Measurements of stable carbon and oxygen isotopic compositions of CO in automobile exhausts and ambient air from semi-urban Mainz, Germany.

• Kato Shungo

  Research Center for Advanced Science and Technology, The University of Tokyo

• Akimoto Hajime

  Research Center for Advanced Science and Technology, The University of Tokyo

• Bräunlich Maya

  Atmospheric Chemistry Division, Max Planck Institute for Chemistry

• Röckmann Thomas

  Atmospheric Chemistry Division, Max Planck Institute for Chemistry

• Brenninkmeijer Carl A. M.

  Research Center for Advanced Science and Technology, The University of Tokyo

Abstract

Stable isotopic measurements of atmospheric CO (¹³CO, C¹⁸O) were carried out at three season in a middle size city, Mainz in Germany. CO stable isotopic compositions of car exhaust fueled by gasoline, diesel and natural gas were also measured and showed different isotopic compositions (δ¹⁸O vs. V-SMOW = 22.3 ± 0.3‰, 10.9 ± 0.8‰, 20.1 ± 1.0‰ and δ¹³C vs. V-PDB = -29.9 ± 0.3‰, -22.2 ± 1.1‰, -51.3 ± 1.5‰, respectively). The ¹⁸O/¹⁶O ratios of atmospheric CO in Mainz show a clear linear correlation with the reciprocal concentration of CO. This reveals the contribution of CO emitted from a single pollution source (δ¹⁸O = 20.7 ± 0.5‰ V-SMOW), whose isotopic composition is close to that of CO from a gasoline engine combustion. From this value and car exhaust measurements, about 14 ± 7% of CO in Mainz air is estimated to originate from diesel fuel engine combustion. The oxygen isotopic composition can be used as a good indicator of contamination from car exhausts. On the other hand, the ¹³C/¹²C ratios of CO do not show a clear relationship with the reciprocal concentration of CO.

Journal

• GEOCHEMICAL JOURNAL

  GEOCHEMICAL JOURNAL 33 (2), 73-77, 1999

  GEOCHEMICAL SOCIETY OF JAPAN

Keywords

• Geochemistry and Petrology
• Geophysics

Details

• CRID: 1390001204551298816
• NII Article ID: 130003904617
• NII Article ID: 10008803625
• NII Book ID: AA00654975
• DOI: 10.2343/geochemj.33.73
• ISSN: 18805973
• ISSN: 00167002
• NDL BIB ID: 4805898
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4805898
• Web Site: http://www.jstage.jst.go.jp/article/geochemj1966/33/2/33_2_73/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed