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    Wyświetlanie 1-27 z 27
    Tytuł:
    Separation of lead(II) and copper(ii) by plasticizer membranes with sulphur ana-logus of phosphinic acids as carriers
    Autorzy:
    Kolodziejska, M.
    Kozlowski, C.
    Ulewicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/110836.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    plasticizer membranes
    organophosphorous acids
    lead(II)
    copper(II)
    Opis:
    Investigation of selective removal of Pb(II) and Cu(II) from acidic nitrate aqueous solutions using transport across polymer inclusion membranes PIMs was performed. The sulphur analogus of phosphinic acids, i.e. bis(2,4,4-trimethylpentyl)monothiophosphinic acid (1) and tert-butyl(phenyl)- phosphinothioic acid (2) as well as their mixture were incorporated into polymer inclusion membranes composed of cellulose triacetate as a support and o-nitrophenyl octyl ether as a plasticizer. In the experi-ments the transport of Cu(II) across PIM with 1 was rapid and complete, however the lead(II) removal increased with increased membrane saturation. Selective transport of Cu(II) over Pb(II) through PIMs with binary carrier system (1 + 2) was observed; the selectivity order was: Cu(II) >> Pb(II). At tempera-ture of 50C the selectivity coefficient Cu(II)/Pb(II) for membrane with binary carriers was the highest and was equal to 758.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2013, 49, 1; 267-276
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Copper (II) Oxide particles as Adsorbent for Removal of Alkali Blue; Isotherm and Kinetic Studies
    Autorzy:
    Ibrahim, M. A.
    Ibrahim, M. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1158766.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Adsorption
    Copper (II) Oxide particles
    FTIR
    Isotherm
    Kinetics
    Opis:
    Adsorption behaviour of copper (II) oxide particles (CuO-Ps) for the removal of Alkali Blue (AB) was studied. Different adsorption variables such as contact time, initial concentration and pH for the adsorption process were investigated by batch adsorption studies. FTIR was carried out to determine the functional groups present at the surface of the particle with functional groups such as –OH, C=C, C-H, C≡C detected. The percentage removal and optimum contact time for the removal of AB was 84.8% at 10 min. The experimental isotherms data were analyzed using Langmuir, Temkin, Freundlich and Dubinin-Radushkevich (D-R) isotherms and it was observed that AB fits closely to Langmuir with R2 value of 0.884. Kinetics studies shows that the adsorption process fits better to pseudo-second order with the experimental values of qe 4.242 been closer to the calculated values of the qe 4.108. Effect of pH shows that it adsorb better at the initial pH of 5.30. Lower value of mean square energy of 0.707 kJ/mol indicates that the adsorption process is physical. The results indicated that copper (II) oxide particle can be used as a low-cost adsorbent for the removal of AB from aqueous solutions.
    Źródło:
    World Scientific News; 2018, 114; 208-217
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis, Characterization and DFT Calculations of 4-((2-Hydroxyethyl)imino)naphthalen-1(4H)-One and its Cu(II) Complex
    Autorzy:
    Gorgulu, G.
    Dede, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1029785.pdf
    Data publikacji:
    2018-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    Schiff base
    quinone
    metal complex
    spectroscopy
    copper(II)
    DFT
    Opis:
    We have reported herein the synthesis of a novel quinone derivative ligand containing the Schiff base and its Cu(II) complex starting from 1,4-naphthoquinone. Synthesized compounds were characterized using the Fourier transform infrared, UV-Vis, elemental analysis, inductively coupled plasma optical emission spectrometry, molar conductivity, and magnetic susceptibility measurements. The free ligand was also characterized by ¹H- and ¹³C-NMR spectra. Elemental analyses, stoichiometric and spectroscopic data indicated that the metal:ligand ratio is 1:2 and octahedral structure is proposed for the metal complex of the Schiff base ligand. Computational quantum calculations were also performed using DFT/B3LYP level of theory with 6-311++G(d,p) basis set for the synthesized ligand. It was found that the experimental and theoretical spectroscopic data were consistent.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 2; 239-243
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Spectroscopic Properties and Quantum Chemical Calculations of Novel Diimine Molecules and their Mononuclear Cu(II) Complexes
    Autorzy:
    Dede, B.
    Gorgulu, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1029792.pdf
    Data publikacji:
    2018-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    Schiff base
    diimine
    metal complex
    spectroscopy
    copper(II)
    DFT
    Opis:
    Two novel Schiff base ligands, 2,2'-((pentane-2,4-diylidene)bis(azanylylidene))bis(4-chlorophenol) and 2,2'-((pentane-2,4-diylidene)bis(azanylylidene))bis(4-methylphenol) were prepared by condensation reaction of acetylacetone with 2-amino-4-chlorophenol and 2-amino-4-methylphenol, respectively. Mononuclear Cu(II) complex of each ligand was also synthesized. These compounds were characterized by elemental analyses, inductively coupled plasma optical emission spectrometry, the Fourier transform infrared spectra, UV-Vis, molar conductivity, and magnetic susceptibility measurements. The ligands have been further characterized by ¹H- and ¹³C-NMR. The results suggest that the metal complexes of the ligands have a metal:ligand ratio of 1:1 and the Cu(II) ions are coordinated by the phenolic oxygen atoms and imine nitrogen atoms of the ligands. Moreover, the quantum chemical calculations of the compounds have been performed using the density functional theory. It has been found that the calculated spectroscopic values are in a good agreement with experimental data.
    Źródło:
    Acta Physica Polonica A; 2018, 133, 2; 256-262
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selective removal of Ag(I) and Cu(II) by plasticizer membranes with n-(diethylthiophosphoryl)-aza[18]crown-6 as a carrier
    Autorzy:
    Kolodziejska, M.
    Kozlowski, C.
    Kozlowska, J.
    Ulewicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/110729.pdf
    Data publikacji:
    2014
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    plasticizer membranes
    lariat ether
    separation
    silver(I)
    copper(II)
    Opis:
    The competitive transport of equimolar mixtures of Ag(I) and Cu(II) ions from aqueous source phase (cMe = 0.001 mol/dm3) across polymer inclusion membranes PIMs with N-(diethylthiophosphoryl)aza[18]crown-6 as ion carriers, was studied. The influence of pH of source phase and metal concentration on an efficiency of silver(I) transport through polymer inclusion membranes containing cellulose triacetate as the support and o-nitrophenyl pentyl ether as the plasticizer was studied. The transport selectivity order for the PIM with N-(diethylthiophosphoryl)-aza[18]crown-6 was: Ag(I) >> Cu(II). The metal cations transport rate can be explained by size and nature of substituent in lariat ether molecule, which prefer formation of Ag(I) complex in the membrane phase.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2014, 50, 1; 237-247
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zinc(II) selective removal from other transition metal ions by solvent extraction and transport through polymer inclusion membranes with D2EHPA
    Autorzy:
    Ulewicz, M.
    Walkowiak, W.
    Pośpiech, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/346997.pdf
    Data publikacji:
    2003
    Wydawca:
    Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
    Tematy:
    polymer inclusion membrane
    solvent extraction
    zinc(II)
    cobalt(II)
    nickel(II)
    copper(II)
    cadmium(II)
    Opis:
    An experimental investigation concerns zinc(II), cobalt(II), nickel(II), copper(II) and cadmium(II) ions separation from aqueous chloride solutions by solvent extraction and transport through polymer inclusion membrane (PIM) processes. The selective transport of metal ions from the aqueous chloride source phase through PIM containing cellulose triacetate (support), o-nitrophenyl pentyl ether (plasticizer) and di(2-ethylhexyl)phosphoric acid (ion carrier) is shown. Zn(II) can be effectively removed from dilute aqueous chloride solutions by its transport through PIMs with di(2-ethylhexyl)phosphoric acid as the ionic carriers into 1.0 M HCl as the receiving phase. The transport selectivity of Zn(II) over Co(II), Ni(II), Cu(II) and Cd(II) decreases while the pH of the solution increases in the source phase. Also, by solvent extraction, Zn(II) can be selectively removed from dilute aqueous chloride solutions.
    Źródło:
    Ars Separatoria Acta; 2003, 2; 47-55
    1731-6340
    Pojawia się w:
    Ars Separatoria Acta
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Transport of transition metal ions through polymer inclusion membranes with Cyanex 301
    Autorzy:
    Ulewicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/347064.pdf
    Data publikacji:
    2004
    Wydawca:
    Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
    Tematy:
    polymer inclusion membrane
    zinc(II)
    cadmium(II)
    copper(II)
    cobalt(II)
    nickel(II)
    Cyanex 301
    Opis:
    The selective transport of zinc(II) and cadmium(II) ions from aqueous chloride or sulfate source phase through polymer inclusion membranes (PIM) containing cellulose triacetate (support), o-nitrophenyl pentyl ether (plasticizer) and di(2,4,4-trimethylpentyl)dithiophosphinic acid - Cyanex 301 (ion carrier) is shown. Zn(II) and Cd(II) ions can be effectively removed from dilute chloride and sulfate aqueous solutions into 1.0 M HCl or H2SO4 as the receiving phase. The separation coefficients were practically constant for acid concentrations in the receiving phase ranging from 0.01 to 1.0 M Copper(II), zinc(II), cadmium(II), cobalt(II), and nickel(II) ions removal from aqueous chloride solutions in transport through PIMs is also shown. These metal ions can be effectively removed from dilute aqueous chloride solutions in transport through PIMs with di(2,4,4-trimethylpentyl)dithiophosphinic acid as the ionic carriers into 1.0 M HCl. The selectivity coefficients of Cu(II) over Zn(II), Cd(II), Co(II) and Ni(II) were low and decreased with an increase in the pH of source aqueous phase.
    Źródło:
    Ars Separatoria Acta; 2004, 3; 81-88
    1731-6340
    Pojawia się w:
    Ars Separatoria Acta
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selective transport of copper(II) ions across polymer inclusion membrane with aromatic β–diketones as carriers
    Autorzy:
    Radzymińska-Lenarcik, E.
    Witt, K.
    Bożejewicz, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/110355.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    β-diketone
    polymer inclusion membrane
    metal ions separation
    copper(II)
    cobalt(II)
    nickel(II)
    Opis:
    The transport of Cu(II) ions from an equimolar mixture of Co(II), Ni(II), and Cu(II) ions as well as from solutions containing only Cu(II) ions in the feed phase through polymer inclusion membranes (PIMs) with aromatic β–diketones as carriers has been investigated. The polymer membranes consisted of polyvinylchloride (PVC) as the support, bis(2-ethylhexyl)adipate (ADO) as plasticizer, and aromatic β–diketones (benzoylacetone (1) and dibenzoylmethane (2)) as ion carriers. The transport selectivity of PIMs with 1 and 2 was: Cu(II) > Co(II) > Ni(II). The highest recovery factors of Cu(II) ions were observed for 1 (94.0%), whereas for Co(II) and Ni(II) the factors were 21.4 and 7.3%, respectively. The Cu(II)/Co(II) and Cu(II)/Ni(II) selectivity coefficients were equal to 8.9 and 33.7 (for 1), 6.4 and 28.3 (for 2), respectively.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2018, 54, 3; 741-750
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Styrene oxidation by copper(II) complexes salen-type encapsulated into NaY zeolite
    Katalityczne utlenianie styrenu w obecności kompleksów miedzi(II) typu salen osadzonych na zeolicie NaY
    Autorzy:
    Kuźniarska-Biernacka, I.
    Carvalho, M. A.
    Correia Neves, I.
    Fonseca, A. M.
    Lisińska-Czekaj, A.
    Czekaj, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/352679.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    copper(II) complexes
    Schiff base
    NaY zeolite
    kompleksy miedzi(II)
    zasada Schiffa
    zeolit NaY
    Opis:
    The copper(II) complex with a Schiff-base salen-type ligand has been encapsulated in the nanopores of a NaY zeolite by using two different methodologies, the flexible ligand and in situ complex preparation methods. The encapsulated and non-encapsulated copper(II) complexes were screened as catalysts for styrene oxidation by using TBHP as the oxygen source in acetonitrile solvent. Under the optimized conditions, the catalysts exhibited moderate activity with higher selectivity to benzaldehyde. Both heterogeneous catalysts were found to be reusable after the catalytic cycle, but with some loss of activity.
