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    Wyświetlanie 1-10 z 10
    Tytuł:
    Prognosis of environmental impact of trace elements from brown coal-fired power plant Bełchatów
    Autorzy:
    Konieczyński, J.
    Komosiński, B.
    Jabłońska, M.
    Cieślik, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/204574.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    environment protection
    brown coal
    trace elements
    combustion products
    fl ue gas desulphurization (FGD) gypsum
    forecast of trace elements emission
    forecast of trace elements transfer
    Opis:
    A forecast of the negative impact exerted on the environment by selected trace elements in "Bełchatów" Power Plant has been prepared on the basis of the results of investigations into these elements’ distribution carried out as part of earlier research on coal from “Bełchatów” Field and the data on updated analyses of the content of these elements in 55 brown coal samples from test boreholes. Work in "Bełchatów" Power Plant, which is supplied with coal from "Szczerców" Field, will be accompanied by trace elements transfer. On the basis of the conducted investigations it has been found that the biosphere is most threatened by mercury emissions. As shown by the presented results of analyses and calculations, the emissions of mercury in "Bełchatów" Power Plant are low. Mercury is accumulated chiefly in gypsum produced in the FGD plant. The content of mercury in slag and ash is low.
    Źródło:
    Archives of Environmental Protection; 2012, 38, 3; 59-72
    2083-4772
    2083-4810
    Pojawia się w:
    Archives of Environmental Protection
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Soil polychemical contamination on Beliy Island as key background and reference plot for Yamal region
    Autorzy:
    Abakumov, Evgeny
    Shamilishviliy, Georgy
    Yurtaev, Andrey
    Powiązania:
    https://bibliotekanauki.pl/articles/2042166.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Arctic
    polycyclic aromatic compounds
    reference landscapes
    soil contamination
    trace elements
    Yamal
    Źródło:
    Polish Polar Research; 2017, 38, 3; 313-332
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Trace Elements (Co, Cr) on the Microstructure and Physical Properties of Al-Si-Cu-Mg-Fe Extruded Alloy
    Autorzy:
    Ahn, S. S.
    Sharief, P.
    Lee, C. H.
    Son, H. T.
    Kim, Y. H.
    Kim, Y. C.
    Hong, S.
    Hong, S. J.
    Powiązania:
    https://bibliotekanauki.pl/articles/352787.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Al-Si alloy
    microstructure
    extrusion
    coefficient of thermal expansion
    trace elements
    Opis:
    Trace elements Co, Cr were added to investigate their influence on the microstructure and physical properties of Al-Si extruded alloy. The Co, Cr elements were randomly distributed in the matrix, forms intermetallic phase and their existence wereconfirmed by XRD, EDS and SEM analysis. With addition of trace elements, the microstructure was modified, Si particle size was reduced and the growth rate of β-(Al5 FeSi) phase limited. Compared to parent alloy, hardness and tensile strength were enhanced while the linear coefficient of thermal expansion (CTE) was significantly reduced by 42.4% and 16.05% with Co and Cr addition respectively. It is considered that the low CTE occurs with addition of Co was due to the formation of intermetallic compound having low coefficient of thermal expansion. The results suggested that Co acts as an effective element in improving the mechanical properties of Al-Si alloy.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 3; 857-862
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of contamination of recent sediments of a large reservoir in the catchment of Arctic Ocean, Northern Europe
    Autorzy:
    Slukovskii, Zakhar
    Belkina, Natalia
    Potakhin, Maxim
    Powiązania:
    https://bibliotekanauki.pl/articles/2041767.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Arctic
    Vygozero Reservoir
    freshwater sediments
    trace elements
    long-range transport of pollutants
    Źródło:
    Polish Polar Research; 2021, 42, 1; 25-43
    0138-0338
    2081-8262
    Pojawia się w:
    Polish Polar Research
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of possible application of geochemistry to distinguish limnic and paralic coal-bearing parts of the carboniferous in the Upper Silesian Coal Basin
    Ocena możliwości zastosowania badań geochemicznych do identyfikacji limnicznych i paralicznych warstw karbonu produktywnego Górnośląskiego Zagłębia Węglowego
    Autorzy:
    Kokowska-Pawłowska, M.
