Passive Sampling to Capture Spatial Variability in PM10-2.5

Details

• Personal Author:
  Kumar N ; Ott DK ; Peters TM
• Description:
  This work applied inexpensive passive sampling to measure airborne coarse particles with aerodynamic diameters between 2.5 and 10 microm (PM10-2.5) over three 7-day periods at 33 sites in a medium-sized Midwest City (Iowa City, Iowa). The number of sites and their locations were selected using an optimal sampling design that captured 95% of the total variance in PM10-2.5 as measured with real-time sampling equipment on a mobile sampling platform. Weekly averages of PM10-2.5 were 15.9 microg m-3 (coefficient of variation between sites, CV = 23%), 17.9 microg m-3 (CV = 24%), and 6.1 microg m-3 (CV = 30%). ANOVA showed that these means were statistically different (p<0.001), and that the spatial variability plus random error accounted for 29% of the total variability. The maximum coefficient of divergence between sites - a relative measure of uniformity - ranged from 0.21 to 0.36. These values indicate that PM10-2.5 was heterogeneous even on the fine spatial resolution studied in this work (average distance between sites was 4.4 km). The spatial patterns of PM10-2.5 measured with the passive samplers closely matched with those of mobile mapping and corresponded with known coarse particle sources in the area. This work demonstrates that passive sampling coupled with effective sampling design may enhance our ability to assess exposure to PM10-2.5 at a local scale. Compared to exposure estimates made with data from centrally located, filter-based samplers, these highly spatially resolved estimates should reduce exposure misclassification errors in epidemiological studies. [Description provided by NIOSH]
• Subjects:
  Air Pollutants, Occupational Air Pollution Dust Environmental Monitoring Occupational Health Particulate Matter Safety
• Keywords:
  Airborne Particles Air Quality Measurement Air Sampling Equipment Air Sampling Techniques Author Keywords: Exposure Assessment Coarse Particles Exposure Assessment Measurement Equipment Mobile Equipment Particle Aerodynamics Particle Diameter Particulate Dust Particulate Matter Particulates Particulate Sampling Methods PM10-2.5 Respirable Dust Samplers Sampling Sampling Equipment Sampling Methods Spatial Variability

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• ISSN:
  1352-2310
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  Iowa ; OSHA Region 7
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Volume:
  42
• Issue:
  4
• NIOSHTIC Number:
  nn:20061955
• Citation:
  Atmos Environ 2008 Feb; 42(4):746-756
• Contact Point Address:
  Thomas M. Peters, Department of Occupational and Environmental Health, The University of Iowa, Iowa City, IA, USA
• Email:
  thomas-m-peters@uiowa.edu
• Federal Fiscal Year:
  2008
• Performing Organization:
  University of Iowa
• Peer Reviewed:
  True
• Start Date:
  20050701
• Source Full Name:
  Atmospheric Environment
• End Date:
  20290630
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:0a4abc8eec2a8416cff12a2dca73f3035d82a7f412c740c9caeb552e8ce537c1bd3c8c22479b6e1ff3e4882d6e73366b17568c162fd9a3eaf29eb0c92b645dd4
• Download URL:
  https://stacks.cdc.gov/view/cdc/225289/cdc_225289_DS1.pdf
• File Type:
  [PDF - 960.91 KB ]