Investigating the Impacts of Winds on SO2 Concentrations in Bor, Serbia

Air pollution is one of the most important environmental problems in the town of Bor, situated in the eastern of Serbia. The main source of air pollution with sulphur dioxide, heavy metals and other toxic and carcinogenic elements present in particulate matter (PM) and aero sediments is the Copper Mining and Smelting Complex Bor. The distribution of air pollutants is mainly determined by the copper smelter operation mode, as well as by meteorological parameters such as wind speed and direction. While information on air pollution with heavy metals and carcinogenic elements in the form of PM has been monitored and reported for longer period, availability of data related to the relationship between air pollutants and meteorological parameters in the Republic of Serbia is still limited. In the present study, the relationships between daily mean concentrations of SO2 and the speed and wind direction were analysed. The analysis includes data collected in 2011 from the four monitoring stations (Park, Jugopetrol, Institute, and Brezonik) situated in a wider town area. Pearson correlation coefficients between daily average SO2 and daily average speed and direction of winds are calculated. High wind speed reduces SO2 concentration due to the dilution effect. Hence, correlations between SO2 and the speed and direction of winds at almost all monitoring stations were negative, with one exception (Jugopetrol). This could be explained by the fact that winds, blowing from the north-west (NW) direction, carry polluted air towards this station. Moderate negative correlation found between SO2 and wind direction at monitoring station Park. Generally, the observed correlations between SO2 and wind speed and direction are weak, due to frequent changes in SO2 emissions, wind speed and direction during the day.