論文

査読有り
2008年4月

Morphological and light-absorption characteristics of individual BC particles collected in an urban seaside area at Tokaimura, eastern central Japan

SCIENCE OF THE TOTAL ENVIRONMENT
  • FengFu Fu
  • ,
  • Kazuo Watanabe
  • ,
  • Nobuo Shinohara
  • ,
  • Xueqin Xu
  • ,
  • Liangjun Xu
  • ,
  • Tasuku Akagi

393
2-3
開始ページ
273
終了ページ
282
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1016/j.scitotenv.2008.01.018
出版者・発行元
ELSEVIER SCIENCE BV

To observe surface morphology and light-absorption property of different black carbon (BC) particles, different-sized aerosols were collected in Tokaimura (36.27 degrees N, 140.36 degrees E), an urban seaside area of eastern central japan, using a high-volume Andersen type sampler during a whole year (Jan. to Dec. in 2004). The morphology of individual BC particle separated from different-sized aerosols was observed with Scanning Electron Microscope with Energy Dispersive X-ray Spectrometer (SEM-EDX) and four types of morphology were observed: 50 nm spherical particles, micrometer-sized plates with homogeneous surfaces, micrometer-sized spherical particles with homogeneous surfaces and micrometer-sized spherical particles with small holes on surfaces. The light-absorption property of BC particles with different morphology has been determined by infrared spectrometry (IRS) with a photoacoustic technique in a region of 400-4000 wavenumbers (cm(-1)). All morphology BC particles showed a strong light-absorption during 500-3000 wavenumbers (cm(-1)) with two strong broad peaks in 750-1100 and 1200-2200 wavenumbers (cm(-1)), implying that all morphology BC particles can absorb a significant part of thermal infrared emitted from the earth (wavelength 4000-50,000 nm).
The seasonal variation and the size-distribution of aerosols and its chemical components (e.g. C, Na, Cl, NH4+, NO3-, SO42- Al, Ca, Mg and Fe) were also measured in this study. More than 55% of non-inorganic carbon (OC + BC) in the atmosphere was detected in the aerosols with a size smaller than 1.1 mu m and the concentration of non-inorganic carbon in the atmosphere showed only a faint variation during a whole year, although the concentrations of total aerosols and its chemical components exhibited a distinct variation. (C) 2008 Elsevier B.V. All rights reserved.

Web of Science ® 被引用回数 : 5

リンク情報
DOI
https://doi.org/10.1016/j.scitotenv.2008.01.018
PubMed
https://www.ncbi.nlm.nih.gov/pubmed/18262223
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000254704100009&DestApp=WOS_CPL

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