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Poster De Conférence Année : 2023

Assessment of the oxidative potential of fine particles PM2.5 according to their emission sources

Résumé

Fine particulate matter (PM2.5) present in the atmosphere are the subject of considerable attention from the scientific community and public authorities because of their proven impacts on climate and health. PM2.5 form a complex mixture of chemical compounds that can differ according to emission sources. In order to implement effective air quality management policies, a better knowledge of the sources that contribute to the concentration of air pollutants as well as the assessment of their respective effects on health is necessary. The objective of this study is to estimate the oxidative potential associated with the sources of fine particles that contribute to the ambient concentrations of PM2.5 in the Dunkirk area, located in the North of France. PM2.5 were collected on four sites influenced by urban, road traffic, industrial and rural emissions. PM2.5 from all four sites were chemically characterized, notably for the quantification of metal(oid)s, water-soluble ions, total carbon, and water-soluble organic compounds (Water-Soluble Organic Carbon (WSOC), Humic-Like Substances (HULIS), carboxylic acid, sugars, quinones as well as Polycyclic Aromatic Hydrocarbons (PAHs) Oxidative potential has been evaluated by acellular tests, namely the ascorbic acid assay (OP-AA) and the dithiothretol assay (OP-DTT). These methods were chosen because they are easy to use, inexpensive, have high repeatability and are complementary because they are not sensitive to the same chemical species and particle sources.
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Dates et versions

hal-04388268 , version 1 (11-01-2024)

Identifiants

  • HAL Id : hal-04388268 , version 1

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Yamina Allouche, Anthony Verdin, Marc Fadel, Frédéric Ledoux, Dominique Courcot. Assessment of the oxidative potential of fine particles PM2.5 according to their emission sources. SETAC Europe 33rd annual meeting, Apr 2023, Dublin, Ireland. ⟨hal-04388268⟩
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