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    Wyświetlanie 1-7 z 7
    Tytuł:
    Encapsulated di-2-ethylhexylphosphoric acid: synthesis, dispersity and extraction properties
    Autorzy:
    Feklistov, D.
    Laguntsov, N.
    Penkina, Y.
    Kim, V.
    Powiązania:
    https://bibliotekanauki.pl/articles/347062.pdf
    Data publikacji:
    2004
    Wydawca:
    Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
    Tematy:
    encapsulation
    iron extraction
    polymer-surfactant complex
    Opis:
    Encapsulation of di-2-ethylhexylphosphoric acid was carried out by ionic complex of gelatine with cetyltrimonium bromide. Dispersity of obtained microcapsules at various extractant and oil phase contents was determined by optical microscopy and dynamic light scattering measurements. It was found that kinetic parameters and efficiency of iron removal from aqueous medium by encapsulated extractant is more attractive in comparison with the results of liquid or membrane extraction.
    Źródło:
    Ars Separatoria Acta; 2004, 3; 40-50
    1731-6340
    Pojawia się w:
    Ars Separatoria Acta
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Equilibrium and rate of iron(III) extraction from chloride solutions by individual hydrophobic extractants and their mixtures
    Autorzy:
    Staszak, K.
    Cierpiszewski, R.
    Prochaska, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/779284.pdf
    Data publikacji:
    2011
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    ekstrakcja
    żelazo(III)
    Alamine 336
    TOPO
    β-diketon
    extraction
    iron(III)
    β-diketone
    Opis:
    The main goal of this work was to study and compare the rate of iron(III) extraction from chloride solutions by commercial extractants: Alamine 336, TOPO and LIX 54 and their mixtures. Using the interfacial tension data, obtained for mixed systems, the values of surface mole fraction and molecular interaction parameter of extractants were estimated. Determination of the extraction rates was performed by using the Lewis-type stirred transfer cell. It was found that the extraction efficiency of extractants are changed in the following order: Alamine 336>TOPO>β-diketone. The addition of a chelating extractant to the system decreases the extraction efficiency, for example the addition of β-diketone to TOPO decreases the extraction efficiency by about 50%.
    Źródło:
    Polish Journal of Chemical Technology; 2011, 13, 1; 1-5
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of deep-water concretions by a spiral method
    Autorzy:
    Sukach, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/411197.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Oddział w Lublinie PAN
    Tematy:
    floating complex
    iron-manganese minerals
    spiral method of extraction
    trajectory of motion
    hose-cable
    Opis:
    These features occurrence and distribution of deep-sea nodules. A development of the bottom of fossil spiral manner. Scheme is shown floating and complex trajectory carriage bottom of the unit. The basic technological calculation unit that moves around the base module and given recommendations on its use.
    Źródło:
    ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes; 2016, 5, 4; 49-54
    2084-5715
    Pojawia się w:
    ECONTECHMOD : An International Quarterly Journal on Economics of Technology and Modelling Processes
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of various organic fertilisers on the heavy metal fractions in the soil. Part 3. Zinc, manganese and iron
    Autorzy:
    Filipek-Mazur, B
    Gondek, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1449514.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    iron
    manganese
    chemical extraction
    soil
    organic material
    zinc
    soil property
    degraded ecosystem
    anthropogenic ecosystem
    organic fertilizer
    heavy metal
    Opis:
    The paper presents distribution of zinc, manganese and iron in fractions of soil treated with tannery sludge and compost of tannery sludge and peat, and, for the sake of comparison, the soil from a plot treated with farmyard manure (FYM), and mineral fertilisers. Total soil contents of zinc ranged from 38.0 to 47.3 mg kg-1 of soil. The share of mobile zinc forms ranged between 6.05-7.93%. Percentage of the exchangeable form was between 5.8-7.5% of the total Zn contents, while the share of forms bound with organic matter ranged between 10.7 and 12.7%. A considerable part of zinc was bound with manganese and iron oxides. Between 30.14- 43.72% of Zn were found in the residual form. Organic and mineral treatment influenced the share of easily soluble manganese compounds. It ranged between 15.6-19.7%. The least of manganese (1.0-2.0%) occurred in the compounds with crystalline iron oxides. The exchangeable form constituted between 3.4-4.2%, organic fraction accumulated slightly more. Manganese oxides retained the most of the element. Trace amounts of iron were revealed in the first three fractions. The biggest part of this metal was found in sparingly soluble compounds, mainly oxides (over 40%) and on residual fraction (over 30%).
    Źródło:
    Acta Agrophysica; 2001, 51; 215-220
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Microelement contents in arable soils of the Upper Silesia
    Autorzy:
    Jasiewicz, C
    Sendor, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/1450107.pdf
    Data publikacji:
    2001
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    manganese
    iron
    arable soil
    Upper Silesian region
    extraction
    microelement
    soil
    content
    soil property
    zinc
    copper
    degraded ecosystem
    anthropogenic ecosystem
    agricultural chemistry
    Opis:
    In the present paper arable soils of the Upper Silesia were evaluated as to copper, zinc, manganese and iron contents, determined in the same extract, i.e. 1 M dm-3 HCl. The studies comprised 20 points in the vicinity of Sosnowiec and 20 points from near Zawiercie. Soil abundance in the available forms of microelements was assessed on the basis of the limiting numbers suggested by the Institute of Soil Science and Plant Cultivation. Soils of Zawiercie and Sosnowiec belonged to those with high contents of zinc in all the cases; in the majority of objects these were the soils with medium contents of copper and manganese. In half of the cases, the soils were classified as possessing low iron content, and in the remaining half as having medium iron content.
