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Wyświetlanie 1-6 z 6
Tytuł:
Corrosive behavior of pipeline steel 17G1C and 13G1C-U in environments NS1-NS3
Procesy korozyjne stali rurociągowej 17G1C i 13G1C-U w środowiskach NS1-NS3
Autorzy:
Polutrenko, Miroslava
Hrytsuliak, Halyna M.
Kotsyubynsky, Andrij
Andrusiak, Uliana B.
Powiązania:
https://bibliotekanauki.pl/articles/31343920.pdf
Data publikacji:
2023
Wydawca:
Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:
pipe steel
model environment
corrosion rate
radiograph
stal rurowa
środowisko modelowe
szybkość korozji
radiogram
Opis:
Results of long-term exposure tests (20 months) of 17G1C and 13G1C-U pipeline steel samples in NS1-NS3 model environments (soil electrolyte imitations) are presented in the article. It was established that during the exposure of steel samples in the studied model environments the rate of corrosion processes depends on the component composition of the model environments, the grade of steel and pH. Regardless of the grade of steel, the highest corrosion rate was observed for the NS1 environment, while the corrosion rate for the NS3 environment was almost 21% lower. In the case of the NS2 model environment, the corrosion rate reduction for 17G1C steel was 38.68%, and for 13G1C-U steel – 28.75%, compared to the exposure of these samples in the NS1 environment. The calculated multiple coefficients of determination and linear correlation coefficients indicate a strong relationship between these indicators. The phase composition and structure of corrosion products were determined by the X-ray diffractometer Shimadzu XRD‑7000 using the method of X-ray structural analysis. On the basis of the obtained radiographs, the dominant form of iron oxide, which does not depend on the grade of steel, was determined for each environment. The research results have practical value and can be used in predicting the behavior of underground structures in soils of different corrosive activity.
W artykule przedstawiono wyniki badań długotrwałej ekspozycji (20 miesięcy) próbek stali rurociągowych 17G1C i 13G1C-U w środowiskach modelowych NS1-NS3 (imitacje elektrolitów glebowych). Na podstawie przeprowadzonych badań stwierdzono, że szybkość procesów korozyjnych zależy od zawartości poszczególnych składników w środowiskach modelowych, jak również od gatunku stali oraz od wielkości pH. Niezależnie od gatunku stali największą szybkość korozji zaobserwowano dla środowiska NS1, podczas gdy szybkość korozji dla środowiska NS3 była niższa o prawie 21%. W przypadku środowiska modelowego NS2 zmniejszenie szybkości korozji dla stali 17G1C wyniosło 38,68%, a dla stali 13G1C-U – 28,75%, w porównaniu do ekspozycji tych próbek w środowisku NS1. Obliczone wielokrotne współczynniki determinacji oraz współczynniki korelacji liniowej wskazują na silny związek między tymi wskaźnikami. Skład fazowy i strukturę produktów korozji określono za pomocą dyfraktometru rentgenowskiego Shimadzu XRD-7000, stosując metodę rentgenowskiej analizy strukturalnej. Na podstawie uzyskanych radiogramów dla każdego ośrodka określono dominującą formę tlenku żelaza, niezależną od gatunku stali. Wyniki badań mają wartość praktyczną i mogą być wykorzystane do przewidywania zachowania się podziemnych konstrukcji stalowych w gruntach o różnej aktywności korozyjnej.
Źródło:
Nafta-Gaz; 2023, 79, 4; 261-265
0867-8871
Pojawia się w:
Nafta-Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model of Biomass Productivity under the Influence of Change in the Phytotoxicity of Podzol Soil Due to Reintroduction of Sewage Sludge under Energy Willow
Autorzy:
Lopushniak, Vasyl
Hrytsuliak, Halyna
Polutrenko, Myroslava
Lopushniak, Halyna
Voloshyn, Yurii
Kotsyubynska, Yulia
Baran, Bagdana
Powiązania:
https://bibliotekanauki.pl/articles/2202311.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
energy willow
sewage sludge
productivity
productivity model
phytotoxicity
Opis:
Utilization of sewage sludge during phytoremediation of territories and its introduction as fertilizer for energy crops requires testing for phytotoxicity of the soil cover, which will allow determining an ecologically safe dose of its use and minimizing the negative impact on agroecosystems. It will also contribute to the formation of optimal productivity of agrophytocenoses as well as optimize the nutrition conditions for intensive growth and development of cultivated plants. The research conducted an analysis of the impact of the increase in phytotoxicity of sod-podzolic soil from the introduction of fresh sewage sludge and its composts with various organic materials (sawdust of coniferous trees, straw of grain crops) on the formation of biomass productivity of energy willow during a repeated cycle of cultivation. Regression and correlation analyses were used to build a mathematical model of biomass productivity under the influence of changes in the phytotoxicity of podzol soil due to repeated introduction of sewage sludge under the energy willow. The obtained regression dependences show that the formation of phytotoxicity of sod-podzolic soil is most affected by the increase in the content of Pb and Cd. However, the introduction of the norm of fresh SS within 80 t/ha did not lead to an increase in the content of these heavy metals above the maximum allowable concentrations, although it contributed to an increase in phytotoxicity to an above average level. The maximum predicted productivity, depending on the content of mobile forms of heavy metals in the soil, is about 60 t/ha at a content of Cd = 0.25; Ni = 1.1 Pb = 4.6 mg/kg soil. As the phytotoxicity of the soil increases to an above-average level (phytotoxic effect 40–46%), the intensity of biomass accumulation of energy willow slows down somewhat. In general, after a repeated cycle of using the plantation during the 4-year growing season of energy willow in all options where fertilizers were applied, the productivity of wood biomass increased significantly compared to the control option by 7.7–17.4 t/ha and with the smallest significant difference between the indicators of the research options 4.23 t/ha.
