Abstract
This study had the aim of characteristics of <TEX>$PM_{10}$</TEX> in subway cabins. <TEX>$PM_{10}$</TEX> was measured by times of day (rush and non rush hours) and seasons with real time <TEX>$PM_{10}$</TEX> sampler on the subway cabins of line 7. Filter samples were collected for evaluation of their elemental composition as well as identification of major sources of <TEX>$PM_{10}$</TEX> using a receptor model, PMF. <TEX>$PM_{10}$</TEX> concentration were the highest in the winter season both in the rush and non rush hours at 152.8 <TEX>${\mu}g/m^3$</TEX>, 90.2 <TEX>${\mu}g/m^3$</TEX> respectively. The <TEX>$PM_{10}$</TEX> concentrations in rush hour were 30% higher compared to non rush hours. Based on the chemical information, the composition rare of inorganic elements was 52.5%, anions were 10.2% and others were 37.3%. Fe was the most abundant element and significantly correlated (p.0.01) with Mn (r=0.97), Ti (r=0.91), Cr (r=0.88), Ni (r=0.89) and Cu (r=0.88). Characterized <TEX>$PM_{10}$</TEX> sources by PMF in the cabin were soil and road dust related sources (27.2%), railroad related sources (47.5%), secondary nitrate sources (16.2%) and a Cl-factor mixed with a secondary sulfate source (9.1%).
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