Oxidative potential of gas phase combustion emissions - an underestimated and potentially harmful component of air pollution from combustion processes

Stevanovic, S., Vaughan, A., Hedayat, F., Salimi, F., Rahman, M. M., Zare, A., Brown, R. A., Brown, R. J., Wang, H., Zhang, Z., Wang, X., Bottle, S. E., Yang, I. A. and Ristovski, Z. D. (2017) Oxidative potential of gas phase combustion emissions - an underestimated and potentially harmful component of air pollution from combustion processes. Atmospheric Environment, 158 227-235. doi:10.1016/j.atmosenv.2017.03.041


Author Stevanovic, S.
Vaughan, A.
Hedayat, F.
Salimi, F.
Rahman, M. M.
Zare, A.
Brown, R. A.
Brown, R. J.
Wang, H.
Zhang, Z.
Wang, X.
Bottle, S. E.
Yang, I. A.
Ristovski, Z. D.
Title Oxidative potential of gas phase combustion emissions - an underestimated and potentially harmful component of air pollution from combustion processes
Journal name Atmospheric Environment   Check publisher's open access policy
ISSN 1873-2844
1352-2310
Publication date 2017-06-01
Sub-type Article (original research)
DOI 10.1016/j.atmosenv.2017.03.041
Open Access Status Not yet assessed
Volume 158
Start page 227
End page 235
Total pages 9
Place of publication Kidlington, Oxford, United Kingdom
Publisher Pergamon Press
Collection year 2018
Language eng
Abstract The oxidative potential (OP) of the gas phase is an important and neglected aspect of environmental toxicity. Whilst prolonged exposure to particulate matter (PM) associated reactive oxygen species (ROS) have been shown to lead to negative health effects, the potential for compounds in gas phase to cause similar effects is yet to be understood. In this study we describe: the significance of the gas phase OP generated through vehicle emissions; discuss the origin and evolution of species contributing to measured OP; and report on the impact of gas phase OP on human lung cells. The model aerosol for this study was exhaust emitted from a Euro III Common-rail diesel engine fuelled with different blends of diesel and biodiesel. The gas phase of these emissions was found to be potentially as hazardous as the particle phase. Fuel oxygen content was found to negatively correlate with the gas phase OP, and positively correlate with particle phase OP. This signifies a complex interaction between reactive species present in gas and particle phase. Furthermore, this interaction has an overarching effect on the OP of both particle and gas phase, and therefore the toxicity of combustion emissions.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Medicine Publications
 
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