Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/24728
Title: Physical parameters effect on ozone-initiated formation of indoor secondary organic aerosols with emissions from cleaning products
Authors: Huang, Y
Ho, KF
Ho, SSH
Lee, SC 
Yau, PS
Cheng, Y
Keywords: BVOCs
Cleaning products
Indoor air quality (IAQ)
Ozone-initiated indoor chemistry
Physical parameters
Secondary organic aerosols (SOAs)
Issue Date: 2011
Publisher: Elsevier
Source: Journal of hazardous materials, 2011, v. 192, no. 3, p. 1787-1794 How to cite?
Journal: Journal of hazardous materials 
Abstract: The effect of air exchange rate (ACH), temperature (T), and relative humidity (RH) on the formation of indoor secondary organic aerosols (SOAs) through ozonolysis of biogenic organic compounds (BVOCs) emitted from floor cleaner was investigated in this study. The total particle count (with D p of 6-225nm) was up to 1.2×10 3#cm -3 with ACH of 1.08h -1, and it became much more significant with ACH of 0.36h -1 (1.1×10 4#cm -3). This suggests that a higher ventilation rate can effectively dilute indoor BVOCs, resulting in a less ultrafine particle formation. The total particle count increased when temperature changed from 15 to 23°C but it decreased when the temperature further increased to 30°C. It could be explained that high temperature restrained the condensation of formed semi-volatile compounds resulting in low yields of SOAs. When the RH was at 50% and 80%, SOA formation (1.1-1.2×10 4#cm -3) was the more efficient compared with that at RH of 30% (5.9×10 3#cm -3), suggesting higher RH facilitating the initial nucleation processes. Oxidation generated secondary carbonyl compounds were also quantified. Acetone was the most abundant carbonyl compound. The formation mechanisms of formaldehyde and acetone were proposed.
URI: http://hdl.handle.net/10397/24728
ISSN: 0304-3894
EISSN: 1873-3336
DOI: 10.1016/j.jhazmat.2011.07.014
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