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    Wyświetlanie 1-6 z 6
    Tytuł:
    Study of 2–thiocytosine/ surfactant adsorption at the R-AgLAFe/chlorate(VII) interface – impact of surfactant ionic character
    Autorzy:
    Martyna, Marlena
    Grochowski, Mariusz
    Urban, Teresa
    Nosal-Wiercińska, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/2146942.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    mixed adsorption layers
    2-thiocytosine
    SDS
    CTAB
    adsorption parameters
    R-AgLAFe electrode
    Opis:
    Effect of 2 – thiocytosine on the parameters of double R-AgLAFe/ chlorate(VII) interface layer in the presence of different surfactants has been studied. There were determined the adsorption parameters such as: differential capacity of the double layer (Cd) at the R-AgLAFe/ basic electrolyte interface; potential of zero charge (Ez) and surface tension at the potential of zero charge (γz). The predominance of 2–thiocytosine in formation of adsorption equilibria of 2–thiocytosine–SDS and 2– thiocytosine–CTAB mixtures as well as the competitive adsorption between molecules 2–thiocytosine-surfactant or mixed micelles was proved. The changes pointing out to different arrangement of SDS or CTAB molecules on the electrode surface also in the presence of 2–thiocytosine were observed.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2022, 58, 2; art. no. 144322
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Membranes obtained on the basis of cellulose acetate and their use in removal of phenol from liquid phase
    Autorzy:
    Przybył, Joanna
    Bazan-Wozniak, Aleksandra
    Nosal-Wiercinska, Agnieszka
    Pietrzak, Robert
    Powiązania:
    https://bibliotekanauki.pl/articles/2146950.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    cellulose acetate membrane
    phase inversion
    physical and chemical properties
    surface
    chemistry
    phenol removal
    Opis:
    The membranes based on cellulose acetate (CA) were obtained by the method of phase inversion and used for removal of phenol (in concentrations of 15 and 25 mg/L) from liquid phase. To differentiate the hydrophilic properties of the membrane surfaces, different amounts of cellulose acetate (14 and 18 wt. %) and polyvinylpyrrolidone as a pore-generating agent (PVP, 1, 2, 3 or 4 wt. %) were used. The membranes were characterised by determination of their porosity, equilibrium water content, wetting angle and content of surface oxygen functional groups. After the application of membranes to phenol removal, the following parameters characterising the process were determined: permeability, membrane resistance, coke resistances, pore resistances, total filtration resistance and flux recovery ratio. The membranes were found to show higher effectiveness in phenol removal from a solution of the initial concentration 15 mg/L, and more effective were the membranes with higher contents of cellulose acetate. On the surface of the membranes the oxygen functional groups of acidic nature are dominant, both before and after filtration. The membranes of higher contents of cellulose acetate show higher resistances.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2022, 58, 2; art. no. 144174
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Temperature influence on the electrode process in the presence of 6-thioguanine and surfactants
    Autorzy:
    Nosal-Wiercińska, Agnieszka
    Kaliszczak, Waldemar
    Martyna, Marlena
    Szabelska, Anna
    Gołębiowska, Beata
    Wiśniewska, Małgorzata
    Powiązania:
    https://bibliotekanauki.pl/articles/1845199.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    catalytic effect
    Bi(III) electroreduction
    6-thioguanine
    surfactants
    thermodynamic parameters
    kinetic parameters
    Opis:
    The measurements concerning the process of the electroreduction of Bi(III) ions in the presence of 6–thioguanine (6TG) and Triton X-100 as well as Tween 80 in the 2 $mol·dm^{-3}$ chlorates(VII) demonstrate a dependence of the process rate on temperature. The applied electrochemical techniques (DC polarography, cyclic and SWV voltammetry) allowed to determine the kinetic and thermodynamic parameters as well as their correlation with changes in kinetics of the electrode process. The catalytic activity of 6TG was confirmed by the decrease of overall enthalpies of activation. Different values of $\DeltaH^{\ne}$ and $\DeltaS^0$ for Bi(III) electroreduction in the presence of 6–thioguanine as well as Triton X-100 and Tween 80 suggest changes in kinetics of the electrode process towards inhibition.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2020, 56, 6; 14-21
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of azathioprine on the parameters of double Hg/chlorate(VII) interface layer in the presence of nonionic surfactants
