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    Wyświetlanie 1-5 z 5
    Tytuł:
    Spectrophotometric Analysis of the Kinetic of Pd(II) Chloride Complex Ions Sorption Process from Diluted Aqua Solutions Using Commercially Available Activated Carbon
    Autorzy:
    Wojnicki, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/354034.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    palladium
    recovery
    recycling
    adsorption
    sorption
    chloride ions
    spectrophotometry
    Opis:
    In this paper, results of adsorption kinetic studies of Pd(II) chloride complex ions on activated carbon Organosrob 10 CO are presented. Spectorphotometrical method was applied to investigate the process. Kinetic model was proposed, and fundamental thermodynamic parameters were determined. Proposed kinetic model describes well observed phenomenon in the studied range of concentration of Pd(II) chloride complex ions as well, as concentration of activated carbon.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 4; 2405-2411
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Mechanism of Redox Reaction between Palladium(II) Complex Ions and Potassium Formate in Acidic Aqueous Solution
    Autorzy:
    Wojnicki, M.
    Podborska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/356614.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    analysis
    spectrophotometry
    palladium
    chloride
    speciation
    TD-DFT
    recycling
    recovery
    kinetics
    formate
    Opis:
    The kinetics studies of redox reaction between palladium(II) chloride complex ions and potassium formate in acidic aqueous solutions was investigated. It was shown, that the reduction reaction of Pd(II) is selective in respect to Pd(II) complex structure. The kinetic of the process was monitored spectrophotometrically. The influence of chloride ions concentration, Pd(II) initial concentration, reductant concentration, ionic strength as well as the temperature were investigated in respect to the process dynamics. Arrhenius equation parameters were determined and are equal to 65.8 kJ/mol, and A = 1.12×1011 s-1.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 2A; 737-745
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kinetic Studies of Pt(IV) Chloride Complex Ions Reduction Reaction Using Potassium Formate
    Autorzy:
    Wojnicki, M.
    Żabiński, P.
    Csapó, Edit
    Powiązania:
    https://bibliotekanauki.pl/articles/351194.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    platinum
    recovery
    recycling
    activation energy
    reaction mechanism
    Opis:
    In this paper, the kinetics of the platinum(IV) chloride complex ions reduction reaction was studied. It was shown that the mechanism exhibits autocatalytic character. The presence of metallic platinum in the system significantly increases the reaction rate. The influence of the initial concentration of precursor, reductant, ionic strength, initial concentration of the chloride ions as well as the temperature on the process rate was investigated. The activation energy was determined and is equal to 93.57 kJ/mol. Moreover, the obtained metallic phase was analyzed, and it was observed that it has a micrometric size.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 3; 1135-1140
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Separation of Ho3+ in Static Magnetic Field
    Autorzy:
    Kołczyk, K.
    Wojnicki, M.
    Kutyła, D.
    Kowalik, R.
    Żabiński, P.
    Cristofolini, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/355096.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    rare earth metals
    REE
    recycling
    separation
    magnetic field
    Opis:
    The rare earths elements (REE) belong to the group of critical metals and they are achieving more and more interest due to their special properties. However, there occur some problems connected with their production. The most difficult phase is separation of REE. It includes a necessity to intensify currently applied processes and looking for new solutions. The present work introduces an idea to use differences in physical properties of the REE ions to get them separated. In the experimental part of the work some efforts were undertaken to analyse results presenting changes of holmium ions concentration under an influence of the magnetic field gradient. There was determined the gradient of magnetic field and concentration of Ho3+ ions depending on initial concentration of the solution and time. A simulation of changing the concentration of holmium ions in the solution under an influence of the magnetic field gradient was performed to compare the mathematical model with the obtained results.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 4; 1919-1924
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Study of Gold, Copper and Nickel Adsorption, from their Acidic Chloride Solutions, Onto Activated Carbon
    Autorzy:
    Wojnicki, M.
    Socha, R. P.
    Luty-Błocho, M.
    Partyka, B.
    Polański, M.
    Deszcz, P.
    Kołczyk, K.
    Żabiński, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/356223.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    adsorption
    gold(III) chloride ions
    recovery
    recycling
    Opis:
    In this paper, a simple and effective method for gold recovery is described. The paper describes a way to recover gold onto activated carbon from a synthetic solution of gold(III) chloride. The method can also be used on nickel(II) as well as copper(II) chloride of where the metal ion ratios are comparable to the metal ratios found in some electronic waste. With the use of activated carbon in the process of electrolyte purification it is possible to selectively remove gold in metallic form from the solution. XPS studies have confirmed that metallic gold is present on the carbon surface. A spectrophotometric method was used to determine the concentration of Au(III) in the solution. Different concentration of nickel(II) as well as copper(II) were investigated. In all cases, adsorption and reduction of Au(III) to the metallic form was observed.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 1; 73-81
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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