The main objective of the participation in RI-URBANS is the source apportionments of particulate matter (PM) in industrial, mining, urban, and rural areas using near online high-resolution chemical composition of metals using X-Ray Fluorescence methodology: 1. Characterization of the chemical composition of hourly metals in representative areas of the SW of the Iberian Peninsula. 2. Evaluation of the hour, daily, weekly, and monthly variations of PM. 3. Quantify the source apportionments using high- and low-resolution chemical analysis of PM using PMF5.