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Source attribution of water-soluble organic aerosol by nuclear magnetic resonance spectroscopy

TitoloSource attribution of water-soluble organic aerosol by nuclear magnetic resonance spectroscopy
Tipo di pubblicazioneArticolo su Rivista peer-reviewed
Anno di Pubblicazione2007
AutoriDecesari, S., Mircea Mihaela, Cavalli F., Fuzzi S., Moretti F., Tagliavini E., and Facchini M.C.
RivistaEnvironmental Science and Technology
Parole chiaveaerosol, Aerosol sources, Aerosols, Air pollution, Analytical, anthropogenic source, article, atmosphere, Atmospheric aerosols, Biomass, biomass burning, chemistry, combustion, emission, geography, Magnetic Resonance Spectroscopy, Mixtures, Nuclear magnetic resonance spectroscopy, Organic Chemicals, organic compound, organic matter, Physicochemical property, pollutant source, pollutant transport, Pollution levels, proton nuclear magnetic resonance, sea, Spectroscopy, volatile organic compound, Volatile organic compounds

The functional group compositions of atmospheric aerosol water-soluble organic compounds were obtained employing proton nuclear magnetic resonance (1H NMR) spectroscopy in a series of recent experiments in several areas of the world characterized by different aerosol sources and pollution levels. Here, we discuss the possibility of using 1H NMR functional group distributions to identify the sources of aerosol in the different areas. Despite the limited variability of functional group compositions of atmospheric aerosol samples, characteristic 1H NMR fingerprints were derived for three major aerosol sources: biomass burning, secondary formation from anthropogenic and biogenic VOCs, and emission from the ocean. The functional group patterns obtained in areas characterized by one of the above dominant source processes were then compared to identify the dominant sources for samples coming from mixed sources. This analysis shows that 1H NMR spectroscopy can profitably be used as a valuable tool for aerosol source identification. In addition, compared to other existing methodologies, it is able to relate the source fingerprints to integral chemical properties of the organic mixtures, which determine their reactivity and their physicochemical properties and ultimately the fate of the organic particles in the atmosphere. © 2007 American Chemical Society.


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Citation KeyDecesari20072479