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Fluidized Bed Gasification of Flax used for Phytoextration of Heavy Metals
Pohořelý, Michael ; Šyc, Michal ; Jeremiáš, Michal ; Vosecký, Martin ; Kameníková, Petra ; Skoblia, Sergej ; Svoboda, Karel ; Punčochář, Miroslav
This study was aimed at determination of distribution of heavy metals among producer gas and individual size fractions of ash matter, i. e. bed ash and cyclone ash, formed in fluidized bed steam biomass gasification. Knowledge of distribution of heavy metals is necessary for further utilization of all products of the gasification.
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Fuel Characteristics of Flax (Linum usitatissimum) Applied for Phytoremediation of Industrially Contaminated Sites
Šyc, Michal ; Pohořelý, Michael ; Toufarová, H. ; Žáčková, P. ; Punčochář, Miroslav
Expansion of energetic crops growing leads to the need of cultivation of soil that was not used so far. Flax as an energetic crop is possible to grow on insdustrially contaminated sites. Furthermore, heavy metals bioaccumulation ability of flax caused remediation of contaminated soils by moving them to phytomass. This phytoremediation method is called phytoextraction and it is one of the phytoremediation technologies. Fuel characteristics and usability of flax for selected heavy metals (Cu, Pb, Zn, Cd, Hg, Cr, Ni, As) phytoextraction are presented in short-paper.
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Identification of Relations between Parameters of the Aerosol and Location of his Occurence
Tydlitát, Vratislav ; Pekárek, Vladimír ; Šyc, Michal
Analysis AAS of aerosols taken on three places in Prague, fractions PM10 and PM2,5 is presented. As, Cd, Cr, Cu, Mn, Ni, Pb, Al, Fe, Zn are determined. By the method EDX are determined relative content of 37 elements. Two analysis of samples of powders catured on ventilation filters in Prague 5 and Prague 6 are presented (inorgnic anionts, NH4+, Ca, Mg, Na, K,SiO2 are determined).
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The Rating of the Relation between the Composition of Solid Matter in the Atmosphere and Their Sources in Selected Areas of Prague
Tydlitát, Vratislav ; Pekárek, Vladimír ; Schwarz, Jaroslav ; Šyc, Michal ; Vosecký, Martin
From eght chemical composition of aerosols PM10 and PM2,5 from two areas in Prague on the end of winter and in sommer in analogy with statistical analyses of other authors it was concluded which are possible sources of aerosols in the areas of measurement. For chemical analysis AAS, iont chromatography and X-ray fluorescence methods were used..Soil dust and fine silicates there are a very probable source of aerosols . In connection with realisation of a few measurements the existence of other sources (heating, traffic, cment kiln, industry, ammonium sulphate, nitrate iont) is discussed.
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Asessment of the Relation between the Composition of Aerosols of Solids in Air and Their Sources on Selected Places in Prague
Tydlitát, Vratislav ; Pekárek, Vladimír ; Šyc, Michal ; Vosecký, Martin
Results of the twentyfour hour sampling of aerosols at two posts in Prague: on a street with large traffic and at a post near to cement plant are presented. In aerosols PM10 a PM2,5 adsorbed from 500 to 1000 m3 of air (20 to 40 mg) were determined contents of As,Cd, Cr,Cu, Mn, Ni, Pb, Al, Ca, Fe, K, Mg, Na, Zn by the method of atomic absorption spectrometry. From x-ray fluorescence analyze were assesed contents of Si, S and Cl.. The winter traffic is the source of aerosol wth content of NaCl and SiO2 , Fe, Ca. In the vicinity of cement plant the aerosol contents elements, which are in cement and elements fom combustion: K, Ca, Al and S.
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