INDOOR AIR QUALITY IN RESIDENCES AT THE CITY OFKOZANI, GREECE: EFFECTS OF THE HOUSE LOCATION

摘要

Indoor air quality investigations were conducted in three residences at the city of Kozani, during winter 2011. The location of the three dwellings was different. The first residence was located near the city center, the second was located at the city center, and the last residence was located at the city suburbs. The weekly experimental campaign concerned the following pollutants: VOCs (BTEX, terpenes etc), carbonyl compounds (formaldehyde, acetaldehyde etc.) and NO2 using the passive sampling methodology with Radiello? passive samplers. Samples were placed at each residence at two indoor sites (bedroom and living room) and one outdoors. The results showed that carbonyl compounds have higher concentrations indoors with acetone and formaldehyde reaching the peak values. On the contrary, outdoor air hydrocarbons were at higher levels compared to carbonyls. The indoor/outdoor (I/O) ratios demonstrated that in some cases there were strong indoor sources especially for a-pinene, d-limonene formaldehyde and acetone. However the results for the house located at the city center demonstrate that outdoor air is mainly influencing the indoor air quality. Concerning NO2, which is mainly emitted by combustion sources and vehicle exhausts, the indoor and outdoor concentrations show the same variation trend and in one case the I/O ratio revealed significant indoor sources probably due to occupants cooking behaviors. Conclusively, the indoor air quality of a residence is highly affected by the location of the house.