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Change in Size-Resolved Filtration Efficiency of Respirators after Decontamination/Disinfection Treatments
Ondráček, Jakub; Ondráčková, Lucie; Dřevínek, M.; Otáhal, P.; Vošáhlík, J.
2022 - anglický
Furthermore, during COVID pandemic many people were using the PPEs for longer time than it was suggested by the manufacturer or tried to use home-made or web \ncommunity recommended decontamination/disinfection/antiviral treatments. Such treatments may severely destroy the structure of the filtration material and alter the \nfiltration properties as compared to the original piece of the PPE and thus not protect the wearer properly against harmful particles. This work aims to estimate the change in the \nsize-resolved filtration efficiency of different respirators after application of selected decontamination/disinfection treatments.
Klíčová slova:
respirators; size-resolved FE; decontamination
Plné texty jsou dostupné v digitálním repozitáři NUŠL
Change in Size-Resolved Filtration Efficiency of Respirators after Decontamination/Disinfection Treatments
Furthermore, during COVID pandemic many people were using the PPEs for longer time than it was suggested by the manufacturer or tried to use home-made or web \ncommunity recommended ...
Analýza materiálových toků textilních odpadů v České Republice
Shtukaturova, Anastasia
2022 - anglický
Objemy textilních odpadů se v posledních desetiletích neustále zvyšují kvůli nadměrné spotřebě textilních výrobků v souvislosti s nízkonákladovou rychlou módou, rostoucí populací a vyšší životní úrovní obyvatelstva. Jak samotný textilní průmysl, tak i textilní odpady přispívají ke znečišťování životního prostředí a produkci skleníkových a odpadních plynů. V roce 2020 EU přijala nový Akční plán pro oběhové hospodářství, zásady kterého musí být implementovány do legislativy každého členského státu. Hlavními cílí Akčního plánu jsou šetrnější a efektivnější zužitkování zdrojů a maximalizace recyklace všech druhů využitelných odpadů, včetně textilních. Proto se v České Republice v roce 2021 vstoupil v platnost nový odpadový zákon vycházející ze zásad Akčního plánu. Nový zákon o nakládání s odpady určuje důležité změny pro nakládání s textilními odpady v zemi. Pro zjištění současného stavu s textilními odpady byla vytvořena analýza materiálových toků. Výsledky ukázaly, že produkce průmyslových textilních odpadů byla 70 405 tun v roce 2010 a 87 840 tun v roce 2019, takže u tohoto druhu textilního odpadu tedy nedošlo k velkému nárůstu. Produkce textilních odpadů z domácností byla 37 393 tun v roce 2019 a je téměř desetkrát vyšší ve srovnání s rokem 2010. Navíc provedené analýzy vzorků směsného komunálního odpadu (SKO) ukázaly, že SKO obsahuje kolem 7 % různých druhů použitých textilií, které mohou být vhodné k recyklaci. Získané výsledky potvrzují, že Česká republika zatím není dostatečně připravena na plnění cílů Akčního plánu v případě textilních odpadů, a to kvůli jeho neustále rostoucím objemům a chybějícím recyklačním technologiím\n Volumes of textile waste have been continuously increasing over last few decades because of the overconsumption of textile products linked to low-cost fast fashion, growing population and higher living standards. Both textile industry and waste generation contribute to environmental pollution and production of greenhouse and waste gases. In 2020, the EU adopted the new Circular Economy Action Plan (CEAP) for the transition to the circular economy where the waste considers to be a valuable resource. Principles of the CEAP need to be implemented into the legislation of each Member state. In the Czech Republic, a new waste treatment law based on the CEAP was adopted in 2021. The new waste treatment law determines important changes for the textile waste treatment in the country. To prepare the Czech Republic for these significant changes, a material flow analysis (MFA) was created to determine the current state with textile waste streams. The results showed that the production of industrial textile waste was 70 405 tons in the year 2010 and 87 840 tons in the year 2019, so there is no big increase for this type of textile waste. The production of textile waste from households was 37 393 tons in the year 2019 and it is almost ten times higher in a comparison with the year 2010. Moreover, the analysis of municipal solid waste (MSW) samples showed that they contained about 7% of different types of used textiles which may be suitable for recycling. Obtained results confirm that the Czech Republic is not enough prepared for meeting the objectives of the CEAP in a case of textile waste because of its constantly growing volumes and lack of recycling technologies.\n\n
Klíčová slova:
textile waste streams; analysis; new waste treatment law
Plné texty jsou dostupné v digitálním repozitáři NUŠL
Analýza materiálových toků textilních odpadů v České Republice
Objemy textilních odpadů se v posledních desetiletích neustále zvyšují kvůli nadměrné spotřebě textilních výrobků v souvislosti s nízkonákladovou rychlou módou, rostoucí populací a vyšší životní ...
