Ozone-initiated particle formation, particle aging, and precursors in a laser printer
Data(s) |
2012
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Resumo |
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. |
Formato |
application/pdf |
Identificador | |
Publicador |
American Chemical Society |
Relação |
http://eprints.qut.edu.au/51556/2/51556.pdf DOI:10.1021/es203066k 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. |
Direitos |
Copyright 2012 American Chemical Society |
Fonte |
School of Chemistry, Physics & Mechanical Engineering; Institute of Health and Biomedical Innovation; Science & Engineering Faculty |
Palavras-Chave | #050000 ENVIRONMENTAL SCIENCES #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 |
Tipo |
Journal Article |