1. State Key Laboratory of Coal Resources and Safe Mining, College of Geoscience and Surveying Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China; 2. School of Computer Science, Shaanxi Normal University, Xi'an 710062, China
Abstract：The sources of polycyclic aromatic compounds (PACs) and carcinogenic risk in soils from three typical coal mining areas were analyzed with positive matrix factorization analysis (PMF) and Monte-Carlo simulation. The results showed that the soil in Shizuishan coal mine, Qipanjing coal mine and Shitanjing coal mine ΣPACs were 21862, 6226 and 2278μg/kg, respectively. PACs species were abundant and dominated by low rings, which was significantly affected by the coal mining area. Meanwhile, the concentration of alkyl polycyclic aromatic hydrocarbons (aPAHs) was significantly higher than that of parent polycyclic aromatic hydrocarbons (16PAHs). The results of PMF showed that coal and gangue particles were the primary pollution sources in the coal mine areas, followed by traffic sources. Monte-Carlo simulation showed that the three coal mining areas have potential carcinogenic risks to local residents. Although the study area was significantly affected by coal pollution sources, coal combustion was the main contributor to carcinogenic risks. In addition, Monte-Carlo simulation was more accurate than incremental lifetime cancer risk (ILCR), and the traditional risk assessment used ILCR significantly underestimates the actual cancer risk of adults.
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