IRIS Institutional Research Information System - AIR Archivio Istituzionale della Ricerca
IRIS è il sistema di gestione integrata dei dati della ricerca (persone, progetti, pubblicazioni, attività) adottato dall'Università degli Studi di Milano.
AIR nasce in UNIMI nel 2006 con lo scopo di raccogliere, documentare e conservare le informazioni sulla produzione scientifica dell'Università degli Studi di Milano e costituisce di fatto l'Anagrafe della ricerca dell'Ateneo.
EnglishWeekly measurements of 210Pb activity concentration on aerosol particles were performed at ground level in outdoor air in Milan (Italy) during the years 2000-2001. The experimental method was based on the delayed alpha spectrometry of in-grown 210Po activity detected on airborne particles collected on a filter support. On the same filter the 214Pb activity concentration was also measured during the sampling. 210Pb weekly concentration values showed a great variability and the average monthly values exhibited a seasonal pattern characterised by maxima in winter and minima in spring-summer. The same seasonal trend was also observed in 214Pb concentration values. 210Pb average yearly values were 0.70 and 0.82 mBq/m3 in 2000 and 2001, respectively, in good agreement with literature data registered at continental sites of similar latitude and longitude. The activity ratio 210Pb/214Pb was used to evaluate the residence time of fine aerosols in the urban air of Milan, which was 1-2 days.
| Titolo: | Seasonal variation of Pb-210 activity concentration in outdoor air of Milan (Italy) |
| Autori: | VECCHI, ROBERTA (Primo) MARCAZZAN, GRAZIA (Secondo) VALLI, GIANLUIGI (Ultimo) |
| Parole Chiave: | 210Pb activity concentration; Radioactive aerosols; Residence time of aerosols |
| Settore Scientifico Disciplinare: | Settore FIS/07 - Fisica Applicata(Beni Culturali, Ambientali, Biol.e Medicin) |
| Data di pubblicazione: | 2005 |
| Rivista: | |
| Tipologia: | Article (author) |
| Digital Object Identifier (DOI): | 10.1016/j.jenvrad.2004.12.008 |
| Appare nelle tipologie: | 01 - Articolo su periodico |
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