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Identifier 000438355
Title Επίδραση της οξύτητας της ατμόσφαιρας στη διαλυτότητα μετάλλων και θρεπτικών στα ατμοσφαιρικά αερολύματα : παρατηρήσεις και θεωρητικοί υπολογισμοί
Alternative Title Effect of atmospheric acidity on the solubility of metals and nutrients in aerosols: observations and theoretical calculations
Author Νικολάου, Παναγιώτα Νικ
Thesis advisor Κανακίδου, Μαρία
Reviewer Μιχαλόπουλος, Νικόλαος
Περγαντής, Σπυρίδων
Βρεκούσης, Μιχάλης
Μυριοκεφαλιτάκης, Στέλιος
Σπύρος, Απόστολος
Τρικαλίτης, Παντελής
Abstract The aim of this study is to investigate the role of air masses and their sources in the quality of air in the Eastern Mediterranean Area and more specifically in Finokalia, Crete. The study focuses on the effect of atmospheric acidity on the solubility of metals and nutrients in atmospheric aerosols and on the chemical processes between natural (dust) and man-made emissions in the atmosphere, in order to assess their impact on atmospheric deposition in the oceans. To achieve this, atmospheric aerosols and dust samples were collected. Aerosols’ sampling was carried out in Finokalia, Crete, where the Environmental Measurement Station of Environmental and Chemical Processes Laboratory (ECPL) is operating. Particles of two sizes were taken. In the main sampling, PM10 suspended particles were collected on quartz and teflon filters, from October 2012 to March 2015. Also, PM1 suspended particles were collected on quartz filters from October 2012 to November 2013. PM10 samples were analyzed for ionic and metals composition using ion chromatography and inductively coupled plasma (ICP-OES) spectroscopy, respectively. At the same time, the determination of soluble forms of nutrients (Fe and P) was carried out, in order to study the contribution of various natural and man-made sources, , to their atmospheric deposition and consequently to their bioavailability in the marine ecosystem. The results of the present work were compared with the results obtained from the subsidiary sampling that took place in Corsica, France. Factor Analysis was applied to our results for the confirmation of the emission sources. Moreover, the ionic composition of PM1particles was determined with the use of ion chromatography. The water content and the acidity of particles were also calculated. The sampling of dust took place in Heraklion, Crete, at an altitude of 20m for 11 months (October 2012 - November 2013). The dust samples were analyzed for ionic and metal composition. They were further processed appropriately and assessed for soluble forms of Fe and P at different acidity values. The results of the solubility experiments were used to explain the chemical aging of dust in the atmosphere and how it affects the solubility of its components. A key factor for better understanding the processes and parameters affecting the concentrations and the solubility of nutrients in atmospheric deposition in the Eastern Mediterranean was the investigation of the effect of air masses and their source of origin as calculated by the NOAA Hysplit Model (Hybrid Single - Particle Langrangian Integrated Trajectory), in parallel with the determination of the acidity of aerosols using the thermodynamic model ISORROPIA II.
Language Greek
Subject Acidity
Atmospheric aerosols
Dust
Eastern Mediterranean
Nutrients
Solubility
Ανατολική Μεσόγειος
Ατμοσφαιρικά αερολύματα
Διαλυτότητα
Θρεπτικά συστατικά
Οξύτητα
Σκόνη
Issue date 2022-06-27
Collection   School/Department--School of Sciences and Engineering--Department of Chemistry--Doctoral theses
  Type of Work--Doctoral theses
Permanent Link https://elocus.lib.uoc.gr//dlib/f/c/5/metadata-dlib-1615896779-976583-11005.tkl Bookmark and Share
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