Articles | Volume 15, issue 12
https://doi.org/10.5194/amt-15-3859-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-15-3859-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
29 Jun 2022
Research article |
| 29 Jun 2022
| 29 Jun 2022
Substantial organic impurities at the surface of synthetic ammonium sulfate particles
Aix Marseille Univ, CNRS, LCE, Marseille, France
Nicolas Brun
Aix Marseille Univ, CNRS, LCE, Marseille, France
Juan Miguel González-Sánchez
Aix Marseille Univ, CNRS, LCE, Marseille, France
Badr R'Mili
Aix Marseille Univ, CNRS, LCE, Marseille, France
Brice Temime Roussel
Aix Marseille Univ, CNRS, LCE, Marseille, France
Sylvain Ravier
Aix Marseille Univ, CNRS, LCE, Marseille, France
Jean-Louis Clément
Aix-Marseille Univ, CNRS, ICR, Marseille, France
Anne Monod
CORRESPONDING AUTHOR
Aix Marseille Univ, CNRS, LCE, Marseille, France
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Juan Miguel González-Sánchez, Nicolas Brun, Junteng Wu, Julien Morin, Brice Temime-Roussel, Sylvain Ravier, Camille Mouchel-Vallon, Jean-Louis Clément, and Anne Monod
Atmos. Chem. Phys., 21, 4915–4937, https://doi.org/10.5194/acp-21-4915-2021, https://doi.org/10.5194/acp-21-4915-2021, 2021
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Organic nitrates play a crucial role in air pollution as they are considered NOx reservoirs. This work lights up the importance of their reactions with OH radicals in the aqueous phase (cloud/fog, wet aerosol), which is slower than in the gas phase. For compounds that significantly partition in water such as polyfunctional biogenic nitrates, these aqueous-phase reactions should drive their atmospheric removal, leading to a broader spatial distribution of NOx than previously accounted for.
Evangelia Kostenidou, Alvaro Martinez-Valiente, Badr R'Mili, Baptiste Marques, Brice Temime-Roussel, Amandine Durand, Michel André, Yao Liu, Cédric Louis, Boris Vansevenant, Daniel Ferry, Carine Laffon, Philippe Parent, and Barbara D'Anna
Atmos. Chem. Phys., 21, 4779–4796, https://doi.org/10.5194/acp-21-4779-2021, https://doi.org/10.5194/acp-21-4779-2021, 2021
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Passenger vehicle emissions can be a significant source of particulate matter in urban areas. In this study the particle-phase emissions of seven Euro 5 passenger vehicles were characterized. Changes in engine technologies and after-treatment devices can alter the chemical composition and the size of the emitted particulate matter. The condition of the diesel particle filter (DPF) plays an important role in the emitted pollutants.
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Short summary
This work quantified and tentatively identified the organic impurities on ammonium sulfate aerosols generated in the laboratory. They are likely low volatile and high mass molecules containing oxygen, nitrogen, and/or sulfur. Our results show that these organic impurities likely originate from the commercial AS crystals. It is recommended to use AS seeds with caution, especially when small particles are used, in terms of AS purity and water purity when aqueous solutions are used for atomization.
This work quantified and tentatively identified the organic impurities on ammonium sulfate...
