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Elektrické výboje pro využití při čištění vody
Lukeš, Petr ; Člupek, Martin ; Babický, Václav ; Tothová, I. ; Vykouk, T. ; Říhová -Ambrožová, J. ; Janda, V.
Non-equilibrium plasma generated by electrical discharges in liquids initiate various chemical and physical processes that can be potentially utilized in different environmental, biological or medical applications. Depending on the type of the discharge and the input energy these processes include high electric field, ultraviolet radiation, overpressure shock waves and, of particular importance, formation of various reactive chemical species. It has been demonstrated that these physical and chemical processes are capable to inactivate or degrade various microorganisms and chemical compounds dissolved in water. In this presentation an overview of basic principles of electrical discharges in water will be given with particular emhasis to the pulsed (electrohydraulic) discharges, the physical and chemical effects initiated by these discharges in water and their utilization for water treatment applications.
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Potentials of the VNIR airborne hyperspectral system AISA Eagle
Hanuš, Jan ; Malenovský, Zbyněk ; Homolová, Lucie ; Kaplan, Věroslav ; Cudlín, Pavel ; Lukeš, Petr
Airborne hyperspectral remote sensing (imaging spectroscopy) sensors acquire images of several (from tens to hundreds) narrow spectral bands in visible, near and short infrared wavelengths. Use of hyperspectral remote sensing (RS) data in scientific and even commercial applications is quite broad, starting from agriculture, forestry, and natural vegetation (precision farming, assessment of general plant status, biomass estimation, species composition mapping), through geology (mapping of minerals, land degradation assessment), up to limnology (water quality evaluation), and other domains. Since 2004 the Institute of Systems Biology and Ecology (ISBE) (Academy of Sciences of the Czech Republic) has been operating the VNIR airborne hyperspectral sensor AISA Eagle. The workgroup for remote sensing of vegetation at ISBE is currently capable to facilitate the complete flight/ground hyperspectral campaign including the standard image data pre-processing.
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Inactivation of Escherichia coli by pulsed corona discharge in liquid environment
Vykouk, T. ; Člupek, Martin ; Lukeš, Petr
Although common techniques of water and wastewater treatment are well established, potential for new methods to improve the quality and effectiveness of water purification processing is still high. Among a number of methods that are under development, the pulsed corona discharge in water represents a promising alternative approach of chemical and biological decontamination of water. In this work the effects of corona discharge in water on bacteria Escherichia coli has been investigated. The contribution of UV radiation and hydrogen peroxide in the overall bacterial inactivation efficiency of the discharge was determined.
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Fotokatalytické technologie a nové nanopovrchové materiály v roce 2005
Peterka, F. ; Jirkovský, Jaromír ; Šubrt, Jan ; Špatenka, P. ; Krýsa, J. ; Lukeš, Petr ; Kavan, Ladislav ; Štengl, Václav ; Kolouch, A. ; Klusoň, P.
Current state of art in the research and development of photocatalytic titanium oxide nanosurface materials and their practical applications is discussed. The main objectives of new European COST Action “PHONASUM” (COST 540), which is understand as European platform to group the existing European collaborations and to allow for a large exchange between the different European groups focussing on the development of photocatalytical nanomaterials and standard photoactivity testing methods are presented. Specific aims and scientific results of the Research Centre for Nanosurface Engineering "NANOPIN" established in 2005 under the Research and Development Program of the Ministry of Education, Youth and Sports of the Czech Republic are shown in more detail.
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Fotokatalytické technologie a nové nanomateriály 2005
Peterka, F. ; Jirkovský, J. ; Šubrt, Jan ; Špatenka, P. ; Krýsa, J. ; Lukeš, P. ; Kavan, L. ; Štengl, Václav ; Kolouch, A. ; Klusoň, P.
The development of nanocrystaline photocatalytic materials is rapidly growing field of science and technology.
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Hygienizační účinky impulsních korónových výbojů ve vodním prostředí
Vykouk, T. ; Člupek, Martin ; Lukeš, Petr
In recent years, several types of reactors (point-plate, composite wire-cylinder, diaphragm-cylinder) to generate pulsed corona discharges in water have been developed at the Institute of Plasma Physics of the Academy of Sciences of the Czech Republic. Plasmochemical effects of these discharges on removal of organic pollutants from aqueous solutions have been studied. The effects of corona discharges on microorganisms in water are investigated in cooperation with the Department of Water Technology and Environmental Engineering of the Institute of Chemical Technology, Prague. In this work the results of the effects of corona discharge in water generated in pinhole reactor on viability of aqueous suspensions of algae Chlorella vulgaris, Desmodesmus qudricauda, bacterial culture of Enterococcus faecalis, and the mixture of thermophilic bacterias in activated sludge from biological wastewater treatment plant, are presented.
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