Size distribution and lung-deposited doses of particulate matter from household exposure to biomass smoke

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Exposure to high concentrations of particulate matter (PM) is associated with a number of adverse health effects. However, it is unclear which aspects of PM are most hazardous, and a better understanding of particle sizes and personal exposure is needed. We characterized particle size distribution (PSD) from biomass-related pollution and assessed total and regional lung-deposited doses using multiple-path deposition modeling. Gravimetric measurements of kitchen and personal PM2.5 (<2.5 µm in size) exposures were collected in 180 households in rural Puno, Peru. Direct-reading measurements of number concentrations were collected in a subset of 20 kitchens for particles 0.3-25 µm, and the continuous PSD was derived using a nonlinear least-squares method. Mean daily PM2.5 kitchen concentration and personal exposure was 1205 ± 942 µg/m3 and 115 ± 167 µg/m3, respectively, and the mean mass concentration consisted of a primary accumulation mode at 0.21 µm and a secondary coarse mode at 3.17 µm. Mean daily lung-deposited surface area (LDSA) and LDSA during cooking were 1009.6 ± 1469.8 µm2/cm3 and 10,552.5 ± 8261.6 µm2/cm3, respectively. This study presents unique data regarding lung deposition of biomass smoke that could serve as a reference for future studies and provides a novel, more biologically relevant metric for exposure-response analysis compared to traditional size-based metrics.

Original languageEnglish (US)
Pages (from-to)51-62
Number of pages12
JournalIndoor Air
Volume31
Issue number1
DOIs
StatePublished - Jan 2021

Keywords

  • biomass fuels
  • cookstoves
  • environmental exposure
  • indoor air pollution
  • lung deposition
  • particle size distribution

ASJC Scopus subject areas

  • Environmental Engineering
  • Building and Construction
  • Public Health, Environmental and Occupational Health

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