Chemical characteristics of Northeast Asian fly ash particles: Implications for their long-range transportation
Chemical characteristics of Northeast Asian fly ash particles: Implications for their long-range transportation
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DOI：
10.1016/j.atmosenv.2014.06.048
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发表时间：
2014-10
影响因子：
5
通讯作者：
J. Inoue;Azusa Momose;T. Okudaira;Akiko Murakami-Kitase;H. Yamazaki;Shusaku Yoshikawa
中科院分区：
文献类型：
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作者：
J. Inoue;Azusa Momose;T. Okudaira;Akiko Murakami-Kitase;H. Yamazaki;Shusaku Yoshikawa
研究了东北亚地区排放的飞灰颗粒的化学成分，以更好地了解大气污染物的远距离传输。我们研究了球状碳质颗粒（SCP）的组成，这是一种在日本、中国、韩国和台湾的主要工业城市或附近的表层沉积物中发现的直径从几μ m到20 μm的飞灰。发现不同国家的SCP存在差异;来自日本和韩国的SCP的特征在于低Ti/Si和高S/Si比，而中国的SCP表现出高Ti/Si和低S/Si比，而来自台湾的颗粒表现出高Ti/Si和S/Si比。我们还研究了在日本海偏远岛屿上发现的SCP，这些岛屿距离任何工业城市至少100公里。根据其化学成分，这些SCP被归类为日本和韩国，中国和台湾类型使用判别分析。结果表明，在这些岛屿上发现的颗粒物中，有30-50%属于中国型，这表明这些颗粒物中的大部分可能是从中国工业区输送到这些岛屿的。这意味着即使是10 μm的大颗粒污染物，如SCP，也可以传输1000 km的远距离。
The chemical compositions of fly ash particles emitted in Northeast Asia were studied to better understand the long-range transportation of atmospheric pollutants. We examined the compositions of spheroidal carbonaceous particles (SCPs), a type of fly ash from several to ∼20 μm in diameter found in surface sediments in or near the main industrial cities of Japan, China, South Korea, and Taiwan. SCPs from different countries were found to vary; SCPs from Japan and South Korea were characterized by low Ti/Si and high S/Si ratios, whereas SCPs in China exhibited high Ti/Si and low S/Si ratios and particles from Taiwan showed high Ti/Si and S/Si ratios. We also examined the SCPs found in remote islands in the Sea of Japan, at least 100 km from any industrial city. On the basis of their chemical compositions, these SCPs were classified as Japan and Korea, China, and Taiwan types using discriminant analysis. The results indicated that 30–50% of the particles found in these islands were assigned to the China type, suggesting that most of these SCPs were probably transported from Chinese industrial regions to these islands. It implies that even large particulate pollutants of ∼10 μm, such as SCPs, could be transported long distances of ∼1000 km.