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Polycyclic aromatic hydrocarbons and combustion aerosol photoemission

1990; Elsevier BV; Volume: 24; Issue: 12 Linguagem: Inglês

10.1016/0960-1686(90)90471-x

1878-2124

Stephen R. McDow, Walter Giger, H. Burtscher, A. Schmidt−Ott, Hans C. Siegmann,

Atmospheric chemistry and aerosols

An experimental investigation was conducted to explain the physical chemistry of aerosol photoemission (APE) from combustion sources. Strong correlations between APE and total polycyclic aromatic hydrocarbons (TPAH) in particulate matter were observed for aerosols from both oil stove and automobile exhaust. Sampling and analytical procedures were developed to allow detection of PAHs ranging in molecular weight (MW) from phenanthrene (MW 178) to coronene (MW 300) in oil stove exhaust after short sampling periods. Small variations of the oil stove PAH profile with Bacharach number were observed. Interactions between adsorbed polycyclic aromatic hydrocarbons PAHs and particle surface are proposed as the most likely cause of environmental APE after irradiation at 4.9 eV.