engleski

Comparison Of Organic And Elemental Carbon Mass Concentrations In PM10 Between Urban And Rural Areas

Daily PM10 samples were collected in Zagreb and Delnice during winter 2010. The sampling site in Zagreb was situated in the northern, residential part of the city. The main sources of PM and carbon species are mostly household appliances and moderate traffic. In Delnice, the sampling site was situated at the north-east edge of the settlement. The main PM and carbon species source is wood used for cooking and heating. Daily samples of airborne particles were collected on pre-fired quartz fibre filters. Nominal sampling flow rate was 38 dm3 min-1. PM10 mass concentrations were determined gravimetrically following the European norm EN 12341. Samples were analysed for organic carbon (OC) and elemental carbon (EC) using the thermal/optical transmittance method (TOT) with a NIOSH-like protocol. These preliminary measurements have been conducted within the IAEA TC Project RER/2/005 "Characterizing Seasonal Variations in Elemental Particulate Matter Concentrations in European Urban and Rural Areas under Different Climatic Conditions" and will continue during summer. Average mass concentrations of PM10 were 58.05 μg m-3 in Zagreb and 46.97 μg m-3 in Delnice. In Zagreb, average OC and EC mass concentrations in PM10 were 11.98 μg m-3 and 1.55 μg m-3, while in Delnice they were 18.90 μg m-3 and 2.23 μg m-3. OC and EC contributed 26.77 % and 4.07 % to the total PM10 mass in Zagreb and 35.99 % and 4.58 % to the total PM10 mass in Delnice. The average OC/EC ratios in PM10 in Zagreb and Delnice were 8.51 and 10.72, respectively.

EC; OC; OC/EC ratio; PM10

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