Wyniki wyszukiwania - BazTech

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Badania wpływu minerałów hunterytu/hydromagnezytu oraz kalcytu pod kątem niepalności i właściwości mechanicznych kompozytów drzewnych

Atay Gül Yilmaz, Loboichenko Valentyna, Wilk-Jakubowski Jacek Łukasz

Cement Wapno Beton

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2024

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R. 29, nr 1

40--53

PL

W pracy zbadano właściwości dodatków mineralnych w kompozytach drzewnych, które wpływają na palność materiału, a jednocześnie są przyjazne dla środowiska. W artykule poddano analizie wyniki pomiarów kompozytów drewnianych, będących naturalnym materiałem budowlanym wielu domów, a także elementów ich wyposażenia. Jako matrycę zastosowano trociny drzewne. W pracy zbadano wpływ współobecności kalcytu i minerału mieszanego huntyt/hydromagnezyt. Kalcyt zastosowano jako minerał pomocniczy oprócz huntytu/hydromagnezytu, w celu uzyskania lepszego środka zmniejszającego palność zgodnie z normą UL94 i właściwości mechanicznych kompozytu drzewnego, takich jak wytrzymałość na zginanie i moduł sprężystości przy zginaniu. Uzyskane wyniki oceniano w zależności od zawartości składników mineralnych w kompozytach. Wyniki wykazały, że próbka 40S/50H/10C jest optymalna pod względem stosunku modułu sprężystości do niepalności. Materiały ognioodporne można stosować w budownictwie, a także w elektrotechnice, np. w gaśnicach akustycznych [np. do budowy falowodu].

EN

This work examines the characteristics of mineral additives in wood composites that affect the fire retardant properties of the material, and at the same time are environmentally friendly. The paper analyzes the results of measurements for wood composites, which is the natural building material of many houses, as well as elements of their furnishings. Sawdust waste was applied as a matrix. In the paper, a co-presence effect of calcite and huntite/hydromagnesite mineral was investigated. The calcite mineral was used as auxiliary minerals in addition to the huntite/hydromagnesite mineral to obtain a better flame retardant according to the UL94 standard and mechanical properties in the wood composite, such as flexural strength and flexural modulus. The results obtained were measured and evaluated depending on the mineral content of the composites. The results indicated that sample 40S/50H/10C is the most optimal in terms of the ratio of the modulus of flexibility and fire retardant characteristics. Fire retardant materials can be used in the construction industry, as well as in the electrical engineering applications, such as for acoustic fire extinguishers [e.g. for waveguide construction].

2

Protective Disposable Face Masks Used During the COVID-19 Pandemic as a Source of Pollutants in the Aquatic Environment – A Study of Short-Term Effects

Loboichenko Valentyna, Leonova Nataliia, Shevchenko Olga, Blyashenko Oleg, Soshinskiy Alexander, Servatyuk Vasyl, Tregub Nataliia, Khmyrov Ihor, Burmenko Oleksandr

Ecological Engineering & Environmental Technology

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2023

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Vol. 24, iss. 1

84--92

EN

The paper examines the impact of protective equipment used during the COVID-19 pandemic on the environment. The impact of protective face masks on the aquatic environment was analyzed in more detailed way. The amount of protective face masks penetrated into the environment as a result of the COVID-19 pandemic and their role in the increase of plastic and microplastic things in the environment was noted. The aim of the work was to study the migration of a number of metals from disposable protective masks into the aquatic environment in the short term. Using the method of atomic absorption spectroscopy, the value of Cu, Pb, Mn, Zn, Fe in the investigated model systems containing protective disposable face masks was obtained by varying the pH of the aqueous medium. It was found that for manganese, lead and iron there is a permanent (Mn) or temporary (Pb, Fe) excess of these metals in the aquatic environment according to national and European standards. The probable possibility of sorption effects and the need for further research in this direction were noted.

3

Analysis of the Influence of Anthropogenic Factors of the Urbanized Territory of Poltava Region (Ukraine) on the State of River Water

Strelets Victor, Loboichenko Valentyna, Leonova Nataliia, Shevchenko Roman, Telelim Vasilii, Strelets Valerij, Shevchenko Olga, Burmenko Oleksandr

Ecological Engineering & Environmental Technology

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2022

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Vol. 23, iss. 2

185--192

EN

The analysis of anthropogenic factors influencing the state of natural water is carried out in the work. The need for a detailed study of the impact of urban areas on river water quality is noted. The study of the state of one of the main rivers of Poltava region in the area of about 100 km during the winter-spring period on the parameter of mineralization. The influence of individual settlements on the water status of the Vorskla River is considered. There was a gradual increase in river water pollution in the studied area and an increase in mineralization from 660 to 820 mg/l (February) and from 500 to 580 mg/l (April) (Sr = 2%). It was found that the greatest anthropogenic impact on the state of the Vorskla River is in the area of Poltava - Novi Sanzhary. The influence of surface runoff on changes in surface and groundwater quality of Poltava region is shown.

4

Spatiо-Temporal Study of the Ecological State of Water Bodies Located within the Detached Objects of the Urbanized Territory of Ukraine

Loboichenko Valentyna, Leonova Nataliia, Shevchenko Roman, Strelets Victor, Morozov Andriy, Pruskyi Andrii, Avramenko Oleksandr, Bondarenko Serhiy

Ecological Engineering & Environmental Technology

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2021

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Vol. 22, iss. 6

36--44

EN

The paper considers the impact of urbanized areas on the state of water bodies. The impact of various types of anthropogenic activities on water bodies located in cities was shown. In towns, there is worse water resource management than in large cities and the necessity of conducting more detailed research. Using the method of direct conductometry, a spatio-temporal study of the ecological state of water bodies located within the detached objects of the urbanized territory of the Ukraine was carried out using the example of Popasna town. It was shown that fluctuations in the electrical conductivity of these bodies are mainly due to the influence of surface runoff. It was found that in all studied ponds there was a significant drop in the electrical conductivity of water in March 2021, followed by an increase and stabilization in April and May 2021, the characteristic values of electrical conductivity range from 200 to 2900 μS, the relative standard deviation did not exceed 1.5%. The necessity of conducting further, more detailed study of the features of the influence of surface runoff on the water condition in the studied ponds was shown for the purpose of rational management of these water bodies.

5

Assessment of the Impact of Natural and Anthropogenic Factors on the State of Water Objects in Urbanized and Non-Urbanized Areas in Lozova District (Ukraine)

Loboichenko Valentyna, Leonova Nataliia, Shevchenko Roman, Kapustnik Anna, Yeremenko Serhii, Pruskyi Andrii

Ecological Engineering & Environmental Technology

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2021

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Vol. 22, iss. 2

59--66

EN

The paper analyzes the impact of urban areas on the state of water objects which are under the influence of these areas. Furthermore, the temporal regularities of the oscillations in electrical conductivity in a number of water objects in Lozova Town and Lozova District (Ukraine) were obtained using the method of conductometry. It was discovered that there was no significant anthropogenic impact on the studied water objects in Lozova Town and Lozova District of Kharkiv Region. The fluctuations in conductivity are mainly related to surface runoff. It was shown that the water in Lozova Town and Lozova District is characterized by electrical conductivity values in the range from 2000 μS to 3000 μS.