AAAR 36th Annual Conference October 16 - October 20, 2017 Raleigh Convention Center Raleigh, North Carolina, USA
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Partitioning of Particulate Matter and Elements of Suburban Continental Aerosols between Fine and Coarse Mode
Jelena Đuričić-Milanković, Ivan Anđelković, Ana Pantelić, Srđan Petrović, Andera Gambaro, DRAGANA ĐORđEVIć, Centre of Environmental Chemistry and Engineering – ICTM
Abstract Number: 14 Working Group: Remote and Regional Atmospheric Aerosols
Abstract The results presented in this work are from long-term measurements of masses of size-segregated aerosols and macro and micro elements in the range of PM0.27-16. The following 25 elements: Al, Ag, As, Ba, Be, Ca, Cd, Co, Cr, Cu, Fe, Hg, K, Mg, Mn, Mo, Na, Ni, Pb, Sb, Se, Ti, Tl, V and Zn were analysed; level of Be, Hg and Se were under the detection limits in all samples. The results showed the domination of particle content around the accumulation mode in the range of 0.53 < Dp < 1.06 mm, but the fractional distribution of elements showed maximal average concentrations in different fractions depending on the origin of each element. Crustal elements (Al, Ca, Fe, Mg, Mn, Ti etc.) dominated in coarse mode while anthropogenic elements (As, Cd, Cu, Pb, Sb etc.) were mainly distributed in fine mode fractions. Some elements appeared in investigated aerosols only occasionally e.g. As and Ni, while others were constantly present e.g. Ca, Fe, Mg, Na etc. At the same time, contents of K in the fine fractions are higher, which is an indicator of wood mass and biomass burning. In fractions of fine mode, As, Cd, K, Pb, V, Sb dominate – elements of anthropogenic origin, emitted from traffic and high temperature processes in the closer and wider region: coal fired power plants, copper mining etc. The share of of Ca is constantly significantly high at all times in both fine and coarse mode, K dominates in fine mode, Al, Fe and Mg dominate in coarse mode, while other elements such as As and Ni appear sporadically. The results obtained in this study provide new insights into the characterization of the profile of suburban aerosols from the continental Balkans.