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Accueil du site → Doctorat → Royaume-Uni → 2022 → Air pollution climatology of particulate matter in Dammam, Saudi Arabia : composition, sources and toxicity

University of Birmingham (2022)

Air pollution climatology of particulate matter in Dammam, Saudi Arabia : composition, sources and toxicity

Alwadei, Manna M

Titre : Air pollution climatology of particulate matter in Dammam, Saudi Arabia : composition, sources and toxicity

Auteur : Alwadei, Manna M

Université de soutenance : University of Birmingham

Grade : Doctor of Philosophy (PhD) 2022

Résumé
Air pollution in many countries is the largest environmental health stressor on their populations. Investigating key air pollutant sources, their properties and processes of formation in different environments is key to understanding how to implement mitigation strategies appropriately in those countries. The world is rapidly urbanising, leading to larger emissions, burning of fossil fuels and thus increasing air pollution. At present one of the main pollutants of concern in urban centres is particles less than 2.5µm in diameter (PM 2.5 ). This thesis investigates the air quality in Dammam, Saudi Arabia, including assessment of the air pollution climatology in Dammam using monitoring data from two stations for the period 2016-2019, and primary measurement of particulate matter (PM 2.5 ) composition, sources and toxicity. PM 2.5 was collected on Teflon and quartz filters in the winter and summer from two locations in Dammam.

PM 2.5 mass concentration and composition were mainly influenced by crustal elements derived primarily from desert and dust storms. Average PM 2.5 mass concentrations doubled in the summer compared to the winter and were (on average) three times higher during dust storms than non-dust storm periods. In general, the mean concentrations of most of chemical components of PM were higher in the summer than in the winter. The impact of dust storms on PM 2.5 composition was studied. This analysis showed that dust storms increased the concentration of crustal species in PM 2.5 by five times, compared to non-dust samples. The mean concentration of organic carbon (OC) was significantly higher during dust storms. The influence of dust storms on most anthropogenic species in PM was limited. Secondary aerosols and OC were the most abundant components of PM 2.5 in Dammam, under non-dust periods.

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Page publiée le 20 janvier 2023