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Real-Time Measurements of Ozone and UV Radiation during Pyrotechnic Displays

Category: Technical Note

Volume: 15 | Issue: 5 | Pages: 2150-2157
DOI: 10.4209/aaqr.2015.04.0204
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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

Highlights

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.


Abstract

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


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