    Krzeszowska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/219320.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    geochemia
    korelacja stratygraficzna
    wskaźniki geochemiczne
    pierwiastki śladowe
    geochemistry
    stratigraphic correlation
    geochemical ratios
    trace elements
    Opis:
    The paper presents the results of geochemical analyses of samples from the Poruba Beds of the paralic series and from the Zaleskie Beds of the limnic series Upper Silesian Coal Basin (USCB). The contents of the following trace elements and oxides were evaluated using spectrometric method: Cr, Th, U, V, AL2O3, MgO, K2O, P2O5. The following indicators, most commonly used in chemostratigraphy and in the identification of the marine and non-marine sediments ratios, were analyzed: U, Th, Th/U, K2O, Th/K2O, P2O5, Al2O3, P2O5/ Al2O3, V, Cr, V/Cr, and (K2O/Al2O3) / (MgO/Al2O3). The research showed that those ratios may be used to identify sedimentary environments and geochemical correlations of the sedimentary rock sequences in the USCB. Geochemical ratios discussed in the paper allowed distinguishing two populations of samples representing paralic and limnic series.
    W artykule zaprezentowano wyniki badań geochemicznych próbek z warstw Porębskich z serii paralicznej i z warstw Załęskich z serii limnicznej Górnośląskiego Zagłębia Węglowego (GZW). Metodą spektrometryczną oznaczono zawartość następujących pierwiastków śladowych i tlenków: Cr, Th, U, V, AL2O3, MgO, K2O, P2O5. Analizowano najczęściej stosowane, w chemostratygrafii i identyfikacji osadów morskich i niemorskich, wskaźniki: U, Th, Th/U, K2O, Th/K2O, P2O5, Al2O3, P2O5/Al2O3, V, Cr, V/Cr, (K2O/Al2O3) / (MgO/Al2O3). Badania wykazały, że wskaźniki te z powodzeniem mogą być stosowane do identyfikacji środowisk sedymentacyjnych i korelacji sekwencji skał osadowych w GZW. Geochemiczne wskaźniki zastosowane w pracy pozwoliły wyróżnić dwie populacje próbek reprezentujących serię paraliczną i limniczną.
    Źródło:
    Archives of Mining Sciences; 2017, 62, 4; 717-730
    0860-7001
    Pojawia się w:
    Archives of Mining Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dependences between certain petrographic, geochemical and technological indicators of coal quality in the limnic series of the Upper Silesian Coal Basin (USCB), Poland
    Autorzy:
    Parzentny, Henryk R.
    Róg, Leokadia
    Powiązania:
    https://bibliotekanauki.pl/articles/1853840.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    jakość węgla
    węgiel kamienny
    pierwiastki
    coal quality
    major and trace elements
    correlations
    bituminous coal
    USCB
    Opis:
    This article aims to assess the values of the most often measured petrographic, geochemical and technological indicators of coal quality and to identify probable dependences between them in the USCB coal. The following can also be observed: high content of Cd and Co in carbonate minerals separated from coal, in clay minerals – Cr and Zn, and in sulfide minerals – Cu, Ni and Pb. Nevertheless, it is organic matter which has the greatest influence on the average content of trace elements in coal. Correlations between the values of some of the indicators of coal quality were also observed. It has been observed that the increase in vitrinite content in coal is accompanied by a decrease in, while an increase in the content of liptinite and inertinite in coal is accompanied by an increase in the content of CaO, MgO, and SO3 in coal ash. An increase in the carbonization of organic matter is accompanied by an increase in the content of Cu and Ni in coal, and a decrease in the content of Pb and S in coal and the content of Fe2O3 in coal ash.
    Źródło:
    Archives of Mining Sciences; 2020, 65, 3; 665-684
    0860-7001
    Pojawia się w:
    Archives of Mining Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Initial assessment of variability in the modes of occurrence of some trace elements in coal seams with vertical profiles in the Upper Silesian Coal Basin in Poland
    Autorzy:
    Parzentny, Henryk R.
