Comprehensive Physical and Chemical Characterization of Urban Aerosols in Vienna, Austria
This contribution presents results of a broad physical and chemical characterization of urban aerosol covering particle size range from nanoparticles to microparticles. PM10, PM2.5 and PM1 size fractions were measured with impactors delivering information about particle mass concentrations. Due to the atmospheric optical relevance of fine particles a telephotometric method was utilized to obtain atmospheric visibility, another quantity providing an insight into the particulate air pollution and linked with the PM1 fraction. The time-resolved detailed size distribution of PM1 was determined using a scanning differential mobility analyzer. A comprehensive post-sampling chemical characterization of the aerosol in question was performed. The data obtained shows that there is a shift of particles from the PM1 size fraction to the PM2.5 size fraction at the expense of about 50％ of the mass concentration in the PM1 fraction. Evidently, merely PM filter sampling does not provide an appropriate insight into the actual situation and dynamics in the PM-fractions. Due to the small absolute mass concentration values of the PM1 fraction, its presence in the PM2.5 fraction results in a negligible mass contribution and will likely not be observed by means of the conventional PM measurement.
Atmospheric Aerosols PM-fractions Nanoparticles Chemical Composition
Nayla Sabbagh-Kupelwieser Kazuhiko Sekiguchi Kyung Hwan Kim Hidehiro Kamiya Wladyslaw W. Szymanski
Faculty of Physics,University of Vienna,Austria Graduate School of Science and Engineering,Shimo-Okubo,Saitama University,Japan Tokyo University of Science and Technology,Dept. of Chemical Engineering,Tokyo,Japan
国际会议
西安
英文
507-511
2011-08-17（万方平台首次上网日期，不代表论文的发表时间）