    Osadzenie kompleksu miedzi(II) z zasadą Schiffa typu salen na zeolicie typu NaY zostało przepowadzone za pomocą dwóch metod „flexible ligand" i „in situ”. Katalityczne właściwości otrzymanego kompleksu oraz jego heterogenizowanych analogów badano w reakcji utleniania styrenu w obecności TBHP. Jako rozpuszczalnik stosowano acetonitryl. Testowane katalizatory wykazują średnią aktywność katalityczną z tendencją wytwarzania aldehy du benzoesowego. Oba heterogenizowane katalizatory mogą być wykorzystywane ponownie bez utraty aktywności katalitycznych.
    Źródło:
    Archives of Metallurgy and Materials; 2013, 58, 4; 1291-1294
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Infrared study of copper(II) complexes with pyridine-3-carboxamide derivatives in chloride media
    Autorzy:
    Borowiak-Resterna, A.
    Olszanowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/346901.pdf
    Data publikacji:
    2004
    Wydawca:
    Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
    Tematy:
    infrared spectra
    solvent extraction
    copper(II)
    pyridine-3-carboxamide derivatives
    benzamide derivatives
    Opis:
    The extraction studies for copper(II) from chloride solutions by mono- and dialkyl derivatives of benzamide and pyridine-3-carboxamide show that the coordination of copper by amide groups is very weak, weaker than by chloride ions. N,N-dialkyl derivative of benzamide does not extract copper from chloride media but N-alkylbenzamide eliminates a small amount of copper (a great deal smaller than pyridine-3-carboxamide derivatives) only from diluted chloride aqueous solutions ([Cl-] < 0.1 M). Infrared studies of copper complexes with mono- and dialkylpyridine-3-carboxamides show that coordination of the ligand molecules to copper(II) ions takes place mainly by the pyridine nitrogen. More stable monoalkylpyridinecarboxamides complexes with CuCl2 are formed probably by intermolecular hydrogen bonds between monomeric molecules of CuCl2L2 complex (L – the amide). However, weak coordination of copper(II) by the amide group may take place.
    Źródło:
    Ars Separatoria Acta; 2004, 3; 105-113
    1731-6340
    Pojawia się w:
    Ars Separatoria Acta
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Removal of copper from copper-contaminated river water and aqueous solutions using Methylobacterium extorquens modified Erzurum clayey soil
    Autorzy:
    Celebi, N.
    Nadaroglu, H.
    Kalkan, E.
    Kotan, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/205232.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    copper(II) removal
    adsorption
    erzurum clayey soil
    Methylobacterium extorquens
    modified clay
    wastewater
    Opis:
    The objective of this study was to investigate the possibility of using natural and bacteria-modified Erzurum clayey soil with Methylobacterium extorquens as an alternative to high cost commercial adsorbent materials for the removal of copper from aqueous solution. The copper concentrations in the samples of the polluted river water and CuCl2 solutions treated by the natural and bacteria-modified Erzurum clayey soil (ECS) have been determined by spectrophotometric method. Firstly, the surface of ECS was modified with M. extorquens and surface functionality was increased. Then, the adsorption of Cu (II) from solution phases was studied with respect to varying metal concentration, pH, and temperature and agitation time. The maximum adsorption of Cu (II) for natural and bacteria-modified Erzurum clayey soil was observed at pH: 5.0. At different copper concentrations, copper adsorption analysis was performed on 1 g using clay soil or modified clay soil. Maximum adsorption of Cu (II) was obtained as 45.7 and 48.1 mg g-1 at initial concentration (50 mg/50 mL) and optimal conditions by natural and bacteria-modified clay soil, respectively. The copper concentration was decreased in the substantial amount of the leachates solutions of natural and bacteria-modified clay soil. Langmuir and Freundlich isotherms were used to describe the adsorption behavior of Cu (II) ions. The results showed that modified clay soil had a high level of adsorption capacity for copper ion. The various thermodynamic parameters such as ΔG°, ΔH° and ΔS° were analyzed to observe the nature of adsorption. The structural properties of the natural and bacteria-modified-ECS have been characterized by SEM, FTIR and XRD techniques. Consequently, it was concluded that the bacteria-modified clay soil could be successfully used for the removal of the copper ions from the aqueous solutions.
    Źródło:
    Archives of Environmental Protection; 2016, 42, 4; 58-69
    2083-4772
    2083-4810
    Pojawia się w:
    Archives of Environmental Protection
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The use of the steric effect of the carrier molecule in the polymer inclusion membranes for the separation of cobalt(II), nickel(II), copper(II), and zinc(II) ions
    Autorzy:
    Radzyminska-Lenarcik, E.
    Ulewicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/778754.pdf
    Data publikacji:
    2015
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    polymer inclusion membrane
    separation ions
    steric effect
    copper(II)
    cobalt(II)
    nickel(II)
    cadmium(II)
    zinc(II)
    alkylimidazole
    Opis:
    In this study, palladium-modified nickel foam substrate was applied to examine ethanol oxidation reaction (EOR) in 0.1 The transport of cobalt(II), nickel(II), copper(II), and zinc(II) ions from chloride solutions across polymer inclusion membranes (PIMs), which 1-heptylimidazole (1̲) or 1-heptyl-2-methylimidazole (2̲) or 1-heptyl-4-methylimidazole (3̲) as the ion carrier was reported. The steric effect for carriers 2̲&enspand 3̲&enspdecreases the transport of all ions except Cu(II). The initial fluxes of metal ions transport across PIMs with the 1̲- 2̲&enspdecrease in the sequence: Cu(II) > Zn(II) > Co(II) > Ni(II), whereas for 3 they were Cu(II) > Zn(II) > Ni(II) > Co(II). The highest recovery values were obtained for Cu(II), this being 99 and 85% for carrier 1̲&enspand 2̲, respectively. In both membranes the degree of deposition of the Zn(II) ions was comparable. Zn(II), Co(II) and Cd(II) ions, which form complexes with coordination numbers 4 and 6, are more easily recovered with the use of carriers 2̲&enspand 3̲. Ni(II) ions, which form complexes with coordination number 6 only, practically remain in the feeding phase. PIMs with alkylimidazoles were characterized by non-contact atomic force microscopy.
    Źródło:
    Polish Journal of Chemical Technology; 2015, 17, 2; 51-56
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of Biosorbents and Ion-Exchanger Efficiency for Copper Ions Removal
    Porównanie wydajności biosorbentów oraz wymienników jonowych dla usuwania jonów miedzi
    Autorzy:
    Ivanova, D.
