Abstract
The aim of this study was to measure the concentration of some metals (Cd, Cr, Cu, Fe, Mn, Ni, Pb, and Ti) in PM10 samples collected in one urban and one industrial site and to assess that PM10 total mass measurement may be not sufficient as air quality index due to its complex composition. Metals were determined by inductively coupled plasma-atomic emission spectroscopy (ICP-AES) and differential pulsed anodic stripping voltammetry (DPASV). The measured concentrations were used to calculate the content of metals in the PM10 total mass, and to estimate the enrichment factors and the correlations between PM10, metal concentrations and meteorological data for the two sites. The mean PM10 concentration during the sampling period in the urban site exceeded the annual European Union (EU) standard (40 µg/m3) and, for some sampling days, the daily EU standard (50 µg/m3) was also exceeded. In opposite, both EU standards were never exceeded in the industrial site. The overall metal content was nearly double in the industrial site compared to the urban one, and the mean Ni concentration exceeded the EU annual limit value (10 ng/m3). The metals with the highest enrichment factor were Cd, Cu, Ni and Pb for both sites, suggesting a dominant anthropogenic source for these metals. Metal concentrations were very low and typical of rural background during Christmas holidays, when factories were closed. PM10 total mass measurement is not a sufficient air quality index since the metal content of PM10 is not related to its total mass, especially in sites with industrial activities. This measurement should be associated with the analysis of toxic metals.
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Cozzi, F., Adami, G., Barbieri, P. et al. Is PM10 mass measurement a reliable index for air quality assessment? An environmental study in a geographical area of north-eastern Italy. Environ Monit Assess 144, 389–401 (2008). https://doi.org/10.1007/s10661-007-0002-y
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DOI: https://doi.org/10.1007/s10661-007-0002-y