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    Wyświetlanie 1-3 z 3
    Tytuł:
    137Cs content in mushrooms from localities in eastern Slovakia
    Autorzy:
    Cipáková, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/147289.pdf
    Data publikacji:
    2004
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    radiocaesium
    mushrooms
    soil contamination
    sequential extraction
    Opis:
    The amount of radiocaesium in chosen species of mushrooms from localities in eastern Slovakia was studied. From the obtained results it was found that Macrolepiota procera and Armillariella mellea are defined by low ability to accumulate caesium. Higher values of 137Cs were measured in Russula aeruginea and Xerocomus subtomentosus and achieved 869.6 and 322.9 Bg kg 1 dry weight, respectively. Soaking and washing can be used to decrease radioactivity in mushrooms. Using water and solution of table salt in studied species of mushrooms decreased the amount of radiocaesium by 33 88%.
    Źródło:
    Nukleonika; 2004, 49,suppl.1; 25-29
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Migration of radiocaesium in individual parts of the environment
    Autorzy:
    Čipáková, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/147738.pdf
    Data publikacji:
    2005
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    137Cs
    soil contamination
    sequential extraction
    mushrooms
    Opis:
    The aim of this study was to compare the amount of radiocaesium in chosen compartments of environment in two localities of Košice vicinity (Košice and Jasov). Prevailing part of radiocaesium is in the upper layer of soils and specific activity of 137Cs in the first layer for locality Jasov in 2001 achieved 21.49 Bq.kg 1. Transfer factor values estimated for mixed grasses and for individual years varied within the range of 0.22 to 0.56 at locality Košice and of 0.09 to 0.19 at locality Jasov. On the base of results from modified Tessier sequential extraction method we determined that more than 50% of this radionuclide is in the soil in not extractable fraction. From studied species of mushrooms in sample of Rozites caperata the specific activity achieved 1822.0 Bq.kg 1 d.w.
    Źródło:
    Nukleonika; 2005, 50,suppl.1; 19-23
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Plant uptake of radiocesium from contaminated soil
    Autorzy:
    Pipíška, M.
    Lesný, J.
    Hornik, M.
    Augustín, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/147279.pdf
    Data publikacji:
    2004
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    radiocesium
    soil contamination
    plant uptake
    sequential extraction
    case study
    Opis:
    Phytoextraction field experiments were conducted on soil contaminated with radiocesium to determine the capacity of autochthonous grasses and weeds to accumulate 137Cs. The aim of the study was to evaluate the potential of spontaneously growing vegetation as a tool for decontamination of non-agricultural contaminated land. As a test field, the closed monitored area of the radioactive wastewater treatment plant of the Nuclear Power Plant in Jaslovské Bohunice, Slovakia was used. Contamination was irregularly distributed from the level of background to spots with maximal activity up to 900 Bq/g soil. Sequential extraction analysis of soil samples showed the following extractability of radiocesium (as percent of the total): water < 0.01%; 1 M MgCl2 = 0.3-1.1%; 1 M CH3COONa = 0.3-0.9%; 0.04 M NH4Cl (in 25% CH3COOH) = 0.9-1.4%; and 30% H2O2 - 0.02 M HNO3 = 4.5-9.0%. Specific radioactivity of the most efficiently bioaccumulating plant species did not exceed 4.0 kBq kg 1 (dry weight biomass). These correspond to the soil-to-plant transfer factor (TF) values up to 44.4 × 10 4 (Bq kg 1 crop, d.w.)/(Bq kg 1 soil, d.w.). Aggregated transfer factor (Tag) of the average sample of the whole crop harvested from defined area was 0.5 × 10 5 (Bq kg 1 d.w. crop)/(Bq m 2 soil). It can be concluded that low mobility of radiocesium in analysed soil type, confirmed by sequential extraction analyses, is the main hindrance for practical application of autochthonous plants as a phytoremediation tool for aged contaminated area of non-cultivated sites. Plant cover can efficiently serve only as a soil surface-stabilising layer, mitigating the migration of radiocesium into the surrounding environment.
    Źródło:
    Nukleonika; 2004, 49,suppl.1; 9-11
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-3 z 3

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