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    Wyświetlanie 1-9 z 9
    Tytuł:
    Water Purification from Ions of Cadmium (II) Using a Bio-Plateau
    Autorzy:
    Lapan, Oksana
    Mikhyeyev, Oleksandr
    Madzhd, Svitlana
    Dmytrukha, Tetyana
    Cherniak, Larysa
    Petrusenko, Valentyna
    Powiązania:
    https://bibliotekanauki.pl/articles/123841.pdf
    Data publikacji:
    2019
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    phytoremediation
    bio-plateau
    terrestrial plant
    cadmium(II)
    Opis:
    The study was conducted with the purpose of experimentally developing the method of water purification from ions of cadmium (II) using a new design of a bio-plateau, which is based on the use of terrestrial plants. In order to construct the bio–plateau, the following chemically inert floating materials were used as the substrate: perlite, expanded clay, granular foam, vermiculite, cork, on top of which the seeds of higher terrestrial plants were placed. The experimental data showed that foam was the best of the tested substrates, and of plants – barley, oats, corn and rye. The constructed bio-plateau was placed into tanks with a solution of cadmium on the 9th day of incubation to study the cleaning efficiency of terrestrial plants on the aquatic environment. Determination of the residual concentration of cadmium was performed with the method of AAC at λ=228.8. As a result, it was found that rye showed the best sorption properties of the tested plants. The influence of additional aeration and pH of the medium on the degree of water purification was established. The highest treatment efficiency was observed in the variant of a bio-plateau with aeration and at a pH of 8-9. The study shows the possibility of using terrestrial plants for the phytoremediation of water bodies.
    Źródło:
    Journal of Ecological Engineering; 2019, 20, 11; 29-34
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Lead(II) removal from aqueous solutions by solvent extraction with tetracarboxylresorcin[4]arene
    Autorzy:
    Konczyk, J.
    Kozlowski, C.
    Walkowiak, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/110670.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    solvent extraction
    lead(II)
    zinc(II)
    cadmium(II)
    resorcinarene
    Opis:
    A novel tetracarboxylresorcin[4]arene was synthesized and its selective complexing ability towards Pb(II) ions was examined. The influence of several parameters such as pH of aqueous phase, agitation time, extractant and modifier concentrations on solvent extraction of Pb(II) ions from the aque-ous nitrate phase into chloroform organic phase was studied. The stoichiometry of the formed metal-ligand complexes was established by slope analysis. Pb(II) ions were quantitatively extracted in the form of 2:1 Pb(II)-resorcin[4]arene complex from aqueous solutions of pH 5.5 to the solution of ligand in chloroform. Competitive solvent extraction experiments in the presence of Zn(II) and Cd(II) ions were also carried out and high selectivity of the extractant towards Pb(II) over Zn(II) and Cd(II) was found. The selectivity order was: Pb(II) >> Cd(II) > Zn(II).
    Źródło:
    Physicochemical Problems of Mineral Processing; 2013, 49, 1; 213-222
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    N-(diethylthiophosphoryl)-aza[18]crown-6: synthesis and ability of solvent extraction toward lead(II), zinc(II) and cadmium(II) metal cations
    Autorzy:
    Kozlowska, J.
    Miroshnichenko, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/346955.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
    Tematy:
    crown ethers
    solvent extraction
    lead(II)
    zinc(II)
    cadmium(II)
    Opis:
    This work presents the synthesis of a strongly hydrophobic, functionalized monaza crown ether, i.e., lariat ether, namely N-(diethylthiophosphoryl)-aza[18]crown-6 and its application as ion extractant in solvent extraction systems. The synthesis of thiophosphorylated aza[18]crown-6 was performed with good yield. Separation systems have been successfully developed to extract Pb(II), Cd(II) and Zn(II) into organic phase, i.e., chloroform with the crown ethers: aza[18]crown-6 and N-(diethylthiophosphoryl)-aza[18] crown-6 as extractants. The selectivity order in both crown ethers was Pb(II) >> Cd(II) > Zn(II). The obtained results suggest that N-(diethylthiophosphoryl)-aza[18]crown-6 can be used for the selective removal of Pb(II) at lower pH values than aza[18]crown-6.
    Źródło:
    Ars Separatoria Acta; 2012-2013, 9/10; 7-14
    1731-6340
    Pojawia się w:
    Ars Separatoria Acta
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Extraction properties of tetraheptylresorcin[4]arenes in relation to Cr(III) ions
    Autorzy:
    Konczyk, J.
    Miroshnychenko, S.
