期刊
JOURNAL OF ENVIRONMENTAL SCIENCES
卷 26, 期 1, 页码 160-166出版社
SCIENCE PRESS
DOI: 10.1016/S1001-0742(13)60393-9
关键词
domestic coal combustion; emission factor; polycyclic aromatic hydrocarbons; potential toxicity risk; diagnostic ratio
资金
- Natural Science Foundation of China [41275135, 41105090]
- National High Technology Research and Development Program (863) of China [2012AA063506]
- Open Foundation of Environmental Simulation and Pollution Control State Key Laboratories (Peking University)
Domestic coal stove is widely used in China, especially for countryside during heating period of winter, and polycyclic aromatic hydrocarbons (PAHs) are important in flue gas of the stove. By using dilution tunnel system, samples of both gaseous and particulate phases from domestic coal combustion were collected and 18 PAR species were analyzed by GC-MS. The average emission factors of total 18 PAR species was 171.73 mg/kg, ranging from 140.75 10 229.11 mg/kg for bituminous coals, while was 93.98 mg/kg, ranging from 58.48 to 129.47 mg/kg for anthracite coals. PAHs in gaseous phases occupied 95% of the total of PAHs emission of coal combustion. In particulate phase, 3-ring and 4-ring PAHs were the main components, accounting for 80% of the total particulate PAHs. The total toxicity potency evaluated by benzo[a]pyrene-equivalent carcinogenic power, sum of 7 carcinogenic PAH components and 2,3,7,8-tetrachlorodibenzodioxin had a similar tendency. And as a result, the toxic potential of bituminous coal was higher than that of anthracite coal. Efficient emission control should be conducted to reduce PAR emissions in order to protect ecosystem and human health.
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