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Characterization of atmospheric particulate matter by diffusive gradient in thin film (DGT) technique
Gregušová, Michaela ; Dočekal, Bohumil
In this study, characteristics of heavy metal contamination in road dust collected from urban area with heavy traffic in Brno, Czech Republic was investigated. The DGT probes were exposed in aqueous suspensions of particulate matter for different time periods to monitor responses of the sample matter. The road dust and DGT sorption gels were decomposed by microwave assisted extraction and analyzed by inductively coupled plasma mass spectrometry for estimation of trace metals contents. The results revealed that the traffic appears to be responsible for the high levels of Cu, Pb, Ni and Sb and also that DGT technique, as alternative to conventional extraction procedures is a useful tool for characterization of metals mobility.
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First experiences with inhalation of nanoparticles by small animals
Mikuška, Pavel ; Večeřa, Zbyněk
The contribution describes an inhalation chamber constructed for long-term exposure studies of small animals to nanoparticles under strictly controlled conditions (i.e., temperature, relative humidity, illumination, pressure). Nanoparticles were synthetized on-line in a tube flow reactor using metal organic precursors. Experiments proved that the inhalation chamber is suitable for „whole body“ experiments with small animals
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Nanoparticle Formation by Thermal Decomposition and Oxidation of Manganese(II) Acetylacetonate
Moravec, Pavel ; Smolík, Jiří ; Bakardjieva, Snejana ; Levdansky, V.V.
Over the last decade, Mn and MnOx nanoparticles has been extensively investigated due to their great importance in catalysis, electrochemistry, ion exchange materials, batteries and other areas (Si et al., 2005; Han et al., 2006). This work describes preliminary experiments producing manganese nanoparticles by metal organic chemical vapor deposition (MOCVD) using manganese(II) acetylacetonate (MnAA) as a precursor.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22012102615333 - PDF
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Mass Size Distribution of Water Soluble Ions in Prague and Wiena in Summer
Schwarz, Jaroslav ; Vodička, Petr ; Zíková, Naděžda ; Hitzenberger, R.
Aerosol mass size distribution is a key factor that influences aerosol behavior both on local (health effects, visibility) and global (global warming) level. The content of water soluble ions is the most important factor controlling hygroscopic behavior of aerosol particles. Hygroscopicity is a substantial parameter for particle deposition in lungs, particle – cloud interactions, aerosol optical effects etc. Therefore we studied size distribution of water soluble ions in two Central European capitals – Prague and Vienna. In this work, the results from summer campaigns are presented.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22012102615330 - PDF
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