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    Wyświetlanie 1-6 z 6
    Tytuł:
    The distribution of 137Cs in maize (Zea mays L.) and two millet species (Panicum miliaceum L. and Panicum maximum Jacq.) cultivated on the caesium-contaminated soil
    Autorzy:
    Bystrzejewska-Piotrowska, G.
    Nowacka, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/147285.pdf
    Data publikacji:
    2004
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    bioremediation
    caesium hyperaccumulation
    phytoextraction
    Opis:
    The plants of three species (Zea mays L., Panicum miliaceum L. and Panicum maximum Jacq.) were grown on the soil contaminated with 0.3 mM CsCl solution traced with 137Cs, in the greenhouse. For all the species, the fresh-to-dry weight ratio was equal in the caesium-treated plants and in the control group after 3 weeks of culture. The shoot-to-root fresh weight and dry weight ratios were decreased in maize, unchanged in Panicum miliaceum and increased in Panicum maximum, comparing to the control without caesium treatment. The shoot/soil and also root/soil transfer factors (TF) for 137Cs (measured by means of NaI gamma spectrometer) were always the highest in maize, then lower in Panicum miliaceum and the lowest in Panicum maximum. All the plants seem to be hyperaccumulators of caesium. The root/soil TF was especially high in maize, i.e. 55 (kBq kg 1 biomass)/(kBq kg 1 soil). The shoot/root concentration factor (CF) for 137Cs was the lowest in maize, higher in Panicum miliaceum and the highest in Panicum maximum. The hyperaccumulation of 137Cs in the whole plant was the highest in maize, lower in Panicum miliaceum and the lowest in Panicum maximum. The proved ability of the investigated plants for phytoextraction of the soil caesium points to the possibility to utilise these plants in the soil bioremediation. From this point of view, Panicum maximum seems to be the most useful plant because it accumulates caesium mainly in the shoot, and maize would be the least useful species since it has the highest accumulation in the root.
    Źródło:
    Nukleonika; 2004, 49,suppl.1; 13-16
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preliminary study of platinum accumulation in the fruitbodies of a model fungal species: king oyster mushroom (Pleurotus eryngii)
    Autorzy:
    Urban, P.
    Bazała, M.
    Asztemborska, M.
    Manjón, J.
    Kowalska, J.
    Bystrzejewska-Piotrowska, G.
    Pianka, D.
    Stęborowski, R.
    Kuthan, R. T.
    Powiązania:
    https://bibliotekanauki.pl/articles/147784.pdf
    Data publikacji:
    2005
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    bioaccumulation
    bioremediation
    fungi
    heavy metals
    mushrooms
    mycoextraction
    platinum
    Opis:
    A model species of saprophytic fungus, king oyster mushroom (Pleurotus eryngii), was cultivated on barley substrate supplied with [Pt(NH3)4](NO3)2, under well defined conditions. The samples of the collected fruiting bodies were digested and analyzed for total platinum content by means of ICP-MS. The results proved that platinum is not accumulated in the fruitbodies of Pleurotus eryngii for a wide range of Pt concentrations in the culture substrate (100 1000 ppb Pt in 50 ml of water solution added to ca. 450 g of hydrated barley seeds per container). Observable levels of Pt were only found in the fruitbodies obtained from the medium contaminated with 10000 ppb (10 ppm) platinum solution. This demonstrates significant difference in the effectiveness of platinum extraction in fungi and plants, which are capable to accumulate platinum even when supplied at lower concentration (<500 ppb). It also shows different physiological pathways of platinum and other elements which are easily accumulated in the fruitbodies of the same species.
    Źródło:
    Nukleonika; 2005, 50,suppl.1; 63-67
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Platinum bioaccumulation by mustard plants (Sinapis alba L.)
    Autorzy:
    Hawieńczyk, M.
    Bystrzejewska-Piotrowska, G.
    Kowalska, J.
    Asztemborska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/147788.pdf
    Data publikacji:
    2005
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    bioaccumulation of Pt
    biomonitoring
    bioremediation
    mustard plants
    platinum
    Opis:
    The ability of hydroponically cultivated Indian mustard plants (Sinapis alba L.) to accumulate platinum was investigated. The Pt-bioaccumulation in leaves, stem and shoots of plants growing for 2 and 4 weeks at Pt-concentration of 50 and 500 ěg/L was compared. The relation between dry and fresh weight was also estimated. Adsorptive stripping voltammetry (AdSV) and mass spectrometry with inductively coupled plasma (ICP-MS) were applied for determination of Pt. Increasing Pt-concentration from 50 to 500 ěg/L in the medium causes: (1) reduction of the root tissue hydration level at unchanged modification in aboveground parts of the plants and (2) decrease of the Pt transfer factor (TF) for roots and increase for leaves and stem. Duration of the culture influenced on Pt-accumulation in roots and in aboveground organs of mustard plants. Transfer factor for Pt between 560 and 1600 makes Indian mustard plants one at Pt-hyperaccumulators. Distribution of Pt-bioaccumulation in the plant organs may be useful for biomonitoring of platinum in the environment.
    Źródło:
    Nukleonika; 2005, 50,suppl.1; 59-61
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Uptake and distribution of caesium and its influence on the physiological processes in croton plants (Codiaeum variegatum)
    Autorzy:
    Bystrzejewska-Piotrowska, G.
    Jeruzalski, M.
