| Autor: |
Gilden, R. C., Friedmann, E. J., Spanier, A. J., Hennigan, C. J. |
| Předmět: |
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| Zdroj: |
International Journal of Environmental Science & Technology (IJEST); Nov2022, Vol. 19 Issue 11, p11523-11530, 8p |
| Abstrakt: |
Head Start (HS) is a national program that provides subsidized early childhood education for 3- and 4-year olds. In this study, indoor particulate matter (PM2.5) and formaldehyde (HCHO) were characterized in 15 urban HS centers in Baltimore, MD. Median indoor concentrations of PM2.5 and HCHO were 15.1 µg m−3 and 42 µg m−3, respectively. Indoor PM2.5 concentrations were systematically higher than outdoor levels at a nearby regulatory monitoring station, as the median indoor/outdoor ratio in our study was 2.1. Time-resolved HCHO concentrations (30-min basis) were highly variable, ranging from below the instrument detection limit (< 12.5 µg m−3) to a maximum of 535 µg m−3 in one HS center. HCHO levels in 12 of the tests exceeded the World Health Organization (WHO) standard for short-term (100 µg m−3, 30-min) exposure. A notable mid-day spike in HCHO was frequently observed, which was likely associated with lunchtime preparation. Overall, this research adds to the relatively modest body of work on indoor air pollution exposure in early childhood education and child care environments. Exposures in these environments may be substantial, above WHO standards, highlighting the need for further studies of this kind. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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