{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"omics_type":["Unknown"],"volume":["49"],"submitter":["Gamelas CA"],"pubmed_abstract":["The lockdowns held due to the COVID-19 pandemic conducted to changes in air quality. This study aimed to understand the variability of PM<sub>2.5</sub> levels and composition in an urban-industrial area of the Lisbon Metropolitan Area and to identify the contribution of the different sources. The composition of PM<sub>2.5</sub> was assessed for 24 elements (by PIXE), secondary inorganic ions and black carbon. The PM<sub>2.5</sub> mean concentration for the period (December 2019 to November 2020) was 13 ± 11 μg.m<sup>-3</sup>. The most abundant species in PM<sub>2.5</sub> were BC (19.9%), SO<sub>4</sub> <sup>2-</sup> (15.4%), NO<sub>3</sub> <sup>-</sup> (11.6%) and NH<sub>4</sub> <sup>+</sup> (5.3%). The impact of the restrictions imposed by the COVID-19 pandemic on the PM levels was found "],"journal":["Urban climate"],"pagination":["101446"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC9932663"],"repository":["biostudies-literature"],"pubmed_title":["Source apportionment of PM<sub>2.5</sub> before and after COVID-19 lockdown in an urban-industrial area of the Lisbon metropolitan area, Portugal."],"pmcid":["PMC9932663"],"pubmed_authors":["Canha N","Alves C","Almeida SM","Vicente A","Borges S","Silva A","Gamelas CA","Kertesz Z"],"additional_accession":[]},"is_claimable":false,"name":"Source apportionment of PM<sub>2.5</sub> before and after COVID-19 lockdown in an urban-industrial area of the Lisbon metropolitan area, Portugal.","description":"The lockdowns held due to the COVID-19 pandemic conducted to changes in air quality. This study aimed to understand the variability of PM<sub>2.5</sub> levels and composition in an urban-industrial area of the Lisbon Metropolitan Area and to identify the contribution of the different sources. The composition of PM<sub>2.5</sub> was assessed for 24 elements (by PIXE), secondary inorganic ions and black carbon. The PM<sub>2.5</sub> mean concentration for the period (December 2019 to November 2020) was 13 ± 11 μg.m<sup>-3</sup>. The most abundant species in PM<sub>2.5</sub> were BC (19.9%), SO<sub>4</sub> <sup>2-</sup> (15.4%), NO<sub>3</sub> <sup>-</sup> (11.6%) and NH<sub>4</sub> <sup>+</sup> (5.3%). The impact of the restrictions imposed by the COVID-19 pandemic on the PM levels was found ","dates":{"release":"2023-01-01T00:00:00Z","publication":"2023 May","modification":"2025-05-29T19:43:34.838Z","creation":"2025-04-05T18:34:36.484Z"},"accession":"S-EPMC9932663","cross_references":{"pubmed":["36820273"],"doi":["10.1016/j.uclim.2023.101446"]}}