期刊
JOURNAL OF ENVIRONMENTAL MONITORING
卷 13, 期 3, 页码 732-742出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0em00535e
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资金
- Istituto Superiore per la Protezione e la Ricerca Ambientale (ISPRA) under the ISPRA-CESPRO (Universita di Firenze) [04/3/7359]
From February 15(th) to April 15(th) 2009, a period characterised by two episodes of Saharan dust outbreaks in Italy, particulate matter (PM) samples were collected at two stations (urban and suburban) in Rome. Some samples were selected and analysed using the SEM-EDS technique to characterise PM, focussing especially on the mineral contribution. Samples were representative both of days affected by Saharan dust episodes and days without this contribution. Cluster analysis allowed the attribution of each of about 67 000 analysed particles to one of the seven main statistical groups based on their composition. Characteristics of the particulate components identified using SEM-EDS analysis were verified by PIXE analysis carried out on filters collected in a suburban area. Ultimately, the contribution of crustal particles was revealed to be consistently high, highlighting the importance of local and regional mineral contributions, as well as those of Saharan origin. Therefore, quantifying all mineral contributions to resuspended particulate could lead to significant reductions of the PM level also on days not influenced by Saharan dust, thus limiting conditions when PM10 daily limit value (DLV) established by European legislation is exceeded.
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