| Keywords |
Indoor air quality; Public facilities; Volatile organic compound; Aldehyde |
| Abstract |
This research was conducted to quantify hazardous substances in indoor air from various public facilities with sensitive populations, including daycare centers, medical institutions, and elderly care facilities from March 2021 to October 2021, located in Gwangju city, South Korea. Measured air pollutants include: PM10, PM2.5, CO2, CO, total airborne bacteria(TAB), 43 different volatile organic compounds(VOCs), and 7 different aldehydes. The measured air pollutants were found in the following average concentrations 18.3 μg/m3 of PM10, 11.7 μg/m3 of PM2.5, 596 ppm of CO2, 18.7 μg/m3 of formaldehyde, 0.9 ppm of CO, and 212 CFU/m3 of TAB. The average VOCs concentrations of toluene, m,p-xylene, ethylbenzene, styrene, o-xylene were 37.8 μg/m3, 12.7 μg/m3, 10.0 μg/m3, 4.9 μg/m3, 4.7 μg/m3, respectively. d-limonene, 1-butanol, octane, heptane, butyl acetate, and hexane were also detected. The average total volatile organic compounds(TVOCs) concentration was found to be 293.8 μg/m3 for daycare centers, 357.4 μg/m3 for medical institutions and 262.9 μg/m3 for elderly care facilities. For aldehydes, formaldehyde and acetaldehyde concentrations were 18.7 μg/m3 and 12.4 μg/m3, respectively. |