    Autorzy:
    Kaliszczak, Waldemar
    Grochowski, Mariusz
    Nosal-Wiercińska, Agnieszka
    Brycht, Mariola
    Checinska-Majak, Dorota
    Gołębiowska, Beata
    Powiązania:
    https://bibliotekanauki.pl/articles/109820.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    azathioprine
    mixed adsorption layers
    Triton X-100
    Tween 80
    adsorption parameters
    water activity
    Opis:
    The mixed adsorption of azathioprine and Triton X-100 or Tween 80 at the mercury/ chlorates (VII) interface wasdescribed. The differential capacitance of the double layer Cd at the Hg/ basic electrolyte interface was measured using the electrochemical impedance spectroscopy. The potential of zero charge Ez wasdetermined applying streaming mercury electrode and the surface tension at the potential of zero charge γz was measured by the method of the highest pressure inside the mercury drop. The changes of determined parameters in the function of the supporting electrolyte concentration point with the participation of ClO4-ions in the adsorption process, as well as the electrostatic interactions between the dipoles of H2O and azathioprine–Triton X-100 or azathioprine–Tween 80 in the double layer are shown.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2019, 55, 6; 1350-1356
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adsorption of 4-aminopyrimidine at the R-AgLAFE/chlorate(VII) interface. Comparison of the adsorption properties of various water activity as well as different surfactants
    Autorzy:
    Martyna, Marlena
    Pawlak, Alicja
    Grochowski, Mariusz
    Bazan-Woźniak, Aleksandra
    Pietrzak, Robert
    Nosal-Wiercińska, Agnieszka
    Powiązania:
    https://bibliotekanauki.pl/articles/24085664.pdf
    Data publikacji:
    2023
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    4-aminopyrimidine
    SDS
    CTAB
    R-AgLAFE
    specific adsorption
    Opis:
    The results of 4-aminopyrimidine (4-APM) impact studies on the double layer parameters at the R-AgLAFE/ chlorates(VII) interface in the solutions with different water activity as well as different properties of the mixed adsorption layer of 4-aminopirimidine – sodium 1-decanesulfonate (SDS) and 4- aminopyrimidine - hexadecyltrimethylammonium bromide (CTAB) at the electrode/solution interface are discussed.The differential capacity of the double layer (Cd) at the R-AgLAFE/ basic solution interface was measured using the electrochemical impedance spectroscopy. The zero charge potential (Ez) was determined using a streaming electrode, while the surface tension at the zero charge potential (Yz) was measured using the largest pressure method inside the mercury drop. It was proved that both the 4-aminopirymidine concentration and water activity have an essential effect on the doublelayer parameters on the R-AgLAFE/ chlorates(VII) interface. In the studied systems: 4-APM - SDS and 4-APM - CTAB, 4-aminopyrimidine dominance was observed.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2023, 59, 4; art. no. 170204
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adsorption and electrokinetic studies of sodalite/lithium/poly(acrylic acid) aqueous system
    Autorzy:
    Wiśniewska, Małgorzata
    Franus, Wojciech
    Fijałkowska, Gracja
    Ostolska, Iwona
    Wójcik, Grzegorz
    Nosal-Wiercińska, Agnieszka
    Gościańska, Joanna
    Powiązania:
    https://bibliotekanauki.pl/articles/1450512.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    sodalite
    zeolite from fly ash
    lithium acquisition
    zeta potential
    solid surface charge density
    poly(acrylic acid) adsorption
    mixed adsorbates
    Opis:
    The synthetic zeolite-sodalite obtained by the hydrothermal conversion of fly ash with aqueous sodium hydroxide was used in the experiments. Its adsorption properties in relation to lithium ions were examined. The effects of: solution pH, presence of polymeric substance – poly(acrylic acid) and order of individual adsorbates addition were determined. To specify the binding mechanism of lithium ions on the sodalite surface, besides adsorption experiments, the measurements leading to the solid surface charge density and zeta potential determination, were performed. As a result, the structure of mixed adsorption layer composed of polymer+metal complexes was characterized. The presented study concerns two important issues: management of environmentally harmful wastes such as coal combustion products as well as searching for new sources of lithium and effective methods of its acquisition.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2020, 56, 6; 158-166
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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