Vladislav Bizek - Academia.edu (original) (raw)
Papers by Vladislav Bizek
Atmospheric Environment, 2011
Two measurement campaigns near busy freeway and suburban crossroad (different traffic intensity) ... more Two measurement campaigns near busy freeway and suburban crossroad (different traffic intensity) were carried out in Prague city. Both of the two traffic related campaigns were supported with simultaneous measurements at suburban background site to compare measured values with corresponding city background. Extensive set of aerosol instrumentation was used during both campaigns at both measurement sites. Two aerosol spectrometer sets (SMPS and APS) were used to monitor aerosol particle number size distribution. Two BLPI provided information about mass size distribution and chemical composition of collected size resolved aerosol samples. The crossroad campaign was also supported by two EC/OC field analysers providing information about elemental and organic carbon concentrations. Consequent chemical analysis of collected size resolved samples comprised of ion chromatography (water soluble ions), PIXE (elements) and RBS (carbon). Results obtained from spectrometers and BLPIs showed that the main contribution of traffic in ultrafine size range can be attributed to direct exhaust emissions, while the coarse fraction was dominated mainly by regional background aerosol with small traces of brake and tyre abrasion as well as the resuspension of the road dust. Chemical analysis demonstrated that most of the water soluble ions can be found in fine fraction of mass distribution and mostly comes from regional background and long range transport. Most of major elements were found in coarse fraction of mass size distribution and it can be attributed to three different sources: abrasion of different vehicle parts (Fe, Cu, Mn and Zn), resuspension of the road dust (Si, Al, Ca) and long range transport or regional background (Ca and K). Elemental carbon concentration (diesel engine emissions) was found to be proportional to traffic intensity.
Prostřednictvím nově navržených emisních faktorů/emisních funkcí byla upřesněna metodika emisní i... more Prostřednictvím nově navržených emisních faktorů/emisních funkcí byla upřesněna metodika emisní inventury pro emise tuhých znečišťujících látek (PM10, PM2.5, včetně otěrů brzd, pneumatik a povrchů vozovek) a dalších polutantů vznikajících při provozu silničních vozidel. Byly experimentálně zjištěny rozdíly ve velikosti i chemickém složení částic (přítomnost markrů) v blízkosti dopravních komunikací, které indikují nezanedbatelný podíl otěrů na celkové imisní zátěži. Experimentálně bylo prokázáno, že sekundární částice představují zhruba polovinu hmotnosti frakce PM10 a u nižších frakcí je jejich podíl dominantní (jedná se zejména o dusičnany a sírany). Byla vytvořena metodika pro dynamickou simulaci emisí tuhých znečišťujících látek (včetně emisí z otěrů pneumatik, brzd a povrchů komunikací) a oxidu uhličitého z provozu vozidel na liniových komunikacích. Tato metodika poskytuje výsledky srovnatelné s výsledky standardně užívaného statického modelu, implicitně reaguje na plynulost provozu vozidel a umožňuje navíc zohlednit i další faktory (detailnější složení dopravního proudu, naloženost nákladních vozidel, počet os nákladních vozidel). Uvedená metodika může v makro i mikro měřítku sloužit k odhadu emisních inventur a emisních projekcí a k analýze scénářů
研究論集 = Journal of Inquiry and Research, Sep 1, 2021
Chemical and Biochemical Engineering Quarterly, 1989
Etude comparative des resultats experimentaux et des valeurs simulees obtenues pour differents sy... more Etude comparative des resultats experimentaux et des valeurs simulees obtenues pour differents systemes d'extraction liquide liquide a conrtrecourant.L'extraction physique et l'extraction chimique sont toutes deux considerees et les profils de concentration determines
Environmental Problems, 2021
We developed an algorithm for the estimation of harmful emissions depending on the amount of supp... more We developed an algorithm for the estimation of harmful emissions depending on the amount of supplied electricity and heat at coal-fired TPP. By this algorithm, we calculated the emissions of SO2 and dust at Ukrainian TPP in 2017 and 2018. The values of SO2 concentrations in dry flue gases at Ukrainian TPP in 2017 and 2018 depending on fuel brand, sulfur content, and method of slag removal in the boiler were in the range of 1520–5900 mg/Nm3, and the general gross emissions of SO2 were about 620 thousand t. The specific emissions of SO2 were at a level of 14–15 g/kWh of supplied electric energy as compared with 1.2 g/kWh – the level for coal-fired plants of EU countries. At Ukrainian TPP, about 100 thousand t of dust were thrown away. The dust concentrations in flue gases at Ukrainian TPP were equal to 300–1800 mg/Nm3. The values of specific dust emissions per 1 kWh of supplied electricity constituted 0.8-5.1 g against 0.2 g/kWh characteristic of present-day coal-fired TPP of EU coun...
