Pollution sources affecting the oxidative potential of fine aerosols in a Portuguese urban-industrial area - an exploratory study
Rattachement africain : pt, it. Niveau de preuve : code pays fourni par la source.
Le résumé fourni par la source
Abstract This study targets to determine the oxidative potential (OP) of fine aerosols in an urban-industrial area of the Lisbon Metropolitan Area (Portugal) and, in addition, to identify which pollution sources may have an impact on the OP levels of fine aerosols. For this purpose, thirty samples were selected from a set of 128 samples collected over one year (Dec 2019-Nov 2020), based on the highest load for each source (both mass and %) previously assessed by source apportionment studies (using Positive Matrix Factorisation, a total of 7 different sources were identified: soil, secondary sulphate, fuel-oil combustion, sea, vehicle non-exhaust, vehicle exhaust and industry). The OP associated with the water-soluble components of PM2.5 was assessed using the dithiothreitol (DTT) method. The samples had a mean DTT activity (normalised to the mass) of 12.9 ± 6.6 pmol min− 1 µg− 1, ranging from 3.5 to 31.8 pmol min− 1 µg− 1. The DTT activity (normalised to the volume, $${\text{O}\text{P}}_{\text{V}}^{\text{D}\text{T}\text{T}}$$ ) showed to have a significant positive association with PM2.5 levels (R2 = 0.714). Considering that the mass contributions of the different sources to the PM2.5 levels were known, Spearman correlations were assessed and significant correlations were found between $${\text{O}\text{P}}_{\text{V}}^{\text{D}\text{T}\text{T}}$$ and three different sources: vehicle exhaust (ρ = 0.647, p-value = 0.001), fuel-oil combustion (ρ = 0.523, p-value = 0.012) and industry (ρ = 0.463, p-value = 0.018). Using a multiple linear regression analysis, these three sources were found to explain 82% of the variability in $${\text{O}\text{P}}_{\text{V}}^{\text{D}\text{T}\text{T}}$$ , with vehicle exhaust being the most influential source.
Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.
Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Pollution sources affecting the oxidative potential of fine aerosols in a Portuguese urban-industrial area - an exploratory study
- Date Crossref
- 05/04/2024
- Éditeur
- Springer Science and Business Media LLC
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
-
University of Lisbon pays non établi dans la noticeUniversité ou école supérieure
-
Centro de Ciências e Tecnologias Nucleares pays non établi dans la noticeStructure de recherche
-
HyLab Green Hydrogen Collaborative Laboratory pays non établi dans la noticeInstitution
-
Universidade Politécnica de Setúbal pays non établi dans la noticeUniversité ou école supérieure
-
University of Salento Department of Biological and Environmental Sciences and Technologies - DiSTeBA pays non établi dans la noticeUniversité ou école supérieure
-
Institute of Atmospheric Sciences and Climate pays non établi dans la noticeStructure de recherche
-
Universidade de Lisboa Instituto Superior Técnico pays non établi dans la noticeUniversité ou école supérieure
-
Instituto Politécnico de Setúbal pays non établi dans la noticeStructure de recherche
University of Lisbon, Centro de Ciências e Tecnologias Nucleares et HyLab Green Hydrogen Collaborative Laboratory, avec 5 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.