Peer-Reviewed Journal Details
Mandatory Fields
Riva, M;Healy, RM;Tomaz, S;Flaud, PM;Perraudin, E;Wenger, JC;Villenave, E
2016
October
Atmospheric Environment
Gas and particulate phase products from the ozonolysis of acenaphthylene
Validated
WOS: 5 ()
Optional Fields
POLYCYCLIC AROMATIC-HYDROCARBONS SECONDARY ORGANIC AEROSOL FLIGHT MASS-SPECTROMETRY HYDROXYL RADICALS NITRATE RADICALS ALPHA-PINENE OH RADICALS OZONE KINETICS PHOTOOXIDATION
142
104
113
Polycyclic aromatic hydrocarbons (PAHs) are recognized as important secondary organic aerosol (SOA) precursors in the urban atmosphere. In this work, the gas-phase ozonolysis of acenaphthylene was investigated in an atmospheric simulation chamber using a proton transfer reaction time-of-flight-mass spectrometer (PTR-TOF-MS) and an aerosol time-of-flight-mass spectrometer (ATOFMS) for on-line characterization of the oxidation products in the gas and particle phases, respectively. SOA samples were also collected on filters and analyzed by ultra performance liquid chromatography/electrospray ionization high-resolution quadrupole time-of-flight mass spectrometry (UPLC/ESI-HR-QTOFMS) and gas chromatography/electron impact ionization-mass spectrometry (GC/EI-MS). The major gas-phase products included a range of oxygenated naphthalene derivatives such as 1,8-naphthalic anhydride, naphthalene 1,8-dicarbaldehyde and naphthaldehyde, as well as a secondary ozonide. Possible reaction mechanisms are proposed for the formation of these products and favoured pathways have been suggested. Many of these products were also found in the particle phase along with a range of oligomeric compounds. The same range of gas and particle phase products was observed in the presence and absence of excess cyclohexane, an OH scavenger, indicating that OH radical production from the ozonolysis of acenaphthylene is negligible. SOA yields in the range 23-37% were determined and indicate that acenaphthylene ozonolysis may contribute to part of the SOA observed in urban areas. (C) 2016 Elsevier Ltd. All rights reserved.
OXFORD
1352-2310
10.1016/j.atmosenv.2016.07.012
Grant Details