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《Geochimica》 2007-01
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Characteristics of polycyclic aromatic hydrocarbons emitted from indoor combustion of domestic coals

CHEN Ying-jun1*, FENG Yan-li2, ZHI Guo-rui1, SHENG Guo-ying2,1 and FU Jia-mo2,1 1. State Key Laboratory of Organic Geochemistry, Guangdong Key Laboratory of Environmental Resources Utilization and Protection, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China; 2. Institute of Environmental Pollution and Health, School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200072, China  
Domestic coal combustion is the most important source of outdoor and indoor air pollution in China. In order to investigate the characteristics of polycyclic aromatic hydrocarbons (PAHs) emitted from combustion of domestic coals with various maturities, a sampling system was employed in the present study to collect the emissions from five coals (one anthracite and four bituminous coals), and 24 PAHs were quantified in the emissions and were compared with those extracted from raw coals. The results show that notable differences exist about the emission factor (EF) of PAH among five coals. The total EF of 24 PAHs from anthracite coal combustion (184 μg/kg) is lower by three orders of magnitude than those of bituminous coals (136-408 mg/kg). The extraction rates of PAH show the similar variation among different coals. The percentage of different types of PAH (parent-PAH, methyl-PAH, and O/S-PAH) varied among five coals, but remained the same tendency in samples before and after coal combustion, which suggests the inheritance to some extent. By comparison of four toxic parameters, it is found that the toxic equivalent of PAH in the emissions of anthracite decreased obviously comparing to those in raw coal, while the status reversed for bituminous coals.
【Fund】: 国家自然科学基金(40133010);; 博士后科学基金(2005037597)
【CateGory Index】: X701
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