Chemical and Biochemical Engineering Quarterly, 1987
Le modele, a partir des compositions d'entree et des equations d'equilibre, permet de cal... more Le modele, a partir des compositions d'entree et des equations d'equilibre, permet de calculer les compositions des courants, de sortie et des profils de concentration le long des cascades en fonction du nombre de plateaux, des debits et de la position des courants paralleles
Chemical and Biochemical Engineering Quarterly, 1987
Le modele, a partir des compositions d'entree et des equations d'equilibre, permet de cal... more Le modele, a partir des compositions d'entree et des equations d'equilibre, permet de calculer les compositions des courants, de sortie et des profils de concentration le long des cascades en fonction du nombre de plateaux, des debits et de la position des courants paralleles
ABSTRACT The EU’s 2020 vision aims to deliver a bright future for Europe. This can only be achiev... more ABSTRACT The EU’s 2020 vision aims to deliver a bright future for Europe. This can only be achieved in the context of a sustainable, healthy environment. The Advisory Group on Environment (including climate change) sees the need to achieve a new balance between continued support for disciplinary research while at the same time fostering inter-disciplinary approaches to complex issues. Along with understanding the processes leading to global environmental change, must be added an understanding of societal changes and their implications for the quality of environment, and the mechanisms of knowledge transfer and innovation infrastructures that are required to make the 2020 vision a success.
Collection of Czechoslovak Chemical Communications, 1990
<jats:p>In this work measurements of mean holdup of dispersed phase, of axial holdup profil... more <jats:p>In this work measurements of mean holdup of dispersed phase, of axial holdup profiles and of flooding points in a reciprocating plate contactor with both the VPE-type plates and the sieve plates were carried out. The experimental results were compared with a monodisperse model of steady-state column hydrodynamics and the model parameters were evaluated. Important differences in the behaviour of the two plate types could be identified. Comparison was also made between two reciprocating drives of different pulse form.</jats:p>
Collection of Czechoslovak Chemical Communications, 1990
For optimizing a production plant an objective function, "optimum criterion", was formu... more For optimizing a production plant an objective function, "optimum criterion", was formulated and an optimum criterion of a part of the plant, an apparatus, consistent with that of the plant was proposed. This was specified for a counter-current extraction column with mechanical agitation and various sets of constraints were discussed. An optimization algorithm of complex system based on alternating minimization of individual parts and of the whole system was suggested.
Chemical Engineering Science, 1993
ABSTRACT
The Canadian Journal of Chemical Engineering, 1992
Publish with Bio Med Central and every scientist can read your work free of charge "BioMed Centra... more Publish with Bio Med Central and every scientist can read your work free of charge "BioMed Central will be the most significant development for disseminating the results of biomedical researc h in our lifetime."
Industrial & Engineering Chemistry Research, 1994
Lactic, malic, and citric acids are representatives of hydroxycarboxylic acids, and they are also... more Lactic, malic, and citric acids are representatives of hydroxycarboxylic acids, and they are also important biotechnological products. Extraction equilibria of these acids in the system watersolution of trialkylamine in mixtures of l-octanolln-heptane a t temperatures 25,50, and 75 O C have been measured. Mathematical models of diverse complexity are presented, and their goodness of fit is tested and mutually compared. The best fits display the models comprising the formation of three acid-amine complexes and the nonideality of organic phase. In the cases of lactic and malic acids the acid-amine complexes (l,l), (2,1), and (2,2) and in the case of citric acid the complexes (l,l), (1,2), and (2,3) have been included. The incorporation of dissociation in the aqueous phase and of its nonideality has been found to have little effect on the model accuracy. The effects of temperature and solvent composition on the extraction equilibria have been studied, and exponential relations for their prediction have been derived. All the three systems display sensitivity to both temperature and solvent composition. Accordingly the principles of "temperature and diluent swings" are applicable to the processes of extractive recovery and purification of the acids investigated.
