文献类型： 外文期刊

作者： Kuang, Yuan-wen ¹ ; Zhou, Guo-yi ¹ ; Wen, Da-zhi ¹ ; Li, Jiong ¹ ; Sun, Fang-fang ³ ;

作者机构： 1.Chinese Acad Sci, Inst Ecol, S China Bot Garden, Guangzhou 510650, Guangdong, Peoples R China

2.Chinese Acad Sci, Key Lab Vegetat Restorat & Management Degraded Ec, S China Bot Garden, Guangzhou 510650, Guangdong, Peoples R China

3.Guangdong Acad Agr Sci, Res Ctr Qual Safety & Stand Agr Prod, Guangzhou 510640, Guangdong, Peoples R China

期刊名称：JOURNAL OF ENVIRONMENTAL MONITORING （ 影响因子：2.179； 五年影响因子：2.461 ）

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收录情况： SCI

摘要： Concentrations of polycyclic aromatic hydrocarbons (PAHs) were examined and potential sources of PAHs were identified from the dated tree-rings of Masson pine (Pinus massoniana L.) near two industrial sites (Danshuikeng, DSK and Xiqiaoshan, XQS) in the Pearl River Delta of south China. Total concentrations of PAHs (∑PAHs) were revealed with similar patterns of temporal trends in the tree-rings at both sites, suggesting tree-rings recorded the historical variation in atmospheric PAHs. The differences of individual PAHs and of ∑PAHs detected in the tree-rings between the two sites reflected the historical differences of airborne PAHs. Regional changes in industrial activities might contribute to the site-specific and period-specific patterns of the tree-ring PAHs. The diagnostic PAH ratios of Ant/(Ant + PA), FL/(FL + Pyr), and BaA/(BaA + Chr)) revealed that PAHs in the tree-rings at both sites mainly stemmed from the combustion process (pyrogenic sources). Principal component analysis further confirmed that wood burning, coal combustion, diesel, and gasoline-powered vehicular emissions were the dominant contributors of PAHs sources at DSK, while diesel combustion, gasoline and natural gas combustion, and incomplete coal combustion were responsible for the main origins of PAHs at XQS. Tree-ring analysis of PAHs was indicative of PAHs from a mixture of sources of combustion, thus minimizing the bias of short-term active air sampling.