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Artificial O3 formation during fireworks
https://orcid.org/0000-0002-2561-2797
AbstractIn several previous studies emission of ozone (O3) during fireworks has been reported, which was attributed to either photolysis of molecular oxygen (O2) or nitrogen dioxide (NO2) by short/near UV radiation emitted during the high-temperature combustion of fireworks. In contrast, in the present study no O3 formation was observed using a selective O3-LOPAP instrument during the combustion of pyrotechnical material in the laboratory, while a standard O3 monitor using UV absorption showed extremely high O3 signals. The artificial O3 response of the standard O3 monitor was caused by known interferences associated with high levels of co-emitted VOCs and could also be confirmed in field measurements during New Year's Eve in the city of Wuppertal, Germany. The present results help to explain unreasonably high ozone levels documented during ambient fireworks, which are in contradiction to the fast titration of O3 by nitrogen monoxide (NO) in the night-time atmosphere.
Graphical abstract
HighlightsO3 emissions from fireworks proposed in former studies.Response of a standard O3 monitor against fireworks emissions confirmed.Results are inconsistent with the NOx chemistry of the atmosphere.Response explained by VOC interferences of standard O3 monitors.No O3 emissions from fireworks observed using a selective O3-LOPAP.
Artificial O3 formation during fireworks
https://orcid.org/0000-0002-2561-2797
AbstractIn several previous studies emission of ozone (O3) during fireworks has been reported, which was attributed to either photolysis of molecular oxygen (O2) or nitrogen dioxide (NO2) by short/near UV radiation emitted during the high-temperature combustion of fireworks. In contrast, in the present study no O3 formation was observed using a selective O3-LOPAP instrument during the combustion of pyrotechnical material in the laboratory, while a standard O3 monitor using UV absorption showed extremely high O3 signals. The artificial O3 response of the standard O3 monitor was caused by known interferences associated with high levels of co-emitted VOCs and could also be confirmed in field measurements during New Year's Eve in the city of Wuppertal, Germany. The present results help to explain unreasonably high ozone levels documented during ambient fireworks, which are in contradiction to the fast titration of O3 by nitrogen monoxide (NO) in the night-time atmosphere.
Graphical abstract
HighlightsO3 emissions from fireworks proposed in former studies.Response of a standard O3 monitor against fireworks emissions confirmed.Results are inconsistent with the NOx chemistry of the atmosphere.Response explained by VOC interferences of standard O3 monitors.No O3 emissions from fireworks observed using a selective O3-LOPAP.
Artificial O3 formation during fireworks
https://orcid.org/0000-0002-2561-2797
AbstractIn several previous studies emission of ozone (O3) during fireworks has been reported, which was attributed to either photolysis of molecular oxygen (O2) or nitrogen dioxide (NO2) by short/near UV radiation emitted during the high-temperature combustion of fireworks. In contrast, in the present study no O3 formation was observed using a selective O3-LOPAP instrument during the combustion of pyrotechnical material in the laboratory, while a standard O3 monitor using UV absorption showed extremely high O3 signals. The artificial O3 response of the standard O3 monitor was caused by known interferences associated with high levels of co-emitted VOCs and could also be confirmed in field measurements during New Year's Eve in the city of Wuppertal, Germany. The present results help to explain unreasonably high ozone levels documented during ambient fireworks, which are in contradiction to the fast titration of O3 by nitrogen monoxide (NO) in the night-time atmosphere.
Graphical abstract
HighlightsO3 emissions from fireworks proposed in former studies.Response of a standard O3 monitor against fireworks emissions confirmed.Results are inconsistent with the NOx chemistry of the atmosphere.Response explained by VOC interferences of standard O3 monitors.No O3 emissions from fireworks observed using a selective O3-LOPAP.
Artificial O3 formation during fireworks
Fiedrich, M. (author) / Kurtenbach, R. (author) / Wiesen, P. (author) / Kleffmann, J. (author)
Atmospheric Environment ; 165 ; 57-61
2017-06-15
5 pages
Article (Journal)
Electronic Resource
English
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