In this paper, there are presented levels of twenty one elements (Ag, Al, As, B, Ba, Ca, Cd, Cr, Cu, Fe, K, Mg, Mn, Mo, Na, Ni, Pb, S, Se, Sr, and Zn) in PM10 and SO2 concentration measured at the sampling site in an urban area of the town of Bor (40000 inhabitants) in eastern Serbia. Sampling site was located in densely populated city center about 0.65 km far from one of the largest copper mine and cooper smelter in Europe. For the first time PM10 was collected using Europen standard sampler, during preliminar campaing in duration of 7 days in early spring 2009. PM10 were sampled on PTFE memebrane filters and element concentrations quantified by GF AAS and ICP AES. A concentration level and correlations within trace elements, PM10 and SO2 indicated that industrial activates underpinned with metrological conditions of slow wind speed (calm), are the main factors that influence air pollution in densely populated area. It was evident that both, PM10 mass concentration and SO2 concentration once exceeded daily limit values during measuring period of seven days. Strong relationship was found between PM10 and Mn, Mg, Ca and B daily average concentrations. On the other side, SO2 correlated strongly with As, Pb, Cd, Cu and S daily average concentrations. These results confirm relationship between emissions of SO2 from the Copper Smelter Bor, calm meteorological conditions (wind speed less than 0.5 m/sec) with concentration level of carcinogenic substances of arsenic, lead and cadmium in ambient air.

Indoor air quality (IAQ) is very important for children health and well-being, since children are particularly vulnerable and sensitive on presence of air pollutants. This study was performed in two naturally ventilated schools located in the same municipality. First school is located in urban area, at residential - industrial site, while the other school is situated in rural area. School buildings were chosen based on their urban environment features. The measurements were carried out in heating as well as in non-heating period in duration of five consecutive working days. The objective of the study was to analyze IAQ in the classrooms with special emphasis on levels and diurnal variations of particulate matter (PM10 and PM2.5), carbon dioxide (CO2) and nitrogen dioxide (NO2) in occupied and unoccupied school classrooms. In this paper, the CO2 concentrations were measured at both indoor and outdoor environments. Concentrations of CO2 higher than 1000 ppm were regularly detected in the classrooms during teaching hours. Indoor concentrations of PM10 were not exceeded the guideline, daily average, value of 50 ?g/m3. Concentrations of PM2.5 were exceeded the guideline, daily average, value of 25 ?g/m3 in both school during heating period. Concentrations NO2 were not exceeded the guideline value of 200 ?g/m3. Ventilation rates were calculated and compared with the prescribed limits. In both occupied and unoccupied periods high correlation between CO2 and PM concentrations was determined.

Mass concentrations of particulate matter (PM) fractions were measured in educational buildings in the city of Nis, Republic of Serbia. Two sampling campaigns were conducted in winter periods. The first campaign was in the period from 21 February to 15 April 2010 at the Faculty of Occupational Safety (FOS) and the second campaign was from 20 March to 4 April 2013 at the primary school Vozd Karadjordje (VK). PM measurements were carried out with low volume samplers Sven/Leckel LVS3. The average daily PM10 concentration inside the FOS (47.0 ?21.8 ?g/m3) was lower than PM10 concentration in outdoor air (50.7 ?28.1 ?g/m3). The average daily PM10 concentration inside the VK (54.6 ? 17.6 ?g/m3) was higher than in outdoor air (47.9 ? 22.8 ?g/m3). The 24 hours average PM10 concentrations at FOS exceeded the EU limit value (50 mg/m3) during 34 % of days outdoors, and 39 % of days indoors. The 24 hours average PM10 concentrations at VK exceeded the limit value during 35 % of days outdoors, and 53 % of days indoors. The 24 hours average PM2.5 concentrations at VK exceeded the WHO daily mean guideline value (25 mg/m3) during 71 % of days outdoors, and 88 % of days indoors. The average PM10 I/O ratio at VK was 1.57 during teaching hours, and 1.00 during no teaching hours. Similarly, average PM2.5 I/O ratio at VK was 1.11 during teaching hours and 0.90 during no teaching hours. Average daily PM2.5/PM10 ratio in the ambient air at VK was 0.87, and 0.82 at FOS. Very strong correlations between the indoor and outdoor PM concentrations were observed at VK during no teaching hours (r>0.8). Moderate to strong negative correlations were found between the wind speed and PM at both schools. High outdoor PM concentrations and resuspension of particles are probably the most possible reasons for the elevated indoor PM concentrations found in the study.