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首页> 外文期刊>Journal of environmental monitoring: JEM >Analysis of polycyclic aromatic hydrocarbons in tree-rings of Masson pine (Pinus massoniana L.) from two industrial sites in the Pearl River Delta, south China
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Analysis of polycyclic aromatic hydrocarbons in tree-rings of Masson pine (Pinus massoniana L.) from two industrial sites in the Pearl River Delta, south China

机译：中国南方珠江三角洲两个工业区马尾松（Pinus massoniana L.）年轮中的多环芳烃分析

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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.
机译：检查了多环芳烃（PAHs）的浓度，并从珠江三角洲两个工业区（淡水坑，DSK和西qiao山，XQS）附近的马尾松（Pinus massoniana L.）的陈年树木年轮中发现了PAHs的潜在来源。中国南方在两个站点的树轮中，PAHs（∑PAHs）的总浓度都以类似的时间趋势模式显示，表明树轮记录了大气PAHs的历史变化。在两个站点之间的树环中检测到的单个PAH和ΣPAH的差异反映了机载PAH的历史差异。工业活动的区域变化可能有助于树环PAH的特定地点和特定时期的模式。诊断的Ant /（Ant + PA），FL /（FL + Pyr）和BaA /（BaA + Chr）的PAH比值表明，两个位置的树环中的PAHs主要来自燃烧过程（热原） ）。主成分分析进一步证实，木材燃烧，煤炭燃烧，柴油和汽油驱动的车辆排放是DSK中PAHs来源的主要贡献者，而柴油燃烧，汽油和天然气燃烧以及不完全燃煤是主要来源。 XQS的PAH数量。多环芳烃的树木年轮分析表明混合燃烧源中的多环芳烃，因此可最大程度地减少短期主动空气采样的偏差。

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