Determination of PM₁₀ deposition based on antimony flux to selected urban surfaces
2011
Langner, Marcel | Kull, Martin | Endlicher, Wilfried R.
Deposition of PM₁₀ particles to several types of urban surfaces was investigated within this study. Antimony was chosen as a tracer element to calculate dry deposition velocities for PM₁₀, since antimony proved to be present almost exclusively in PM₁₀ particles in ambient urban air. During 18 months, eight sampling sites in Berlin and Karlsruhe, two cities in Germany, were operated. PM₁₀ concentrations and dry deposition were routinely sampled as two week averages. Additionally, leaf-samples were collected at three sites with tall vegetation. The obtained deposition velocities ranged from 0.8 to 1.3cms⁻¹ at roadside sites and from 0.4 to 0.5cms⁻¹ at the other sites. With reference to the whole canopy, additional deposition velocities of about 0.5cms⁻¹ were obtained for leaf surfaces. As a consequence, it can be concluded that vegetation-covered areas beside streets show the highest potential to capture particles in urban areas.
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