Comparison of stationary and personal air sampling with an air dispersion model for children's ambient exposure to manganese

Florence Fulk, Erin N. Haynes, Timothy J. Hilbert, David Brown, Dan Petersen, Tiina Reponen

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

Manganese (Mn) is ubiquitous in the environment and essential for normal growth and development, yet excessive exposure can lead to impairments in neurological function. This study modeled ambient Mn concentrations as an alternative to stationary and personal air sampling to assess exposure for children enrolled in the Communities Actively Researching Exposure Study in Marietta, OH. Ambient air Mn concentration values were modeled using US Environmental Protection Agency's Air Dispersion Model AERMOD based on emissions from the ferromanganese refinery located in Marietta. Modeled Mn concentrations were compared with Mn concentrations from a nearby stationary air monitor. The Index of Agreement for modeled versus monitored data was 0.34 (48 h levels) and 0.79 (monthly levels). Fractional bias was 0.026 for 48 h levels and-0.019 for monthly levels. The ratio of modeled ambient air Mn to measured ambient air Mn at the annual time scale was 0.94. Modeled values were also time matched to personal air samples for 19 children. The modeled values explained a greater degree of variability in personal exposures compared with time-weighted distance from the emission source. Based on these results modeled Mn concentrations provided a suitable approach for assessing airborne Mn exposure in this cohort.

Original languageEnglish
Pages (from-to)494-502
Number of pages9
JournalJournal of Exposure Science and Environmental Epidemiology
Volume26
Issue number5
DOIs
StatePublished - Sep 1 2016

Bibliographical note

Funding Information:
This work was supported by funding from National Institute of Environmental Health Sciences (1R01 ES016531) and NIEHS (1RO1 ES016531 and P30ES006096).

Publisher Copyright:
© 2016 Nature America, Inc.

Keywords

  • AERMOD
  • Ambient
  • Children
  • Manganese
  • Modeling
  • Sampling

ASJC Scopus subject areas

  • Epidemiology
  • Toxicology
  • Pollution
  • Public Health, Environmental and Occupational Health

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