Atmospheric Behavior of the Bifunctional Carbonyls Partitioning on SPM and NRPM
Field samples of eight bifunctional carbonyls were taken with a 3 h time resolution at a suburban area (Saitama City) of Tokyo Metropolitan from 29 July to 4 August 2008. It is said that semivolatile compounds distribute mainly in the fine fraction of the aerosols, however our results show that these compounds distribute more uniformly on the particles below 7 μm (SPM) than in particles below 1 μm (NRPM1), this fact confirms that in the sampling site an important fraction of the aerosol produced by these species is secondary and not primary in origin. The highest fraction values for NRPM1 were shown in the morning with decreasing values during the period. While for SPM the fraction values were very similar in all the period, with slightly higher values in the morning, where primary emissions increased and higher radiation made these compounds to decrease in the aerosol phase. This behavior reproduced the effects observed by Kalberer et al.1 and Molina et al.2 in the aerosol fractions. The partitioning coefficient of a given compound did not show such big differences throughout the period. Furthermore the correlations of other components in the NRPM1 fraction, like ammonium and sulfate ions concentrations, which even if they are of basic and acidic character, show the same trend when correlated to the partitioning coefficient of the measured bifunctional carbonyls.
Aerosol evolution suburban pollution atmospheric sampling bifunctional carbonyls partitioning
Ricardo Ortiz Satoru Shimada Kazuhiko Sakamoto
Institute for Environmental Science and Technology,Saitama University,255 Shimo-Okubo,Sakura,Saitama Graduate School of Science and Engineering,Saitama University,255 Shimo-Okubo,Sakura,Saitama 338-857 Institute for Environmental Science and Technology,Saitama University,255 Shimo-Okubo,Sakura,Saitama
国际会议
西安
英文
517-523
2011-08-17（万方平台首次上网日期，不代表论文的发表时间）