Estimations of infiltration factors of diurnal PM2.5 and heavy metals in children’s bedrooms

Huey Jen Su, Chien Cheng Jung, Jui Hsin Wang, Nai Tzu Chen, Wei Hsiang Chang

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

Children are the sensitive population to fine particulate matter (PM2.5) exposure and spend most of their time in bedroom. Infiltration factor (Finf) can be used to calculate the fraction of total indoor PM2.5 with outdoor origin to increase the accuracy of exposure assessment. However, studies have ignored the diurnal variations of PM2.5 Finf values, and a few studies have estimated Finf values for heavy metals in PM2.5 in children’s bedrooms. To calculate the PM2.5 Finf, real-time indoor and outdoor PM2.5 concentrations and occupants’ activities were collected in 56 study bedrooms. At 22 of the 56 study bedrooms, PM2.5 samples were also collected for heavy metals analysis. We noted the PM2.5 Finf was higher during the daytime (0.70 ± 0.23) than nighttime (0.54 ± 0.27) during the hot season, and the time of air conditioner use was longer at nighttime. The largest Finf value of heavy metal was V (0.88 ± 0.25), followed by Pb (0.85 ± 0.28), Mn (0.72 ± 0.26), Cr (0.69 ± 0.35), and Zn (0.61 ± 0.32), with a larger variation. Our findings suggest that the estimations of diurnal PM2.5 and heavy metals Finf values are necessary to increase the accuracy of exposure assessment.

Original languageEnglish
Article numbere13037
JournalIndoor Air
Volume32
Issue number5
DOIs
Publication statusPublished - 2022 May

All Science Journal Classification (ASJC) codes

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

Fingerprint

Dive into the research topics of 'Estimations of infiltration factors of diurnal PM2.5 and heavy metals in children’s bedrooms'. Together they form a unique fingerprint.

Cite this