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Wyświetlanie 1-3 z 3
Tytuł:
Evaluation of ground pollution by hydrocarbons using Rock-Eval pyrolysis
Autorzy:
Więcław, Dariusz
Sadlik, Maria
Powiązania:
https://bibliotekanauki.pl/articles/779796.pdf
Data publikacji:
2019
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
Rock-Eval
oil
lubricants
ground pollution
petrol station
Opis:
The exploration and utilization of petroleum are potential hazards to the environment. Successful determination of petroleum contamination in ground relies on accurate definition of the type, source and quantity of contaminant. For this purpose the Rock-Eval® pyrolysis was applied, which is a rapid quantitative (Bulk Rock method) and qualitative (fractional composition using Multi-Heating Rates method) technique. Results of Rock-Eval analysis of 13 samples of concrete and 2 samples of gravel taken from the different sites of the petrol station indicate the highest concentration of light hydrocarbons (gasoline and naphtha fractions), up to over 5% wt. in the direct proximity of petrol pumps. Similarly high contamination (almost 4%wt.), was found near fuel tanks. Here the highest contribution has lubricating oil fraction and the tankers providing fuels are probably the source of this pollution. In the gravel collected in the vicinity of the fuel tanks high concentration (over 5 wt.%) of non-pyrolyzable carbon (soot) was recorded, the source of which are probably diesel engines of fuel tankers supplying fuel.
Źródło:
Polish Journal of Chemical Technology; 2019, 21, 3; 8-12
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative petrography and organic geochemistry of different types of organic matter occurring in the Outer Carpathians rocks
Autorzy:
Zielińska, Magdalena
Fabiańska, Monika
Więcław, Dariusz
Misz-Kennan, Magdalena
Powiązania:
https://bibliotekanauki.pl/articles/2058565.pdf
Data publikacji:
2020
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
Polish Outer Carpathians
redeposited organic matter
organic matter petrography
thermal maturity
biomarkers
Rock-Eval
Opis:
The characterization of organic matter (OM) in sedimentary rocks is important in many types of biological, geological and environmental research. The integrated use of microscopy and geochemistry, as here, is particularly useful in any attempt to define the origin and evolution of OM in sedimentary basins. The organic petrography and geochemistry different types of allogenic and authigenic OM from the Polish Outer Carpathian (POC) rocks were studied in present study to compare their genetic type, thermal maturity, depositional environment and post-sedimentation processes. Special attention was paid to redeposited coal clasts occurrences. The used techniques show differences in organic matter type originating from various sources. The organic petrography analysis shows that redeposited coal clasts (CC) and terrigenous organic matter (TOM) are composed predominantly of woody material (the gas-prone Type-III kerogen). Similar results were obtained during the Rock-Eval pyrolysis. Moreover, the GC-MS analysis of extracts indicated the additional source of OM, namely planktonic organic matter (POM) with oil-prone kerogen Type-I or II. This OM is in some cases high thermally mature and could potentially has allochthonous origin. The n-alkane, saturated and aromatic biomarker data revealed deposition of this POM in anoxic deltaic or close-shore sedimentary environments whereas the redeposited coal clasts were probably originally deposited in coal swamps as were the Upper Silesian bituminous coals.
Źródło:
Geological Quarterly; 2020, 64, 1; 165--184
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermogenic gases generated from coals and shales of the Upper Silesian and Lublin basins : hydrous pyrolysis approach
Autorzy:
Kotarba, Maciej J.
Bilkiewicz, Elżbieta
Jurek, Krzysztof
Waliczek, Marta
Więcław, Dariusz
Zych, Hieronim
Powiązania:
https://bibliotekanauki.pl/articles/2059608.pdf
Data publikacji:
2021
Wydawca:
Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
Tematy:
hydrous pyrolysis gas
gaseous hydrocarbon
carbon dioxide
molecular nitrogen
stable C, H, N isotopes
Upper Silesian
Lublin Coal basins
Opis:
In order to provide a better characterization of the origin and volume of thermogenic gas generation hydrous pyrolysis (HP) experiments were performed on coals and shales at 330 and 360oC for 72 hours. The maturity range of coals and shales used for HP varies from 0.57 to 0.92% Ro. The maturity increase caused by HP at 330 and 360oC ranges from 1.32 to 1.39% and from 1.71 to 1.83%, respectively. δ13C of CH4, 2H6, C3H6 and n-C4H10 in HP gases versus their reciprocal C-number have a concave relationship, and therefore do not follow a linear trend. δ2H of CH4, 2H6 and C3H6 in HP gases versus their reciprocal H-number show both linear and convex-concave relationships. The growth of CO2 yields during HP was higher for shales than for coals. H2S yields from shales are higher than from coals, which can be connected with catalytic and adsorbed influence of shale matrix. H2 was also generated in notable quantities from water and organic matter of coals and bigger amounts from shales. N2 yields grow with the increase of Ro after 3oC HP and it is more enriched in 15N isotope than after 330C.
Źródło:
Geological Quarterly; 2021, 65, 2; 65: 26
1641-7291
Pojawia się w:
Geological Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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