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Seasonal and Diurnal Variability of Aerosol Number Size Distribution, Concentration and Gaseous Pollutants in Prague City Center
Leoni, C. ; Kozáková, Jana ; Hovorka, J.
Atmospheric aerosol is one of the key urban pollutants while much attention has focused to the size fractions of smaller particle diameter - Dp. The most significant sources of primary ultrafine particles (Dp<100 nm) in urban ambient air are outdoor combustion sources: vehicles, industry and power plants. The aim of this study was to investigate the relationship between ultrafine aerosol particles and gaseous pollutants (O3, NOx) and their temporal variation, to analyse the size distribution differences and to assess the major sources of ultrafine particles in Prague city center.
Fulltext: content.csg - Download fulltextPDF
Plný tet: SKMBT_C22015102910250 - Download fulltextPDF
Composition of particles and gases in emissions of spark ingnition engines: effect of operation cycles and alcohol fuels
Mikuška, Pavel ; Křůmal, Kamil ; Coufalík, Pavel ; Vojtíšek-Lom, M. ; Beránek, V. ; Štolcpartová, Jitka ; Večeřa, Zbyněk
Chemical composition of particles and gaseous compounds in emissions of spark-ignition engine depends on operation cycle and the method of formation of the fuel mixture. Particulate emissions (both particle mass and especially particle number concentration) were significantly higher at engine with the direct formation of mixture (engine DISI) than at engine with indirect formation of the mixture (MPI), and were affected both by the operating conditions and by the fuel used.

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