Distribution of Polycyclic Aromatic Hydrocarbons in Coal Gangue and Emitted Gas with Low-Temperature Spontaneous Combustion in Situ,Energy & Fuels

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Distribution of Polycyclic Aromatic Hydrocarbons in Coal Gangue and Emitted Gas with Low-Temperature Spontaneous Combustion in Situ
Energy & Fuels ( IF 5.3 ) Pub Date : 2018-12-10 00:00:00 , DOI: 10.1021/acs.energyfuels.8b03493
Xueqin Wen ₁ , Jingru Zhao ₁ , Fangui Zeng ₁

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Five coal gangue samples from the Duerping Coal Mine in Shanxi, China, subjected to low-temperature combustion and their emitted gas samples were collected in situ at the combustion temperatures of 23, 33, 49, 57, and 70 °C. The concentrations of 16 polycyclic aromatic hydrocarbons (PAHs) in these samples were determined by high-performance liquid chromatography; these concentrations indicated that with decreasing combustion temperature, ∑₁₆PAHs in coal gangue tend to decrease, whereas ∑₁₆PAHs in emitted gas tend to increase. With the decrease of combustion temperature, the concentrations of Σ₆LPAHs in coal gangue and emitted gas decreased, whereas the concentrations of Σ₁₀HPAHs increased; therefore, the overall toxicity and carcinogenicity increased. The total index of PAHs in the samples ranged from 20.10 to 22.43 with a mean of 21.81. The ratio of Flua/(Flua + Pyr) ranged from 0.34 to 0.97 with a mean of 0.76. Finally, the proportions of Ant/(Ant + Phe), BaA/(BaA + Chr), and InP/(InP + Bghi) were approximately 1. These ratios and the total index of the PAHs could be used to identify the source of PAHs in the atmosphere and soil.

更新日期：2018-12-10

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