    Kadukova, J.
    Kavulicova, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/319389.pdf
    Data publikacji:
    2016
    Wydawca:
    Polskie Towarzystwo Przeróbki Kopalin
    Tematy:
    mchy
    zielone glony
    wymiennik kationowy
    usuwanie miedzi (II)
    mosses
    green alga
    cationic exchanger
    copper(II) removal
    Opis:
    Copper ions removal by different sorbents from model aqueous solutions was investigated. The decrease of copper ions after addition of biosorbents prepared from mosses Sphagnum sp., Polytrichum commune and a green alga Parachlorella kessleri was compared to copper removal by commercial cationic exchanger Amberlite IR 120. The maximum sorption capacity obtained was 7.4 mg.g-1 (96.1%) and 71 mg.g-1 (95.3%) for ion-exchanger at a solution with concentration of copper ions 16 mg.l-1 and 160 mg.l-1, respectively. A significant copper (II) uptake was achieved within 10 min after addition of biomass Parachlorella kessleri and Shpagnum sp. Their maximal uptake efficiency 92.8% and 85.4%, respectively is comparable to efficiency of ion-exchanger at low copper (II) concentration in solutions. However, at higher copper concentration ion-exchanger was more efficient in copper removal. The advantage of biomass is high biosorption capacity, high efficiency achieved very quickly and cost-effectiveness especially for solutions with low metal concentration (under 100 mg.l-1). These parameters determine biomass as economical alternatives for metal removal from solution during final, polishing step or drinking water preparation.
    Zbadano usuwanie jonów miedzi za pomocą różnych sorbentów z modelowego roztworu wodnego. Zmniejszenie liczby jonów miedzi po dodaniu biosorbentów przygotowanych z mchów Sphagnum sp., Polytrichum commune oraz zielonych alg Parachlorella kessleri porównano z usuwaniem miedzi za pomocą kationowych wymienników Amberlite IR 120. Maksymalna wydajność sorpcji została osiągnięta przy poziomie, odpowiednio, 7.4 mg.gg-1 oraz 160 mg.g-1. Znaczący wychwyt miedzi (II) został osiągnięty w czasie 10 minut po dodaniu biomasy Parachlorella kessleri oraz Shpagnum sp. Ich maksymalna skuteczność, odpowiednio 92.8% oraz 85.4% jest porównywalna do skuteczności wymienników jonowych przy niskim stężeniu miedzi (II) w roztworach. Jednakże, przy wyższym stężeniu miedzi wymiennik jonowy był bardziej skuteczny w usuwaniu miedzi. Przewagą biomasy jest wysoka wydajność biosorpcji, skuteczność osiągana bardzo szybko przy niskich kosztach, zwłaszcza dla roztworów o niskim stężeniu metali (poniżej 100 mg.lg-1). Parametry te determinują biomasę jako ekonomiczną alternatywę do usuwania metali z roztworu podczas finalnego kroku lub przygotowania wody pitnej.
    Źródło:
    Inżynieria Mineralna; 2016, R. 17, nr 1, 1; 129-133
    1640-4920
    Pojawia się w:
    Inżynieria Mineralna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modele eksperymentalne w badaniach zewnątrzkomórkowego transportu miedzi
    Experimental models in studies of extracellular copper transport
    Autorzy:
    Bal, Wojciech
    Powiązania:
    https://bibliotekanauki.pl/articles/2200581.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    copper(II)
    peptide
    complexation
    reaction kinetics
    biological mechanisms
    miedź(II)
    peptyd
    kompleksowanie
    kinetyka reakcji
    mechanizmy biologiczne
    Opis:
    The biological relevance of proteins and peptides for Cu(II) biology, including the extracellular transport of this element, is commonly estimated by studying stabilities and structures of their complexes. However, our experimental studies on the kinetics of formation of Cu(II) complexes of ATCUN/NTS and Xaa-His-R peptides, considered to be key actors in extracellular copper biology, revealed novel long-lived reaction intermediates. These intermediates, rather than the final reaction products fulfil the chemical criteria for actual biocomplexes derived from biological studies. Our research clearly demonstrated that understanding of the kinetic aspect of interactions is indispensable for realistic modeling of biological interactions of metal ions.
    Źródło:
    Wiadomości Chemiczne; 2022, 76, 5-6; 456-466
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Właściwości antyoksydacyjne, antybakteryjne i przeciwgrzybicze związków kompleksowych miedzi(II)
    Antioxidant, antibacterial and antifungal properties of complex compounds of copper(II)
    Autorzy:
    Piotrowska, A.
    Drzeżdżon, J.
    Jacewicz, D.
    Chmurzyński, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/171722.pdf
    Data publikacji:
    2017
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    związki kompleksowe
    miedź(II)
    antyoksydanty
    aktywność antybakteryjna
    aktywność przeciwgrzybicza
    copper(II) complexes
    antioxidants
    antibacterial activity
    antifungal activity
    Opis:
    Since late 1930s copper has been recognized as an essential trace metal in living organisms. Copper(II) cation plays the role as a coordination center not only in the single-nuclear complexes, but also in the multinuclear coordination compounds with a particular emphasis on the polymers as ligands. The selected complex compounds of copper(II) with ligands which are organic and inorganic species have been characterized taking into account their physico-chemical properties. In addition, the complex compounds containing ligands such as Schiff ’s bases, hydrocarbons, organic bases, and also polycarboxylic anions: oxydiacetate, thiodiacetate, iminodiacetate and dipicolinate have been described considering their role in the biological systems. Nowadays tested coordination compounds of copper(II) have interesting antibacterial activities against bacteria strains that are antagonistic to the human. The antibacterial activity of copper(II) complex is stronger than some of the known antibacterial substances e.g. ciprofloxacin. In addition, copper(II) complex compounds exhibit a 64-fold greater antimicrobial properties than copper(II) chloride. Moreover, these compounds have antifungal and antioxidant properties. The activities of antibacterial, antifungal, and antioxidant complex compounds of copper( II) have been compared to the reactivities of these compounds with complexes used as reference substances, e.g. L-ascorbic acid, in the assay using nitrotetrazolium blue.
    Źródło:
    Wiadomości Chemiczne; 2017, 71, 3-4; 219-240
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Bioactive 3-methyl-2,6-diarylpiperidin-4-one, oxime and its copper(II) complex
    Autorzy:
    Thirunarayanan, G.