    Kozlowski, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/109751.pdf
    Data publikacji:
    2016
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    solvent extraction
    resorcin[4]arenes
    chromium(III)
    cadmium(II)
    zinc ions
    Opis:
    Resorcin[4]arene-based ligand bearing four heptyl chains at the lower rim of the molecule was prepared and modified by four tetradietoxyphosphoryl groups in the upper rim. The compounds obtained were characterized by NMR spectroscopy and their extractability toward chromium(III) ions was studied. The influence of process parameters such as the pH of aqueous phase, agitation time and also extractant’s structure and concentration on efficiency of Cr(III) ions solvent extraction is presented. The highest yield of Cr(III) solvent extraction was obtained for two-hour agitation time of 5.010−4 M metal solution of pH 5.0 and 5.010−3 M chloroform solution of the tetradietoxyphosphorylated derivative of heptyl-resorcin[4]arene. Under optimal conditions, competitive solvent extraction of Cr(III), Zn(II), and Cd(II) ions was performed and separation factor values were established as 77.0 and 24.9 for Cr(III)/Cd(II) and Cr(III)/Zn(II) ions pairs, respectively. The stoichiometry of formed metal-ligand complexes 1:1 was found by classical slope analysis method.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2016, 52, 2; 835-844
    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:
    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:
    Separation Of Cadmium(II), Cobalt(II) And Nickel(II) By Transport Through Polymer Inclusion Membranes With Phosphonium Ionic Liquid As Ion Carrier
    Separacja jonów kadmu(II), kobaltu(II) i niklu(II) w procesie transportu przez polimerowe membrany inkluzyjne zawierające fosfoniową ciecz jonową w roli przenośnika
    Autorzy:
    Pospiech, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/352721.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cadmium(II)
    cobalt(II)
    nickel(II)
    Cyphos IL 101
    polymer inclusion membrane
    kadm(II)
    nikiel(II)
    kobalt(II)
    polimerowe membrany inkluzyjne
    Opis:
    This paper presents study on the facilitated transport of cadmium(II), cobalt(II) and nickel(II) ions from aqueous chloride solutions through polymer inclusion membranes (PIMs) with phosphonium ionic liquid. Cyphos IL 101 (trihexyl(tetradecyl) phosphonium chloride) was used as a selective carrier for synthesis of cellulose triacetate membranes containing o-nitrophenyl pentyl ether (ONPPE) as a plasticizer. Effect of different parameters such as hydrochloric acid concentration in the source phase as well as ion carrier concentration in the polymer membrane on metal ions transport has been investigated. Cd(II) was transported preferably from hydrochloric acid solutions containing Co(II) and Ni(II) through PIM containing 18.8 wt.% CTA and 26.0 wt.% Cyphos 101 and 55.1 wt.% ONPPE into 0.5 M HNO3 as the receiving phase. The obtained results suggest that there is a possibility of application of this membrane with Cyphos IL 101 as ion carrier for separation of Cd(II) over Co(II) and Ni(II) from hydrochloric acid solutions.
    Przeprowadzono badania transportu jonów Cd(II), Ni(II) i Co(II) z wodnych roztworów kwasu solnego przez polimerowe membrany inkluzyjne (PIMs) zawierające fosfoniową ciecz jonową – Cyphos IL 101 (chlorek triheksylo(tetradecylo) fosfoniowy) w roli selektywnego przenośnika jonowego. Rolę polimerowej matrycy w membranie pełnił trioctan celulozy (CTA). Jako plastyfikatora użyto eteru nitrofenylopentylowego (ONPPE). W wyniku badań określono wpływ różnych czynników, takich jak stężenie kwasu solnego w fazie zasilającej, jak również stężenie przenośnika w polimerowej membranie na selektywność i efektywność transportu badanych jonów metali. Jony kadmu(II) były selektywnie transportowane z roztworów kwasu solnego zawierającego jony niklu(II) i kobaltu(II) do 0,5 M roztworu kwasu azotowego(V). Uzyskane wyniki wskazują, że istnieje możliwość zastosowania procesów transportu przez polimerowe membrany inkluzyjne z cieczą jonową w roli selektywnego przenośnika do rozdzielania jonów Cd(II) od Ni(II) i Co(II) z roztworów kwasu solnego.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 4; 2933-2938
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modeling and analysis of batch extraction process for efficient removal of cadmium and pathogens from aqueous solution using modified plantain peel biochar
    Autorzy:
    Nworie, F. S.
    Oti, W. O.
    Nwali, U.
    Powiązania:
    https://bibliotekanauki.pl/articles/1193435.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Aspergillus
    Biochar
    Candida
    Escherichia coli
    Pseudomonas aeuroginosa
    Staphylococcus aureus
    cadmium (II)
    equilibrium studies
    mass transfer
    pathogens
    Opis:
    Consumption of water contaminated with pathogens and heavy metals is responsible for the demise of millions of people around the globe. To find a low cost, facile and benign route for developing a biosorbent capable of handling the challenges associated with unsafe drinking water, the study report the preparation, activation, adsorption and removal of cadmium and pathogenic organisms from water samples. Modified plantain peel biochar (MPPB) was characterized using Braunauer-Emmett-Teller (BET) surface area and X-Ray diffraction (XRD). Surface area and pore size of the MPPB determined from BET surface area plot are 8.79 cc/g and 16.69 m2/g respectively with XRD crystallite size of 14.56 nm. The maximum adsorption capacity was observed to be 366.300 mmolkg-1. Equilibrium isotherm indicated the coefficient of determination to increase from Jovanovich →Elovic→Temkin→Freundlich→Langmuir model. Surface interaction and mass transfer kinetics shows a mixture of intra-particle diffusion and mass transfer process. The adsorption kinetics and surface interaction models coefficient of determination increased from Bangham pore diffusion →mass transfer model→Liquid film diffusion→pseudo first order→Dunwald-Wagner→Elovic→Pseudo-second order→Weber and Moris model. The adsorption indicated a chemisorption process with rate limitimg step likely to involve electron pair donor-acceptor interactions, hydrogen bonding and dipole dipole interactions. Antimicrobial evaluation of MPPB showed that it is a potential antimicrobial agent against common micro-organisms.
    Źródło:
    World Scientific News; 2021, 157; 1-24
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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