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Dust in Libraries
Mašková, Ludmila ; Smolík, Jiří
Indoor air pollution in libraries and archives can be harmful for materials stored there. Adverse effects of most of gaseous pollutants are well described, but less is known about dust. Dust particles cover a wide range of sizes and have a variable composition. These characteristics determine their transport to the surfaces and also possible harmful effects. Dust particles not only cause soiling, but coarse particles can damage surfaces by abrasion. Fine particles of acidic or alkaline character may penetrate into the books where they may cause chemical degradation or moistening due to their hygroscopicity. Dust particles in the indoor environment of libraries and archives are studied in a project which aim is a development of evaluation methods for indoor air quality, targeted at reduction of damages on archival collections caused by adverse effects of environment.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22014031914460 - PDF
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Deposition of Aerosol Particles on Filter Surfaces
Smolík, Jiří ; Mašková, Ludmila ; Zíková, Naděžda ; Ondráček, Jakub
The simple model showed that the particle penetration and deposition depend on particle size and width of the gap, with the depth of the penetration limited by parallel diffusional deposition on filter surfaces. Smaller particles penetrate faster and deeper resulting in higher particle number concentration of deposited particles but higher mass is transported by larger particles. The results of modelling have been qualitatively confirmed by Ion Chromatography using sulphate as marker for deposited particles.
Fulltext: PDF
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Exoposure of Citizen and Emplyee of Municipal Transport to Polycyclic Aromatic Hydrocarbons (PAHs) Contained in the Atmosphere at Travelling in Prague
Tydlitát, Vratislav ; Kotlík, B. ; Mikešová, M.
Concentration of PAHs, the number of aerosol particles of wide size spectrum, mass content of PM10 , PM2,5 and microclimatic parameters in atmosphere of Prague tram were measured in november 2008 and may 2009 on ost/west and south/nord lines. Concentration of PAHs TEFs does not overstep 30% over recomended limit 1ng.m-3. Mean concentration of PM10 during 8 hours oversteps permitted limit 50 g.m-3 more than three times, at PM2,5 oversteps the limit two times. At pollution asserts oneself emissions from vehicles at frequent parallel tram lines and transport lines. It is estimate the measure of exposure of the participant of tram tarffic to polycyclic aromatic hydrocarbons and to aerosole particles . PM10 , PM2,5 a PM1.
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Dynamics of Aerosol Number Size Distributions during an Experimental Campaign at the Bily Kriz Measuring Site
Ždímal, Vladimír ; Moravec, Pavel ; Smolík, Jiří ; Mikuška, Pavel ; Večeřa, Zbyněk ; Pokorný, Radek
This work aimed at studying the dynamics of atmospheric aerosol particle size distributions and interpreting it in connection to local concentrations of gaseous pollutants and basic meteorological parameters. Number size distributions had been monitored with high time resolution during an intense experimental campaign at a remote continental sampling site Bily Kriz. The site is located at the NE tip of the Czech Republic in the hilly region. The campaign had ben carried out at the end of June 2001. Several very interesting events were observed when formation of large amounts of new aerosol particles occured in the day time. Due to the behaviour of other measured parameters it was concluded that the so called "nucleation events" took place on a mesoscale region.
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