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

Atmosphere

Matteo Redaelli¹  Guillaume Brulfert²  Boualem Mesbah³  Olivier Favez⁴  Alexandre Albinet⁴  Jean-Luc Besombes⁵  Florie Chevrier⁶  Samuël Weber⁶  Jean-Luc Jaffrezo⁶  Aude Calas⁶  JeanM.F. Martins⁶  Gaëlle Uzu⁶  Aurelie Charron⁶ 

[1] ANSES, 14 rue Pierre et Marie Curie, 94701 Maisons-Alfort CEDEX, France;Atmo Auvergne Rhône-Alpes, 19 rue lac Saint André, Savoie Technolac, 73377 Le Bourget du Lac CEDEX, France;Atmo Sud, route de la Vierge, 13500 Martigues, France;INERIS, Parc Technologique ALATA BP2, 60 550 Verneuil en Halatte, France;Univ Savoie Mont-Blanc, LCME, F-73 000 Chambéry, France;Université Grenoble Alpes, CNRS, IRD, INP, IGE, 38 000 Grenoble, France;

关键词: oxidative potential;    urban background sites;    op tracers/predictors;    chemical composition of pm;   

DOI  :  10.3390/atmos10110698

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown