With the collaboration of the Traffic Division of the City Council, as well of the Municipal Police, a road dust sampling campaign was conducted on several streets of Porto and in a road tunnel (Avenida da Liberdade). The sampling device developed by Fulvio Amato was used to collect PM10 samples. These filters have been analysed by a thermal-optical method to obtain their carbonaceous content and by inductively coupled plasma techniques to get the elemental speciation. The “dust chemical profiles” will be useful to better estimate the contribution of resuspension to ambient PM10 levels.
The following table summarises the work carried out, between the 9th of May and the 1st of July 2014: