Graduate theses
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Current Record: 6 of 1658
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| Title |
Προσδιορισμός ανθρακούχων συστατικών (OC και EC) σε αερολύματα περιοχής υποβάθρου της Ανατολικής Μεσογείου |
| Alternative Title |
Carbonaceous aerosols (OC and EC) at a background location in the Eastern Mediterranean |
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Author
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Μεντάκη, Χρυσάνθη
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Thesis advisor
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Μιχαλόπουλος, Νικόλαος
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| Abstract |
The chemical composition of atmospheric particulate matter in the Eastern Mediterranean region, where most of the mass of both organic and elemental carbon consists of particles in the accumulation region, with the organic aerosols that end up in this region being predominantly secondary, has attracted scientific interest. Therefore, this paper focuses on the study of the organic and elemental carbon fraction of aerosols in the atmosphere of the Eastern Mediterranean for the period from May 2022 to January 2024. Specifically, particulate matter samples were analysed from two different sampling stations, from the environmental station of Finokalias in Lasithi and from the new environmental station in the city of Heraklion. Their analysis was performed using a thermal/optical carbon analyser for aerosols from Sunset Laboratory Inc. The aim of the present study is to characterize the new station in order to obtain a more complete picture of the new area of Heraklion, through the study of the levels of organic and elemental carbon fraction of particulate matter. For this reason, the experimental data are compared with the corresponding time series available for the Finokalias station. From the Finokalias station, the concentrations of organic carbon (OC) measured during the period averaged (1.39 ± 0.85) μg/m3 and ranged from 0.16 to 5.32 μg/m3 , while for elemental carbon (EC) the average concentration was (0.21 ± 0.11) μg/m3 and ranged from 0.02 to 1.01 μg/m3 . From the Heraklion station, respectively, OC concentrations averaged (4.00 ± 1.50) μg/m3 and ranged from 1.87 to 9.78 μg/m3 , while the mean EC concentration was (1.06 ± 0.64) μg/m3 with concentrations ranging from 0.31 to 3.96 μg/m3 . The ΔOC (2.58 ± 0.89) μg/m3 and respectively the ΔEC (1.57 ± 0.69) μg/m3 for Heraklion were also calculated. Through comparison with the Finokalias station, which we already know to be representative of background conditions for the Eastern Mediterranean region, the Heraklion station, which was studied for the first time, was characterized as indicative of urban traffic. In particular, high EC concentrations indicate increased anthropogenic activity near the area, and high OC concentrations are attributed to both transported particulate matter from remote areas and local sources.
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| Language |
Greek |
| Issue date |
2024-07-19 |
| Collection
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School/Department--School of Sciences and Engineering--Department of Chemistry--Graduate theses
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Type of Work--Graduate theses
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| Permanent Link |
https://elocus.lib.uoc.gr//dlib/8/d/9/metadata-dlib-1720505158-773614-26524.tkl
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| Views |
2 |
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