suggest that UV light produced by fireworks displays photolyzes O2 releasing O to form O3 as in the stratosphere.
Keywords: Ozone formation; Fireworks; UV radiation; People exposure; Correlation analysis