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Flood events, as well as the channel and floodplain landforms are crucial for the transport and spatial distribution of heavy metals and metalloids in soils in the river valleys. The paper outlines the results of obtained preliminary indications about the flood proneness of two study areas located in the valleys of Ogosta River near the village of Gorna Kovachitsa and Lom River near the village of Vasilovtsi (NW Bulgaria) based on hydro-geomorphological indices. The detection of flood-prone areas has been done usi...

Catalytic activity of commercial ruthenium catalyst (ruthenium (5%) supported on alumina (Ru5%Al2O3)) on renewable hydrocarbon production from stearic and oleic acid via hydrotreatment was investigated. Moreover, the effect of Ru5%/Al2O3 on aromatic (ethylbenzene) and saturated cyclic hydrocarbon (cyclohexane) structure modification under the same reaction conditions was determined. Full conversion of fatty acid feedstock into pure hydrocarbons were achieved over ruthenium catalyst. Linear alkanes (n-pentane to n-...

Droughts are a natural phenomenon with a fairly high frequency worldwide. Their evolution generates, through the water deficit, a state of vulnerability at the level of natural and social components. In areas dependent on groundwater resources this vulnerability is transformed in a high social and economic risk. In this situation can be included the eastern part of Romania where over 50% of the population, predominantly in rural areas, is supplied with groundwater. In order to highlight the negative effects of a n...

The researches were carried out in a catchment with a pronounced torrential character and flood risk (Slanic catchment) located in the Siret catchment, Romania. Precipitation data were available from the monitoring network of the Siret Water Basin Administration, from 2019 and 2020; given their continuity they were considered suitable to allow hydrological modeling. A hydrological modeling was followed, that simulates the rain-drainage processes of the water systems, given that in the studied catchment there are a...

The increasing world population demand for bioeconomy products intensify the nitrogen cycle and encourage eutrophication in water bodies. Global climate change and land use transformation have a significant impact on the hydrological cycle. Integrated water management in the catchment area is a sustainable solution for catchment area development and balancing economic and environmental interests. The aim of this study is to develop an optimization model for sustainable lake management. The case study is done in eu...

The article is dedicated to the study of hydrometeorological parameters on a stationary oceanographic platform in the Black Sea. The research paper contains the description developed in the Marine Hydrophysical Institute’s complex for measuring meteorological parameters (wave height, wind speed and direction, free-air and sea temperature, barometric pressure, relative humidity). The measurements were carried out on a stationary oceanographic platform located in the coastal zone of the southern coast of Crimea at a...

In the investigation of gas explosion events resulting from combustible gas leakage, often the formation of the explosive atmosphere at the location of the ignition source is less highlighted, usually being calculated the concentration of combustible gases at the entire volume affected by the explosion; depending on the distance between the gas source and the ignition, the complexity of the geometry (volumes occupied by various solid bodies) and the air currents in that volume (convective currents generated by hea...

The immobilization of glucose oxidase (GOx, enzyme of oxidoreductases class) was carried out on non-magnetic (SiO2, Al2O3) and magnetic mesoporous oxides (Fe3O4-SiO2, Fe3O4-Al2O3). Magnetic supports were synthesized by in-situ crystallization of magnetite nanoparticles in mesopores. The surface of the support was preliminarily modified with amino groups and the glutaraldehyde was used as a linker for covalent binding of the enzyme. The supports and biocatalysts were fully characterized using a combination of physi...

At present, surface runoff represents serious environmental problems in the urban environment, causing adverse effects on socio-economic and natural systems. Surface runoff is a complex source. The creation of surface runoff is described by various hydraulic hydrological processes, from the impact of water on the surface to the mouth into the sewer network or recipient. The formation of the precipitation-runoff process depends on several factors. Land-use change is a key factor that significantly affects the quali...

In this study SURFEX land surface model is used coupled to RAPID river routing model in order to investigate the influence of alternative ground and rooting depth, soil texture and land cover maps on the ability of the coupled system to adequately simulate the river flow in Upper Arda River basin in Bulgaria. This was done by comparing the statistical scores of computed from the model data series against measured streamflow discharge series: that is scores of simulations using former soil texture maps from Harmoni...