The Canadian Journal of Chemical Engineering, 1993
Air quality projections of sulphur dioxide, nitrogen dioxide, PM10 and ground-level ozone for Pra... more Air quality projections of sulphur dioxide, nitrogen dioxide, PM10 and ground-level ozone for Prague and the Central Bohemia region till 2030 were developed using the SUDPLAN (Sustainable Urban Development Planner) modelling tool which enables simulation of the impact of emissions and climate change on the concentration of both primary and secondary pollutants in the atmosphere at both macroscopic and microscopic scales. Emission projections till 2030 were taken from the GAINS (Greenhouse Gas-Air Pollutants Interactions and Synergies) model. In addition, the impact on air quality was simulated for three typical situations: Substantial change in operation of a large combustion plant (close-down or doubled thermal input), completion of the Prague city highway bypass and hypothetic construction of three satellite settlements in the outskirts of Prague.
Document complet disponible sur OLIS dans son format d'origine Complete document available o... more Document complet disponible sur OLIS dans son format d'origine Complete document available on OLIS in its original formatCOM/ENV/TD(2003)36/FINAL This study analyses the development of trade in environmental goods and services in Czech Republic and the impact of its liberalization on the country. Demand for environmental goods, mostly end-of-pipe equipment surged as the government introduced emergency environmental regulations in 1991-1992, which triggered significant investment in environmental goods and services in the private sector. The sudden opening of Czech markets through trade liberalization, in the absence of a long-term, integrated strategy, however, has upset the demand-supply equilibrium although it has improved conditions for investment in end-of-pipe technology. Experience with Czech Republic reveals that in order to benefit from trade liberalization of environmental goods and services, an appropriate regulatory framework and policy should be put in place.
Atmospheric Environment, 2011
Two measurement campaigns near busy freeway and suburban crossroad (different traffic intensity) ... more Two measurement campaigns near busy freeway and suburban crossroad (different traffic intensity) were carried out in Prague city. Both of the two traffic related campaigns were supported with simultaneous measurements at suburban background site to compare measured values with corresponding city background. Extensive set of aerosol instrumentation was used during both campaigns at both measurement sites. Two aerosol spectrometer sets (SMPS and APS) were used to monitor aerosol particle number size distribution. Two BLPI provided information about mass size distribution and chemical composition of collected size resolved aerosol samples. The crossroad campaign was also supported by two EC/OC field analysers providing information about elemental and organic carbon concentrations. Consequent chemical analysis of collected size resolved samples comprised of ion chromatography (water soluble ions), PIXE (elements) and RBS (carbon). Results obtained from spectrometers and BLPIs showed that the main contribution of traffic in ultrafine size range can be attributed to direct exhaust emissions, while the coarse fraction was dominated mainly by regional background aerosol with small traces of brake and tyre abrasion as well as the resuspension of the road dust. Chemical analysis demonstrated that most of the water soluble ions can be found in fine fraction of mass distribution and mostly comes from regional background and long range transport. Most of major elements were found in coarse fraction of mass size distribution and it can be attributed to three different sources: abrasion of different vehicle parts (Fe, Cu, Mn and Zn), resuspension of the road dust (Si, Al, Ca) and long range transport or regional background (Ca and K). Elemental carbon concentration (diesel engine emissions) was found to be proportional to traffic intensity.
