Elements characterization in urban aerosol
Hlaváčková, Hana; Cigánková, Hana; Mikuška, Pavel; Hegrová, J.
2023 - Czech Elements are important components of atmospheric aerosols. Heavy metals are known environmental pollutants due to their toxicity and their ability to accumulate in the human body. Heavy metals can exhibit toxicological afects even in trace amounts. Prvky jsou důležitými složkami atmosférických aerosolů. Těžké kovy jsou známé látky znečišťující životní prostředí díky své toxicitě a schopnosti akumulovat se v lidském těle. Těžké kovy mohou vykazovat toxikologické účinky i ve stopových množstvích. Keywords: ascorbic acid; oxidative potential; urban aerosol Available in digital repository of the ASCR Elements characterization in urban aerosol

Elements are important components of atmospheric aerosols. Heavy metals are known environmental pollutants due to their toxicity and their ability to accumulate in the human body. Heavy metals can ...

Hlaváčková, Hana; Cigánková, Hana; Mikuška, Pavel; Hegrová, J.
Ústav analytické chemie, 2023

Forecast model of DOC in the inflow to the Římov water reservoir and in the withdrawal of water from the reservoir.
Hejzlar, Josef; Porcal, Petr; Kopáček, Jiří; Jarošík, Jiří; Paule-Mercado, Ma
2023 - Czech Long-term and seasonal changes in dissolved organic carbon (DOC) concentration and their causes in the years 1969–2021 were evaluated for the main tributary to the Římov water supply reservoir. Pro hlavní přítok do vodárenské nádrže Římov byly vyhodnoceny dlouhodobé a sezónní změny koncentrace rozpuštěného organického uhlíku (DOC) a jejich příčiny v letech 1969–2021. Keywords: water; dissolved organic matter; reservoir Available at various institutes of the ASCR Forecast model of DOC in the inflow to the Římov water reservoir and in the withdrawal of water from the reservoir.

Long-term and seasonal changes in dissolved organic carbon (DOC) concentration and their causes in the years 1969–2021 were evaluated for the main tributary to the Římov water supply reservoir.

Hejzlar, Josef; Porcal, Petr; Kopáček, Jiří; Jarošík, Jiří; Paule-Mercado, Ma
Biologické centrum, 2023

Hmotnostně spektrometrické zobrazování
Vrkoslav, Vladimír; Strnad, Štěpán; Kučera, L.
2022 - Czech Available at various institutes of the ASCR Hmotnostně spektrometrické zobrazování

Vrkoslav, Vladimír; Strnad, Štěpán; Kučera, L.
Ústav organické chemie a biochemie, 2022

Biomanipulation efficiency for the control of aquatic ecosystem and water quality in water supply reservoirs?
Hejzlar, Josef; Blabolil, Petr; Čtvrtlíková, Martina; Jůza, Tomáš; Kasalický, Vojtěch; Kubečka, Jan; Seďa, Jaromír; Znachor, Petr
2022 - Czech The effect of biomanipulation of fish stocks in three stratified dimictic reservoirs on water quality was shown to be small. Vliv biomanipulace rybí obsádkou ve třech stratifikovaných dimiktických nádržích na kvalitu vody se ukázal jako malý. Keywords: water quality; biomanipulation; fish Available at various institutes of the ASCR Biomanipulation efficiency for the control of aquatic ecosystem and water quality in water supply reservoirs?

The effect of biomanipulation of fish stocks in three stratified dimictic reservoirs on water quality was shown to be small.