Due to land use practices, there is a change in the environmental landscape in Haridwardistrict which has a great impact on its weather which in further also impacts vegetation.Vegetation Indices are considered as indicator for temporal variation of vegetation sofor better consideration of this dynamics, relation between vegetation and climateshould be studied more extensively. This study evaluates the annual dynamics undervegetation cover and its impact on climatic factor. It is carried out by establishing therel...

The article analyzes the effect of the radioactivity of some crude oil components on the environment in the Moine?ti geological area. The analysis of the equivalent dose flow measurements shows the influence of contaminated equipment, in the areas adjacent to them, where when measuring the soil were obtained values of dose flow between 0.2 - 3.0 ?Sv/h, both at a height of 10 cm from of soil, as well as at a height of 100 cm from the ground, with a maximum of 3.5 ?Sv/h. By interpreting the results of the determinat...

The formation of a groundwater aquifer in a unique territory disturbed by the quarrying of a phosphorite deposit in the southwest of the Leningrad region, built up with industrial facilities for ore processing, auxiliary production, and waste storage is considered. During the quarrying of the phosphorite layer, the hydrogeological section was disturbed, the filtration and capacitive properties of the soils of the aeration zone and water-bearing rocks changed. In the zone of active quarries, during dewatering, the ...

The paper deals with numerical analysis of the stability of an embankment reinforced using a geogrid. The analysis is mainly focused on the impact of the Rinter parameter, which represents the ratio of the soil-geogrid interface shear strength to the shear strength of the soil, on the deformations, and the global stability of the embankment. The properties of the soil-geogrid interface were measured using a modified large size direct shear test apparatus. The biaxial geogrid made of polypropylene with a tensile st...

Regions with scarce freshwater resources, such as North Africa and the Middle East, face significant challenges today and will face even greater challenges in the future as a result of socioeconomic and climatic changes. The Missour Oases in Morocco is one of many arid Moroccan Ocases grappling with increasing water scarcity, which threatens self-sufficiency in agriculture. Efficient water management is required to sustain people's livelihoods. The main aim of this study is to assess the impact of human activities...

COVID-19 has imposed shocks on all segments of food supply chains, simultaneously affecting farm production, food processing, transport and logistics and final demand. It is therefore important to assess the risks, the probability of their occurrence and their impacts in order to develop risk mitigation recommendations. In Latvia, poultry farming as an agricultural industry has centuries-old traditions. Poultry in Latvia are produced both on large poultry farms and on small and backyard farms. There are 21 large a...

Putna-Vrancea Natural Park covers an area of about 30204 ha, being declared Natural Park in 2004, by the Romanian Government Decision no. 2151/2004. Putna-Vrancea Natural Park is located in the Curvature Carpathians and includes one of the wildest mountain areas in Romania, shelters many species of flora and fauna of national and international importance such as: Canis lupus, Ursus arctos, Lynx lynx, Rupicapra rupicapra, Cypripedium calceolus, Taxus baccata, Leontopodium alpinum. etc. The present study highlights ...

Magnesia based cement is known for over 150 years. Compared to Portland cement (PC), magnesium potassium cement (MPC) is more environmentally friendly material, because of its high carbonation capability and a lower environmental impact on the overall ecosystem quality and resources than PC. Fast setting connected with high early strength leads to the satisfying parameters achieved after a few hours. Therefore, MPC finds use as the concrete repair material for buildings, roads or concreting runways, etc. In the pr...

Greenhouse heating during cold seasons is costly as it is high energy consuming. The use of latent heat stored during sunny periods for greenhouse heating could be an interesting alternative in several regions worldwide as in Tunisia. Thus, new agronomic/climatic approaches were developed to produce several crops such as tomato in a sustainable way. In this context, maturity and yield of tomatoes cultivated inside a greenhouse equipped with a new solar air collector with latent storage (IGHLS) were studied in comp...

Arkhangelsk Oblast is a region of The Russian Federation with the most developed forest industry. Here, it used advanced timber harvesting and sawmilling technologies. Arkhangelsk Oblast has a large territory. The area of the region is 330103 km2. The population density is low and amounts approx. 1.91 people per square kilometer. At the same time, about 80% is the urban population. The remaining 20% of the population lives in areas remote from the regional center. Due to a number of circumstances, the infrastructu...

Detection of nickel ions in various foods, especially fruits, is very important for the prophylaxis of patients with allergic contact dermatitis to this heavy metal. Currently, there are a limited number of rapid methods for identifying nickel ions, so it is necessary to develop new biosensors in this area, by improving selectivity of ligands and utilization of immobilization elements suitable for nickel ions. The mentioned elements are very important because they can increase the selectivity, sensitivity and can ...

The purpose of this report is to encompass and analyze the advantages of the creation, the implementation and transformation of software product in the production and processing of products. Several main conclusions have been made in the scientific report, with the general conclusion being that based on the computer program developed and implemented in practice, an easier method of work is ensured, while considering the specific pre-production and production processes, as well as processing operations in productio...

To reveal the effect of coal mining on the content of trace elements in the environment and human bio-substrates in the Republic of Sakha (Yakutia). The representative sample consisted of 90 children, aged 7 to 17, who have been permanently residing in the coal mining region since their birth. The study of the content of 11 microelements in human hair was done by mass spectrometry. Of the huge variety of the mineral resource base of Neryungri, only deposits of coal, gold, underground and mineral waters are now inv...

The emission of fluorine compounds by industrial plants that process phosphorites and apatites and the spread of their wastes become one of the main sources of formation of a persistent technogenic anomaly nearby Taraz (Zhambyl) town in Kazakhstan. Ecological-geochemical monitoring of the content of this element in the environmental objects is an essential measure because of the severity of consequences caused by hyperfluorosis. The study aimed to evaluate the levels of fluorine in the water, soil, and plants. Loc...

One of the tasks defined in the basic principles of sustainable building construction is to ensure a quality indoor environment and the health and wellbeing of the building’s users. Especially in the current epidemiological period, people spend more than 90% of their time indoors. In almost every indoor environment (IE), there is a certain number of ornamental houseplants. In most cases, these are ornamental plants with leaves or flowers. These plants give us aesthetic impressions and improve the well-being of bui...

In 2015-2020 the content of heavy metals and metalloids in the river bottom sediments in Kaliningrad region was studied. Definition of arsenic, lead, zinc, copper, and vanadium, iron, manganese, titanium, aluminum was carried out in water samples and in the samples of bottom and floodplain sediments in the watercourses, flowing into the Curonian Lagoon, in the Baltic Sea and in Kaliningradsky (Vistula) Lagoon, as well as in the watercourses of the southern part of the Kaliningrad region. The composition and patter...

In this paper, the authors conducted information analysis of activities of Nobel brothers in the Tambov Region of Russia in order to discover and reconstruct associated memorable places. An important aspect of analysis is identification and detailing of objects suitable for virtual modeling and applying 3D modeling technologies for cultural heritage objects using an open source software platform OpenSimulator. It can be argued that in modern cultural environment there are favorable conditions for the use of virtua...

Historical ore exploitations generated mining waste with useful metal content, near Baia Mare, Romania. Central Flotation Pond (CFP) represents a secondary resource, but also a risk factor of pollution for the environment: groundwater, surface water, soil, air. CFP was inventoried by the Permanent Secretariat of the International Commission for the Protection of Danube River (ICPDR) as high risks spot in Romania with immediate effects on Somes-Tisa sub-basin, due to the content of dangerous substances: cyanide, he...

The relevance of preserving the biosphere’s sustainable state determines the need to restore natural ecosystems. The Mining Institute KSC RAS has substantiated the methodology and developed a technology to restore natural ecosystems disturbed during the development of georesources, in accordance with the principle of their self-organization. The increase of the energy potential of the system-forming function of biota results in a much faster remediation of natural ecosystems, compare to self-growing. The permanent...

