Volume 15, No. 5, October 2015, Pages 2150-2157 PDF(776 KB)
Real-Time Measurements of Ozone and UV Radiation during Pyrotechnic Displays
Sandra Caballero, Nuria Galindo, Ramón Castañer, Joaquín Giménez, Javier Crespo
Atmospheric Pollution Laboratory (LCA), Department of Applied Physics, Miguel Hernández University, Avenida de la Universidad S/N, 03202 Elche, Spain
- 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.
Ozone formation; Fireworks; UV radiation; People exposure; Correlation analysis.