scholarly journals Ecotoxicological assessment of the impact of pavement material on roadside soil pollution

2021 ◽  
Vol 5 (47) ◽  
pp. 7-7
Author(s):  
Alexander Saakian ◽  
◽  

The ecological safety of the use of nepheline sludge in the construction of the lower foundations of pavements is shown. Using electron microscopy and chemical analysis, the area of influence of nepheline sludge used in the construction of road pavements on the roadside soil, which is limited by a distance of 10 m, was determined. Studies have been carried out on ecotoxicity using monocotyledonous and dicotyledonous plants and soil infusories of the genus Colpoda steinii. results, which confirmed the possibility of using nepheline sludge as a component of pavement in the form of nepheline-crushed stone mixture. Keywords: NEPHELINE SLAM, PAVEMENT MATERIAL, ECOLOGY, TOXICITY, ENVIRONMENTAL SAFETY

Author(s):  
Justyna Kujawska ◽  
Katarzyna Wójcik-Oliveira

Sewage sludge and its management constitute one of the most important environmental problems. The introduced the Sewage Sludge Directive 86/278/EEC advocate utilization of sewage sludge in agriculture. However, this method is limited mainly by the availability of heavy metals and pathogens. An ecotoxicological assessment of sewage sludge doses applied to soil, recommended in the Polish Regulation of the Minister of Environment of 6th February 2015 on municipial sewage sludge, was carried out. The sewage sludge was added to soil in the amounts of 3, 6, 9, and 15 Mg/ha. The produced mixtures were subjected to physicochemical and ecotoxicological tests, involving the biomass and mortality tests of Eisenia fetida earthworms. The sewage sludge had a statistically significant impact on the increase in: electrical conductivity, total exchangeable cations, organic matter content, organic carbon, nitrogen and heavy metals of the considered soil. The impact on the biomass of earthworms was different; after 7 days in the mixtures with 3 Mg/ha and 6 Mg/ha sewage sludge addition, the biomass increased approximately by 1.3-fold, in comparison to non-modified soil. At 9 Mg/ha, it reduced by 1.3-fold, whereas at 15 Mg/ha – by 16-fold, in relation to the initial value. The studies indicated that the ecotoxicological assessment of wastes may be employed as environmental safety control measure of the sewage sludge application in agriculture.


2020 ◽  
Vol 22 ◽  
pp. 5-11
Author(s):  
P. Bosak ◽  
O. Stokalyuk ◽  
O. Korolova ◽  
V. Popovych

Introduction. In the industrial regions of Ukraine, the structure of nature formed over a long period without objective laws of development and recovery of natural resource systems and ecosystems. All natural ecosystems (atmosphere, hydrosphere, lithosphere and biosphere) have undergone forceful anthropogenic pressure. Chemical, radioactive and other pollution of the natural environment causes various, often incurable diseases, irreversible changes in the genetic structure of cells, which leads to an increase in the birth rate of defective generations. A special place in this context takes ecological safety in mining complexes. Mining complexes interrelated processes of human impact on the environment to provide raw materials and energy resources of various fields of economic activity. In a broad sense, the resource means as sources of matter and space - the environment of their location and life.Purpose. The purpose of the work is to highlight the importance of environmental safety management in mining complexes and areas for improvement.Methods. We used the methods of theoretical research to improve environmental safety in the mining complexes.Results. Based on theoretical research and improving environmental safety in mining complexes, the following measures are needed: control over the environment, reproduction and protection of its resources, improvement of natural living conditions, improvement of mining complexes as an environmental safety management system.Following environmental principles, it is necessary to manage the environment safety of mining complexes with the involvement of existing tools and methods of environmental analysis, as environment safety of this activity is of great importance for all areas of the environment. It is a question of studying of the zones of technogenic influence which are forming around dumps of mine breeds, and maintenance of physical, chemical stability of mining wastes. Management of ecological safety in mining areas will allow excluding the occurrence of the ecological-extreme situation after completion of the operation of coal deposits and during the future use of the disturbing territories. Stimulating self-education and ecological education, practical activity is at the same time a kind of generator in the process of developing beliefs in the main direction of the knowledge of conscious and responsible attitude to nature, ecological consciousness.Conclusion. Reasonable measures must regulate the impact of mining complexes on the environment. That means the monitoring of the state of the environment in mining areas; assessment of the threat of environmental hazards; prevention of complication of the ecological situation of the mining area (reclamation, phytomeliorative measures of heaps); development (implementation) of appropriate programs aimed at reducing environmental hazards.


