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Wyszukujesz frazę "Hubicki, Z." wg kryterium: Autor

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    Wyświetlanie 1-7 z 7
    Tytuł:
    Reduction of chromium(VI) ions from aqueous solutions by using the solvent impregnated resin
    Autorzy:
    Wójcik, G.
    Hubicki, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/115625.pdf
    Data publikacji:
    2011
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    sorption of chromium(VI) ions
    reduction
    Opis:
    The solvent impregnated resins enables effective recovery of microquantities of chromium(VI) ions from wastewaters. The solvent impregnated resin (SIR) Amberlite XAD 7 HP as polymer matrix has been prepared by the wet-impregnation technique. Aliquat 336 was employed as the extractant and acetone as the solvents for impregnation. Sorption of chromium(VI) was investigated in the batch process . Sorption of chromium(VI) was studied in the pH range from 1.5 to 7. It was stated that sorption of chromium(VI) ions depends on acidity of solution. The values of recovery factors of chromium(VI) are higher at low pH than in neutral solution. The speciation of chromium was investigated in the studied pH range. Reduction of chromium(VI) to chromium(III) under acidic conditions was observed. Chromium was determined by using the spectrophotometric and atomic absorption spectroscopy methods. Both methods permit to observe changing of valence of chromium(III) and (VI) oxidation states. The prepared SIR is a new sorbent used for recovery of chromium ions from wastewaters.
    Źródło:
    Challenges of Modern Technology; 2011, 2, 3; 41-43
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Recovery of gold (III), palladium (II) and platinum (IV) ions from chloride solutions on the solvent impregnated resin (SIR) — Dowex Optipore L493
    Autorzy:
    Wójcik, G.
    Hubicki, Z.
    Górska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/115536.pdf
    Data publikacji:
    2011
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    gold
    platinum
    palladium
    solvent impregnated resins
    Opis:
    The method described in this paper using Dowex Optipore L493 for removal of gold (III), palladium (II), and platinum (IV) ions from hydrochloric solutions is found effective for separation of gold, palladium and platinum. There were carried out laboratory studies of selective removal of platinum (IV), gold (III) and palladium (II) microquantities from 0.1–6 M hydrochloric on the solvent impregnated highly cross-linked styrenic polymer, Dowex Optipore L493 using Cyanex 301. In these experiments the recovery factors % R of gold (III), palladium (II) and platinum (IV) depending on phases contact time were obtained. The gold, palladium and platinum concentrations were determined by the AAS method.
    Źródło:
    Challenges of Modern Technology; 2011, 2, 3; 38-40
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sorption of the acid dyes onto strongly basic anion exchanger: Kinetic and equilibrium studies
    Autorzy:
    Greluk, M.
    Hubicki, Z.
    Wołowicz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/115757.pdf
    Data publikacji:
    2011
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    adsorption isotherms
    adsorption kinetics
    acid dyes
    resin
    Opis:
    The strong base acrylic anion exchangers, Amberlite IRA-458, was used as an adsorbent for the investigation of acid dyes (Acid Orange 7, Acid Orange 10 and Acid Red 88) adsorption kinetics and isotherms. The pseudo-fi rst order and pseudo-second order kinetic models were used to analyze the kinetic data and good agreement between the experimental and calculated amounts of dye adsorbed at equilibrium were obtained for the pseudo-second order kinetic models for the entire investigated concentrations domain in the case all three investigated dyes. The adsorption equilibrium data were analyzed by the Langmuir and Freundlich isotherm models with the best fitting being the first one.
    Źródło:
    Challenges of Modern Technology; 2011, 2, 1; 74-78
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Equilibrium and kinetic studies of palladium(II) ions sorption onto Dowex resins
    Autorzy:
    Wołowicz, A.
    Hubicki, Z.