Prostřednictvím nově navržených emisních faktorů/emisních funkcí byla upřesněna metodika emisní i... more Prostřednictvím nově navržených emisních faktorů/emisních funkcí byla upřesněna metodika emisní inventury pro emise tuhých znečišťujících látek (PM10, PM2.5, včetně otěrů brzd, pneumatik a povrchů vozovek) a dalších polutantů vznikajících při provozu silničních vozidel. Byly experimentálně zjištěny rozdíly ve velikosti i chemickém složení částic (přítomnost markrů) v blízkosti dopravních komunikací, které indikují nezanedbatelný podíl otěrů na celkové imisní zátěži. Experimentálně bylo prokázáno, že sekundární částice představují zhruba polovinu hmotnosti frakce PM10 a u nižších frakcí je jejich podíl dominantní (jedná se zejména o dusičnany a sírany). Byla vytvořena metodika pro dynamickou simulaci emisí tuhých znečišťujících látek (včetně emisí z otěrů pneumatik, brzd a povrchů komunikací) a oxidu uhličitého z provozu vozidel na liniových komunikacích. Tato metodika poskytuje výsledky srovnatelné s výsledky standardně užívaného statického modelu, implicitně reaguje na plynulost provozu vozidel a umožňuje navíc zohlednit i další faktory (detailnější složení dopravního proudu, naloženost nákladních vozidel, počet os nákladních vozidel). Uvedená metodika může v makro i mikro měřítku sloužit k odhadu emisních inventur a emisních projekcí a k analýze scénářů
研究論集 = Journal of Inquiry and Research, Sep 1, 2021
Chemical and Biochemical Engineering Quarterly, 1989
Etude comparative des resultats experimentaux et des valeurs simulees obtenues pour differents sy... more Etude comparative des resultats experimentaux et des valeurs simulees obtenues pour differents systemes d'extraction liquide liquide a conrtrecourant.L'extraction physique et l'extraction chimique sont toutes deux considerees et les profils de concentration determines
Environmental Problems, 2021
We developed an algorithm for the estimation of harmful emissions depending on the amount of supp... more We developed an algorithm for the estimation of harmful emissions depending on the amount of supplied electricity and heat at coal-fired TPP. By this algorithm, we calculated the emissions of SO2 and dust at Ukrainian TPP in 2017 and 2018. The values of SO2 concentrations in dry flue gases at Ukrainian TPP in 2017 and 2018 depending on fuel brand, sulfur content, and method of slag removal in the boiler were in the range of 1520–5900 mg/Nm3, and the general gross emissions of SO2 were about 620 thousand t. The specific emissions of SO2 were at a level of 14–15 g/kWh of supplied electric energy as compared with 1.2 g/kWh – the level for coal-fired plants of EU countries. At Ukrainian TPP, about 100 thousand t of dust were thrown away. The dust concentrations in flue gases at Ukrainian TPP were equal to 300–1800 mg/Nm3. The values of specific dust emissions per 1 kWh of supplied electricity constituted 0.8-5.1 g against 0.2 g/kWh characteristic of present-day coal-fired TPP of EU coun...
Chemical and Biochemical Engineering Quarterly, 1987
Le modele, a partir des compositions d'entree et des equations d'equilibre, permet de cal... more Le modele, a partir des compositions d'entree et des equations d'equilibre, permet de calculer les compositions des courants, de sortie et des profils de concentration le long des cascades en fonction du nombre de plateaux, des debits et de la position des courants paralleles
Chemical and Biochemical Engineering Quarterly, 1987
Le modele, a partir des compositions d'entree et des equations d'equilibre, permet de cal... more Le modele, a partir des compositions d'entree et des equations d'equilibre, permet de calculer les compositions des courants, de sortie et des profils de concentration le long des cascades en fonction du nombre de plateaux, des debits et de la position des courants paralleles
ABSTRACT The EU’s 2020 vision aims to deliver a bright future for Europe. This can only be achiev... more ABSTRACT The EU’s 2020 vision aims to deliver a bright future for Europe. This can only be achieved in the context of a sustainable, healthy environment. The Advisory Group on Environment (including climate change) sees the need to achieve a new balance between continued support for disciplinary research while at the same time fostering inter-disciplinary approaches to complex issues. Along with understanding the processes leading to global environmental change, must be added an understanding of societal changes and their implications for the quality of environment, and the mechanisms of knowledge transfer and innovation infrastructures that are required to make the 2020 vision a success.
