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    Wyświetlanie 1-3 z 3
    Tytuł:
    The effect of molding conditions on the quality of geopolymer surfaces
    Autorzy:
    Jaglarz, Janusz
    Wyszyński, Dominik
    Lach, Michał
    Mikuła, Janusz
    Duraj, Ryszard
    Powiązania:
    https://bibliotekanauki.pl/articles/173702.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    surface topography
    bidirectional reflectance distribution function
    ellipsometry
    spectrophotometry
    Opis:
    The presented work describes the method of measuring surface topography with application of BRDF (bidirectional reflectance distribution function), ellipsometry and spectrophotometry. This non-contact method enables measurement and analysis of large area surfaces, such as plasters and facades. A standard method of topography analysis does not describe sufficiently all of the interesting features. The visual aspect of the surface evaluation is very important from the functional and utilitarian point of view. The proposed methods of surface analysis enable not only the quantitative evaluation but also indirectly the qualitative properties (visual aspects).
    Źródło:
    Optica Applicata; 2020, 50, 1; 135-146
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of structure and properties of membrane active substance on analytical performance of ion-selective electrodes
    Autorzy:
    Wardak, Cecylia
    Grabarczyk, Małgorzata
    Lenik, Joanna
    Powiązania:
    https://bibliotekanauki.pl/articles/110902.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    ion-selective electrode
    acidic chelating ionophore
    PVC membrane
    potentiometry
    spectrophotometry
    Opis:
    The potential creating properties of a group of acidic chelating compounds are presented. The studies have been carried out by the constructing of new ion-selective electrodes based on PVC membranes doped with the studied compounds, and determining the basic analytical parameters of the electrodes. The usefulness of eight out of nine investigated compounds in the preparation of the membrane phase electrodes selective for cobalt, zinc and cadmium has been shown. It has been also found that the acidic properties of ionophore have an essential influence on the analytical parameters of the constructed electrodes. The response mechanism of the obtained electrodes has been investigated by simultaneous spectrophotometric-potentiometric measurement of membranes used in electrodes. It has been found that during the conditioning of electrode, a complex of active substance with primary ion is formed in the membrane phase, then the membrane composition is established and remains unchanged in the next measurements.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2019, 55, 6; 1413-1421
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Immobilization of rambutan (Nephelium lappaceum) peel as a sorbent for Basic Fuchsin removal
    Autorzy:
    Lee, H.-J.
    Ong, S.-T.
    Powiązania:
    https://bibliotekanauki.pl/articles/207651.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    fuchsin
    Fourier transform infrared spectrophotometry
    FTIR
    Nephelium lappaceum
    fuksyna
    spektroskopia w podczerwieni z transformatą Fouriera
    Opis:
    The potential of rambutan (Nephelium lappaceum) peel as a low-cost adsorbent in an immobilized condition to remove Basic Fuchsin from aqueous solution was studied. The effect of initial dye concentration, contact time, pH and adsorbent dosage for the dye removal was studied at room temperature (26±2 °C). Infrared spectrum of rambutan peel indicates the presence of C–O, –OH and C=C functional groups. The adsorption rate was found to be high at the first 30 min and the process reached equilibrium after 3 h with more than 80% of dye being removed. The uptake of Basic Fuchsin was more promising at pH slightly above 7. The study of sorption model and kinetic model showed that the adsorption of Basic Fuchsin on rambutan peel conformed to the Freundlich isotherm and pseudo-second order kinetics with a high correlation coefficient, R,sup>2 > 0.98. This indicates the Basic Fuchsin adsorbs chemically on the heterogeneous surface of rambutan peel. The maximum adsorption capacity determined from the Langmuir isotherm was 108.696 mg/g. It seems that rambutan peel has the potential to substitute activated carbon as an alternative low-cost adsorbent in the treatment of the dye effluent.
    Źródło:
    Environment Protection Engineering; 2017, 43, 1; 169-181
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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