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Children's microenvironmental exposure to PM2.5 and ozone and the impact of indoor air filtration.

Publication ,  Journal Article
Barkjohn, KK; Norris, C; Cui, X; Fang, L; He, L; Schauer, JJ; Zhang, Y; Black, M; Zhang, J; Bergin, MH
Published in: Journal of exposure science & environmental epidemiology
November 2020

In highly polluted urban areas, personal exposure to PM2.5 and O3 occur daily in various microenvironments. Identifying which microenvironments contribute most to exposure can pinpoint effective exposure reduction strategies and mitigate adverse health impacts.This work uses real-time sensors to assess the exposures of children with asthma (N = 39) in Shanghai, quantifying microenvironmental exposure to PM2.5 and O3. An air cleaner was deployed in participants' bedrooms where we hypothesized exposure could be most efficiently reduced. Monitoring occurred for two 48-h periods: one with bedroom filtration (portable air cleaner with HEPA and activated carbon filters) and the other without.Children spent 91% of their time indoors with the majority spent in their bedroom (47%). Without filtration, the bedroom and classroom environments were the largest contributors to PM2.5 exposure. With filtration, bedroom PM2.5 exposure was reduced by 75% (45% of total exposure). Although filtration status did not impact O3, the largest contribution of O3 exposure also came from the bedroom.Actions taken to reduce bedroom PM2.5 and O3 concentrations can most efficiently reduce total exposure. As real-time pollutant monitors become more accessible, similar analyses can be used to evaluate new interventions and optimize exposure reductions for a variety of populations.

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Published In

Journal of exposure science & environmental epidemiology

DOI

EISSN

1559-064X

ISSN

1559-0631

Publication Date

November 2020

Volume

30

Issue

6

Start / End Page

971 / 980

Related Subject Headings

  • Particulate Matter
  • Ozone
  • Humans
  • Filtration
  • Epidemiology
  • Environmental Monitoring
  • Environmental Exposure
  • China
  • Child
  • Air Pollution, Indoor
 

Citation

APA
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ICMJE
MLA
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Barkjohn, K. K., Norris, C., Cui, X., Fang, L., He, L., Schauer, J. J., … Bergin, M. H. (2020). Children's microenvironmental exposure to PM2.5 and ozone and the impact of indoor air filtration. Journal of Exposure Science & Environmental Epidemiology, 30(6), 971–980. https://doi.org/10.1038/s41370-020-00266-5
Barkjohn, Karoline K., Christina Norris, Xiaoxing Cui, Lin Fang, Linchen He, James J. Schauer, Yinping Zhang, Marilyn Black, Junfeng Zhang, and Michael H. Bergin. “Children's microenvironmental exposure to PM2.5 and ozone and the impact of indoor air filtration.Journal of Exposure Science & Environmental Epidemiology 30, no. 6 (November 2020): 971–80. https://doi.org/10.1038/s41370-020-00266-5.
Barkjohn KK, Norris C, Cui X, Fang L, He L, Schauer JJ, et al. Children's microenvironmental exposure to PM2.5 and ozone and the impact of indoor air filtration. Journal of exposure science & environmental epidemiology. 2020 Nov;30(6):971–80.
Barkjohn, Karoline K., et al. “Children's microenvironmental exposure to PM2.5 and ozone and the impact of indoor air filtration.Journal of Exposure Science & Environmental Epidemiology, vol. 30, no. 6, Nov. 2020, pp. 971–80. Epmc, doi:10.1038/s41370-020-00266-5.
Barkjohn KK, Norris C, Cui X, Fang L, He L, Schauer JJ, Zhang Y, Black M, Zhang J, Bergin MH. Children's microenvironmental exposure to PM2.5 and ozone and the impact of indoor air filtration. Journal of exposure science & environmental epidemiology. 2020 Nov;30(6):971–980.

Published In

Journal of exposure science & environmental epidemiology

DOI

EISSN

1559-064X

ISSN

1559-0631

Publication Date

November 2020

Volume

30

Issue

6

Start / End Page

971 / 980

Related Subject Headings

  • Particulate Matter
  • Ozone
  • Humans
  • Filtration
  • Epidemiology
  • Environmental Monitoring
  • Environmental Exposure
  • China
  • Child
  • Air Pollution, Indoor