Characterization of Water-Soluble Organic Matter in Urban Aerosol by (1)H-NMR Spectroscopy

Details

• Personal Author:
  Chalbot M-CG ; Chitranshi P ; da Costa GG ; Kavourasa IG ; Pollock E
• Description:
  The functional and 13C isotopic compositions of water-soluble organic carbon (WSOC) in atmospheric aerosol were determined by nuclear magnetic resonance (1H-NMR) and isotope ratio mass spectrometry (IRMS) in an urban location in the Southern Mississippi Valley. The origin of WSOC was resolved using the functional distribution of organic hydrogen, delta13C ratio, and positive matrix factorization (PMF). Three factors were retained based on NMR spectral bins loadings. Two factors (factors 1 and 3) demonstrated strong associations with the aliphatic region in the NMR spectra and levoglucosan resonances. Differences between the two factors included the abundance of the aromatic functional group for factor 1, indicating fresh emissions and, for factor 3, the presence of resonances attributed to secondary ammonium nitrate and low delta13C ratio values that are indicative of secondary organic aerosol. Factors 1 and 3 added 0.89 and 1.08 µgC m-3, respectively, with the highest contribution in the summer and fall. Factor 2 retained resonances consistent with saccharides and was attributed to pollen particles. Its contribution to WSOC varied from 0.22 µgC m-3 in winter to 1.04 µgC m-3 in spring. [Description provided by NIOSH]
• Subjects:
  Aerosols Atmosphere Fires Occupational Health Safety Wildfires
• Keywords:
  Author Keywords: Organic Aerosol Biomass Burning Environmental Impacts Magnetic Resonance Imaging Mass Spectrometry MRI NMR Organic Compounds Secondary Organic Aerosol
• ISSN:
  1352-2310
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Alabama ; Arkansas ; OSHA Region 4 ; OSHA Region 6
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  235-245
• Volume:
  128
• NIOSHTIC Number:
  nn:20050923
• Citation:
  Atmos Environ 2016 Mar; 128:235-245
• Contact Point Address:
  Ilias G. Kavouras, University of Alabama at Birmingham, Birmingham, AL 35216, United States
• Email:
  kavouras@uab.edu
• Federal Fiscal Year:
  2016
• Performing Organization:
  University of Alabama at Birmingham
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  Atmospheric Environment
• End Date:
  20270630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:3c2f19d2d3fc381b387f3a8685e06a076c81a13a0e9b405dbfa57f71bcb6864c99c77fcab4eb190b206dbcdbd42882781efa6f2f74e0277d172ac6f985516cb1
• Download URL:
  https://stacks.cdc.gov/view/cdc/211103/cdc_211103_DS1.pdf
• File Type:
  [PDF - 2.78 MB ]