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Open AccessArticle

Seasonal Variations and Chemical Predictors of Oxidative Potential (OP) of Particulate Matter (PM), for Seven Urban French Sites

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Université Grenoble Alpes, CNRS, IRD, INP, IGE, 38 000 Grenoble, France
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Univ Savoie Mont-Blanc, LCME, F-73 000 Chambéry, France
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ANSES, 14 rue Pierre et Marie Curie, 94701 Maisons-Alfort CEDEX, France
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IFSTTAR, 69675 Bron, France
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INERIS, Parc Technologique ALATA BP2, 60 550 Verneuil en Halatte, France
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Laboratoire Central de Surveillance de la Qualité de l’Air (LCSQA), F-60550 Verneuil-en-Halatte, France
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Atmo Nouvelle-Aquitaine, ZA Chemin Long, 13 allée James Watt, 33692 Mérignac, France
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Atmo Auvergne Rhône-Alpes, 19 rue lac Saint André, Savoie Technolac, 73377 Le Bourget du Lac CEDEX, France
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Atmo Sud, route de la Vierge, 13500 Martigues, France
*
Author to whom correspondence should be addressed.
Atmosphere 2019, 10(11), 698; https://doi.org/10.3390/atmos10110698
Received: 20 September 2019 / Revised: 16 October 2019 / Accepted: 25 October 2019 / Published: 12 November 2019
(This article belongs to the Special Issue Oxidative Potential of Atmospheric Aerosols)
Epidemiological studies suggest that the main part of chronic effects from air pollution is likely to be linked with particulate matter (PM). Oxidative potential (OP) of PM is gaining strong interest as a promising health exposure metric. This study combined atmospheric detailed composition results obtained for seven different urban background environments over France to examine any possible common feature in OP seasonal variations obtained using two assays (acid ascorbic (AA) and dithiothreitol (DTT)) along a large set of samples ( N > 700 ). A remarkable homogeneity in annual cycles was observed with a higher OP activity in wintertime at all investigated sites. Univariate correlations were used to link the concentrations of some major chemical components of PM and their OP. Four PM components were identified as OP predictors: OC, EC, monosaccharides and Cu. These species are notably emitted by road transport and biomass burning, targeting main sources probably responsible for the measured OP activity. The results obtained confirm that the relationship between OP and atmospheric pollutants is assay- and location-dependent and, thus, the strong need for a standardized test, or set of tests, for further regulation purposes. View Full-Text
Keywords: oxidative potential; urban background sites; OP tracers/predictors; chemical composition of PM oxidative potential; urban background sites; OP tracers/predictors; chemical composition of PM
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Calas, A.; Uzu, G.; Besombes, J.-L.; Martins, J.M.; Redaelli, M.; Weber, S.; Charron, A.; Albinet, A.; Chevrier, F.; Brulfert, G.; Mesbah, B.; Favez, O.; Jaffrezo, J.-L. Seasonal Variations and Chemical Predictors of Oxidative Potential (OP) of Particulate Matter (PM), for Seven Urban French Sites. Atmosphere 2019, 10, 698.

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