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Atmospheric Chemistry and Physics An interactive open-access journal of the European Geosciences Union
https://doi.org/10.5194/acp-2017-1053
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.
Research article
02 Jan 2018
Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Atmospheric Chemistry and Physics (ACP).
An apportionment method for the Oxydative Potential to the atmospheric PM sources: application to a one-year study in Chamonix, France
Samuël Weber1, Uzu Gaëlle1, Aude Calas1, Florie Chevrier1,2, Jean-Luc Besombes2, Aurélie Charron1,3, Dalia Salameh1, Irena Ježek4, Griša Močnik4,5, and Jean-Luc Jaffrezo1 1Univ. Grenoble Alpes, CNRS, IRD, IGE (UMR 5001), F-38000 Grenoble, France
2Univ. Savoie Mont-Blanc, LCME, F-73 000 Chambéry, France
3IFFSTAAR, F-69675 Bron, France
4Aerosol d.o.o., Kamniška 41, 1000 Ljubljana, Slovenia
5Jožef Stefan Institute, Jamova 39, SI-1000 Ljubljana, Slovenia
Abstract. The particulate matter (PM) induces cellular oxidative stress in vivo and so lead to adverse health outcome. The oxidative potential (OP) of the PM appears to be a more relevant proxy of the health impact of the aerosol rather than the total mass concentration. However, the relative contributions of the emission’s sources of aerosols to the OP are still poorly known. In order to better quantify the impact of each PM source to the air quality, we sampled aerosols in a French city for one year (year 2014, 115 samples). A coupled analysis with detailed chemical speciation (more than 100 species, including organic and carbonaceous compounds, ions, metals and aethalomether measurements) and two OP assays (ascorbic acid (AA) and dithiothreitiol (DTT)) in a simulated lung fluid (SLF) were performed in these samples. We developed in this study a new statistical model using a coupled approach with Positive Matrix Factorisation (PMF) and multiple linear regressions to attribute a redox-activity per PM sources. Our results highlight the importance of the Biomass burning and Vehicular sources to explain the observed OP for both assays. In general, we see a different contribution of the sources when considering the OP AA, OP DTT or the mass of the PM10. Moreover, some significant differences are observed between the DTT and AA tests that emphasized the chemical specificities of the two tests and the need of a standardized approach for the future studies on epidemiology or toxicology of the PM.

Citation: Weber, S., Gaëlle, U., Calas, A., Chevrier, F., Besombes, J.-L., Charron, A., Salameh, D., Ježek, I., Močnik, G., and Jaffrezo, J.-L.: An apportionment method for the Oxydative Potential to the atmospheric PM sources: application to a one-year study in Chamonix, France, Atmos. Chem. Phys. Discuss., https://doi.org/10.5194/acp-2017-1053, in review, 2018.
Samuël Weber et al.
Samuël Weber et al.
Samuël Weber et al.

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Short summary
The oxidative potential (OP) of the PM appears to be a relevant proxy of health outcomes from PM exposure. We developed a new statistical model using a coupled approach with Positive Matrix Factorisation (PMF) and multiple linear regressions to attribute a redox-activity per PM sources. Our results highlight the importance of the Biomass burning and Vehicular sources to explain the observed OP of PM. A different contribution of the sources is observed when considering OP or the mass of the PM10.
The oxidative potential (OP) of the PM appears to be a relevant proxy of health outcomes from PM...
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