Calculating source contributions to urban atmospheric polycyclic aromatic hydrocarbons and nitropolycyclic aromatic hydrocarbons using 1-nitropyrene and pyrene: An application to an Asian dust event
Calculating source contributions to urban atmospheric polycyclic aromatic hydrocarbons and nitropolycyclic aromatic hydrocarbons using 1-nitropyrene and pyrene: An application to an Asian dust event
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使用 1-硝基芘和芘计算城市大气多环芳烃和硝基多环芳烃的源贡献：在亚洲沙尘事件中的应用
DOI：
10.1016/j.chemosphere.2021.130662
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发表时间：
2021
期刊：
影响因子：
8.8
通讯作者：
Nagato Edward G.
中科院分区：
文献类型：
--
作者：
Hayakawa Kazuichi;Tang Ning;Matsuki Atsushi;Inomata Yayoi;Toriba Akira;Nagato Edward G.
提出了一种计算大气中多环芳烃(PAHs)及其硝化同系物(NPAHs)的源贡献率的方法，分别以PYR和1-NP作为PAHs和NPAHs的代表。这是基于已知的NPAH/PAH比率随着燃烧温度的升高而增加。高温燃烧源的1-NP和PYR在总的1-NP和PYR中的比例分别计算为ASA(0；lt；a<；1)和b(0<；b<；1)。利用监测点获得的大气中PYR和1-NP的浓度，计算了高、低温燃烧源的贡献。利用该方法，对亚洲季节性沙尘事件期间在日本金泽采集的大气样品，计算了汽车和燃煤设施/工业对大气中PYR和1-NP浓度的贡献。结果表明，PYR几乎全部来自中国的工业排放，并远距离输送到日本。相比之下，1-NP主要来自金泽及周边地区的汽车排放，少量1-NP可能是从中国运来的。与通常使用的多环芳烃异构体对相比，所提出的方法可以在来源鉴定上提供更大的清晰度。
A method to calculate source contributions to atmospheric polycyclic aromatic hydrocarbons (PAHs) and their nitrated congeners (NPAHs) is proposed, using pyrene (Pyr) and 1-nitropyrene (1-NP), as respective representatives of PAHs and NPAHs. This is based on the known increases in NPAH to PAH ratios as combustion temperatures increase. The fractions of 1-NP and Pyr from high temperature combustion sources in total 1-NP and Pyr are respectively calculated asa(0 <a<1) andb(0 <b< 1). By using atmospheric concentrations of Pyr and 1-NP obtained at monitoring sites, contributions of high and low temperature combustion sources were calculated. Using this method, the contributions of automobiles and coal combustion facilities/industries to atmospheric Pyr and 1-NP concentrations were calculated for atmospheric samples collected in Kanazawa, Japan during a seasonal Asian dust event. The results show that Pyr was almost entirely emitted from industries in China and transported long-range to Japan. By contrast, 1-NP was emitted primarily from automobiles in Kanazawa and its surrounding areas, with a small amount of 1-NP possibly transported from China. The proposed method can provide greater clarity on source identification compared to the typically used PAH isomer pairs.