Ozone-initiated particle formation, particle aging, and precursors in a laser printer

Wang, Hao, He, Congrong, Morawska, Lidia, McGarry, Peter, & Johnson, Graham (2012) Ozone-initiated particle formation, particle aging, and precursors in a laser printer. Environmental Science and Technology, 46(2), pp. 704-712.

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An increasing number of researchers have hypothesized that ozone may be involved in the particle formation processes that occur during printing, however no studies have investigated this further. In the current study, this hypothesis was tested in a chamber study by adding supplemental ozone to the chamber after a print job without measurable ozone emissions. Subsequent particle number concentration and size distribution measurements showed that new particles were formed minutes after the addition of ozone. The results demonstrated that ozone did react with printer-generated volatile organic compounds (VOCs) to form secondary organic aerosols (SOAs). The hypothesis was further confirmed by the observation of correlations among VOCs, ozone, and particles concentrations during a print job with measurable ozone emissions. The potential particle precursors were identified by a number of furnace tests, which suggested that squalene and styrene were the most likely SOA precursors with respect to ozone. Overall, this study significantly improved scientific understanding of the formation mechanisms of printer-generated particles, and highlighted the possible SOA formation potential of unsaturated nonterpene organic compounds by ozone-initiated reactions in the indoor environment. © 2011 American Chemical Society.

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ID Code: 51556
Item Type: Journal Article
Refereed: Yes
Keywords: Formation mechanism, Formation potential, Furnace tests, Indoor environment, Laser printers, Ozone emission, Particle formation process, Particle formations, Particle number concentration, Particles concentration, Secondary organic aerosols, Size distribution measurements, Printing presses, Styrene, Unsaturated compounds, Volatile organic compounds, Ozone, organic compound, squalene, volatile organic compound, aerosol, atmospheric pollution, concentration (composition), emission, identification method, indoor air, measurement method, size distribution, article, controlled study, furnace, human, hypothesis, laser, observation, particle size, precursor, printing, secondary organic aerosol
DOI: 10.1021/es203066k
ISSN: 0013-936X
Subjects: Australian and New Zealand Standard Research Classification > ENVIRONMENTAL SCIENCES (050000)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > Institutes > Institute of Health and Biomedical Innovation
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2012 American Chemical Society
Deposited On: 11 Jul 2012 23:15
Last Modified: 19 Dec 2012 10:13

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