Hejzlar, Josef; Blabolil, Petr; Čtvrtlíková, Martina; Jůza, Tomáš; Kasalický, Vojtěch; Kubečka, Jan; Seďa, Jaromír; Znachor, Petr
Biologické centrum, 2022

Optimization of the outflow regime in the Římov reservoir from the point of view of water supply.
Hejzlar, Josef; Jarošík, Jiří; Mercado, Ma. Cristina Paule; Porcal, Petr
2022 - Czech A model analysis of the influence of the discharge regime and climate change on the Římov reservoir, Czech Republic, showed the optimal way of managing the reservoir from the point of view of water quality. Modelová analýza vlivu vypouštěcího režimu a změny klimatu na nádrži Římov, Česká republika, ukázala optimální způsob řízení nádrže z hlediska kvality vody. Keywords: water quality control; climate change; model catchment-lake Available at various institutes of the ASCR Optimization of the outflow regime in the Římov reservoir from the point of view of water supply.

A model analysis of the influence of the discharge regime and climate change on the Římov reservoir, Czech Republic, showed the optimal way of managing the reservoir from the point of view of water ...

Hejzlar, Josef; Jarošík, Jiří; Mercado, Ma. Cristina Paule; Porcal, Petr
Biologické centrum, 2022

Composition and efficiency of organic matter removal at DWTP Studena.
Porcal, Petr; Jarošík, Jiří; Stará, J.
2022 - Czech The paper describes the composition and removal efficiency of natural organic matter in the treatment of drinking water at the DWTP Studena. Příspěvek popisuje složení a účinnosti odstranění přírodních organických látek při úpravě pitné vody v ÚV Studená. Keywords: drinking water; DWTP; natural organic matter Available at various institutes of the ASCR Composition and efficiency of organic matter removal at DWTP Studena.

The paper describes the composition and removal efficiency of natural organic matter in the treatment of drinking water at the DWTP Studena.

Porcal, Petr; Jarošík, Jiří; Stará, J.
Biologické centrum, 2022

CE-MS separation and identification of standard nucleotides
Butnariu, Maria; Šolínová, Veronika; Koval, Dušan
2022 - English Keywords: capillary electrophoresis; mass spectrometry; nucleotides Available at various institutes of the ASCR CE-MS separation and identification of standard nucleotides

Butnariu, Maria; Šolínová, Veronika; Koval, Dušan
Ústav organické chemie a biochemie, 2022

Analysis of textile waste streams in the Czech Republic
Shtukaturova, Anastasia
2022 - Czech In 2020, the EU adopted new Circular Economy Action Plan (CEAP), the principles of which must be implemented into the legislation of each Member State. The main goal of CEAP is to maximize the recycling of all types of usable waste, including textile waste, where its sorting will be mandatory from the year 2025. In the Czech Republic, a new waste treatment law based on the CEAP appeared in the year 2021. The new waste treatment law determines\nimportant changes to existing collection and treatment methods of textile waste. V roce 2020 EU přijala nový Akční plán pro oběhové hospodářství, zásady, které musí být implementovány do legislativy každého členského státu. Hlavním cílem Akčního planu pro oběhové hospodářství je maximalizace recyklace všech druhů využitelných odpadů, včetně textilních odpadů, kde jejich třídění bude povinné od roku 2025. Proto se v České republice v roce 2021 objevil nový zákon o nakládání s odpady vycházející ze zásad Akčního planu.\nNový zákon určuje důležité změny pro sběr a úpravy textilních odpadů. Keywords: textile waste; circular economy action plan; recycling Available in a digital repository NRGL Analysis of textile waste streams in the Czech Republic

In 2020, the EU adopted new Circular Economy Action Plan (CEAP), the principles of which must be implemented into the legislation of each Member State. The main goal of CEAP is to maximize the ...

