title: First assessment of the PM10 and PM2.5 particulate level in the ambient air of Belgrade city.
abstract: BACKGROUND
  As the strong negative health effect of exposure to the inhalable particulate matter PM10 in the urban environment has been confirmed, the study of the mass concentrations, physico-chemical characteristics, sources, as well as spatial and temporal variation of atmospheric aerosol particles becomes very important.
  
  
  OBJECTIVE
  This work is a pilot study to assess the concentration level of ambient suspended particulate matter, with an aerodynamic diameter of less than 10 microm, in the Belgrade central urban area. Average daily concentrations of PM10 and PM2.5 have been measured at three representative points in the city between June 2002 and December 2002. The influence of meteorological parameters on PM10 and PM2.5 concentrations was analyzed, and possible pollution sources were identified.
  
  
  METHODS
  Suspended particles were collected on Pure Teflon filters by using a Mini-Vol low-volume air sampler (Airmetrics Co., Inc.; 5 l min(-1) flow rate). Particle mass was determined gravimetrically after 48 h of conditioning in a desiccator, in a Class 100 clean room at the temperature T = 20 degrees C and at about 50% constant relative humidity (RH).
  
  
  CONCLUSIONS
  Analysis of the PM10 data indicated a marked difference between season without heating--(summer; mean value 56 microg m(-3)) and heating season--(winter; mean value 96 microg m3); 62% of samples exceeded the level of 50 microg m(-3). The impact of meteorological factors on PM concentrations was not immediately apparent, but there was a significant negative correlation with the wind speed.
  
  
  CONCLUSIONS
  The PM10 and PM2.5 mass concentrations in the Belgrade urban area had high average values (77 microg m(-3) and 61 microg m(-3)) in comparison with other European cities. The main sources of particulate matter were traffic emission, road dust resuspension, and individual heating emissions. When the air masses are coming from the SW direction, the contribution from the Obrenovac power plants is evident. During days of exceptionally severe pollution, in both summer and winter periods, high production of secondary aerosols occurred, as can be seen from an increase in PM2.5 in respect to PM10 mass concentration.
  
  
  CONCLUSIONS
  The results obtained gave us the first impression of the concentration level of particulate matter, with an aerodynamic diameter of less than 10 microm, in the Belgrade ambient air. Due to measured high PM mass concentrations, it is obvious that it would be very difficult to meet the EU standards (EEC 1999) by 2010. It is necessary to continue with PM10 and PM2.5 sampling; and after comprehensive analysis which includes the results of chemical and physical characterization of particles, we will be able to recommend effective control measures in order to improve air quality in Belgrade.
authors.affiliation: Institute of Physics, Pregrevica 118, 11080 Belgrade, Serbia and Montenegro. rajsic@phy.bg.ac.yu
authors.forename: Slavica F
authors.initials: SF
authors.lastname: Rajsić
authors.forename: Mirjana D
authors.initials: MD
authors.lastname: Tasić
authors.forename: Velibor T
authors.initials: VT
authors.lastname: Novaković
authors.forename: Milica N
authors.initials: MN
authors.lastname: Tomasević
mesh_terms: D000336:Aerosols / Q000032:analysis; D000392:Air Movements; D000393:Air Pollutants / Q000032:analysis*; D002947:Cities; D004391:Dust / Q000032:analysis; D004784:Environmental Monitoring; D006361:Heating / Q000009:adverse effects; D006801:Humans; D010316:Particle Size; D010865:Pilot Projects; D011634:Public Health; D012621:Seasons; D014504:Urban Health; D001335:Vehicle Emissions / Q000032:analysis; D014835:Volatilization; D015022:Yugoslavia
chemical_list: D000336:Aerosols; D000393:Air Pollutants; D004391:Dust; D001335:Vehicle Emissions