Micropollutants in Urban Runoff from Traffic Areas: Target and Non-Target Screening on Four Contrasted Sites

Although runoff from trafficked urban areas is recognized as a potentially significant pathway of micropollutants, pollution remains poorly documented, except for relatively few historical pollutants such some metals and hydrocarbons. Therefore, in this work, road parking lot four sites with contrasting traffic levels were analyzed very broad spectrum molecules elements. A total 128 micropollutants monitored, including inorganic (n = 41) organic 87) pollutants. Both the dissolved particulate phases considered. For reduced number samples, non-targeted screening by high-resolution mass spectrometry (HRMS) was carried out. targeted screening, contamination profiles quite homogeneous, but concentrations significantly differed between different sites. Sites highest density exhibited polycyclic aromatic hydrocarbons (PAHs), traffic-related metals, alkylphenols phthalates. Overall, most lowest concentrations, specificity site confirmed its HRMS fingerprint. Non-target allowed to be discriminated based on occurrence specific compounds. Unlike results intra-site variability lower than inter-site variability. Unknown substances tentatively identified, either characteristic each or ubiquitous all samples.