    Róg, Leokadia
    Powiązania:
    https://bibliotekanauki.pl/articles/1853846.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    węgiel kamienny
    pierwiastek śladowy
    Górnośląskie Zagłębie Węglowe
    mode of occurrence
    trace elements
    variability
    bituminous coal
    USCB
    Opis:
    Knowledge of the way in which minor and trace elements occur in coal is one of the most important geochemical indicators of coal quality. The differences between the methods of binding elements in coal in each coal seam and the variability of this feature of coal in the basin profile have not been discussed so far. These coal features were identified in a group of selected coal seams (209, 401, 405, 407, 501, 504, 510, 615, 620) in the Upper Silesian Coal Basin (USCB). At the same time, the differences in the role of identified mineral and maceral groups in concentrating specific elements in coal is highlighted. Identical or similar tendencies of changes in the way in which As and V, Ba and Rb, Co and Pb, Co and Zn, Mn and Pb, Pb and Zn, Co and Rb, and for Cr and Cu occur in the coal seams in the USCB profile was found. Changes in the mode of occurrence of As and Pb in coal in the USCB profile were probably influenced by carbonate mineralization. The changes in the mode of occurrence of Mni and Pb in the coal were probably determined by dia and epigenetic sulfide mineralization, while the content of Ba, Cr, Rb, Sr, and V in coal from these deposits was affected by clay minerals. It was observed that the greater the degree of the carbonization of the organic matter of coal, the lower the content of As, Mn and Pb in coal and the higher the content of Ba and Sr in coal.
    Źródło:
    Archives of Mining Sciences; 2020, 65, 4; 723-736
    0860-7001
    Pojawia się w:
    Archives of Mining Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Floodplain morphodynamics and distribution of trace elements in overbank deposits, Vistula River Valley Gorge near Solec nad Wisłą, Poland
    Autorzy:
    Falkowska, E.
    Falkowski, T.
    Tatur, A.
    Kałmykow-Piwińska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/139244.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Vistula river
    Gorge reach
    fluvial processes
    alluvial deposits
    trace elements
    Polska
    Wisła
    procesy fluwialne
    osady aluwialne
    mikroelementy
    Polska
    Opis:
    Geological and geochemical investigations were carried out in the floodplain of the Vistula River Valley gorge near Solec nad Wisłą (Małopolska Gorge of the Vistula River). Geological mapping was supported by DEM and remote sensing analysis. Sediment samples were taken from depths of 0.5 m and 1.5 m from all geomorphological features identified. The geochemical analysis included determination of Cr, V, Sr, Ba, Ni, Cu, Co, As, Pb and Zn concentrations. Results indicate that the main factors affecting the pattern of features in the floodplain of this area are (1) the highly dynamic flood flow in the narrow section of the gorge and (2) the relief of the top surface of the sub-alluvial basement. The variable concentrations of trace elements are closely related to the floodplain features. Their concentrations can be considered as valuable geochemical proxies that enable a more thorough reconstruction of the sedimentary evolution of the Vistula River Valley and other similar river valleys, especially in gorge sections.
    Źródło:
    Acta Geologica Polonica; 2016, 66, 3; 541-559
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Regional hardening of Upper Cretaceous Chalk in eastern England, UK: trace element and stable isotope patterns in the Upper Cenomanian and Turonian Chalk and their significance
    Autorzy:
    Jeans, C. V.
    Long, D.
    Hu, X.-F.
    Mortimore, R. N.