    Lakshmanan, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1070862.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Antimicrobial activities
    Copper(II) complex
    Disc diffusion
    Drug dilution
    Piperidine-4-one
    Piperidine-4-oneoxime
    Opis:
    namely 3-methyl-2,6-diphenylpiperidin-4-oneoxime and copper(II) complex of this oxime was prepared by literature procedure. The purities of these ketone, oxime and copper complex was analyzed by physico-chemical and spectroscopic methods reported in the literature. The physicochemical analysis results confirmed that the structure of the complex was distorted octahedral. The antimicrobial activities of these substrates such as ketone, oxime and its copper complex were investigated using Bauer-Kirby disc diffusion technique against several antimicrobes by measuring the mm of zones of inhibitions. Further these activities were concluded using drug dilution method. From the analysis report, the copper (II) complex of the oxime shows significant antimicrobial activities against their antimicrobial stains. The oxime shows moderate antimicrobial activity. The ketone shows satisfactory antibacterial and antifungal activities against their stains in both disc diffusion and drug dilution methods.
    Źródło:
    World Scientific News; 2019, 123; 124-140
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zastosowanie metod elektrochemicznych w bioanalityce : wybrane zagadnienia
    Electrochemical methods in bioanalytics : selected aspects
    Autorzy:
    Ufnalska, I.
    Wiloch, M. Z.
    Wesoły, M.
    Ćwik, P.
    Zabadaj, M.
    Ciosek, P.
    Wawrzyniak, U. E.
    Wróblewski, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/171732.pdf
    Data publikacji:
    2015
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    elektrochemia
    elektroniczny język
    chemometria
    kompleksy peptydjony miedzi(II)
    warstwy boroorganiczne
    electrochemistry
    electronic tongue
    chemometrics
    peptide-copper(II) complexes
    boroorganic layers
    Opis:
    The cooperation of scientists specializing in different fields has given rise to the integration of previously distinct thematic areas and creation of new multidimensional disciplines as a result. Biochemistry, which has derived from the borderline of chemistry and biology, can be set as a good example. In this short review an insight into electrochemical studies, which are currently carried out in the Department of Microbioanalytics at the Faculty of Chemistry (Warsaw University of Technology), was presented. Three independent scientific pathways introducing electrochemical methods for biochemical and bioanalytical purposes can be distinguished among the ongoing researches. The first one embraces the design of the so-called electronic tongue – a system used for the qualitative and quantitative analysis of liquid samples of complex composition. In this work, potentiometric sensor arrays were applied to develop an electronic tongue system enabling the evaluation of the effectiveness of bitter taste masking of pharmaceuticals. The second scientific pathway involves voltammetric studies of the interactions of biologically active peptides with copper(II) ions. The interest was drawn to clarify and describe the role of β-amyloid and NSFRY copper(II) complexes, relevant to Alzheimer’s disease occurrence and cardiovascular system disorder respectively. Finally, boronic acids and their derivatives, exhibiting the affinity for molecules possessing 1,2 or 1,3-diol group in their structure, were used as selective molecular receptors in the third research project. The studies include the selection of the optimal method and conditions of the immobilization process, providing the most favorable receptor layer structure, and the determination of the performances of constructed electrochemical sensor towards particular bioanalytes.
    Źródło:
    Wiadomości Chemiczne; 2015, 69, 9-10; 931-946
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Separation of palladium(II) from mixtures of non-ferrous metal ions by solvent extraction
    Autorzy:
    Radzyminska-Lenarcik, E.
    Witt, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/115497.pdf
    Data publikacji:
    2016
    Wydawca:
    Fundacja na Rzecz Młodych Naukowców
    Tematy:
    metal separation
    cobalt(II)
    nickel(II)
    copper(II)
    palladium(II)
    solvent extraction
    alkylimidazole
    separacja metali
    kobalt(II)
    nikiel(II)
    miedź(II)
    pallad(II)
    ekstrakcja rozpuszczalnikiem
    alkiloimidazole
    Opis:
    The possibility of Pd(II) ions separation from mixtures of Co(II), Ni(II), Cu(II) and Pd(II) ions by solvent extraction was studied, using 1-hexyl-2methylimidazole in chloroform as the extractant. The initial concentration of each ion was 10 mM. The tests were carried out at a temperature of 25°C, at a constant strength of the aqueous solution of I = 0.5, as maintained by the KCl solution. It was demonstrated that differences in the stability and structure of their coordination sphere as well as solubility of complexes with the extractant could be used for separating the Co(II), Ni(II), Cu(II) and Pd(II) ions by solvent extraction. Pd(II), which forms flat-square complexes in the solutions, passes easily into the organic phase and is easier separated from the mixture of Co(II), Ni(II), Cu(II) ions, which form octahedral or tetrahedral complexes. Extraction percentages were calculated. For the respective metals, their values increase for increasing concentrations of the extractant in the aqueous phase. The extraction percentage decreases in the following order: Pd(II) > Cu(II) > Co(II) > Ni(II). In the case of the quaternary mixture, the highest extraction percentage for Pd(II) (70%) was obtained at a pH=7.33. Separation coefficients were also calculated. The highest separation coefficients were obtained for the system: Pd(II)/Ni(II), Pd(II)/Co(II); at a pH of 5.4 for an aqueous solution, their values are 13.3 and 7.7, respectively.
    Źródło:
    Challenges of Modern Technology; 2016, 7, 1; 17-22
    2082-2863
    2353-4419
    Pojawia się w:
    Challenges of Modern Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Białka błony zewnętrznej fusobacterium nucleatum jako potencjalny czynnik promocji nowotworu jelita grubego
    Outer membrane proteins of fusobacterium nucleatum as a potential factor of colorectal cancer promotion
    Autorzy:
    Lesiów, M. K.
    Krupa, K.
    Komarnicka, U. K.
