Acetaldehyde and formaldehyde concentrations from sites impacted by heavy-duty diesel vehicles and their correlation with the fuel composition: Diesel and diesel/biodiesel blends

► Formaldehyde and acetaldehyde emissions were related to fuel composition. ► Data from other sites impacted by heavy-duty vehicles were used for comparison. ► Two major groups were observed by using PCA. ► Addition of biodiesel to diesel showed an increase of carbonyl concentration profile.