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Wyświetlanie 1-2 z 2
Tytuł:
Economic Centrism Of Business Entities In Modern Financial Development
Autorzy:
Yasynska, Nadiia
Tarasenko, Olena
Tanchyk, Olena
Powiązania:
https://bibliotekanauki.pl/articles/476233.pdf
Data publikacji:
2019
Wydawca:
Wyższa Szkoła Ekonomiczno-Humanistyczna w Bielsku-Białej
Tematy:
economic development
financial development
finance
capital
world trade
market mechanism
economic entities
Opis:
The aim of the article is to identify the characteristics and specifics of economic centrism of economic entities in modern financial development. The hypothesis of research that central planning is not possible for market development, and on the other hand, the diversity and adaptability of human behaviour in the economic sphere is the most significant circumstance of computational complexity that exceeds human or machine properties in search of an optimal solution. The research analyses the problem development through the time with highlighting main ideas, pros and cons, threats and opportunities. The paper states that the current financial and economic development of modern local economies of the world. It is impossible to expect that increasing the capacity of international markets in the near future will allow loading them at the expense of own demand for productive forces. This requires that the productive forces and demand of the population has to reach the level that is capable of restoring working capital in the volumes of full loading of fixed capital with a unified distribution and redistribution of the by-product. The main conclusions focus on statement that further economic development, the finances of economic entities, as generators and recipients of an additional product, take a leading position in initiating and introducing new principles of socio-economic coexistence within the state and the financial system.
Źródło:
MIND Journal; 2019, 8; 1-11
2451-4454
Pojawia się w:
MIND Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Acid Modification on Porous Structure and Adsorption Properties of Different Type Ukrainian Clays for Water Purification Technologies
Autorzy:
Budash, Yrii
Plavan, Viktoriia
Tarasenko, Nataliia
Ishchenko, Olena
Koliada, Maksym
Powiązania:
https://bibliotekanauki.pl/articles/24201684.pdf
Data publikacji:
2023
Wydawca:
Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:
montmorillonite
palygorskite
acid modification
acid-activated clay
sorption capacity
water purification technology
Brunauer-Emmette-Teller method
density functional theory method
Opis:
Clay minerals, as adsorbents, are widely available, have large specific surface area, and the ability for cation exchange, which makes them applicable in wastewater treatment from heavy metal ions. This study investigated the effect of acid modification on the porous structure and adsorption properties of montmorillonite (MMT) and palygorskite (PAL) clays of the Cherkasy deposit (Ukraine). Acid modification of clay samples was carried out with chloride acid after preliminary refining. Clay particles were analyzed using optical polarization microscopy with recording of digital images of the study. The area and perimeter of individual particles of clay samples were determined. The equivalent diameter and shape factor were calculated. The porosity characteristics of the samples were determined. Pore surface area was calculated by the Brunauer-Emmette-Teller (BET) method. Total volume, mean diameters, and pore size distribution were obtained using the Density Functional Theory (BFT) method. Acid modification improved the porous structure of clay samples. BET surface area of the pores of the initial sample of palygorskite clay is significantly higher compared to the montmorillonite type clay (140.66 and 83.61 m2/g, respectively). Acid modification of the PAL sample contributes to an increase in the BET surface area by approximately 1.7 times. Acid modification increases the surface area and total pore volume by approximately 2.3 times for MMT samples and 1.76 times for PAL samples. Dimensional characteristics of the pores of the MMT sample were to shift after activation, while for the PAL sample, their average size increases sharply by approximately 3.2 times. This suggested the additional formation of pores in the interfibrillar regions of the PAL sample during its acid activation. The effect of acid modification on the sorption capacity was investigated by means of methylene blue exhaustion. Sorption efficiency increases by 6-14%, compared to unmodified samples and is determined by the contact time and the type of clay. Increasing the contact time from 24 to 72 hours leads to an increase in the sorption efficiency of activated MMT and PAL samples by 36 and 30%, respectively. Acid-activated clay minerals, in particular montmorillonite, can be used as part of sorption elements to increase the efficiency of wastewater treatment technologies from heavy metal ions.
Źródło:
Journal of Ecological Engineering; 2023, 24, 5; 210--221
2299-8993
Pojawia się w:
Journal of Ecological Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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