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Caracterização química de matéria particulada (PM2.5) em ambientes interiores de sono: Teor em iões inorgânicos solúveis em água – Identificação de fontes poluidoras

2025Dissertação de mestrado Acesso aberto
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dc.contributor.authorFerreira, António Luís Pimentel
dc.contributor.institutionFaculdade de Ciências
dc.contributor.institutionDepartamento de Química e Bioquímica
dc.contributor.supervisorOliveira, Cristina Maria Roque Ramiro de
dc.contributor.supervisorGamelas, Carla A.
dc.date.accessioned2026-02-06T15:55:03Z
dc.date.available2026-02-06T15:55:03Z
dc.date.issued2025
dc.descriptionTese de mestrado, Química (Química), 2025, Universidade de Lisboa, Faculdade de Ciências
dc.description.abstractIndoor air quality has significant impacts on human health, potentially during sleep periods. This study focused on the chemical characterization of PM2.5 in air samples collected during the night in 30 sleeping rooms in the Lisbon Metropolitan Area, with the objective of quantifying the content of watersoluble inorganic ions and doing source apportionment. Samples were collected overnight, both indoors and outdoors, and were subsequently analyzed by ion-exchange chromatography. The results showed that, on average, soluble inorganic ions and black carbon constituted 23.6% and 18.9% of the PM2.5 mass, respectively, leaving a large portion of the particle’s mass uncharacterized. The chemical profiles indoors and outdoors were similar, suggesting a strong influence from external sources. Principal component analysis (PCA) identified three main sources for particulate matter: marine aerosols, secondary sulfate aerosols, and road emissions (both indoors and outdoors). Chloride to sodium ion ratios measured in the exterior suggests aerosol aging. A significant difference (α = 5%) in oxidative potential was observed between the indoor and outdoor environments, which indicates the presence of other polluting sources not identified in this study. This highlights the need for future investigations to characterize the remaining mass of the particulate matter to identify other sources.en
dc.formatapplication/pdf
dc.identifier.tid204174473
dc.identifier.urihttp://hdl.handle.net/10400.5/116899
dc.language.isopor
dc.subjectPM2.5
dc.subjectIndoor air quality
dc.subjectSource apportionment
dc.subjectIon-exchange chromatography
dc.subjectOvernight sampling
dc.titleCaracterização química de matéria particulada (PM2.5) em ambientes interiores de sono: Teor em iões inorgânicos solúveis em água – Identificação de fontes poluidoraspt
dc.typemaster thesis
dspace.entity.typePublication
rcaap.rightsopenAccess

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