NIVB Meeting 2022
Šímová, Šárka
2022 - anglický
The first annual meeting of the National Institute of Virology and Bacteriology (NIVB) in Kutná Hora on 30.11.–2.12. is an opportunity for participating teams to meet, discuss excellent science, establish collaborations, and introduce the project to the members of our newly established International Science Advisory Board. The primary objective of NIVB is to mediate the cooperation among the 28 participating research teams from 8 Czech research institutions: Institute of Organic Chemistry and Biochemistry, Institute of Molecular Genetic, and Biological Centre of the Czech Academy of Sciences, Charles University in Prague, Masaryk University in Brno, the University of Chemistry and Technology in Prague, and Palacký University in Olomouc. We are delighted that it was possible to arrange the meeting of all the participating research groups, which reflects the scientific breadth of NIVB. The research interests of the participating groups can be broadly assigned into the programs of (1) Pathogen-host interactions, (2) Immunity against viruses and bacteria, and (3) Treatments for viral and bacterial infections. We thank all participants for contributing 28 presentations and 65 posters to the meeting. This conference is a pioneering endeavor, the first meeting that will bridge the virology and bacteriology communities from the Czech Republic. While the research interests of all the participating groups are focused on virology and bacteriology, the contributing laboratories are very diverse in the research methodologies they employ. Therefore, the meeting has the potential to enable the establishment of new scientific collaborations among the participating teams, which is the main objective of NIVB.\nNIVB Meeting 2022 has the ambition to launch a new series of annual meetings on virology and bacteriology and aims at informing wider scientific community about new development, trends and issues in these scientific fields.
Klíčová slova:
virology; bacteriology; National Institute of Virology and Bacteriology (NIVB); NIVB meeting
Plné texty jsou dostupné v digitálním repozitáři Akademie Věd.
NIVB Meeting 2022
The first annual meeting of the National Institute of Virology and Bacteriology (NIVB) in Kutná Hora on 30.11.–2.12. is an opportunity for participating teams to meet, discuss excellent science, ...
Trapping of volatile cadmium species on gold surfaces for atomic absorption spectrometry
Sagapova, Linda; Svoboda, Milan; Matoušek, Tomáš; Kratzer, Jan
2022 - anglický
Simple preconcentration step was developed for cadmium determination after chemical vapor generation prior to atomic absorption spectrometric detection. Chemical vapor generation of cadmium was performed in the presence of Cr3+/KCN as modifiers.
Klíčová slova:
chemical vapor generation; cadmium; atomic spectrometry
Plné texty jsou dostupné v digitálním repozitáři Akademie Věd.
Trapping of volatile cadmium species on gold surfaces for atomic absorption spectrometry
Simple preconcentration step was developed for cadmium determination after chemical vapor generation prior to atomic absorption spectrometric detection. Chemical vapor generation of cadmium was ...
Removal of PFASs from sewage sludge by pyrolysis
Hušek, Matěj
2022 - anglický
Our work aimed to describe PFASs behaviour at different pyrolysis temperatures (200 to 700 °C). We analysed 37 PFAS in sewage sludge samples and pyrolysis products. The temperature at which PFASs were removed from the sewage sludge at more than 99.0% was 400 °C, and at 600 °C, removal was more than 99.9%. As a result, it is recommended for commercial sludge pyrolysis units (larger volume, lower material homogeneity) that the process temperature be not lower than 600 °C. This recommendation is supported and demonstrated by the analyses of samples from the Bohuslavice Trutnov WWTP (CZE), where the sludge pyrolysis unit is in operation.\n
Klíčová slova:
sewage sludge samples; pyrolysis; temperature
Plné texty jsou dostupné v digitálním repozitáři NUŠL
Removal of PFASs from sewage sludge by pyrolysis
Our work aimed to describe PFASs behaviour at different pyrolysis temperatures (200 to 700 °C). We analysed 37 PFAS in sewage sludge samples and pyrolysis products. The temperature at which PFASs were ...
