Publication details

Wet deposition and scavenging efficiency of gaseous and particulate phase polycyclic aromatic compounds at a central European suburban site



Year of publication 2011
Type Article in Periodical
Magazine / Source Atmospheric Environment
MU Faculty or unit

Faculty of Science

Field Environment influence on health
Keywords Wet deposition; Scavenging; Rainwater pollution; PAH
Description The concentration of 15 3-6-ring polycyclic aromatic hydrocarbons (PAHs) in atmospheric precipitation was monitored over 18 months in the years 2006-2008, using an automatic wet-only sampler at a suburban site in Brno, Czech Republic. The PAH concentration in rainwater varied between 2.8 and 571 ng L(-1) and the volume weighted mean was 93 ng L(-1) with fluoranthene, pyrene, phenanthrene and benzo(b)fluoranthene contributing most. The contribution of particle-associated PAH (sum of 15) to the wet deposition flux was by average 51%, 82% in summer and 47% in winter. The median total (gas and particulate) scavenging ratios, W(t) (m(3) L(-1)), varied between 450 for acenaphthene and 3.1 x 10(4) for fluoranthene. Estimates of the scavenged fraction in the column of air subject to precipitation suggest that typically only a few percent or less of the airborne PAHs are washed out during a precipitation event.
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