The field of Earth Sciences has always been at the border between fundamental and applied research. If the fundamental part remains the complexity and unpredictability of research on Earth and natural phenomena, development and applied innovation are anchored in society and give a norm of the impact of research for society. The SETTING project aims to coordinate a distributed infrastructure that owns and can provide data, products and services (DPS) relevant to the field of Earth Sciences, to a wide and diverse co...

The paper considers the methodology and algorithms for integrating geotechnical control methods in assessing the stability of natural and technical objects. In the process of creating data processing algorithms for control systems of natural and technical objects, it is necessary to be based on the purpose and system methodology of the control itself. The purpose of the control is to assess the current state of the object based on the measured geotechnical data and to forecast the development of possible destructi...

Today, a large number of investors base their forecasts, and subsequently make investment decisions, by combining financial and non-financial information. If, until recently, financial data and indicators calculated on their bases were not sufficient for justifying investment decisions, nowadays the situation is rather different. Non-financial information, as a totality of data about environmental, managerial, and social productivity, has a key significance in the assessment of investment projects. The role of thi...

Today, elimination of active pharmaceutical ingredients from environmental waters and wastewaters is becoming an increasingly topical issue. This paper describes a flow-though technology for wastewater treatment, with tetracycline used as an example of a contaminant. A standard scheme for wastewater treatment to eliminate the mentioned compound consisted in advanced oxygen processes based on ozone treatment, fenton process, sonochemical reactions and UV treatment. Currently, photocatalysis is considered the most p...

The fact of interaction of calcium silicate with the key elements present in the spent nuclear fuel is established. Nanopowders of synthetic calcium silicate with a given particle size 10, 2 and 0.6 microns were obtained. It was found experimentally that a decrease in the particle size of the calcium silicate powder contributes to an increase in its sorption properties (distribution coefficients and static exchange capacity). If for uranium static exchange capacity in the considered range of powder particle sizes ...

An important practical task in the study of any measuring devices and systems is to assess their sensitivity. Such systems include, in particular, hardware and software systems for geodynamic monitoring of geological environments for leaks of petroleum products (from areal storage and processing facilities), implemented on the basis of the phase-based method of geoelectric control. The idea of this method is based on the fact that various petroleum products have their own unique electrical characteristics, contras...

In this paper is presented a study conducted to verify the possibility of using a prototype of fluid energy mill, based on the opposing jets principle, for the reduction to ultrafine size of a beneficiated coal, intended for energy production. The original counterflow jet mill used operate in closed circuit with a cyclone type separating chamber, producing fine powders with a definite top size. Many processing plants routinely use jet mills in the final stages of mineral treatment for the production of high qualit...

The most important result of the effect of interparticle interactions of ferromagnetic particles in suspensions is the formation of aggregates and modification of their physical properties, which allows changing the kinetics of separation processes. The interest of the authors to this problem is dictated by both its theoretical content and purely applied aspects within mineral processing. Based on the block-structural approach to technological equipment modeling within the framework of the ideal mixing model, a ma...

The present research (landscape, landscape-historical and landscape-ecological) was carried out to determine the landscape-ecological potential of Moscow for the purpose of territorial planning and with a view to developing proposals for the balanced and effective urban development, for ensuring the comfort of living for the city’s population, and protection of the environment and objects of cultural heritage. The research included: a detailed analysis of the natural, cultural and historical features, an assessmen...

The story of the evolving development of urban-landscape theory, planning, and design is like the evolving perceptions and advancing knowledge in mathematics, anthropology, geography, and ecology. In the mid-90s, the theory of landscape urbanism appeared in the West, according to which the structure of cities is determined by landscape factors more than architecture. Landscape urbanism describes "the ability to produce urban planning effects traditionally achieved through the construction of buildings, simply thro...

In this paper we present the frequency ratio method, a commonly used technique for designing a landslide risk map for the Muscel catchment area, based on the quantitative association between the landslides inventory and their causative factors. The river basin of the Muscel stream is located on the right bank of the Dambovita river, in the north of the region with the same name and due to geological and geomorphological conditions, but also due to anthropogenic activity, it was and still is affected by landslides....

