Nanoparticle formation from a commercial air freshener at real-exposure concentrations of ozone

Title
Nanoparticle formation from a commercial air freshener at real-exposure concentrations of ozone
Authors
타이프엉부김선화이승복심상규배귀남손종렬
Keywords
Nanoparticle; Air Freshener; Ozone; Volatile organic compounds; Nucleation burst; Condensational growth
Issue Date
2011-03
Publisher
Asian journal of atmospheric environment
Citation
VOL 5, NO 1, 21-28
Abstract
Occupational nanomaterial exposure is an important issue in the manufacture of such products. People are also exposed to various nanoparticles in their living environments. In this study, we investigated nanoparticle formation during the reaction of ozone and volatile organic compounds (VOCs) emitted from a commercial air freshener, one of many widely used consumer products, in a 1-m3 reaction chamber. The air freshener contained various VOCs, particularly terpenes. A petri dish containing 0.5 mL of the air freshener specimen was placed in the bottom of the chamber, and ozone was continuously injected into the center of the chamber at a flow rate of 4 L/min with an ozone concentration of either 50, 100 or 200 ppb. Each test was conducted over a period of about 4 h. The higher ozone concentrations produced larger secondary nanoparticles at a faster rate. The amount of ozone reacted was highly correlated with the amount of aerosol formation. Ratios of reacted ozone concentration and of formed particle mass concentration for the three injected ozone concentrations of 50, 100 and 200 ppb were similar to one other; 4.6 : 1.9 : 1.0 and 4.7 : 2.2 : 1.0 for ozone and aerosol mass, respectively.
URI
http://pubs.kist.re.kr/handle/201004/39569
ISSN
1976-6912
Appears in Collections:
KIST Publication > Article
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