engleski

Fine aerosol pollution in Rijeka

X ray fluorescence (XRF) technique has been used to provide multi-elemental analysis of fine particulate matter PM2.5 (aerodynamic diameter ≤ 2.5 μm) of aerosols collected in the City of Rijeka. Sampling was performed by means of ANSTO’s fine aerosol sampling unit. Since this is the first time such samples were collected and analysed in this region, our aim was to identify elements and their concentrations that are characteristic for the road traffic, with the aim to identify so called road traffic fingerprint. To achieve this goal, we have set our sampler at two different sites. The first site was based at the residential area (within the new University campus, Trsat, in September 2011) as this site has the expected very low traffic loading. Samples were collected in 24 hours periods during 9 days. The other site was at a very busy road in the City centre. Due to heavy loadings at this site, samples were collected in 12 hours periods. To enable easier identification of the traffic fingerprint samples were collected during day time (high traffic density) and night time (low traffic density) for 9 days in February and in March 2012. Our preliminary results show large differences in concentrations of elements at the two monitored sites. The concentrations of Cu, Pb, Cr, Fe, Zn, K and Ti in fine fraction of aerosols in the city centre area are found to be 4 and more times higher than in the residential area out of centre. A summary of our findings is presented and discussed in this paper.

aerosols; air pollution; XRF; fine particulate matter PM2.5

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