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Vertical distribution of black carbon (BC)
Julaha, Kajal
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.
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Analysis of textile waste streams in the Czech Republic
Shtukaturova, Anastasia
Our results confirm that the Czech Republic is not well prepared to fulfill the ambitious goals of the CEAP in respect to textile waste because of continually growing volumes of this type of the waste and hardly available official data about its production, lack of recycling technologies and obsolete waste collection system.\n
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Application of hydrodynamic cavitation in brewing
Štěrba, Jiří
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
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Removal of PFASs from sewage sludge by pyrolysis
Hušek, Matěj
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
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Chiral membrane prepared by electrostatic modification of ionexchange membrane
Čížek, Jan
In this work, a simple and effective method for chiral membrane preparation is demonstrated, involving electrostatic interaction between negatively charged sulfobutylether-β-cyclodextrin (SBE-β-CD) as a chiral selector and a commercially available anionexchange membrane.The modified home-made chiral membrane was tested in diffusion cells to characterize its enantioselectivity towards D,L–Tryptophan. We demonstrated in our work that L–Tryptophan is preferentially absorbed into the membrane, while D–Tryptophan\nis transported through the membrane with enantiomeric excess exceeding 80%. To increase the permeation rate of the membrane, thinner ion-exchange membrane substrate with higher degree of swelling is proposed.\n
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