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Wyszukujesz frazę "Wojtal, Łukasz" wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Pilot study on feasibility of application of gas chromatography for the assessment of acrylamide concentration in sewage sludge
Autorzy:
Włodarczyk, Elżbieta
Próba, Marta
Wolny, Lidia
Wojtal, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/1039275.pdf
Data publikacji:
2014
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
acrylamide
polyelectrolyte
sewage sludge
gas chromatography
Opis:
The aim of this study was to determine the possibility of using gas chromatography to measurement of the acrylamide concentration in sewage sludge. Acrylamide, as a toxic substance, is not indifferent to human health, but it is used in the production of plastics, dyes, adhesives, cosmetics, mortar, as well as a coagulant for water treatment, wastewater or sewage sludge conditioning. Determination of acrylamide by gas chromatography was based on standard: EPA Method 8032A "Acrylamid by gas chromatography." It consists of a bromination reaction of the compound in the presence of dibromopropendial derivative, a triple extraction with the ethyl acetate, a concentration of the eluate sample up to the 1 ml volume, and an analysis by the gas chromatography using an electron capture detector (ECD). The acrylamide concentration of was calculated according to the formula presented in the mentioned standard. All samples were performed twice (the difference between the results was not greater than 10%), and the average value of the four samples was 17.64 µg/L−1. The presence of acrylamide in sewage sludge has been confirmed.
Źródło:
Acta Biochimica Polonica; 2014, 61, 2; 201-203
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Use of Coffee Waste in the Reduction of Metallurgical Slags
Autorzy:
Matula, Tomasz
Kortyka, Łukasz
Myćka, Łukasz
Łabaj, Jerzy
Wojtal, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/27314120.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
coffee grounds
copper slag
reduction copper slag
calorimeter
fusy z kawy
żużel miedziowy
redukcja żużla miedziowego
kalorymetr
Opis:
Coffee is grown in over 50 countries around the world, and its sale is the largest in the world trade after crude oil. In the case of coffee beans, after consumption remains a solid waste in the form of a waste plant extract. At present, coffee waste is not fully managed, which means that it is often deposited in landfills. Taking into account their availability on the market and the content of significant amounts of carbon in them, it was proposed to use them as a reducing agent in the processing of copper slags. The use of Solid Coffee Grounds (SCG) as an alternative reducing agent for coke and coke breeze can be beneficial in two aspects. The first is the reduction of carbon dioxide emissions in the process, and the second is due to the possible release of hydrocarbons from these wastes at high temperatures, which, apart from participating in the reduction process itself, causes also mixing of the bath in the melting unit, which facilitates the process of copper sedimentation in the slag. The experiments carried out on a laboratory scale showed the possibility of reducing the copper content in the slag after the reduction process from 10.3 to 0.41 % by mass. The obtained values of the relative degree of copper splashing for all experiments ranged from 88.4 to 96.0 %. The presented solution is an innovative approach to the use of SCG in the processing of copper slags.
Źródło:
Archives of Foundry Engineering; 2023, 23, 1; 103--109
1897-3310
2299-2944
Pojawia się w:
Archives of Foundry Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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