Size Distribution of Chlorinated Polycyclic Aromatic Hydrocarbons in Atmospheric Particles
Size Distribution of Chlorinated Polycyclic Aromatic Hydrocarbons in Atmospheric Particles
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DOI：
10.1007/s00244-016-0327-z
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发表时间：
2017-01-01
影响因子：
4
通讯作者：
Toriba, Akira
中科院分区：
文献类型：
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作者：
Kakimoto, Kensaku;Nagayoshi, Haruna;Toriba, Akira
首次研究了日本大气颗粒物（PM）中氯化多环芳烃（ClPAH）的粒径分布。使用带有六级过滤器的PM0.1空气采样器收集PM。在2014年10月和2015年1月收集PM，以观察大气行为和PM大小的潜在季节变化，包括多环芳烃（PAHs）和ClPAH。结果表明，0.5-1.0 μ m和1.0-2.5 μ m的多环芳烃和氯代多环芳烃浓度在1月份明显增加（即，冬季）。在氯多环芳烃中，1-氯芘和6-氯苯并[a]芘是最常见的化合物;此外，约15%的氯多环芳烃处于纳米颗粒相（< 0.1 μ m）。纳米颗粒的相对高的存在是潜在的人类健康问题，因为这些颗粒可以容易地沉积在肺周围。最后，我们评估了芳烃受体（AhR）配体活性的PM提取物在每个大小的馏分。结果表明，< 2.5 μ m的PM具有较强的AhR配体活性.
The particle size distribution of chlorinated polycyclic aromatic hydrocarbons (ClPAHs) in particulate matter (PM) in Japan is examined for the first time. PM was collected using a PM0.1 air sampler with a six-stage filter. PM was collected in October 2014 and January 2015 to observe potential seasonal variation in the atmospheric behavior and size of PM, including polycyclic aromatic hydrocarbons (PAHs) and ClPAHs. We found that the concentration of PAHs and ClPAHs between 0.5-1.0 mu m and 1.0-2.5 mu m markedly increase in January (i.e., the winter season). Among the ClPAHs, 1-ClPyrene and 6-ClBenzo[a]Pyrene were the most commonly occurring compounds; further, approximately 15% of ClPAHs were in the nanoparticle phase (< 0.1 mu m). The relatively high presence of nanoparticles is a potential human health concern because these particles can easily be deposited in the lung periphery. Lastly, we evaluated the aryl hydrocarbon receptor (AhR) ligand activity of PM extracts in each size fraction. The result indicates that PM < 2.5 mu m has the strong AhR ligand activity.