PARTICULATE MATTER (PM10 AND PM2.5) CONCENTRATIONS IN NATURALLY VENTILATED OFFICES IN BOR, SERBIA

Monitoring of particulate matter (PM) mass concentrations in indoor air are important for human health risk assessments, since most of the individuals in developed countries spend the majority of their time indoors. The mass concentrations of particulate matter (PM10 and PM2.5 fractions) were measured in several naturally ventilated offices and hallway in the Mining and Metallurgy Institute Bor, Serbia. The measurements are carried out with a portable, direct reading, aerosol monitoring device Turnkey OSIRIS. Several sampling campaigns were conducted in the time interval from 2009 to 2014 in the six selected offices and in a hallway near the main entrance. The average daily mass concentrations of PM in the offices during the summer period (April – September) were 21.9 mg/m3 for PM10 and 8.4 mg/m3 for PM2.5. The average daily mass concentrations of PM in the offices during the winter period (October – March) were 20.3 mg/m3 for PM10 and 10.9 mg/m3 for PM2.5. The indoor air quality seems satisfactory with respect to the both observed fractions of PM. Particle monitor used in the study proved to be practical for PM measurements in the indoor environments, as it is portable and quiet enough not to disturb occupants in the offices