Application of hydrodynamic cavitation in brewing
Štěrba, Jiří
2022 - anglický
The aim of this work is to apply these advantages in the brewery industry. In the field of beer brewing, we would like to investigate several phenomena, such as the isomerization of bitter hop acids, the reduction of gluten concentration or the cell-walls breakdown.\n
Klíčová slova:
hydrodynamic cavitation; brewery industry; Venturi jet system
Plné texty jsou dostupné v digitálním repozitáři NUŠL
Application of hydrodynamic cavitation in brewing
The aim of this work is to apply these advantages in the brewery industry. In the field of beer brewing, we would like to investigate several phenomena, such as the isomerization of bitter hop acids, ...
Vertical distribution of black carbon (BC)
Julaha, Kajal
2022 - anglický
Black Carbon (BC) is one of the leading contributors affecting our climate system. Absorbing at all visible wavelengths results in a warmer environment and thus has been considered the second most important contributor to global warming after carbon dioxide. The primary sources of BC aerosol are the incomplete combustion of fossil fuels and biomass burning. However, the composition of atmospheric aerosols varies with the height above the Earth’s surface. Recent studies have shown significant uncertainties (about 25%) in model simulations of the vertical BC distribution, both on the regional and global levels. BC’s vertical transport is suggested to be one area where the models still differ significantly,4,5 highlighting further investigation.
Klíčová slova:
black carbon; fossil fuels and biomass; atmospheric aerosol
Plné texty jsou dostupné v digitálním repozitáři NUŠL
Vertical distribution of black carbon (BC)
Black Carbon (BC) is one of the leading contributors affecting our climate system. Absorbing at all visible wavelengths results in a warmer environment and thus has been considered the second most ...
Continuous electrocoagulation of Chlorella vulgaris in a novel channel-flow reactor
Lucáková, Simona
2022 - anglický
In our laboratory, we employed an electrocoagulation process with iron sacrificial anode leading to the separation of Chlorella vulgaris cells with high efficiency and at the same time acceptable low contamination of separated biomass by iron. Comparing to only centrifugation, the total energy costs of harvesting using electrocoagulation as a pre-concentration step prior to centrifugation were reduced by more than 80%. After extensive study of the influence of relevant process parameters.
Klíčová slova:
chlorella vulgaris; electrocoagulation; biomass; iron
Plné texty jsou dostupné v digitálním repozitáři NUŠL
Continuous electrocoagulation of Chlorella vulgaris in a novel channel-flow reactor
In our laboratory, we employed an electrocoagulation process with iron sacrificial anode leading to the separation of Chlorella vulgaris cells with high efficiency and at the same time acceptable low ...
Tetracycline degradation using catalysts of platinum coated over CeO2 and CeO2ZrO2
Bourassi, Mahdi
2022 - anglický
These works showed that, by adding well defined nanoparticles into ionic liquids, it is possible to tune or/and enhance their thermophysical properties and make them more suitable for electrical and thermal energy storage, and heat transfer applications.
Klíčová slova:
catalytic experiments; tetracycline; water depollution
Plné texty jsou dostupné v digitálním repozitáři NUŠL
Tetracycline degradation using catalysts of platinum coated over CeO2 and CeO2ZrO2
These works showed that, by adding well defined nanoparticles into ionic liquids, it is possible to tune or/and enhance their thermophysical properties and make them more suitable for electrical and ...
Ambient organic aerosol origin at rural background site in the Czech Republic
Lhotka, Radek
2022 - anglický
Source apportionment of organic aerosols (OA) at background sites is one of the important tasks of the current air quality protection. OA are emitted directly from primary sources or formed in the atmosphere via the oxidation of gas-phase precursors with subsequent partitioning resulting in low-volatility products into the particle phase.
Klíčová slova:
organic aerosol; air quality protection; ural background site
Plné texty jsou dostupné v digitálním repozitáři NUŠL
Ambient organic aerosol origin at rural background site in the Czech Republic
Source apportionment of organic aerosols (OA) at background sites is one of the important tasks of the current air quality protection. OA are emitted directly from primary sources or formed in the ...
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