Shtukaturova, Anastasia
Ústav chemických procesů, 2022

Mathematical Modeling of Heat and Mass Transfer in a Rotary Kiln
Kozakovič, M.; Čada, J.; Kokavcová, A.; Havlica, Jaromír; Huchet, F.
2022 - English The main objective of this research was to compare the results of the proposed 1D transport model with numerical simulations of mass transport in a direct-heat rotary kiln at laboratory scale. Another objective was to investigate the effect of the number of flights on the formation of an active particle surface in the airborne phase, which enables efficient heat transport. The studied rotary kiln is a low-angle cylinder with a length of 0.5 meter and a diameter of 0.108 meter with regularly arranged flights on the inside. The heat is transported into the rotary kiln by hot air at the inlet. The load in the rotary kiln consists of spherical particles with 1 millimeter diameter. The rotary kiln rotation speed is 21.5 rpm. For each simulation, 20 rotations were performed. The Discrete Element Method implemented in an open-source code LIGGGHTS was used for simulations.Efficient heat transfer is made possible primarily by the large number of particles in the airborne phase, which are heated by the warm air blowing in. To begin with, the number of flights and their geometry were found to be a key parameter controlling the amount of particles in the gaseous regime. It was also found that an area in the right part of the base of the cylinder is formed which is not reached by particles from the flights. This phenomenon is due to the dynamics of particle transport, as the particles are not maintained in the active phase and move rapidly towards the load due to gravity. In conclusion, the effect of this zone is negative, as hot air flows through it without resistance, preventing the system from heating effectively. Keywords: granular dynamics; discrete element method; particulates system; rotary kiln Available in a digital repository NRGL Mathematical Modeling of Heat and Mass Transfer in a Rotary Kiln

The main objective of this research was to compare the results of the proposed 1D transport model with numerical simulations of mass transport in a direct-heat rotary kiln at laboratory scale. Another ...

Kozakovič, M.; Čada, J.; Kokavcová, A.; Havlica, Jaromír; Huchet, F.
Ústav chemických procesů, 2022

Portable liquid chromatograph and analyses of hazardous substances
Šesták, Jozef; Gogaľová, Zuzana; Kahle, Vladislav; Lunerová, K.
2022 - Czech Progress in technology of microchips, batteries and LEDs in the last two decades enable development of portable instruments which can satisfy the requirements of modern liquid chromatography (LC). Application of portable LC is advantageous if simple and rapid sample treatment procedure followed by a short HPLC run can be executed in the point of sampling. Our research group have developed a concept of portable HPLC based on simple hydraulic scheme and a unique optical detector for simultaneous detection of absorbance and fluorescence of compounds eluted off microcolumn. Considering in-field analysis of hazardous substances, this instrument can be advantageous for analysis of compounds which are difficult to detect and quantify by other contemporary portable instruments utilizing different working principles due to incompatibility with their physico-chemical properties (e. g. microbial toxins). Pokrok v technologiích mikročipů, baterií a LED diod v posledních dvou dekádách již umožňuje vývoj přenosných přístrojů, které dokážou uspokojit náročné požadavky moderní kapalinové chromatografie (HPLC). Postupné rozšíření přenosných HPLC lze očekávat všude tam, kde v místě odběru vzorku postačí jeho rychlá a snadná úprava s následnou krátkou HPLC analýzou.\nNaše výzkumná skupina vyvinula koncept přenosného HPLC, jehož základem je jednoduché hydraulické schéma a originální optický detektor umožňující současnou detekci absorbujících i fluoreskujících látek po jejich separaci na mikrokoloně. V oblasti analýzy nebezpečných látek v terénních podmínkách může tento typ přístroje rozšířit interval sledovaných látek o ty, které z nejrůznějších fyzikálních/fyzikálně-chemických důvodů nelze detekovat/stanovit pomocí přenosných přístrojů pracujících na jiných principech (např. toxiny bakterií a sinic). Keywords: portable liquid chromatograph; optical detector; toxins Available in digital repository of the ASCR Portable liquid chromatograph and analyses of hazardous substances

Progress in technology of microchips, batteries and LEDs in the last two decades enable development of portable instruments which can satisfy the requirements of modern liquid chromatography (LC). ...

Šesták, Jozef; Gogaľová, Zuzana; Kahle, Vladislav; Lunerová, K.
Ústav analytické chemie, 2022