查看文章

The primary aim of this study was to quantify the contribution of road dust to airborne particulate matter (PM₁₀) and evaluate the effects of street washing on the mitigation of resuspension. With this purpose an intensive campaign was carried out in a heavily trafficked central road of Madrid (Spain) including PM₁₀ sampling and chemical analysis. PM₁₀ daily levels during dry, unwashed conditions were 2–15% higher than those present during the day after nightly street washing. However, this reduction is lower than the standard deviation of the PM₁₀ measurements. The diurnal variation of PM₁₀ revealed that a reduction in PM₁₀ was noticeable only during the morning hours. The emission sources for the urban area of Madrid were resolved by means of a receptor model, Positive Matrix Factorization, PMF. The results showed that the main sources were vehicle emissions, road dust, secondary aerosol including …