2020 ◽  
Vol 177 ◽  
pp. 04001
Author(s):  
Alexandr Pashentsev ◽  
Anna Garmider ◽  
Anna Finogentova ◽  
Natalia Shakhova ◽  
Evgenia Statsenko

The essence of the concept of environmental safety of urban areas from the impact of boiler houses is justified on the basis of the synthesis of this definition of domestic scientists. A method for calculation of the indicator of environmental safety of urban areas based on the balance approach, which is based on the comparison of data on anthropogenic pressure exerted by boiler houses on the components of the environment and the ecological capacity of territories, was edveloped. Classification interval estimates of the ecological safety indicator of urban areas have been developed with a brief description, the economic essence of the ecological safety of these territories with a justification of relationship between the environmental, technical, and economic indicators has been proved.


Author(s):  
Svitlana LUTKOVSKA

This article discusses a methodological approach to the comparative assessment of the regions of the state in terms of environmental safety. A system of indicators characterizing the state of environmental safety in the regional dimension is proposed. It is proved that environmental risk assessment is considered the most promising approach to determining the degree of environmental hazard of the territory. The concept of such assessment in almost all countries of the world and international organizations is regarded as the main mechanism for the development and adoption of management decisions on environmental protection. In the analysis of the existing methodological developments it is established that the environmental hazard assessment is based on several basic approaches. The most commonly used are the indicator based on the system of selected indicators (or indicative method). It is established that the level of environmental safety is quite broad, since it requires consideration of all the components of this process: from the calculation of the level of environmental safety to the assessment of management decisions to overcome environmental risks and prevention. An integral indicator of the level of environmental safety of the regions is proposed, which is based on taking into account the degree of risk of occurrence of environmental losses. The toolkit of existing theoretical and methodological approaches to hazard identification was tested. It has been instrumentally demonstrated that the assessment of the level of environmental and natural-anthropogenic hazards is quite complex as it involves many aspects. Effective comparison of the regions of Ukraine with such a large amount of information is possible only in some socio-economic studies, because because of the variability of different indicators of the level of environmental load it is difficult to determine the impact of which is decisive. An appropriate system of indicators was developed when designing an instrumental framework for determining the level of environmental hazard. It includes indicators of socio-ecological and economic development of regions of Ukraine in dynamics, grouped by function. The system of aggregation of indicators of ecological safety of the region and information matrix of analysis of natural and anthropogenic safety of the region have been developed.


Author(s):  
L.Z. Khalishkhova ◽  
◽  
A. Kh. Temrokova ◽  
I.R. Guchapsheva ◽  
K.A. Bogаtyreva ◽  
...  

Ensuring the sustainable development of agroecosystems requires research into the justification of the impact of environmental factors on the formation of territorial agroecosystems and identifies ways to take them into account in order to justify management decisions and ensure environmental safety. The main goal of the research within the article is to identify the most significant environmental factors in predicting the formation of agroecosystems. Provisions are devoted to the study of the laws governing the functioning of agroecosystems in order to increase their stability. The methods of comparative analysis, generalization, abstraction, logical analysis are applied. A number of provisions are formulated regarding ways to account for the influence of factors on the formation of key elements of agroecosystems.


2019 ◽  
Vol 25 (6) ◽  
pp. 1466-1470 ◽  
Author(s):  
Rituparna Chatterjee ◽  
Subhajit Saha ◽  
Karamjyoti Panigrahi ◽  
Uttam Kumar Ghorai ◽  
Gopes Chandra Das ◽  
...  

AbstractIn this work, strongly blue emitting Ce3+-activated BaAl2O4 nanophosphors were successfully synthesized by a sol–gel technique. The crystal structure, morphology, and microstructure of the nanophosphors have been studied by X-ray powder diffraction, field emission scanning electron microscopy, and high-resolution transmission electron microscopy. The photoluminescence spectra show the impact of concentration variation of Ce3+ on the photoluminescence emission of the phosphor. These nanophosphors display intense blue emission peaking at 422 nm generated by the Ce3+ 5d → 4f transition under 350 nm excitation. Our results reveal that this nanophosphor has the capability to take part in the emergent domain of solid-state lighting and field-emission display devices.


2017 ◽  
Vol 52 (18) ◽  
pp. 2431-2442 ◽  
Author(s):  
Harun Sepet ◽  
Necmettin Tarakcioglu ◽  
RDK Misra

The main purpose of this work is to study how the morphology of nanofillers and dispersion and distribution level of inorganic nanofiller influence the impact behavior and fracture probability of inorganic filler filled industrial high-density polyethylene nanocomposites. For this study, nanoclay and nano-CaCO3 fillers–high-density polyethylene mixings (0, 1, 3, 5 wt.% high-density polyethylene) was prepared by melt-mixing method using a compounder system. The impact behavior was examined by charpy impact test, scanning electron microscopy, and probability theory and statistics. The level of the dispersion was characterized with scanning electron microscopy energy dispersive X-ray spectroscopy analysis. The results showed rather good dispersion of both of inorganic nanofiller, with a mixture of exfoliated and confined morphology. The results indicated that the impact strength of the industrial nanocomposite decreased with the increase of inorganic particulate content. The impact reliability of the industrial nanocomposites depends on the type of nanofillers and their dispersion and distribution in the matrix.


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