Influence of oxygenated organic aerosols (OOAs) on the oxidative potential of diesel and biodiesel particulate matter

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

42 Scopus Citations
View graph of relations

Author(s)

  • S. Stevanovic
  • B. Miljevic
  • N. C. Surawski
  • K. E. Fairfull-Smith
  • S. E. Bottle
  • And 2 others
  • R. Brown
  • Z. D. Ristovski

Detail(s)

Original languageEnglish
Pages (from-to)7655-7662
Journal / PublicationEnvironmental Science and Technology
Volume47
Issue number14
Publication statusPublished - 16 Jul 2013
Externally publishedYes

Abstract

Generally, the magnitude of pollutant emissions from diesel engines running on biodiesel fuel is ultimately coupled to the structure of the fuel's constituent molecules. Previous studies demonstrated the relationship between the organic fraction of particulate matter (PM) and its oxidative potential. Herein, emissions from a diesel engine running on different biofuels were analyzed in more detail to explore the role that different organic fractions play in the measured oxidative potential. In this work, a more detailed chemical analysis of biofuel PM was undertaken using a compact time of flight aerosol mass spectrometer (c-ToF AMS). This enabled a better identification of the different organic fractions that contribute to the overall measured oxidative potentials. The concentration of reactive oxygen species (ROS) was measured using a profluorescent nitroxide molecular probe 9-(1,1,3,3- tetramethylisoindolin-2-yloxyl-5-ethynyl)-10-(phenylethynyl)anthracene (BPEAnit). Therefore, the oxidative potential of the PM, measured through the ROS content, although proportional to the total organic content in certain cases, shows a much higher correlation with the oxygenated organic fraction as measured by the c-ToF AMS. This highlights the importance of knowing the surface chemistry of particles for assessing their health impacts. It also sheds light onto new aspects of particulate emissions that should be taken into account when establishing relevant metrics for assessing health implications of replacing diesel with alternative fuels. © 2013 American Chemical Society.

Citation Format(s)

Influence of oxygenated organic aerosols (OOAs) on the oxidative potential of diesel and biodiesel particulate matter. / Stevanovic, S.; Miljevic, B.; Surawski, N. C.; Fairfull-Smith, K. E.; Bottle, S. E.; Brown, R.; Ristovski, Z. D.

In: Environmental Science and Technology, Vol. 47, No. 14, 16.07.2013, p. 7655-7662.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review