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Chemical composition of fine and coarse aerosol particles in the Central Mediterranean area during dust and non-dust conditions

TitoloChemical composition of fine and coarse aerosol particles in the Central Mediterranean area during dust and non-dust conditions
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2015
AutoriMalaguti, Antonella, Mircea Mihaela, La Torretta Teresa M. G., Telloli C., Petralia Ettore, Stracquadanio Milena, and Berico M.
RivistaAerosol and Air Quality Research
Volume15
Paginazione410-425
ISSN16808584
Parole chiaveaerosol, Aerosol chemical composition, Aerosols, Carbonaceous species, Central Mediterranean, Chemical composition, Chemical compositions, Climate change, Dust, Dust concentrations, Elemental compositions, Italy, Mediterranean environment, pollutant transport, Saharan dust, Southern Italy
Abstract

A two-month field campaign was carried out from May to June 2010 at a remote site (Trisaia ENEA Research Centre) in the Southern Italy aiming to identify and quantify the changes of aerosol chemical composition in the presence of Saharan dust. The 24-hr PM10 and PM2.5 filter samples were analyzed by mass, carbonaceous species, inorganic ions and elemental composition. Saharan dust transport events were identified with two approaches: one recommended by EC (2011) and one based on indicators derived from measurements. Three indicators were used: PM2.5/PM10 mass concentrations ratio, Ca/Al ratio and Al concentration. Based on these criteria, four Saharan dust transport events were identified, but only one had elevated dust concentration and leaded to an exceedance of the European short-term (24 hour) limit value of 50 µg/m3 for PM10 (June 16 th). The comparison of chemical composition of fine and coarse aerosol fractions during dust and non-dust conditions shows that the presence of dust increases NH 4 and nssSO 4 concentrations in the fine fraction and NO3 and nssSO 4 concentrations in the coarse fraction. OC and EC concentrations also increase in the fine fraction during dust transport. The uptake of primary and secondary species, inorganic and organic, by dust particles changes their composition and, thus, their properties and this may have implications for human health and climate change. © 2015, Taiwan Association for Aerosol Research.

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URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-84925940259&doi=10.4209%2faaqr.2014.08.0172&partnerID=40&md5=401b61c24b440487655b074078bb6cc1
DOI10.4209/aaqr.2014.08.0172
Citation KeyMalaguti2015410