    Urban, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/147293.pdf
    Data publikacji:
    2004
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    bioremediation
    o caesium uptake
    caesium distribution
    croton plants
    phytoextraction
    Opis:
    Croton (Codiaeum variegatum) belongs to the salinity-resistant plants. This paper presents some experimental data in order to assess usefulness of croton plants for phytoremediation of caesium-contaminated soils. The plants were grown in a greenhouse, in the soil contaminated with 0.03, 0.3, 1, 3, 5 and 10 mM CsCl solution enriched with 137Cs as a radiotracer. The croton plant demonstrated high resistance to increasing CsCl salinity of the soil. This conclusion was based on the observation that the above-ground organ fresh-to-dry weight ratio was constant. However, this value was lower for the roots. The young-to-old leaf dry weight ratio was decreasing while the concentration of CsCl in the soil was increasing. The increase in soil CsCl concentration was associated with the decrease in photosynthesis as well as a rise in the intra-tissue concentration of CO2 and increase of the CO2 stomatal conductance. Photosynthetic water utilization efficiency was constant in the range of 0.03-1 mM CsCl and it was only lower with higher CsCl concentration. This situation gives an evidence that croton plant is highly resistant to the soil CsCl salinity. The 137Cs radiotracer experiment showed the maximal accumulation of caesium with 0.3 mM CsCl, a lower one with 0.03 mM, and poor accumulation with 3 and 5 mM CsCl solutions. The transfer factor value for 137Cs (plant-to-soil) was about 10, which proved a high ability of croton plants to accumulate caesium to a high extent. However, the highest accumulation took place in the roots. The intensive phytoextraction of caesium from the soil may indicate its potential capacity for bioremediation. The reported observation warrants further studies.
    Źródło:
    Nukleonika; 2004, 49,suppl.1; 35-38
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Cationic interactions in caesium uptake by king oyster mushroom (Pleurotus eryngii )
    Autorzy:
    Bystrzejewska-Piotrowska, G.
    Manjón, J.
    Pianka, D.
    Bazała, M.
    Urban, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/147730.pdf
    Data publikacji:
    2005
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    bioaccumulation
    bioremediation
    caesium
    fungi
    mushrooms
    mycoextraction
    Pleurotus eryngii
    radionuclides
    Opis:
    In order to explain influence of common cations (K+, Na+ and Ca2+) on uptake and transport of caesium in macromycetes, a culture of a model mushroom species, king oyster mushroom (Pleurotus eryngii) was set up. Fructification in a growing chamber with stabilised temperature (18°C) and humidity (80%) was preceded by mycelial colonization of the sterilized barley seed medium packed into autoclavable plastic containers. Aliquots of test solutions, containing 0.1 mM caesium chloride carrier traced with 137CsCl and the selected ions, were dosed into the interphase between the container wall and the spawn block. This allowed to study influence of the added ions on the uptake of caesium in a way unaffected by the used growing medium, e.g. soil, as it was in the previous studies. The experiments demonstrated that the major amount of radiocaesium was biologically bound and accumulated in the fruitbodies to a higher extent (56 69%) than in the mycelium. Addition of 10 mM Na+ decreased the transfer factor for caesium (cap/soil) while addition of Ca2+ caused an increase of this value. The effect of potassium addition depended on its concentration in the solution. Also the Cs/K ratio in caps was significantly influenced by addition of 10 and 100 mM Na+. However, the Cs/K ratio in stipes was affected by Ca2+. Discrimination factors, calculated from specific activities (137Cs/40K cap d.w.)/(137Cs/40K stipe d.w.), were also changed after addition of the studied cations. Since the activities of caesium measured in the fruitbodies of single fungal species strongly depend on the content of co-supplied ions, further proofs should be achieved before using mushrooms as bioindicators of the soil caesium contamination.
    Źródło:
    Nukleonika; 2005, 50,suppl.1; 9-13
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Treatment of acid drainage in a uranium deposit by means of a natural wetland
    Autorzy:
    Groudeva, V.
    Groudev, S.
    Stoyanova, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/147283.pdf
    Data publikacji:
    2004
    Wydawca:
    Instytut Chemii i Techniki Jądrowej
    Tematy:
    acid mine drainage
    bioremediation
    natural wetland
    uranium
    water cleanup
    Opis:
    Abstract Acid drainage waters generated in the uranium deposit G-1, Western Bulgaria, were treated by means of a natural wetland located in the deposit. The waters had a pH in the range of about 2.4 3.9 and contained uranium and radium radionuclides, heavy metals (copper, zinc, cadmium, iron, manganese), arsenic and sulphates in concentrations usually much higher than the relevant permissible levels for waters intended for use in the agriculture and/or industry. The wetland was characterized by abundant and emergent vegetation and a diverse microflora. Typha latifolia, Typha angustifolia and Phragmites australis were the main plant species in the wetland but representatives of the genera Scirpus, Juncus, Eleocharis, Potamogeton, Carex and Poa as well as different algae were also present. The water flow through the wetland varied in the range at about 0.2 1.2 l/s reflecting water residence times in the wetland of about 10 50 hours. An efficient water cleanup took place in the wetland, even during the cold winter months at ambient temperatures close to 0°C. The removal of pollutants was due to different processes but the microbial dissimilatory sulphate reduction and the sorption of pollutants on organic matter (living and dead plant and microbial biomass) and clays present in the wetland played the main role.
    Źródło:
    Nukleonika; 2004, 49,suppl.1; 17-20
    0029-5922
    1508-5791
    Pojawia się w:
    Nukleonika
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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