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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 ORCID: 0000-0003-3970-098X, Rahman, MM, Zare, A, Brown, RA, Brown, RJ, Wang, H, Zhang, Z, Wang, X, Bottle, SE, Yang, IA and Ristovski, ZD 2017 , 'Oxidative potential of gas phase combustion emissions - An underestimated and potentially harmful component of air pollution from combustion processes' , Atmospheric Environment, vol. 158 , pp. 227-235 , doi: 10.1016/j.atmosenv.2017.03.041.

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Abstract

The oxidative potential (OP) of the gas phase is an important and neglected aspect of environmentaltoxicity. 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 causesimilar 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 gasphase OP on human lung cells. The model aerosol for this study was exhaust emitted from a Euro IllCommon-rail diesel engine fuelled with different blends of diesel and biodiesel. The gas phase of theseemissions was found to be potentially as hazardous as the particle phase. Fuel oxygen content was foundto negatively correlate with the gas phase OP, and positively correlate with particle phase OP. This signifiesa complex interaction between reactive species present in gas and particle phase. Furthermore, thisinteraction has an overarching effect on the OP of both particle and gas phase, and therefore the toxicityof combustion emissions.

Item Type: Article
Authors/Creators:Stevanovic, S and Vaughan, A and Hedayat, F and Salimi, F and Rahman, MM and Zare, A and Brown, RA and Brown, RJ and Wang, H and Zhang, Z and Wang, X and Bottle, SE and Yang, IA and Ristovski, ZD
Journal or Publication Title: Atmospheric Environment
Publisher: Pergamon-Elsevier Science Ltd
ISSN: 1352-2310
DOI / ID Number: 10.1016/j.atmosenv.2017.03.041
Copyright Information:

Copyright 2017 Elsevier Ltd.

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