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Wyszukujesz frazę "Rejek, M." wg kryterium: Autor

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    Wyświetlanie 1-3 z 3
    Tytuł:
    Degradation of sertraline in water by suspended and supported TiO2
    Autorzy:
    Rejek, M.
    Grzechulska-Damszel, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/780043.pdf
    Data publikacji:
    2018
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    photocatalysis
    titanium dioxide
    pharmaceuticals
    sertraline
    water treatment
    Opis:
    Pharmaceutical pollutants have been detected in many countries in surface and ground water after treatment in wastewater treatment plants. The presented studies concern the photocatalytic removal of one of SSRI antidepressants - sertraline from water using TiO2  photocatalyst. The process was conducted using two laboratory installations with periodic and flow reactors. Two forms of TiO2  was used in the photocatalytic reactions: suspended and supported onto a glass fabric. The studies shown that with increasing initial concentration of pharmaceutical, photoactivity decreases. For the initial concentration of 0.025 g/dm3 , the best results – 94% removal – was achieved for the process conducted in the periodic reactor with TiO2  supported onto a glass fabric.
    Źródło:
    Polish Journal of Chemical Technology; 2018, 20, 2; 107-112
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Testing of beveled crimp connections made on a prototype stand
    Autorzy:
    Wróbel, N.
    Rejek, M.
    Królczyk, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/94124.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
    Tematy:
    prototype stand
    fixed joint
    inseparable tight joints
    crimped joints
    bent joints
    formed joints
    zaciśnięte stawy
    zgięte stawy
    Opis:
    The purpose of this study is to form and test inseparable tight joints, commonly used in the construction of heat exchangers, by crimping operation on designed prototype stand. Crimped joints are made by tools in form of cones with two types of shapes, each of the designed tools have got identical forming angle. This study uses two types of connecting blocks and plates, differing in diameters of hole and flange. Elaboration contains a case study of joints being made by the stand, which in addition to the crimping operations for some cases were glued or brazed. The article presents the features of the formed joints, by examining them by destructive testing: Micrography, tensile strength test, and non-destructive testing: Leakage test. The examined elements have been made of aluminum 6060, which is well suited to indirect or direct operations of forming joints for all kinds of coolers or condensers. Elaborated tests and studies in this study allowed to state, that joining the connection block to plate with the small diameter, was more energy-consuming than in sample sets with bigger diameter, use of glue increasing the strength of the joints by 20%, significant strength increase can be obtained after mechanical clinching with brazing operation or modification of geometrical shape of the jaws.
    Źródło:
    Archives of Mechanical Technology and Materials; 2018, 38; 15-22
    2450-9469
    Pojawia się w:
    Archives of Mechanical Technology and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Influence of Wall Thickness and Mould Temperature on Structure and Properties of Thin Wall Ductile Iron Castings
    Autorzy:
    Górny, M.
    Kawalec, M.
    Witek, G.
    Rejek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/382589.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    metallography
    mechanical properties
    ductile iron
    austenitic ductile iron
    high Ni alloying
    mould temperature
    thin wall casting
    metalografia
    właściwości mechaniczne
    metal ciągliwy
    żeliwo sferoidalne
    Opis:
    The excellent property combination of thin wall ductile iron castings (TWDI), including thin wall alloyed cast iron (e.g. austenitic TWDI) has opened new horizons for cast iron to replace steel castings and forgings in many engineering applications with considerable cost benefits. TWDI is considered as a potential material for the preparation of light castings with good mechanical and utility properties, the cost of which is relatively low. In this study, unalloyed and high Ni-alloyed (25% Ni) spheroidal graphite cast iron, with an austenitic metallic matrix were investigated. The research was conducted for thin-walled iron castings with 2, 3 and 5mm wall thickness, using different mould temperature (20°C, and 160°C) to achieve various cooling rates. The metallographic examinations i.e. characteristic of graphite nodules, metallic matrix, and primary grains of austenite dendrites (in high-nickel NTWDI) and mechanical properties were investigated. The study shows that homogeneity of the casting structure of thin-walled castings varies when changing the wall thickness and mould temperature. Finally, mechanical properties of thin-walled ductile iron castings with ferritic-pearlitic and austenitic metallic matrix have been shown.
    Źródło:
    Archives of Foundry Engineering; 2019, 2; 55-59
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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