The effects of NO2 and O3 exposure on the degradation of polycyclic aromatic hydrocarbons (PAH) during high-volume sampling of airborne particulate matter were studied. Addition of 1 ppm NO2 during ambient air sampling caused degradation of pyrene, benz(a)anthracene and benzo(a)pyrene, most probably due to nitration. Acid particles seem to enhance the reaction. The results indicate that NO2 concentrations within the range normally formed in urban air may cause degradation of some reactive PAH. Addition of 200 ppb O3 caused degradation in one of the three experiments only.
Medarbetare: Peringe Grennfelt
Nyckelord: polycyclic aromatic hydrocarbon, PAH, ambient air, identification, airborne particulate matter
Författare: Eva Brorström, Peringe Grennfelt, Anne Lindskog
Publicerad i: Atmospheric Environment 17(1983):3