The Characteristics of Polycyclic Aromatic Hydrocarbons in Different Emission Source Areas in Shenyang, China
The Characteristics of Polycyclic Aromatic Hydrocarbons in Different Emission Source Areas in Shenyang, China
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DOI：
10.3390/ijerph16162817
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发表时间：
2019-08
影响因子：
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通讯作者：
Lu Yang;Genki Suzuki;Lulu Zhang;Quanyu Zhou;Xuan Zhang;Wanli Xing;M. Shima;Yoshiko Yoda;Ryohei Nakatsubo;Takatoshi Hiraki;Baijun Sun;W. Fu;H. Qi;K. Hayakawa;A. Toriba;N. Tang
中科院分区：
文献类型：
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作者：
Lu Yang;Genki Suzuki;Lulu Zhang;Quanyu Zhou;Xuan Zhang;Wanli Xing;M. Shima;Yoshiko Yoda;Ryohei Nakatsubo;Takatoshi Hiraki;Baijun Sun;W. Fu;H. Qi;K. Hayakawa;A. Toriba;N. Tang
在2012年至2014年的暖季和冷季期间，在中国沈阳的SY-1、SY-2和SY-3三个不同区域收集颗粒物（PM）。SY-1位于一座火力发电厂旁边，远离中心区。SY-2位于主干道上的一个燃煤锅炉附近，靠近中心区。SY-3位于主干道上，无固定排放源。9 PM结合多环芳烃（PAHs）进行了分析。结果表明，总PAHs的平均浓度在冷季（92.6-316 ng m−3）高于暖季（18.4-32.2 ng m−3）。在暖季，五环和六环多环芳烃在所有站点中都占很大比例，而在冷季，四环多环芳烃占主导地位。多个PAH诊断比值表明，沈阳市暖季和冷季的PAHs主要来源不仅是燃煤，还包括机动车排放。在这项研究中，我们认为，苯并[a]芘/苯并[ghi]芘比值（[BaP]/[BgPe]）为0.6是一个有用的指标，推测燃煤和汽车尾气的相对意义。尽管沈阳市政府已采取措施解决空气污染问题，但与我们以前的研究相比，PM和PAH浓度并没有显著下降。根据暖季和冷季三个地点的苯并（a）芘当量总浓度计算得出的致癌风险超过了美国环保署规定的可接受限度。
Particulate matter (PM) was collected in three different areas, SY-1, SY-2, and SY-3, in Shenyang, China, during the warm and cold seasons from 2012 to 2014. SY-1 was located beside a thermal power plant, far from the central area. SY-2 was near a coal heating boiler on the main road, close to the central area. SY-3 was on the main road, without fixed emission sources. Nine PM-bound polycyclic aromatic hydrocarbons (PAHs) were analyzed. The results showed that the mean concentration of total PAHs was higher in the cold season (92.6–316 ng m−3) than in the warm season (18.4–32.2 ng m−3). Five- and six-ring PAHs occupied a large percentage at all sites in the warm season, and four-ring PAHs were the dominant components in the cold season. Several diagnostic PAH ratios indicated that the main sources of PAHs in Shenyang in the warm and cold seasons were not only coal burning but also vehicle emission. In this study, we suggest that a benzo[a]pyrene/benzo[ghi]perylene ratio ([BaP]/[BgPe]) of 0.6 was a useful indicator to speculate the relative significance of coal burning and vehicle exhaust. Although the Shenyang government has undertaken actions to address air pollution, the PM and PAH concentrations did not decrease significantly compared to those in our previous studies. The cancer risk calculated from the BaP equivalent total concentration at all three sites in the warm and cold seasons exceeded the acceptable limit established by the US EPA.