Characterization of primary organic aerosol emissions from meat cooking, trash burning, and motor vehicles with high-resolution aerosol mass spectrometry and comparison with ambient and chamber observations.
Organic aerosol (OA) emissions from motor vehicles, meat-cooking and trash burning are analyzed here using a high-resolution aerosol mass spectrometer (AMS). High resolution data show that aerosols emitted by combustion engines and plastic burning are dominated by hydrocarbon-like organic compounds. Meat cooking and especially paper burning emissions contain significant fractions of oxygenated organic compounds; however, their unit-resolution mass spectral signatures are very similar to those from ambient hydrocarbon-like OA, and very different from the mass spectra of ambient secondary or oxygenated OA (OOA). Thus, primary OA from these sources is unlikelyto be a significant direct source of ambient OOA. There are significant differences in high-resolution tracer m/zs that may be useful for differentiating some of these sources. Unlike in most ambient spectra, all of these sources have low total m/z 44 and this signal is not dominated by the CO2+ ion. All sources have high m/z 57, which is low during high OOA ambient periods. Spectra from paper burning are similar to some types of biomass burning OA, with elevated m/z 60. Meat cooking aerosols also have slightly elevated m/z 60, whereas motor vehicle emissions have very low signal at this m/z.
Mohr
Claudia
C
Cooperative Institute for Research in the Environmental Sciences, Department of Chemistry and Biochemistry, University of Colorado, Boulder, USA.
Huffman
Alex
A
Cubison
Michael J
MJ
Aiken
Allison C
AC
Docherty
Kenneth S
KS
Kimmel
Joel R
JR
Ulbrich
Ingrid M
IM
Hannigan
Michael
M
Jimenez
Jose L
JL
D000336:Aerosols / Q000032:analysis*; D003296:Cooking; D017745:Incineration; D013058:Mass Spectrometry / Q000379:methods*; D008460:Meat; D001335:Vehicle Emissions / Q000032:analysis*
D000336:Aerosols; D001335:Vehicle Emissions