Estimation of occupational and nonoccupational nitrogen dioxide exposure for Korean taxi drivers using a microenvironmental model

Busoon Son, Wonho Yang, Patrick Breysse, Taewoong Chung, Youngshin Lee

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

Occupational and nonoccupational personal nitrogen dioxide (NO 2) exposures were measured using passive samplers for 31 taxi drivers in Asan and Chunan, Korea. Exposures were also estimated using a microenvironmental time-weighted average model based on indoor, outdoor and inside the taxi area measurements. Mean NO2 indoor and outdoor concentrations inside and outside the taxi drivers' houses were 24.7±10. 7 and 23.3±8.3ppb, respectively, with a mean indoor to outdoor NO 2 ratio of 1.1. Mean personal NO2 exposure of taxi drivers was 30.3±9.7ppb. Personal NO2 exposures for drivers were more strongly correlated with interior vehicle NO2 levels (r=0.89) rather than indoor residential NO2 levels (r=0.74) or outdoor NO2 levels (r=0.71). The main source of NO2 exposure for taxi drivers was considered to be occupational driving. Interestingly, the NO2 exposures for drivers' using LPG-fueled vehicles (26.3±1.3ppb) were significantly lower than those (38.1±1.3ppb) using diesel-fueled vehicle (P<0.01). Since drivers spent most of their time inside their vehicle and indoors at home, a microenvironmental model was used to estimate the personal NO2 exposure with indoor and outdoor NO2 levels of the residence, and interior vehicle NO2 levels (P<0.001). Some subpopulations, such as professional drivers, might be exposed to high NO2 levels because they drive diesel-using vehicles outdoors in Korea.

Original languageEnglish (US)
Pages (from-to)291-296
Number of pages6
JournalEnvironmental research
Volume94
Issue number3
DOIs
StatePublished - Mar 2004

Keywords

  • Exposure
  • Microenvironmental model
  • Nitrogen dioxide
  • Passive sampler
  • Taxi driver

ASJC Scopus subject areas

  • Biochemistry
  • Environmental Science(all)

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