    Greluk, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/115919.pdf
    Data publikacji:
    2011
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    palladium
    sorption
    pseudo-first order kinetic equation
    pseudo-second order kinetic equation
    isotherms
    Opis:
    Palladium(II) sorption was studied in hydrochloric acid solutions with sodium chloride addition onto Dowex MSA-1 and Dowex MSA-2 resins by means of the static method. The dependence between the amount of palladium(II) ions sorbed at time tin a disequilibrium state (qt) as well as the sorption capacities (qe) and phases contact time were obtained. The results were applied in kinetic studies using the pseudo-fi rst (Lagergren equation) and pseudo-second order kinetic equations (linear form of Blanchard equation proposed by Ho, PSO). Moreover, the equilibrium studies were caried out at ambient temperature and fitted to the Langmuir and Freundlich isotherms. The AFM pictures of the surface of anion exchange resins before and after the loading process were also recorded. Both resins exhibit high selectivity towards palladium(II) ions. The sorption capacities are in the range 7–10 mg/g for both resins under discussion in all examined solutions. Th e pseudo-second order kinetic equation and the Langmuir isotherm show the best fit with the experimental data.
    Źródło:
    Challenges of Modern Technology; 2011, 2, 2; 71-75
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of Varion resins selectivity towards palladium(II) ions in hydrochloric acid solutions with sodium chloride addition
    Autorzy:
    Wołowicz, A.
    Hubicki, Z.
    Greluk, M.
    Wawrzkiewicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/115425.pdf
    Data publikacji:
    2011
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    palladium(II)
    sorption
    Varion resin
    strongly and weakly basic anion exchange resins
    Opis:
    Ion exchange is Ion exchange is found more and more signifi cant importance in metal processing, and hydrometallurgy in general, not only for the removal of impurities but also for the reconcentration process of metal ions. The ion exchange method (dynamic method) was applied in the preconcentration of palladium(II) ions from the chloride solutions with sodium chloride addition. Varion resins such as the strongly basic anion exchange resins: Varion ADM and Varion ATM and the weakly basic anion exchange resin Varion ADAM were taken into account during the sorption process. The selectivity series were obtained based on the breakthrough curves of palladium(II) ions determined by means of dynamic method. Moreover, the distribution coefficients: weight and bed as well as the working anion exchange capacities were calculated. From the Varion resins — Varion ADAM is the most promising in the preconcentration of Pd(II).
    Źródło:
    Challenges of Modern Technology; 2011, 2, 3; 34-37
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of weakly basic anion exchanger for removal of Remazol Black B
    Autorzy:
    Greluk, M.
    Hubicki, Z.
    Wawrzkiewicz, M.
    Wołowicz, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/115782.pdf
    Data publikacji:
    2011
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    Remazol Black B
    anion exchanger
    sorption
    Opis:
    The weakly basic anion exchangers of the functional tertiary amine gropus with the polystyrene skeleton: Amberlyst A-21 and with acrylic skeleton: Amberlite IRA-67 were investigated as adsorbents of Remazol Black B from aqueous solutions. Experiments were carried out as function of contact time (1–240 min.), initial dye concentration (50–500 mg/dm3), pH (1–12), temperature (298–318 K) and ionic strength (NaCl). The results indicate that the investigated anion exhchangers are suitab;e as adsorbent material of Remazol Black B from aqueous solutions
    Źródło:
    Challenges of Modern Technology; 2011, 2, 3; 29-33
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Sunset Yellow sorption on weak base anion exchanger — kinetic and equilibrium studies
    Autorzy:
    Wawrzkiewicz, M.
    Wołowicz, A.
    Greluk, M.
    Hubicki, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/115804.pdf
    Data publikacji:
    2011
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    dye
    anion exchanger
    adsorption
    kinetics
    Opis:
    The sorption equilibrium and kinetics of Sunset Yellow dye in aqueous solutions on the weak base anion exchange resin — Amberlite FPA51 were examined in this paper. The influences of phase contact time, solution pH, initial dye concentration and temperature were studied by the batch method. The amounts of dye sorbed at equilibrium changed from 9.9 to 48.7 mg/g with the increasing initial concentrations in the range 100–500 mg/L. The experimental data were analyzed by the Langmuir, Freundlich, Temkin and Dubinin-Radushkevich models of adsorption. The maximum monolayer capacity was 130.6 mg/g. The sorption free energy was equal to 14.6 kJ/mol and revealed the nature of the ion exchange mechanism in this system. The kinetic data were modelled using the pseudo-first order, pseudo-second order and intraparticle diffusion equations.
    Źródło:
    Challenges of Modern Technology; 2011, 2, 2; 66-70
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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