title: Concentrations of nano and related ambient air pollutants at a traffic sampling site.
abstract: A micro-orifice uniform deposit impactor (MOUDI) and a nano-MOUDI were used to measure the atmospheric coarse (PM2.5 -10), fine (PM2.5), ultrafine (PM0.056-1) and nano (<0.056 microm) particle concentrations and size distributions at a traffic sampling site in winter in central Taiwan, from November 2004 to January 2005. Concentrations of metallic elements (Fe, Mg, Cr, Zn, Pb, Cu) and major ion (SO4(2-), NO3(-), NH4(+)) in particles of various sizes (nano, ultrafine, fine and coarse) were measured. Ambient air particulates generally exhibited a bimodal size distribution in the range 0.056-10 microm. The results show that the concentrations followed the order, Fe>Mg>Cr>Zn>Pb> Cu in PM10, fine, ultrafine and nano-sized particles. Moreover, the data showed that the average metallic elements Fe and Zn have similar concentration distributions: the concentration decreased as the particle size fell in the nano size range.
authors.affiliation: Air Toxic and Environmental Analysis Laboratory, HungKuang University, Sha-Lu, Taichung, Taiwan. gcfang@sunrise.hk.edu.tw
authors.forename: Guor-Cheng
authors.initials: GC
authors.lastname: Fang
authors.forename: Yuh-Shen
authors.initials: YS
authors.lastname: Wu
authors.forename: Chih-Chung
authors.initials: CC
authors.lastname: Wen
authors.forename: Chi-Kwong
authors.initials: CK
authors.lastname: Lin
authors.forename: Shih-Han
authors.initials: SH
authors.lastname: Huang
authors.forename: Jui-Yeh
authors.initials: JY
authors.lastname: Rau
authors.forename: Chung-Po
authors.initials: CP
authors.lastname: Lin
mesh_terms: D000393:Air Pollutants / Q000032:analysis*; D004784:Environmental Monitoring / Q000379:methods*; D010316:Particle Size; D015203:Reproducibility of Results; D013624:Taiwan; D001335:Vehicle Emissions / Q000032:analysis*; D014887:Weather
chemical_list: D000393:Air Pollutants; D001335:Vehicle Emissions