The paper presents an LCA analysis of biomaterials with particular emphasis onpolylactic acid (PLA), as it is recognized as one of the most popular bioplastics on themarket. The results show that there are several factors to consider when selecting thebest decommissioning option for this type of material in line with the newly introducedcircular economy concept, which is the most desirable way to manage waste. A lifecycle assessment was carried out to assess the environmental impact of two wastemanagement pathways...

As a response for water losses in urban water supply networks, the pressure management has become now, one of the most effective method in order to reduce the leakage part of non-revenue water (NRW). The implementation of pressure management has as main objectives besides reducing leakage, reducing bursts frequency and extending the life of the infrastructure. Therefore, in order to improve the water distribution systems, this paper presents the advantages of pressure control and optimization for water distributio...

Soils of flat watersheds under shelterbelts and on adjacent arable lands on three areas with different climatic conditions were studied. The study area is a forest-steppe of the central part of the East European Plain (Belgorod oblast, Russia). In all areas chernozems with 60-80 cm dark-grey (reached by organic matter) part of profile (A1 + A1B), are developed. The parent materials are loess-like loams and clays. The width of all shelterbelts is 30 meters; they are oriented from south to north; the age of the shel...

Records of the magnetic variations are different at every observatory. They depend mainly on the latitude of the observatory and the local time. To give a quantitative measure of the amount of magnetic disturbance at any time, we need to rely on magnetic indices. Usually, local K-index is preferred as indicator of the geomagnetic activity in a specific area. Each observatory assigns a digit ranging from 0 to 9 to both H and D, for every three-hour interval starting at midnight, universal time (UT). Recently, in De...

The study of the dynamic behavior of the Earth’s magnetic field and its interaction with the Solar wind is an important for better understanding of the processes in the magnetosphere and on the surface of the Earth’s ground. This dynamic system is created due to solar-terrestrial interactions. The effects on the variations of the magnetic field induced by geomagnetic storms are strongly dependent on the local time and the latitude. Our goal is to study of the spectral characteristics of the ULF geomagnetic field v...

One of the most important sources of ambient air pollution in the urban area is traffic, which generates two inorganic pollutants with severe effects on human health, namely nitrogen dioxide (NO2) and ozone (O3). The lockdown imposed in the context of COVID-19 pandemic dramatically decreased the level of traffic. In this respect, the paper aims to evaluate the impact of the COVID-19 lockdown on ambient air quality, by monitoring NO2 and O3 concentrations within the INCERC Bucharest Branch, part of NIRD URBAN-INCER...

The article describes the LoRaWAN network. LoRaWAN is a communication protocol that provides long-distance communication with low power consumption. Long Range Wide Area Networks (LoRaWAN) is open-center access (MAC) layer technology designed for long-distance connections with a large number of low-energy devices. LoRaWAN devices in various network settings use the most modern network simulator (NS-3). First, one device and its mobility are introduced. Due to its properties, the protocol is very popular in the fie...

Porous supports including oxides and polymers have been employed for enzyme immobilization for many years. In recent times, the research focus has been placed on hierarchical structures, dependencies on pore sizes, and the use of magnetic porous oxides for magnetic recovery. The presence of pores or cavities where enzymes could locate to create an optimal degree of crowding achieved in cells is not a prerequisite, but it could significantly enhance the catalytic activity of biocatalysts. For the last five years, t...

Solutions to the environmental problems associated with the burning of coal in power plants are in poor condition. One of the main problems is the continuous growth and accumulation of ash and slag waste (ASW). Ash and slag waste is a major source of raw materials for various industries. However, the degree of use of ash and slag waste at Russian thermal power plants does not exceed 2 million tons / year, with an annual output of 25-28 million tons. Modern methods of enrichment and processing allow the use of ash ...

Cement concrete pavements are very specific group of the road construction due to the different traffic loads and vary time difficulties in the course of maintenance and repairs. For the design of the planed repairs the increased requirements are imposed especially in the terms of repair life time cycle. The economical evaluation shall consider not only the value of the repair itself but also the cost connected with the diversion of air traffic during the execution of the maintenance and repairs. Therefore, is hig...