Źródło:
Journal of Ecological Engineering; 2022, 23, 12; 217--226
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of hydrate formation and concentration of salts on the corrosion of steel 20 pipelines
Autorzy:
Poberezhny, Lubomyr
Chudyk, Ihor
Hrytsanchuk, Andrii
Mandryk, Oleg
Kalyn, Tetyana
Hrytsuliak, Halyna
Yakymechko, Yaroslav
Powiązania:
https://bibliotekanauki.pl/articles/410213.pdf
Data publikacji:
2020
Wydawca:
STE GROUP
Tematy:
chloride media
formation water
internal hydrate corrosion
hydrate formation
Opis:
One of the ways to increase natural gas production is to conserve and/or intensify existing wells with their subsequent development. They are characterized by a high content of highly mineralized water, which leads to an increased risk of hydrate formation and internal corrosion. The issue of the formation of gas hydrates in industrial pipelines, which is a major problem for the exploitation of industrial gas pipelines, requires considerable attention to be made to exclude emergency situations. The main task of the study – to determine the effect of hydrates on the corrosion of the pipeline in order to prevent emergencies. A technique for studying the effect of hydration on the corrosion of pipelines has been developed. The combined analysis of the corrosion behavior of pipe material in aggressive media of chloride type was done. According to the results of corrosion-mechanical tests, regularities of joint action of mechanical stresses, concentration of chlorides and hydrate formation on the speed and localization of corrosion processes are established.
Źródło:
Management Systems in Production Engineering; 2020, 3 (28); 141-147
2299-0461
Pojawia się w:
Management Systems in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Biological Absorption of Chemical Elements in Topinambur Plants by Separation of Wastewater in Podzol Soil
Autorzy:
Lopushnyak, Vasyl
Hrytsuliak, Halyna
Kozova, Iryna
Jakubowski, Tomasz
Kotsyubynska, Yulia
Polutrenko, Miroslava
Kozan, Natalia
Powiązania:
https://bibliotekanauki.pl/articles/2173361.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
Jerusalem artichoke
Helianthus tuberosus
sewage sludge
biological uptake
correlation analysis
regression analysis
Opis:
The application of sewage sludge as a fertilizer in podzols soil ambiguously affects the peculiarities of the accumulation of certain chemical elements in various organs of the Jerusalem artichoke plants. Experimental factors in the study were different doses of sewage sludge from sludge maps of wastewater treatment plants and its compost with cereal straw, included together with the compensatory dose of mineral fertilizers to the norm N90P90K90 in the Jerusalem artichoke plantation. Determination of the content of chemical elements in soil and plants was carried out by X-ray fluorescence analysis. According to the results of research, it was established that the change of mineral nutrition conditions of Jerusalem artichoke causes significant changes in the chemical composition of its tubers and vegetative mass. Studies have shown a clear positive effect of increasing doses of SS on increasing the content in tubers: K – to 7.9%, Ca – to 1.9, Fe – to 1.9, in green mass: O – to 31.8%, K – to 31.6, Ca – to 24.9, Mg – to 5.9, Mn – to 0.7, Fe – to 0.4 and K – to 34.5%. The coefficients of biological absorption for most chemical elements are more than 1, but for O, Al, Si, Fe, these figures were less than 1. Regression models of phosphorus, potassium, calcium and magnesium content in the vegetative mass of Jerusalem artichoke indicate a high and moderate dependence of these indicators on their content in Jerusalem artichoke tubers and soil.
