Atmospheric occurrence of 2-nitrobenzanthrone associated with airborne particles in central Tokyo

Koji Inazu, Vu Duc Nam, Takahiro Asato, Hiroshi Okochi, Yoshiharu Hisamatsu, Takaaki Kobayashi, Toshihide Baba

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

2- and 3-Nitrobenzanthrones (NBAs) in airborne particles collected in central Tokyo on a seasonal basis from 1996 to 2001 are quantified and possible sources are investigated. The concentrations of 2- and 3-NBA are found to range from 49 to 831 fmol m-3and 0.5 to 3.5 fmol m-3, while the nitrated polycyclic hydrocarbons 1-nitropyrene and 2-nitrofluoranthene are found at concentrations of 100-492 fmol m-3 and 10-97 fmol m-3. Significant linear correlations are identified between 2-NBA and NO 2, a photochemical product, suggesting that 2-NBA is formed by atmospheric reactions of benzanthrone initiated by hydroxyl or nitrate radicals in the presence of NO2. 2-NBA is not correlated with directly emitted compounds such as 1-nitropyrene. The concentration ratio of 2-NBA to 1-nitropyrene is 5 or greater in all samples. Nitrated polycyclic aromatic compounds formed by atmospheric reactions therefore appear to represent a substantial contribution to the mutagenicity of airborne particulate matter.

Original languageEnglish
Pages (from-to)562-577
Number of pages16
JournalPolycyclic Aromatic Compounds
Volume28
Issue number4-5
DOIs
Publication statusPublished - 2008 Aug 1

Keywords

  • 2-Nitrobenzanthrone
  • Airborne particles
  • Atmospheric nitration
  • PAH

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

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