Collection of Czechoslovak Chemical Communications, 1990
<jats:p>In this work measurements of mean holdup of dispersed phase, of axial holdup profil... more <jats:p>In this work measurements of mean holdup of dispersed phase, of axial holdup profiles and of flooding points in a reciprocating plate contactor with both the VPE-type plates and the sieve plates were carried out. The experimental results were compared with a monodisperse model of steady-state column hydrodynamics and the model parameters were evaluated. Important differences in the behaviour of the two plate types could be identified. Comparison was also made between two reciprocating drives of different pulse form.</jats:p>
Collection of Czechoslovak Chemical Communications, 1990
For optimizing a production plant an objective function, "optimum criterion", was formu... more For optimizing a production plant an objective function, "optimum criterion", was formulated and an optimum criterion of a part of the plant, an apparatus, consistent with that of the plant was proposed. This was specified for a counter-current extraction column with mechanical agitation and various sets of constraints were discussed. An optimization algorithm of complex system based on alternating minimization of individual parts and of the whole system was suggested.
Chemical Engineering Science, 1993
ABSTRACT
The Canadian Journal of Chemical Engineering, 1992
Publish with Bio Med Central and every scientist can read your work free of charge "BioMed Centra... more Publish with Bio Med Central and every scientist can read your work free of charge "BioMed Central will be the most significant development for disseminating the results of biomedical researc h in our lifetime."
Industrial & Engineering Chemistry Research, 1994
Lactic, malic, and citric acids are representatives of hydroxycarboxylic acids, and they are also... more Lactic, malic, and citric acids are representatives of hydroxycarboxylic acids, and they are also important biotechnological products. Extraction equilibria of these acids in the system watersolution of trialkylamine in mixtures of l-octanolln-heptane a t temperatures 25,50, and 75 O C have been measured. Mathematical models of diverse complexity are presented, and their goodness of fit is tested and mutually compared. The best fits display the models comprising the formation of three acid-amine complexes and the nonideality of organic phase. In the cases of lactic and malic acids the acid-amine complexes (l,l), (2,1), and (2,2) and in the case of citric acid the complexes (l,l), (1,2), and (2,3) have been included. The incorporation of dissociation in the aqueous phase and of its nonideality has been found to have little effect on the model accuracy. The effects of temperature and solvent composition on the extraction equilibria have been studied, and exponential relations for their prediction have been derived. All the three systems display sensitivity to both temperature and solvent composition. Accordingly the principles of "temperature and diluent swings" are applicable to the processes of extractive recovery and purification of the acids investigated.
The Canadian Journal of Chemical Engineering, 1993
Air quality projections of sulphur dioxide, nitrogen dioxide, PM10 and ground-level ozone for Pra... more Air quality projections of sulphur dioxide, nitrogen dioxide, PM10 and ground-level ozone for Prague and the Central Bohemia region till 2030 were developed using the SUDPLAN (Sustainable Urban Development Planner) modelling tool which enables simulation of the impact of emissions and climate change on the concentration of both primary and secondary pollutants in the atmosphere at both macroscopic and microscopic scales. Emission projections till 2030 were taken from the GAINS (Greenhouse Gas-Air Pollutants Interactions and Synergies) model. In addition, the impact on air quality was simulated for three typical situations: Substantial change in operation of a large combustion plant (close-down or doubled thermal input), completion of the Prague city highway bypass and hypothetic construction of three satellite settlements in the outskirts of Prague.
Document complet disponible sur OLIS dans son format d'origine Complete document available o... more Document complet disponible sur OLIS dans son format d'origine Complete document available on OLIS in its original formatCOM/ENV/TD(2003)36/FINAL This study analyses the development of trade in environmental goods and services in Czech Republic and the impact of its liberalization on the country. Demand for environmental goods, mostly end-of-pipe equipment surged as the government introduced emergency environmental regulations in 1991-1992, which triggered significant investment in environmental goods and services in the private sector. The sudden opening of Czech markets through trade liberalization, in the absence of a long-term, integrated strategy, however, has upset the demand-supply equilibrium although it has improved conditions for investment in end-of-pipe technology. Experience with Czech Republic reveals that in order to benefit from trade liberalization of environmental goods and services, an appropriate regulatory framework and policy should be put in place.