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| Titel |
PM1 geochemical and mineralogical characterization using SEM-EDX to identify particle origin – Agri Valley pilot area (Basilicata, southern Italy) |
| VerfasserIn |
S. Margiotta, A. Lettino, A. Speranza, V. Summa |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1561-8633
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| Digitales Dokument |
URL |
| Erschienen |
In: Natural Hazards and Earth System Sciences ; 15, no. 7 ; Nr. 15, no. 7 (2015-07-17), S.1551-1561 |
| Datensatznummer |
250119599
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| Publikation (Nr.) |
 copernicus.org/nhess-15-1551-2015.pdf |
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| Zusammenfassung |
| A PM1 geochemical and mineralogical study using Scanning Electron
Microscopy (SEM) was performed on a pilot site in the Agri Valley which is
close to the oil pre-treatment plant (C.O.V.A) of Europe's largest
on-shore hydrocarbon reservoir. The study identified PM1 geochemical
and mineralogical characters in the period before, during and immediately
after a burning torch flare event. The finer fraction (DFe < 0.7 μm)
consisted mainly of secondary particles and soot. In the
coarser fraction (DFe ≥ 0.7 μm), natural particles
originating from crustal erosion and soot were abundant. Fine quartz
particles and lower Al / Si ratios are markers for desert dust origin, proving
that a Saharan dust episode which occurred during the observation period
played a significant role in supplying geogenic aerosol components to the
PM1. Largest amounts of ≥ 0.7 μm fraction particles observed
on the day of flare event may be due to a greater supply of Saharan geogenic
particles. Soot had been significantly increasing long before the flare
event, suggesting that this increase is also related to other causes,
although we cannot exclude a contribution from flaring. S-rich aerosol
consisted mainly of mixed particles originating from deposition and
heterogeneous nucleation of secondary sulfates on mineral dust. Only-S
particles were identified in the ≥ 0.7 μm fraction following the
flare event. These particles may be indicators of larger amounts of sulphur
in the atmosphere. |
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