A13B-3155:
Elemental and ionic composition of atmospheric aerosols in the dust storm season in Mongolian Gobi Desert
Monday, 15 December 2014
Tseren-Ochir Soyol-Erdene1, Dagva Shagjjamba1, Sangbum Hong2, Enkhmaa Sarangerel3 and Khatanbaatar Byambatsogt4, (1)National University of Mongolia, Ulaanbaatar, Mongolia, (2)KOPRI Korea Polar Research Institute, Incheon, South Korea, (3)National Agency Meteorology and the Environmental Monitoring, Ulaanbaatar, Mongolia, (4)Central Laboratory of National Inspection Agency, Ulaanbaatar, Mongolia
Abstract:
TSP (Total Suspended Particulate) PM10 (particle size smaller than 10 μm) and PM2.5 (particle size smaller than 2.5 μm) aerosol samples in the dust storm session in Mongolian Gobi Desert were collected and their water soluble ionic and elemental composition were elaborated in demonstrating the mixing of mineral aerosol with pollution aerosol. During the sampling period (5-15 April, 2014) the dust storm peaked on 14 April, in which the highest concentrations of PM10 and PM2.5 were 250.1 and 33.4 respectively. The water soluble anions (SO42-, NO3-, Cl- and HCO3- and PO43-) and cations (Na+, K+, NH4+, Ca2+, Mg2+ and Li+) of the samples were determined by ion chromatograph. Elemental composition for 48 elements determined by using X-ray fluorescence analyzer. For the PM2.5 samples, concentrations of V, Ge, As, Se, Br, Ag, Hg, Tl, Bi were less than instrumental detection limit and Cr, Co, Cu, Nb, Mo, Sb, I, Ba, Ce, Hf, W, Au, Pb were determined only in a few samples. Other elements were observed in most samples. For the PM2.5-10 samples, concentrations of Ge, As, Se, Br, Ag, Hf, Tl were less than instrumental detection limit and V, Co, Nb, Mo, I, Ce, W, Pb were determined only small samples. Others are determined in most samples. Aerosol sources, sources fractions (mineral and pollution), and mixing of aerosols from various sources will be investigated by further data analyses.
