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J Hazard Mater

Title:		Influence of ozone concentration and temperature on ultra-fine particle and gaseous volatile organic compound formations generated during the ozone-initiated reactions with emitted terpenes from a car air freshener
Author(s):		Lamorena RB; Lee W;
Address:		"Department of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology, 373-1 Daejon, Republic of Korea"
Journal Title:		J Hazard Mater
Year:		2008
Volume:		20080207
Issue:		2-Mar
Page Number:		471 - 477
DOI:		10.1016/j.jhazmat.2008.01.095
ISSN/ISBN:		0304-3894 (Print) 0304-3894 (Linking)
Abstract:		"Experiments were conducted to identify the emissions from the car air freshener and to identify the formation of ultra-fine particles and secondary gaseous compounds during the ozone-initiated oxidations with emitted volatile organic compounds (VOCs). The identified primary constituents emitted from the car air freshener in this study were alpha-pinene, beta-pinene, p-cymene, and limonene. Formation of ultra-fine particles (4.4-160 nm) was observed when ozone was injected into the chamber containing emitted monoterpenes from the air freshener. Particle number concentrations, particle mass concentrations, and surface concentrations were measured in time dependent experiments to describe the particle formation and growth within the chamber. The irritating secondary gaseous products formed during the ozone-initiated reactions include formaldehyde, acetaldehyde, acrolein, acetone, and propionaldehyde. Ozone concentration (50 and 100 ppb) and temperature (30 and 40 degrees C) significantly affect the formation of particles and gaseous products during the ozone-initiated reactions. The results obtained in this study provided an insight on the potential exposure of particles and irritating secondary products formed during the ozone-initiated reaction to passengers in confined spaces"
Keywords:		*Automobiles *Odorants Ozone/*analysis Particle Size Temperature Triterpenes/*chemistry Volatile Organic Compounds/*chemical synthesis;
Notes:		"MedlineLamorena, Rheo B Lee, Woojin eng Research Support, Non-U.S. Gov't Netherlands 2008/03/14 J Hazard Mater. 2008 Oct 30; 158(2-3):471-7. doi: 10.1016/j.jhazmat.2008.01.095. Epub 2008 Feb 7"