    Źródło:
    Acta Agrophysica; 2001, 51; 231-235
    1234-4125
    Pojawia się w:
    Acta Agrophysica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Quaternary phosphonium salts as effective extractants of zinc(II) and iron(III) ions from acidic pickling solutions
    Autorzy:
    Marszałkowska, B.
    Regel-Rosocka, M.
    Nowak, Ł.
    Wiśniewski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/778035.pdf
    Data publikacji:
    2010
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    ekstraktory
    cynk(II)
    żelazo(III)
    czwartorzędowe sole fosfoniowe
    kwas chlorowodorowy
    solvent extraction
    zinc(II)
    iron(III)
    quaternary phosphonium salts
    hydrochloric acid
    Opis:
    Extraction of zinc(II) and iron(III) from hydrochloric acid solutions using quaternary phosphonium salts, CyphosŽ IL 101, CyphosŽ IL 104, CyphosŽ IL109 and CyphosŽ IL 111 in mixtures with toluene, was studied. Trihexyl(tetradecyl)phosphonium chloride (CyphosŽ IL 101) and trihexyl(tetradecyl)phosphonium bis(2,4,4-trimethylpentyl)phosphinate (CyphosŽ IL 104) showed the best zinc(II) and iron(III) extraction abilities. After three stages of zinc(II) extraction with CyphosŽ IL 101 and CyphosŽ IL 104 the efficiencies were 100 and 93.6%, respectively. Total iron(III) transport to the organic phase was achieved after two separation stages and amounted to 82.1 and 100% for CyphosŽ IL 101 and CyphosŽ IL 104, respectively. Zinc(II) and iron(III) could be effectively stripped from the loaded organic phases with 0.5 mol dm-3 sulfuric acid. The more hydrophobic the character of the anion type of phosphonium salts, the lower the efficiency of extraction.
    Źródło:
    Polish Journal of Chemical Technology; 2010, 12, 4; 1-5
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Zawartosc Ca, Mg, Fe i Cu w wybranych gatunkach ziol i ich naparach
    The content of Ca, Mg, Fe and Cu in selected species of herbs and herb infusions
    Autorzy:
    Raczuk, J
    Biardzka, E.
    Daruk, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/877120.pdf
    Data publikacji:
    2008
    Wydawca:
    Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
    Tematy:
    ziola
    napary ziolowe
    sucha masa
    wapn
    magnez
    zelazo
    miedz
    zawartosc zelaza
    zawartosc miedzi
    zawartosc wapnia
    zawartosc magnezu
    ekstrakcja
    herb
    herbal infusion
    dry mass
    calcium
    magnesium
    iron
    copper
    iron content
    copper content
    calcium content
    magnesium content
    extraction
    Opis:
    W suchej masie i naparach 6 gatunków ziół (rumianek pospolity, lipa drobnolistna, skrzyp polny, melisa lekarska, mięta pieprzowa, dziurawiec zwyczajny) oznaczono metodą absorpcyjnej spektrometrii atomowej (ASA) Ca, Mg, Fe, Cu. Stwierdzono, że badane pierwiastki w różnym stopniu ulegają ekstrakcji do naparów. Wysoki stopień ekstrakcji do naparu wykazywał Ca i Mg, a niski Cu i Fe.
    The aim of the study was the recognition of the contents and distributions of calcium, magnesium, iron and copper in 6 herb species (matricaria chamomila, tilia cordata, equisetum arvense, melissa officinalis, mentha piperita, hypericum perforatum) and in the herb infusions. The samples were digested using a microwave oven, and the elements concentration was determined by AAS method. The following levels of Ca, Mg, Mg and Cu in the herbs were determined: 6872-19802 mg/kg Ca, 4630-8530 mg/kg Mg, 149,9-415,6 mg/kg Fe and 15,15-24,64 mg/kg Cu. The values of extractions in the infusions of herb were as follows: 16,1-73,8% Ca, 14,4-37,3% Mg, 5,1-9,7% Fe, 13,1-21,8% Cu. This indicates, that a very small part of the iron can be potentially treated as a bioavailable fraction for persons, using plant drugs as infusions. One glass of infusion (250 cm3) contain elements in quantities corresponding to: 0,78-2,61% average daily dietary intake (ADDIs) of Ca, 0,76-1,36% ADDIs of Mg, 026-0,38% ADDIs of Cu and only 0,15-0,33% ADDIs of Fe.
    Źródło:
    Roczniki Państwowego Zakładu Higieny; 2008, 59, 1; 33-40
    0035-7715
    Pojawia się w:
    Roczniki Państwowego Zakładu Higieny
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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