Characterization of hydrocarbons in aerosols and investigation of biogenic sources as a carrier of radiocesium isotopes

DOI Web Site Web Site 被引用文献4件 参考文献32件
  • Nakagawa Mayuko
    Earth Life Science Institute, Tokyo Institute of Technology
  • Yamada Keita
    Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology
  • Toyoda Sakae
    Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology
  • Kita Kazuyuki
    College of Science, Ibaraki University
  • Igarashi Yasuhito
    Atmospheric Environment and Applied Meteorology Research Department, Meteorological Research Institute
  • Komatsu Shingo
    Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology
  • Yamada Kentaro
    Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology
  • Yoshida Naohiro
    Earth Life Science Institute, Tokyo Institute of Technology Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology

書誌事項

公開日
2018-03-30
資源種別
journal article
DOI
  • 10.2343/geochemj.2.0512
公開者
一般社団法人日本地球化学会

この論文をさがす

説明

<p>In this study, the potential natural sources of secondary radiocesium isotope (134Cs and 137Cs) emissions were investigated, with a focus on n-alkanes, a characteristic bioaerosol compound. Monitoring was performed to obtain a time series of aerosol, samples, from winter 2013 to summer 2014, and size-resolved aerosol samples in 2012 and 2014. Samples were collected from the area heavily contaminated after the Fukushima Daiichi Nuclear Power Plant accident in March 2011. A correlation analysis of radiocesium, n-alkanes, and black carbon concentrations was performed to identify the contributions of aerosols from biogenic and anthropogenic sources. Biogenic n-alkanes exhibited similar concentration ranges except for spring 2014. The continuous input of biogenic n-alkanes is characteristic of a sampling site surrounded by forest, where pollen dispersion increased the concentration of biogenic n-alkanes in spring 2014. On the other hand, anthropogenic n-alkane concentrations were significantly increased in spring and summer 2014 (>50 ng/m3), compared with those prior to winter 2014 (<20 ng/m3). This anthropogenic n-alkane increase represents the beginning of reconstruction near the area. The carbon preference index (CPI) clearly showed biogenic n-alkanes with coarse-sized particles (CPI > 3), and more anthropogenic n-alkanes were contained in fine particle aerosols. Our results showed that radiocesium and biogenic n-alkane concentrations in seasonal and size-resolved aerosol samples have a partially positive correlation, which supports the hypothesis that the secondary emissions of radionuclides occurred in the forested areas.</p>

収録刊行物

被引用文献 (4)*注記

もっと見る

参考文献 (32)*注記

もっと見る

関連プロジェクト

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