    Walencik, P. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/171956.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Towarzystwo Chemiczne
    Tematy:
    Fusobacterium nucleatum
    białka błony zewnętrznej
    kompleksy miedzi(II)
    reaktywne formy tlenu
    Fusobacteriumnucleatum
    outer membrane proteins
    copper(II) complexes
    reactive oxygen species
    Opis:
    Fusobacterium nucleatum is a Gram-negative, anaerobic bacterium located in an oral cavity. This bacterium can migrate with blood to the different part of the human body e.g colon. The studies suggest participation of Fn in a colorectal cancer promotion, but a particular mechanism of this disease is still unclear. Colorectal cancer leads to million of new death cases each year. It is third in the worldwide in terms of mortality. The predictions for the coming years are not optimistic. The statistics encourage researchers to know the details of the mechanism of colorectal cancer. It is suggest, that outer membrane proteins of Fn are responsible for development of this disease. Transition metal ions such as Cu(I), Cu(II), Fe(II) can coordinate to proteins and generate free radicals by Fenton reaction. Reactive oxygen species (ROS) destroy important biological macromolecules such as DNA, proteins or lipids and cause different diseases. The paper presents characteristics of Fn and its outer membrane proteins, description of copper(II) complexes and their ability to ROS generation.
    Źródło:
    Wiadomości Chemiczne; 2018, 72, 7-8; 585-596
    0043-5104
    2300-0295
    Pojawia się w:
    Wiadomości Chemiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Badanie własności związków kompleksowych wybranych biopierwiastków ze składnikami napojów energetyzujących
    The study on properties of complex compounds of certain bioelements and the energetic drinks ingredients
    Autorzy:
    Giełzak-Koćwin, K.
    Poroś, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/410349.pdf
    Data publikacji:
    2017
    Wydawca:
    Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
    Tematy:
    napoje energetyzujące
    tauryna
    L-karnityna
    siarczan(VI) oksowanadu(IV)
    octan miedzi(II)
    energy drinks
    taurine
    L-carnitine
    oxovanadium(IV)
    copper(II)
    Opis:
    Napoje energetyzujące cieszą się w Polsce znaczną popularnością, zwłaszcza wśród studentów podczas wzmożonej pracy umysłowej czy sportowców intensywnie trenujących. Produkty te mogą mieć zarówno pozytywne, jak i negatywne oddziaływanie, stąd konieczność prowadzenia badań nad ich optymalnym składem i działaniem na organizm. W tej publikacji badano zdolności kompleksowania wybranych składników napojów energetyzujących, tauryny i L-karnityny z jonami metali bioaktywnych, miedzi(II) i oksowanadu(IV). Przeprowadzono pomiary spektrofotometryczne w zakresie widzialnym promieniowania elektromagnetycznego dla roztworów wodnych zawierających różne stężenia jonów metali oraz tauryny i L-karnityny oraz pomiary pH-metryczne roztworów. Wykazano możliwości tworzenia trwałych połączeń koordynacyjnych L-karnityny z Cu2+ i VO2+ oraz bardzo słabe oddziaływania z tauryną. Wprowadzenie słabej zasady (amoniaku) i słabego kwasu (kwasu octowego), zmieniających pH roztworów badanych, miało zasadniczy wpływ na stany równowagowe w roztworach kompleksów z tauryną i L-karnityną.
    Energy drinks sustain considerable level of popularity in Poland, especially among students doing intense mental work or intensively training sportsmen. These products can have both positive and negative influence, hence the need to conduct research on their optimal composition and effects on the body. In this paper the complexation abilities of selected components of energy drinks, taurine and L-carnitine with bioactive metal ions, copper(II) and oxovanadium(IV) have been tested. Spectrophotometric measurements were made in aqueous solutions containing varying amounts of metals and taurine or L-carnitine, without any buffer solutions, and without stabilization of ionic strength in the visible range of electromagnetic radiation as well as the solutions pH-metric measurements. The ability to create persistent coordination bonds of L-carnitine with Cu2+ and VO2+ has been shown as well as a very weak interactions with taurine. Addition of components altering pH of the solutions had a major effect on the equilibrium states in the solution of ammonia and of acetic acid complexes with taurine and L-carnitine.
    Źródło:
    Chemistry, Environment, Biotechnology; 2017, 20; 43-50
    2083-7097
    Pojawia się w:
    Chemistry, Environment, Biotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Use of synthetic zeolite materials from fly ash to remove copper(II) ions from aqueous solutions
    Autorzy:
    Ulatowska, Justyna
    Stala, Łukasz
    Nowakowska, Alicja
    Polowczyk, Izabela
    Powiązania:
    https://bibliotekanauki.pl/articles/1450167.pdf
    Data publikacji:
    2020
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    fly ash
    copper oxide (II)
    Cu(II)
    modification of fly ashes
    zeolite materials
    adsorption
    Opis:
    Water quality and waste management are two chief problems that the modern world is struggling with. Intensified development of the industry not only leads to the production of large amounts of solid waste that must be stored in landfills but can also result in contaminant emissions into the environment. Enormous quantities of ash produced from coal combustion have been a long-term problem of the industry. Literature studies show that fly ash can be used as a material to produce cheap and efficient zeolite-type adsorbents due to abundance of alumina-silicates in their composition. Fly ashes which were processed into zeolites as a result of alkaline hydrothermal treatment were obtained from two power plants in Poland (in Turów and Zgierz). The obtained zeolite materials and raw fly ash samples were characterised in terms of specific surface area, particle size distribution and density. The structure was also investigated using Fourier transform infrared spectroscopy (FTIR) in the mid- infrared wavenumber range. Two raw fly ashes and two zeolite materials were examined for their ability to remove Cu(II) ions from aqueous solutions. The results showed that the amount of adsorbed copper ions by alkaline-modified fly ash was higher than for unmodified fly ash. The ion removal efficiency is high and exceeds 95%.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2020, 56, 6; 114-124
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Selective removal of Cu(II), Co(II), Zn(II), and Ni(II) with ionizable dibenzo-16-crown-5 and dibenzo-19-crown-6 lariat ethers as ion carriers in polymer inclusion membrane transport
    Autorzy:
    Kozłowski, C. A.
