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Polycyclic aromatic hydrocarbons study in atmospheric fine and coarse particles using diagnostic ratios and receptor model in urban/industrial region |
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| Authors: | Elba Calesso Teixeira Camila Dalla Porta Mattiuzi Dayana Milena Agudelo-Castañeda Karine de Oliveira Garcia Flavio Wiegand |
| Institution: | 1. Research Department, Funda??o Estadual de Prote??o Ambiental Henrique Luis Roessler, Rua Carlos Chagas 55/802, 90030-020, Porto Alegre, Rio Grande do Sul, Brazil 2. Postgraduate Program in Remote Sensing and Meteorology, Geosciences Institute, Universidade Federal do Rio Grande do Sul, Av. Bento Gon?alves, 9500, 91501-970, Porto Alegre, Rio Grande do Sul, Brazil 3. Environmental Engineering Program, Universidade Federal do Rio Grande do Sul (UFRGS), Av. Bento Gon?alves, 9500, 91501-970, Porto Alegre, Rio Grande do Sul, Brazil |
| Abstract: | Atmospheric fine and coarse particles were collected in Teflon filters in three cities of the region of the Lower Sinos River Basin of Rio Grande do Sul in the year 2010. The filters were Soxhlet extracted, and 14 priority PAHs were analyzed using a gas chromatograph coupled to a mass spectrometer (GC/MS). The principal emission sources of these compounds were assessed by using diagnostic ratios and receptor model: positive matrix factorization (PMF 3.0) of the US Environmental Protection Agency. The results of PAHs concentration for the studied year showed significant levels of high molecular weight (HMW) PAH, Ind, and BghiP, in PM2.5 in the winter season, showing the influence of mobile sources. The application of receptor model PMF 3.0 revealed that the main sources of PAHs were vehicle fleet (both diesel and gasoline), followed by coal combustion, wood combustion, and resuspension of dust. The results of the receptor modeling are in agreement with the data obtained by the ratio diagnostic. |
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