Factors Controlling the Atmospheric Partitioning of Bifunctional Carbonyls
Sorptive partitioning does not explain the relatively high abundance of bifunctional carbonyls in particulate phase; hence, many models for aerosol concentrations prediction usually underestimate the contribution of these compounds to particles. Bifunctional carbonyls, which may represent a potential threat on human health, are mainly produced in the photochemical oxidation of volatile organic compounds in the atmosphere. Experimental measurements have been made under controlled conditions, but little is known about their values in the atmosphere. Experimental measurements under actual atmospheric conditions are needed in order to investigate the partitioning of these and other species in the atmosphere. Our work reports the partitioning coefficients of bifunctional carbonyls and their time variation in two different sites: at ground level near a busy road, and at 36 m above ground level, in a suburban area, in order to find how bifunctional carbonyls contribute to the formation of atmospheric aerosol near the source, and at a background site. Results showed that abundance of 8 bifunctional carbonyls in both phases was higher at roadside than at background site, with exception of hydroxyacetone and glyoxylic and pyruvic acids, with lower gaseous concentrations at roadside.
atmospheric sampling roadside concentration partitioning coefficient semivolatile carbonyls semivolatile compounds partitioning
ORTIZ Ricardo SHIMADA Satoru KUBOTA Tsutomu SAKAMOTO Kazuhiko
Department of Environmental Science and Technology,Graduate School of Science and Engineering,Saitama University,255 Shimo-okubo,Sakura,Saitama,338-8570,Japan
国际会议
2009 International Symposium on Environmental Science and Technology(2009环境科学与技术国际会议)
上海
英文
810-816
2009-06-02（万方平台首次上网日期，不代表论文的发表时间）