    Walkowiak, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/346931.pdf
    Data publikacji:
    2007
    Wydawca:
    Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
    Tematy:
    polymer inclusion membrane
    competitive transport
    copper(II)
    cobalt(II)
    zinc(II)
    nickel(II)
    enthalpy of formation
    Derivatives of dibenzo-16-crown-5 and dibenzo-19-crown-6
    Opis:
    A selective removal of transition metal cations, i.e. Cu(II), Co(II), Zn(II), and Ni(II), with ionizable dibenzo-16-crown-5 and dibenzo-19-crown-6 lariat ethers as ionic carriers in transport across polymer inclusion membrane has been presented. The competitive transport from aqueous nitrate solutions containing metal ions at concentrations of 0.0010 M at pH 4.0 and 7.0 through the cellulose triacetate membrane with 0.5 M lariat ether 1 and 2 (based on a plasticizer) as the ion carrier and o-nitrophenyl pentyl ether (ONPPE) as the plasticizer into 0.5 M hydrochloric solution was performed. For pH = 4.0 and 7.0 of source aqueous phases the selectivity orders were as follows: Cu(II) > Co(II) > Zn(II) > Ni(II), and Cu(II) > Zn(II), Ni(II), Co(II), respectively. The semi-empirical equation was used for calculations of enthalpy formation for complexes of lariat ethers studied with transition metal cations. The two possibilities of metal cation-lariat ether coordination were assumed, i.e. via the crown ether cavity or ionizable carboxylic group. We found that for the both lariat ethers studied at pH 4.0 of source phase the transport rate linearly decreases with the enthalpy of formation increase. This correlation confirms that the observed behavior is connected with the stability of complexes formed by interaction of the lariat ether ring and the transition metal cations studied.
    Źródło:
    Ars Separatoria Acta; 2007, 5; 19-26
    1731-6340
    Pojawia się w:
    Ars Separatoria Acta
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Adsorpcja fenolu i jonów miedzi(II) na sferycznym węglu aktywnym utlenianym nadtlenodisiarczanem(VI) diamonu
    Adsorption of phenol and copper(ii) ions on spherical activated carbon oxidized with ammonium persulfate
    Autorzy:
    Dąbek, L.
    Kuśmierek, K.
    Świątkowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/237456.pdf
    Data publikacji:
    2018
    Wydawca:
    Polskie Zrzeszenie Inżynierów i Techników Sanitarnych
    Tematy:
    water treatment
    adsorption
    phenol
    copper(II)
    spherical activated carbons
    oxidized activated carbon
    ammonium persulfate
    oczyszczanie wody
    adsorpcja fenolu
    miedź(II)
    sferyczny węgiel aktywny
    utleniony węgiel aktywny
    nadtlenodisiarczan diamonu
    Opis:
    Zbadano adsorpcję fenolu i jonów miedzi(II) z modelowych roztworów wodnych na sferycznym węglu aktywnym utlenianym nadtlenodisiarczanem(VI) diamonu w różnych warunkach. Do oceny stopnia modyfikacji węgla wykorzystano analizę elementarną oraz izotermy adsorpcji pary wodnej i benzenu. Wykazano, że adsorpcję fenolu i jonów Cu(II) z roztworów wodnych można dobrze opisać modelami izoterm Freundlicha i Langmuira. Stwierdzono, że adsorpcja fenolu zmniejszała się wraz ze wzrostem stopnia utlenienia węgla i spadkiem jego powierzchni właściwej. Adsorpcja jonów Cu(II) zwiększała się wraz ze wzrostem stopnia utlenienia powierzchni węgla aktywnego, wykazując dużą rolę kwasowych grup tlenowych w adsorpcji jonów metalu na drodze wymiany jonowej. Wykazano również, że nadtlenodisiarczan(VI) diamonu okazał się bardzo skutecznym utleniaczem, gdyż nawet utlenianie węgla w najbardziej łagodnych warunkach (stężenie 0,1 mol/dm3, czas 30 min) dało znaczące zwiększenie ilości związanego tlenu (ok. 3,4-krotne) oraz znaczące zwiększenie ilości adsorbowanych jonów miedzi(II), przy stosunkowo niedużym zmniejszeniu ilości adsorbowanego fenolu.
    Adsorption of phenol and copper(II) ions from model aqueous solutions on spherical activated carbon oxidized with ammonium persulfate under various conditions was investigated. Elemental analysis and adsorption isotherms of water and benzene vapors were employed to assess the extent of modifications of the activated carbon surface. It was demonstrated that adsorption of phenol and Cu(II) ions from aqueous solutions could be well described by the Freundlich and Langmuir isotherm models. Adsorption of phenol decreased with the increasing degree of carbon oxidation as well as its decreasing specific surface area. Adsorption of the Cu(II) ions increased with the increasing degree of carbon surface oxidation indicating an important role of acidic groups in adsorption of metal ions by ion-exchange mechanism. Furthermore, ammonium persulfate was demonstrated to be an efficient oxidizing agent as carbon oxidation under even the mildest conditions (0.1 mol/dm3, 30 min) led to a significant increase in the oxygen bound (about 3-4 times) as well as the Cu(II) ions adsorbed. The amount of the adsorbed phenol decreased only slightly.
    Źródło:
    Ochrona Środowiska; 2018, 40, 4; 3-8
    1230-6169
    Pojawia się w:
    Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A new application of 2–benzoylpyridine – efficient removal of silver ions from acidic aqueous solutions via adsorption process on polymeric material and classic solvent extraction
    Autorzy:
    Kaczorowska, Małgorzata A.
    Bożejewicz, Daria
    Witt, Katarzyna
    Urbaniak, Włodzimierz
    Powiązania:
    https://bibliotekanauki.pl/articles/2202879.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    2–benzoylpyridine
    adsorptive polymer materials
    liquid–liquid extraction
    silver(I) and copper(II) ions
    mass spectrometry
    2-benzoilopirydyna
    adsorpcyjne materiały polimerowe
    ekstrakcja ciecz-ciecz
    jony srebra(I) i miedzi(II).
    spekrtometria masy
    Opis:
    In this article, we present the results of the first application of 2–benzoylpyridine (2–BP) as a carrier in adsorptive polymeric materials dedicated for the removal of Ag(I) and Cu(II) ions from model acidic solutions. In the first stage of the research, the classical solvent extraction, in which 2–BP was used as an extractant, allowed to determine the proper conditions for conducting adsorptive processes. The stability constants of 2–BP complexes with analyzed metal ions were determined using the spectrophotometric method. The electrospray ionization (ESI) high-resolution mass spectrometry (HRMS) method was applied for the confirmation of the ability of 2–BP molecules to form complexes with Cu2 ̧ metal ions in a solution and to determine the elemental composition of generated complexes (to identify the ratio of the number of metal ions to the number of molecules of 2–BP). The obtained results indicate that both the adsorptive processes and solvent extraction strongly depend on the properties of metal ions and that the use of 2–BP as a carrier/extractant allows for efficient removal of silver(I) ions and much less effective removal of copper(II) ions. The utilization of adsorptive polymeric materials is in line with the contemporary research trends that focus on eco-friendly and cost-effective methods.
