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

Stevanovic, S; Miljevic, B; Surawski, NC; Fairfull-Smith, KE; Bottle, SE; Brown, R; Ristovski, ZD

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

Stevanovic, S Miljevic, B Surawski, NC

Fairfull-Smith, KE Bottle, SE Brown, R Ristovski, ZD

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Publication Type:: Journal Article
Citation:: Environmental Science and Technology, 2013, 47 (14), pp. 7655 - 7662
Issue Date:: 2013-07-16

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Field	Value	Language
dc.contributor.author	Stevanovic, S	en_US
dc.contributor.author	Miljevic, B	en_US
dc.contributor.author	Surawski, NC https://orcid.org/0000-0003-2584-1044	en_US
dc.contributor.author	Fairfull-Smith, KE	en_US
dc.contributor.author	Bottle, SE	en_US
dc.contributor.author	Brown, R	en_US
dc.contributor.author	Ristovski, ZD	en_US
dc.date.issued	2013-07-16	en_US
dc.identifier.citation	Environmental Science and Technology, 2013, 47 (14), pp. 7655 - 7662	en_US
dc.identifier.issn	0013-936X	en_US
dc.identifier.uri	http://hdl.handle.net/10453/117140
dc.description.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.	en_US
dc.relation.ispartof	Environmental Science and Technology	en_US
dc.relation.isbasedon	10.1021/es4007433	en_US
dc.subject.classification	Environmental Sciences	en_US
dc.subject.mesh	Oxygen	en_US
dc.subject.mesh	Organic Chemicals	en_US
dc.subject.mesh	Aerosols	en_US
dc.subject.mesh	Gasoline	en_US
dc.subject.mesh	Oxidation-Reduction	en_US
dc.subject.mesh	Particulate Matter	en_US
dc.title	Influence of oxygenated organic aerosols (OOAs) on the oxidative potential of diesel and biodiesel particulate matter	en_US
dc.type	Journal Article
utslib.citation.volume	14	en_US
utslib.citation.volume	47	en_US
utslib.for	090201 Automotive Combustion and Fuel Engineering (incl. Alternative/Renewable Fuels)	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	closed_access
pubs.issue	14	en_US
pubs.publication-status	Published	en_US
pubs.volume	47	en_US

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.

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http://hdl.handle.net/10453/117140