A multi-approach monitoring of particulate matter, metals and PAHs in an urban street canyon
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For the first time until now, the results from a prediction model (Atmospheric Dispersion Modelling System (ADMS)-Road) of pollutant dispersion in a street canyon were compared to the results obtained from biomonitors. In particular, the instrumental monitoring of particulate matter (PM10) and the biomonitoring of 14 polycyclic aromatic hydrocarbons (PAHs) and 11 metals by Quercus ilex leaves and Hypnum cupressiforme moss bags, acting as long- and short-term accumulators, respectively, were carried out. For both PAHs and metals, similar bioaccumulation trends were observed, with higher concentrations in biomonitors exposed at the leeward canyon side, affected by primary air vortex. The major pollutant accumulation at the leeward side was also predicted by the ADMS-Road model, on the basis of the prevailing wind direction that determines different exposure of the street canyon sides to pollutants emitted by vehicular traffic. A clear vertical (3, 6 and 9 m) distribution gradient of pollutants was not observed, so that both the model and biomonitoring results suggested that local air turbulences in the street canyon could contribute to uniform pollutant distribution at different heights.
KeywordsMoss bags Holm oak leaves Pollutant dispersion model PAHs Metals Naples urban area
The authors wish to thank Assessorato Ambiente del Comune di Napoli and ANEA (Agenzia Napoletana Energia e Ambiente) for their support during monitoring campaign. The authors gratefully thank also Ivana Imperatore, the IPSIA Colosimo and the inhabitants living in Santa Teresa street who made the moss bag exposure possible. This work was financially supported by MIUR (PRIN 2007–2007AH8KT8).
- Adamo P, Bargagli R, Giordano S, Modenesi P, Monaci F, Pittao E, Spagnuolo V, Tretiach M (2008) Natural and pre-treatments induced variability in the chemical composition and morphology of lichens and mosses selected for active monitoring of airborne elements. Environ Pollut 152:11–19CrossRefGoogle Scholar
- Adamo P, Giordano S, Sforza A, Bargagli R (2011) Implementation of airborne trace element monitoring with devitalised transplants of Hypnum cupressiforme Hedw.: assessment of temporal trends and element contribution by vehicular traffic in Naples City. Environ Pollut 159:1620–1628CrossRefGoogle Scholar
- Directive 2008/50/EC of the European Parliament and of the Council of 21 May 2008 on ambient air quality and cleaner air for Europe. Official Journal of the European Union L 152, 1–44, 11/6/2008.Google Scholar
- European Commission (2004) PARTICULATES Characterisation of exhaust particulate emissions from road vehicles, Deliv. 8. Measurement of non-exhaust particulate matterGoogle Scholar
- Harmens H, Foan L, Simon V, Mills G (2013) Terrestrial mosses as biomonitors of atmospheric POPs pollution: a review. Environ Pollut 173:245–254Google Scholar
- Hertel O, Berkowicz R, Larssen S (1990) The operational street pollution model (OSPM). In: Van Dop H, Steyn DG (Eds.) 18th International Meeting of NATO/CCMS on Air Pollution Modelling and its Application, vol 15. Canada, pp 741–749Google Scholar
- Murena F (2012) Monitoring and modelling carbon monoxide concentrations in a deep street canyon: application of a two-box model. Atmos Pollut Res. doi: 10.5094/APR.2012.034
- Vitiello C (2011) Modellazione dei livelli di concentrazione di monossido di carbonio in uno street canyon con ADMS-Roads. Tesi di Laurea in Ingegneria Chimica, Università degli Studi di Napoli “Federico II”, NapoliGoogle Scholar