    Źródło:
    Chemical and Process Engineering; 2022, 43, 3; 369--382
    0208-6425
    2300-1925
    Pojawia się w:
    Chemical and Process Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis of inorganic oxide composites with the use of postgalvanic waste solutions of copper(II) sulfate
    Autorzy:
    Modrzejewska-Sikorska, A.
    Ciesielczyk, F.
    Jesionowski, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/779557.pdf
    Data publikacji:
    2010
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    powierzchnia
    tlenek złożonych CuO.SiO2
    rozkład wielkości cząsteczek
    powierzchnia właściwa
    właściwości kalorymetryczne
    opady
    oxide composite CuO.SiO2
    waste solution of copper(II) sulfate
    precipitation
    particle size distribution
    surface area
    colorimetric characteristics
    Opis:
    The study was undertaken to obtain an oxide composite (inorganic colourful pigment) in the method based on the use of postgalvanic waste solution of copper(II) sulfate. The conditions of the process of precipitation of synthetic CuOźSiO 2 were optimised by checking the effect of the concentration and the volume ratio of the reagents and the temperature on the physico-chemical parameters of the final product. The oxide composite obtained in the optimum conditions was characterised by high refinement of particles and large specific surface area BET of 326 m2/g.
    Źródło:
    Polish Journal of Chemical Technology; 2010, 12, 2; 46-51
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Kinetics and isotherm modelling of Zn(II) ions adsorption onto mine soils
    Autorzy:
    Jalayeri, H.
    Salarirad, M. M.
    Ziaii, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/110575.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    copper mine soil
    Zn(II)
    adsorption kinetic
    adsorption isotherms
    Opis:
    The soils consist of various components that can play a significant role in control of heavy metals in the environment. Therefore, understanding of adsorption properties of soil is essential in solving pollution problems around mine sites. The goal of this paper is to study Zn(II) ions adsorption onto copper mine soil. Soils were examined via X-ray diffraction and scanning electron microscopy. The influence of various parameters such as effect of pH, adsorbent dose, and initial concentration of Zn(II) ions on adsorption was evaluated by batch method. The adsorption isotherms of Zn(II) ions such as Langmuir, Freundlich, and Temkin were studied. The Langmuir isotherm indicated an excellent fit for the experimental data in comparison with other isotherms that shown monolayer adsorption onto a homogenous surface. A number of kinetic models were tested to fit the kinetic data. The results show that soils can be more effective in decreasing heavy metals contamination specially Zn(II) ions from solution phase.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2016, 52, 2; 767-779
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Photosynthetic activity of Daucus carota L. subsp. sativus (Hoffm.) Schübl. & G. Martens and Triticum aestivum L. in the presence of copper and vanadium ions
    Autorzy:
    Konieczna, Iwona
    Rut, Grzegorz
    Kliszcz, Angelika
    Powiązania:
    https://bibliotekanauki.pl/articles/2176833.pdf
    Data publikacji:
    2018-12-31
    Wydawca:
    Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
    Tematy:
    photosynthesis
    carrot
    heavy metals
    copper
    wheat
    vanadium
    fotosynteza
    marchew
    pszenica
    metale ciężkie
    siarczan miedzi (II)
    metawanadan amonu
    Opis:
    The aim of this study was to investigate the influence of copper and vanadium ions on photosynthetic activity of carrot (Daucus carota L. subsp. sativus (Hoffm.) Schübl. & G. Martens) and winter wheat (Triticum aestivum L.). Measurements of the total chlorophyll content were performed - the SPAD chlorometer and the basic chlorophyll a fluorescence parameters were determined using the FMS-1 fluorometer - Hansatech. The studies used aqueous solutions of copper salt (CuSO4) and vanadium (H4NO3V), with molar concentrations: 0.6 mM, and 3 mM. The control group consisted of plants watered with distilled water. Both in carrots and in wheat, together with an increase in the concentration of heavy metal ions, a decrease in the content of chlorophyll was observed and significant changes in the activity of the photosystem were demonstrated II. Measurements of chlorophyll fluorescence kinetics and only in D. carota subsp. sativus showed a statistically significant effect of 3 mM solutions of copper and vanadium ions on photosynthetic activity. In T. aestivum none of the heavy metal ions induced significant changes in the values of chlorophyll a fluorescence.
    Celem niniejszej pracy było zbadanie wpływu jonów miedzi i wanadu na aktywność fotosyntetyczną marchwi uprawnej (Daucus carota L. subsp. sativus (Hoffm.) Schübl. & G. Martens) i pszenicy ozimej (Triticum aestivum L.). Przeprowadzono pomiary całkowitej zawartości chlorofilu – chlorofilomierzem SPAD oraz wyznaczono podstawowe parametry fluorescencji chlorofilu a przy użyciu fluorymetru FMS-1 – Hansatech. W badaniach wykorzystano wodne roztwory soli miedzi (CuSO4) i wanadu (H4NO3V), o stężeniach molowych 0,6 mM, i 3 mM. Grupę kontrolną stanowiły rośliny podlewane wodą destylowaną. Zarówno u marchwi, jak i u pszenicy, wraz ze wzrostem koncentracji jonów metali ciężkich, zaobserwowano zmniejszenie zawartości chlorofilu oraz wykazano istotne zmiany w aktywności fotosystemu II. Pomiary kinetyki fluorescencji chlorofilu a jedynie u roślin D. carota wykazały istotny statystycznie wpływ 3 mM roztworów jonów miedzi i wanadu na aktywność fotosyntetyczną badanych roślin. U T. aestivum L. żaden z jonów metali ciężkich nie wywoływał znaczących zmian w wartościach parametrów fluorescencji chlorofilu a.
    Źródło:
    Annales Universitatis Paedagogicae Cracoviensis Studia Naturae; 2018, 3; 70-79
    2543-8832
    2545-0999
    Pojawia się w:
    Annales Universitatis Paedagogicae Cracoviensis Studia Naturae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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