Źródło:
Journal of Ecological Engineering; 2022, 23, 9; 18--24
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Α Dynamics of Macro Elements Content in Eutric Podzoluvisols for Separation of Wastewater under Jerusalem Artichokes
Autorzy:
Lopushniak, Vasyl
Hrytsuliak, Halyna
Gamayunova, Valentina
Kozan, Natalia
Zakharchenko, Elina
Voloshin, Yurii
Lopushniak, Halyna
Polutrenko, Miroslava
Kotsyubynska, Yulia
Powiązania:
https://bibliotekanauki.pl/articles/2086370.pdf
Data publikacji:
2022
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
nitrogen
phosphorus
potassium
concentration factor
compost
Opis:
The application of fertilizers based on sewage sludge significantly affects the formation of the nitrogen fund of sod-podzolic soil, as well as changes in the content of mobile compounds of phosphorus and potassium exchange. The application of such fertilizer under Jerusalem artichoke has a positive effect on the nitrogen content of alkaline hydrolyzed compounds, in particular on increasing the content of mineral and alkaline hydrolyzed nitrogen fractions. The application of sewage sludge at a dose of 20–40 t/ha and the appropriate compensatory dose of mineral fertilizers at the rate of N90P90K90 helps to increase the content of ammonium nitrogen compounds from 16 to 20–22 mg/kg of soil in the upper (0–20 cm) layer – 28% prevails over the control variant, as well as the content of nitrate nitrogen compounds in the layer 0–40 cm from 1.70 to 2.52–2.64 mg/kg of soil. The ratio of the content of alkaline hydrolyzed nitrogen compounds to the nitrogen content of mineral compounds in the experimental conditions changes insignificantly, which indirectly indicates a relatively stable value of this indicator, which changes little under the influence of fertilizers. The application of sewage sludge as a fertilizer significantly affects the change in the content of mobile phosphorus compounds and potassium exchange compounds in the upper (0–40 cm) layer of the soil. However, from a depth of 60 cm, their content decreases sharply and approaches the initial values of the control version. Depending on the application of fertilizers, the indicators of the coefficient of concentration of macronutrients in the soil change significantly, which reflects the ratio of the content of the element in the soil to its content in the control variant. As the rate of sewage sludge increases, the element concentration coefficient increases from 1.27 in the variant with the application of only mineral fertilizers to 2.36 for potassium and for phosphorus – from 1.02 to 1.31. There is a close correlation between the content of phosphorus and potassium in the soil and the coefficients of their concentration. This relationship reflects the multiple coefficient of determination, which for phosphorus and potassium is R2 = 0.69 and R2 = 0.90, respectively. The use of fertilizers in the form of compost with sewage sludge and straw of cereals causes similar trends as the introduction of uncomposted sewage sludge. However, this effect has less radical impact with lower absolute nutrient content compared to the introduction of fresh sewage sludge. The application of sewage sludge in the form of compost and uncomposted form contributes to a significant increase in the content of macronutrients in the soil, providing an improvement in the mineral nutrition of cultivated plants, including Jerusalem artichokes.
Źródło:
Journal of Ecological Engineering; 2022, 23, 4; 33--42
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Prognostic Models of Panicum virgatum L. Using Artificial Neural Networks
Autorzy:
Lopushniak, Vasyl Ivanovych
Hrytsuliak, Halyna Myhaylovna
Bykin, Anatoliy Viktorovych
Bordyuzha, Nadia Petryvna
Semenko, Larysa Oleksandryvna
Polutrenko, Myroslava Stepanivna
Kotsyubynska, Yulia Zinoviyivna
Powiązania:
https://bibliotekanauki.pl/articles/2028041.pdf
Data publikacji:
2021
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
switchgrass
productivity
biomass
sewage sludge
precipitate
artificial neural network
Opis:
The article shows the possibility of using modern methods of artificial intelligence to calculate the yield of biomass of crops according to the given set input data (fertilizer doses, agrochemical parameters of the soil, productivity). The study reflects the results of testing a model of a computer program of an artificial neural network, which allowed forecasting the yield of Panicum virgatum L. (Switchgrass) depending on the joint application of fertilizers mineral and precipitate. On the basis of the calculations, the obtained model of productivity of vegetative mass of switchgrass shows a high level of forecasting efficiency (up to 97%). According to the results of experimental studies, the use of sewage sludge at a doses of 20–40 t/ha provides a dry biomass yield of Panicum virgatum L. (Switchgrass) in the range of 13.1–20.3 t/ha, which is 3.4–7.2 t/ha more than in the option without fertilizer.
Źródło:
Journal of Ecological Engineering; 2021, 22, 11; 62-71
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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