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    Wyświetlanie 1-3 z 3
    Tytuł:
    Available and potentially available zinc in arable black earths (gleyic chernozems) under conventional soil management
    Autorzy:
    Dąbkowska-Naskręt, H.
    Jaworska, H.
    Bartkowiak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/207023.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    agricultural soils
    soil management
    zinc
    gleby rolnicze
    gospodarka gruntami
    cynk
    Opis:
    Based on a seven step sequential extraction procedure, available and potentially available fractions of zinc in agricultural soils classified to black earths (gleyic chernozems) being under conventional soil management were separated, it was found that zinc is present mostly in non available fractions and the content of labile zinc is scant. The total contents of Zn ranged from 22.7 to 221.0 mg/kg. The exchangeable Zn was low accounting for less than 7% of the total in most soils. Zinc availability is restricted due to fixation of metal to soil components: iron oxides and organic matter. Zinc was also found in significant amounts in residual fraction, which refers to metal tightly bound in crystal lattice of primary minerals. The study shows that in majority of analyzed soils, available zinc is below the deficit limit. It is necessary to recognize the scale of the problem due to possible application of Zn fertilizer.
    Źródło:
    Environment Protection Engineering; 2017, 43, 3; 181-188
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of the content of trace elements in the aerial and underground biomass of perennial grasses of the genus Miscanthus
    Autorzy:
    Stypczyńska, Z.
    Dziamski, A.
    Jaworska, H.
    Dąbkowska-Naskręt, H.
    Powiązania:
    https://bibliotekanauki.pl/articles/207911.pdf
    Data publikacji:
    2018
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    Miscanthus
    heavy metals
    biochemistry
    Miskant
    metale ciężkie
    biochemia
    Opis:
    The content of lead, zinc, copper, nickel and chromium in the aerial and underground parts of M. sinensis from eleven years old plantation and M. sacchariflorus and M. giganteus from nine years old plantations were analysed in order to recognize what organs of the plant play the most important function as a metal accumulator. It was found that in the aboveground parts, lead, zinc and copper were accumulated mostly in leaves and nickel and chromium in stems of the studied species. In underground plant parts, especially in roots, zinc, copper and nickel were most abundantly accumulated, while rhizomes accumulated higher amounts of lead and chromium. The content of lead, zinc and copper was definitely lower in those plant organs than their content in soil. The content of nickel and chromium, on the other hand, showed the opposite dependence. A similar capacity for uptaking trace elements from soil was observed for M. sacchariflorus and M. giganteus, while M. sinensis it was much lower, which is confirmed by the values of the bioaccumulation factors. The translocation factor for trace metals in the studied grass species indicated great translocation of lead and nickel from the roots to rhizomes, and that of zinc to aboveground parts.
    Źródło:
    Environment Protection Engineering; 2018, 44, 3; 141-151
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of physicochemical and biochemical factors of urban street dust
    Autorzy:
    Bartkowiak, A.
    Dąbkowska-Naskręt, H.
    Lemanowicz, J.
    Siwik-Ziomek, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/206993.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    miejskie pyły uliczne
    metale ciężkie
    odpady komunalne
    sprzątanie ulic
    urban street dusts
    heavy metals
    municipal waste
    street cleaning
    Opis:
    Studies concerned the composition of street cleansing residue (municipal waste with code 20 03 03) collected and accumulated on mound. The contents of macro- (C, P, S) and microelements (Zn, Cu, Pb, Ni, Cr, Mn, Fe) as well as enzymatic activity (dehydrogenase, catalase, alkaline and acid phosphatase, arylsulfatase) were determined in order to consider this material as a source of nutrients in agriculture. The study showed that the stored material consists mainly of mineral particles, poor in organic matter (mean content 2.905 g/kg) and fine fraction (particles of diameter less than 2 mu m did not exceed 2 wt. %), with alkaline pH. Elevated levels of heavy metals (Cu, Pb, Ni, Cr, Mn and Fe) indicate that street cleaning residue is contaminated with these metals. In spite of relatively high content of phosphorus (mean 52.08 mg/kg) analyzed material should not be used for soil amendment as a source of P for plants, because of the accumulation of heavy metals, and also high contents of S-SO42- (mean 56.38 mg/kg). Furthermore, low biological index fertility (BIF) calculated on the base of enzymatic activity of the collected waste, indicates that analyzed material has low ability to fulfil nourishing plant needs and might be a threat to the environment.
    Źródło:
    Environment Protection Engineering; 2017, 43, 3; 155-164
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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