Emission of Polycyclic Aromatic Hydrocarbons in China

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• 作者：Shanshan Xu ; Wenxin Liu ; and Shu Tao
• 刊名：Environmental Science & Technology
• 出版年：2006
• 出版时间：February 1, 2006
• 年：2006
• 卷：40
• 期：3
• 页码：702 - 708
• 全文大小：324K
• 年卷期：v.40,no.3(February 1, 2006)
• ISSN：1520-5851

文摘

Emission of 16 polycyclic aromatic hydrocarbons (PAHs)listed as U.S. Environmental Protection Agency (U.S. EPA)priority pollutants from major sources in China werecompiled. Geographical distribution and temporal changeof the PAH emission, as well as emission profiles, arediscussed. It was estimated that the total PAH emissionin China was 25 300 tons in 2003. The emission profile featureda relatively higher portion of high molecular weight(HMW) species with carcinogenic potential due to largecontributions of domestic coal and coking industry. Amongvarious sources, biomass burning, domestic coal combustion,and coking industry contributed 60%, 20%, and 16% ofthe total emission, respectively. Total emission, emissiondensity, emission intensity, and emission per capita showedgeographical variations. In general, the southeasternprovinces were characterized by higher emission density,while those in western and northern China featuredhigher emission intensity and population-normalized emission.Although energy consumption in China went up continuouslyduring the past two decades, annual emission of PAHsfluctuated depending on the amount of domestic coalconsumption, coke production, and the efficiency of energyutilization.