Doctoral theses
Current Record: 27 of 230
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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
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Νικολάου, Παναγιώτα Νικ
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Thesis advisor
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Κανακίδου, Μαρία
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Reviewer
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Μιχαλόπουλος, Νικόλαος
Περγαντής, Σπυρίδων
Βρεκούσης, Μιχάλης
Μυριοκεφαλιτάκης, Στέλιος
Σπύρος, Απόστολος
Τρικαλίτης, Παντελής
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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.
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Language |
Greek |
Subject |
Acidity |
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Atmospheric aerosols |
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Dust |
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Eastern Mediterranean |
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Nutrients |
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Solubility |
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Ανατολική Μεσόγειος |
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Ατμοσφαιρικά αερολύματα |
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Διαλυτότητα |
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Θρεπτικά συστατικά |
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Οξύτητα |
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Σκόνη |
Issue date |
2022-06-27 |
Collection
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School/Department--School of Sciences and Engineering--Department of Chemistry--Doctoral theses
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Type of Work--Doctoral theses
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Permanent Link |
https://elocus.lib.uoc.gr//dlib/f/c/5/metadata-dlib-1615896779-976583-11005.tkl
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Views |
476 |
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