    Powiązania:
    https://bibliotekanauki.pl/articles/139436.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    chalk hardening
    trace elements
    stable isotopes
    cement modelling
    reservoir diagenesis
    history
    kreda
    hartowanie
    pierwiastki śladowe
    izotopy trwałe
    cement
    historia
    Opis:
    The regional hardening of the Late Cenomanian to Early Turonian Chalk of the Northern Province of eastern England has been investigated by examining the pattern of trace elements and stable carbon and oxygen isotopes in the bulk calcite of two extensive and stratigraphically adjacent units each 4 to 5 m thick of hard chalk in Lincolnshire and Yorkshire. These units are separated by a sequence, 0.3–1.3 m thick, of variegated marls and clayey marls. Modelling of the geochemistry of the hard chalk by comparison with the Standard Louth Chalk, combined with associated petrographic and geological evidence, indicates that (1) the hardening is due to the precipitation of a calcite cement, and (2) the regional and stratigraphical patterns of geochemical variation in the cement are largely independent of each other and have been maintained by the impermeable nature of the thin sequence of the clay-rich marls that separate them. Two phases of calcite cementation are recognised. The first phase was microbially influenced and did not lithify the chalk. It took place predominantly in oxic and suboxic conditions under considerable overpressure in which the Chalk pore fluids circulated within the units, driven by variations in compaction, temperature, pore fluid pressure and local tectonics. There is evidence in central and southern Lincolnshire of the loss of Sr and Mg-enriched pore fluids to the south during an early part of this phase. The second phase of calcite precipitation was associated with the loss of overpressure in probably Late Cretaceous and in Cenozoic times as the result of fault movement in the basement penetrating the overlying Chalk and damaging the seal between the two chalk units. This greatly enhanced grain pressures, resulting in grain welding and pressure dissolution, causing lithification with the development of stylolites, marl seams, and brittle fractures. Associated with this loss of overpressure was the penetration of the chalk units by allochthonous fluids, rich in sulphate and hydrocarbons, derived probably from the North Sea Basin. Microbial sulphate-reduction under anoxic conditions within these allochthonous fluids has been responsible for dissolving the fine-grained iron and manganese oxides within the chalk, locally enriching the Fe and Mn content of the calcite cement. The possibility is discussed that the pattern of cementation preserved in these regionally hard chalks of Late Cenomanian and Early Turonian age may be different from that preserved in the younger (late Turonian to Campanian) more basinal chalks of eastern England.
    Źródło:
    Acta Geologica Polonica; 2014, 64, 4; 419-455
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Geochemical and stable isotope patterns of calcite cementation in the Upper Cretaceous Chalk, UK: Direct evidence from calcite-filled vugs in brachiopods
    Autorzy:
    Hu, X.
    Jeans, C.
    Dickson, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/139259.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cement kalcytowy
    diageneza
    historia
    izotopy stabilne
    kreda
    pierwiastki śladowe
    wpływ drobnoustrojów
    anoxia
    calcite cement
    chalk
    diagenesis
    history
    Microbial influence
    oxia
    stable isotopes
    suboxia
    trace elements
    Opis:
    The history of research into the cementation of the Upper Cretaceous Chalk of the UK is reviewed. Calcite-filled vugs within the shell cavities of terebratulid brachiopods from the Cenomanian Chalk of eastern england have been investigated by cathodoluminesence imaging, staining, electron microprobe and stable isotope analysis. This has provided the first detailed analysis of the geochemistry of the Chalk.s cement. two cement series, suboxic and anoxic, are recognized. Both start with a Mg-rich calcite with positive [delta^13]C values considered to have been precipitated under oxic conditions influenced by aerobic ammonification. The suboxic series is characterized by positive [delta^13]C values that became increasingly so as cementation progressed, reaching values of 3.5[per mil]. Manganese is the dominant trace element in the earlier cement, iron in the later cement. Mn-and Fe-reducing microbes influenced cement precipitation and the trace element and [delta^13]C patterns. The anoxic series is characterized by [delta^13]C values that became increasingly negative as cementation progressed, reaching values of .6.5[per mil]. Trace elements are dominated by iron and manganese. Sulphate-reducing microbes influenced cement precipitation and the trace element and [delta^13]C patterns. Both cement series are related closely to lithofacies and early lithification pre-dating the regional hardening of the Chalk. The suboxic series occurs in chalk which was continuously deposited and contained hematite pigment and limited organic matter. The anoxic series was associated with slow to nil deposition and hardground development inc halks that originally contained hematite pigment but no longer do so, and an enhanced supply of organic matter.
    Źródło:
    Acta Geologica Polonica; 2012, 62, 2; 143-172
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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