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DOI	10.1016/j.atmosenv.2021.118550
	Mixing state of printer generated ultrafine particles: Implications for the complexity of indoor aerosols
	Wang H.; He C.; Modini R.L.; Wang W.; Lu H.; Morawska L.
发表日期	2021
ISSN	1352-2310
卷号	259
英文摘要	The operation of laser printers can lead to the emission of high numbers of ultrafine particles. Evidence on the toxicology and adverse health effects of these particles has been mounting, however few studies have investigated the complexity of these particles in terms of their volatility, hygroscopicity and mixing state. This study utilized a Volatility Hygroscopic Tandem Differential Mobility Analyzer (VH-TDMA) to explore the internal and external mixing states of printer-generated particles. Up to 6.0 × 105 particles. cm−3 were observed during the operation of the laser printer, and these ultrafine particles could be classified into three groups, each with its own particular volatility (i.e., gradually shrinkable, suddenly shrinkable and expandable), owing to the different internal mixing states. In particular, we propose shell-core structures to explain the special volatility of these particles. In addition, whilst the majority of the generated particles were initially hydrophobic at 90% relative humidity (RH), it was observed that there were a very small number of volatilized particles (less than 5%) that shrank (i.e., decreased in size) after humidification. This study can be used as a model for investigating the complex particle formation processes in relation to secondary organic aerosols from other sources. Furthermore, our results shed light on the complexity of indoor aerosols, which should be investigated further in future indoor air quality studies. © 2021 Elsevier Ltd
关键词	Hygroscopicity dynamic index Indoor air quality Office equipment SOA VH-TDMA
语种	英语
scopus关键词	3D printers; Aerosols; Air quality; Mixing; Printing presses; Adverse health effects; Hygroscopicity dynamic index; Indoor aerosols; Indoor air quality; Internal mixing; Laser printers; Mixing state; SOA; Ultrafine particle; Volatility hygroscopic tandem differential mobility analyzer; Indoor air pollution; aerosol; air quality; complexity; detection method; humification; hydrophobicity; indoor air; relative humidity; toxicology; aerosol; air quality; ambient air; Article; complex formation; hydrophobicity; particle size; particulate matter; relative humidity; secondary organic aerosol; ultrafine particulate matter; wettability
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248354
作者单位	Institute for Environmental and Climate Research, Jinan University, Guangzhou, 511442, China; International Laboratory for Air Quality and Health, Institute of Health and Biomedical Innovation, Queensland University of Technology, GPO Box 2434, Brisbane, QLD 4001, Australia; QUT-JNU Joint Laboratory for Air Quality Science and Management, Jinan University, Guangzhou, China; Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hong Kong
推荐引用方式 GB/T 7714	Wang H.,He C.,Modini R.L.,et al. Mixing state of printer generated ultrafine particles: Implications for the complexity of indoor aerosols[J],2021,259.
APA	Wang H.,He C.,Modini R.L.,Wang W.,Lu H.,&Morawska L..(2021).Mixing state of printer generated ultrafine particles: Implications for the complexity of indoor aerosols.ATMOSPHERIC ENVIRONMENT,259.
MLA	Wang H.,et al."Mixing state of printer generated ultrafine particles: Implications for the complexity of indoor aerosols".ATMOSPHERIC ENVIRONMENT 259(2021).