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    Wyświetlanie 1-4 z 4
    Tytuł:
    Identification of transport parameters of chlorides in different soils on the basis of column studies
    Autorzy:
    Pietrzak, Damian
    Kania, Jarosław
    Kmiecik, Ewa
    Wątor, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/94612.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    pore-water velocity
    dispersion coefficient
    dispersivity constant
    CXTFIT
    STANMOD
    współczynnik dyspersji
    stała dyspersyjności
    Opis:
    Knowledge of transport patterns of chemicals in groundwater is essential for environmental assessment of their potential impact. In the present study, the mobility of a chloride tracer injected into three different soils was investigated, using column experiments. The column tests were performed under steady-state conditions to determine parameters of chloride migration through soils. Based on breakthrough curves, pore-water velocity, dispersion coefficient and dispersivity constant were calculated for each soil sample using CXTFIT/STANMOD software. Pore-water velocity was in the range of 0.31 cm/min for fine sand, to 0.35 cm/min for silty sand and to 0.40 cm/min for vari-grained sand. The highest values of dispersion coefficient and dispersivity constant were observed for silty sand (0.55 cm2/min and 1.55 cm, respectively), while the lowest value was found for fine sand (0.059 cm2/min and 0.19 cm, respectively). Column experiments for chlorides (conservative tracer) are a preliminary stage for further research which will be undertaken to investigate migration parameters of selected neonicotinoids (reactive tracers) through different soils.
    Źródło:
    Geologos; 2019, 25, 3; 225-229
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A probabilistic approach to assessment of the quality of drinking water
    Autorzy:
    Wątor, Katarzyna
    Kmiecik, Ewa
    Postawa, Adam
    Rusiniak, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/94629.pdf
    Data publikacji:
    2019
    Wydawca:
    Uniwersytet im. Adama Mickiewicza w Poznaniu
    Tematy:
    QA/QC
    water intended for human consumption
    heavy metals
    uncertainty
    decision rules
    woda przeznaczona do spożycia
    metale ciężkie
    niepewność
    reguły decyzyjne
    Opis:
    Knowledge of uncertainty in analytical results is of prime importance in assessments of compliance with requirements set out for the quality of water intended for human consumption. Assessments of drinking water quality can be per-formed using either a deterministic or a probabilistic method. In the former approach, every single result is referred directly to the parametric value, while in the probabilistic method uncertainty related to analytical results is taken into account during the decision-making process. In the present research, laboratory uncertainty and uncertainty deter-mined on the basis of results of analyses of duplicate samples collected in two Polish cities were compared and used in the probabilistic approach of water quality assessment. Using the probabilistic method, more results were considered to be “above the parametric value”. Most excesses were observed when the maximum allowable uncertainty as set out in the Regulation of the Minister of Health of 7 December 2017 was used, which is due to the highest values of these uncertainties. The lowest values above parametric values in the probabilistic approach were observed when measurement uncertainty was considered.
    Źródło:
    Geologos; 2019, 25, 3; 249-254
    1426-8981
    2080-6574
    Pojawia się w:
    Geologos
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    BPA – an endocrine disrupting compound in water used for drinking purposes, a snapshot from South Poland
    Autorzy:
    Kmiecik, Ewa
    Styszko, Katarzyna
    Wątor, Katarzyna
    Dwornik, Małgorzata
    Tomaszewska, Barbara
    Powiązania:
    https://bibliotekanauki.pl/articles/184178.pdf
    Data publikacji:
    2020
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    emerging contaminants
    endocrine disrupting compounds
    groundwater protection
    groundwater domestic wells
    bisphenol A
    Opis:
    Bisphenol A (BPA) is a chemical produced in large quantities for use primarily in the production of polycarbonate plastics and epoxy resins. As an endocrine disrupting compound, it has been included in the list of substances requiring special supervision as a very high-risk substance due to its toxic influence on reproduction. BPA with a reference value of 0.01 μg/L was included in the Drinking Water Directive revision (DWD 2018). This paper presents the results of preliminary studies aimed at identifying the occurrence of BPA in different types of water, i.a. groundwater captured with house wells or flowing wells in a selected location in southern Poland. These waters are commonly used as a source of water intended for human consumption and their quality is not regularly controlled. Additional tests were carried out for surface water, as well as water from springs used for drinking purposes. The authors also analysed tap water from various sources, i.e. surface and groundwater, as the final product of the drinking water production cycle. The results indicate the presence of BPA in water and the necessity of a detailed study on the risk of the BPA occurring in groundwater, especially in domestic wells.
    Źródło:
    Geology, Geophysics and Environment; 2020, 46, 1; 5-16
    2299-8004
    2353-0790
    Pojawia się w:
    Geology, Geophysics and Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Health risk assessment resulting from the presence of Legionella bacteria in domestic hot water in public buildings – the results of a pilot study
    Autorzy:
    Kmiecik, Ewa
    Wątor, Katarzyna
    Chochorek, Aneta
    Kołodziej, Mateusz
    Mika, Anna
    Krawiec, Arkadiusz
    Herzig, Janusz
    Powiązania:
    https://bibliotekanauki.pl/articles/1841764.pdf
    Data publikacji:
    2021
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    Legionella pneumophila
    tap water
    public building
    quantitative risk assessment
    microbial risk assessment
    risk matrix
    Opis:
    The aim of the study was to assess the risk posed by Legionella bacteria in a public building in Krakow. An old building with internal installation risers of different ages, as well as draw-off points of different types, was selected for testing. Samples were collected during two campaigns. In one sample of the first series of tests, no bacteria were found. During the second series of tests, no Legionella bacilli were found in just one sample and in one sample only 4 colony-forming units were detected. At the remaining draw-off points (water taps), the bacteria count detected were greater than the maximum threshold allowed by legal regulations (admissible threshold for public utility buildings – 100 cfu/100 mL). No morphological differences were observed with respect to the occurrence of specific serogroups. In 14 samples, Legionella pneumophila serogroups 2–14 were found, while the Legionella pneumophila serogroup 1 was only found in one sample. The risk assessment was also carried out based on a semi-quantitative risk matrix approach and as a quantitative microbial risk assessment. The risk matrix approach was successfully implemented for the recognition of the potential risk associated with the Legionella occurrence in a water system. The calculated annual cumulative risk is high. The research shows that even if the weekly inhalation exposure dose (and therefore the calculated risk) is high, the number of Legionella pneumophila illness cases found can be equal to zero. This is probably due to the large uncertainty associated with QMRA determination. The size of the room in which the contaminated water is used also affects the possibility of infection.
    Źródło:
    Geology, Geophysics and Environment; 2021, 47, 1; 41-52
    2299-8004
    2353-0790
    Pojawia się w:
    Geology, Geophysics and Environment
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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