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The presence of nitrate concentration in drinking water can cause high toxicity to the human body, being considered among the most important pollutant in the environment. Among the many methods available such as biological treatment, electrodialysis, reverse osmosis, adsorption, ion exchange, adsorption is the most used technique due to its low cost and simplistic design. Therefore, the aim of this paper was to study the retention of nitrate anion from high concentration aqueous solutions on a novel magnetic adsor...

This study investigated changes in carbon (C) and nitrogen (N) concentrations in the three components of the forest ecosystem (leaves, bark and soil) along an altitudinal gradient in the temperate forests of Romania. The properties and processes within the forest ecosystem are influenced by altitude. The leaves, litter and soil are important in the good development of the ecosystem and in the cycle of the elements. Plants extract the nutrients necessary for life and growth from the soil in which they carry out the...

The theoretical model of perfect business competition is designed based on five assumptions: atomicity of demand and supply, homogeneity of the product, free entry/exit in/from a branch of activity or on/from the market, market transparency, (with the fundamental assumption of the individual's rationality) and perfect mobility of production factors [1], [2]. The factorial analysis carried out for an economic agent from an Eastern European country highlighted the fact that the production function is homogeneous. Fo...

Water pollution with oil residues is a particularly important and difficult problem to prevent and solve. The ecological consequences of black tides have proven to be particularly serious and even catastrophic for marine ecosystems. In this sense, the limitation and concentration represent the optimal response action to hydrocarbon pollution. The aim of the work was to digitally design a woven textile reinforcement used as a matrix of the composite material from which the freeboard and skirt of the floating surfac...

Because the occupational risk expressed the possibility of ending up in a (possible) danger of injury and/or occupational illness, it can represent a criterion of qualitative appreciation of the accomplishment of a human action, indicating how it may produce undesirable effects, materialized by human and material damage. The risk associated with a human action is determined by a multitude of risk factors, both of internal nature (manifested by human error) and of an external nature (technical equipment and related...

Traditional building materials based on primary natural resources can be used for green housing concepts with energy eco-efficiency and the health of the living space, representing a special group of innovative materials for the construction industry. They are developed by using and improving the local, traditional technologies and concepts applied on basic, natural raw materials (clay and sand, wood, straw, wool, etc.), for the general purpose of creating the living space in a sustainable, environmentally friendl...

The levels of specific activity of 90Sr and 137Cs in fish of one of the most polluted reservoirs of the Chornobyl Exclusion Zone (ChEZ) - Vershyna Lake. During the research period from 2011 to 2021 for all studied fish of the lake. The peak ranges of the specific activity of radionuclides are noted at the level of 32960-213300 (average value 67832-22936) Bq/kg for 90Sr and 838-25907 (4811-569) Bq/kg for 137Cs. It is shown that at the current stage, the specific activity of 90Sr in the ichthyofauna of the lake exce...

Fish oils with a high content of polyunsaturated fatty acids (PUFAs) are gaining increasing interest in the food and nutraceutical industry, due to their important functional properties for human beings- health improvement. The most important PUFAs have at least two double bonds placed on the carbon chain. These include ?-linolenic acid (ALA), eicosapentaenoic acid (EPA) and docosahaxaneoic acid (DHA). Microencapsulation is a technique used to protect the bioactive compounds from oxidative damage, to ensure their ...

Teichi bog is largest intact moss bog in the Baltics states. The article considers the hydrological exchange process of the bog and surrounding areas. It plays an important role in the ecosystem, as well as a factor in stabilizing the water level, as bog peat in its natural state contains 88%-97% water. It belongs to raised bogs, since its upper layer is located above the surrounding relief. Replenishment of water resources in the Teichi Nature Reserve occurs mainly due to precipitation. In turn, the bog with surf...

Currently, the most common way of transporting medical products, such as blood, blood products, vaccines, and medicines, is air and land transport. Using helicopters and cars to transport the needed products is expensive and generate relatively high air and noise pollution compared to the drone delivery. This article considers the problem of air pollution occurring during standard aerial and car transport of medical products, with particular emphasis on solution used in African countries. The article presents the ...

Sinorhizobium meliloti are agriculturally valuable species of soil bacteria that form nitrogen-fixing symbiosis with alfalfa plants. Global climate changes lead to an increase of agricultural areas subjected to salinity. Current knowledge about about high-salt stress impact on soil saprophitic root nodulated microsymbionts of legumes is weakly studied and rhizobia gene pool responsible for salt tolerance are fragment and far from clear. An increase of bacteria nonspecific resistance (immune status) to unfavorable ...

The safety of navigation and life in the risk areas adjacent to the coastal area, represent the central objective of the paper and meet the provisions of the European directive "in force." In this context, for defining the geometry of the autonomous modular system used as physical system for marking the fairway, mathematical prediction models were developed. The prediction of phenomena and functional characteristics for autonomous modular system was possible by using a specialized software, where the calculation c...

Housing and sustainable living are two main preoccupations for architects onward with tracking the purpose of housing to meet people-s need of shelter and the purpose for healthy lifestyle. Achieving the first purpose considers the impact scale on the natural environment and on the social and community dimensions. The second purpose views the relation to nature through building techniques and materials, spaces, and the living context. Saxon settlements from Transylvania are analyzed to identify the model of living...

Meat and bone meal (MBM) is considered animal waste and can no longer be used in agriculture since the onset of the disease called spongiform encephalopathy in cattle. This waste is burned and then dumped in landfills, which causes unwanted emissions to the environment. This is a real problem nowadays and we must find environmentally friendly solutions must be identified to eliminate this waste by energy recovery. For these reasons, a lot of processes have been developed to recovery the MBM, which are environmenta...

The main role of ventilation systems and especially air conditioning systems is to create indoor conditions and air quality inside the rooms that are independent of external atmospheric influences. The sizing of ventilation systems and especially of air conditioning systems is done, in most cases, by considering the climatic elements as a basis for calculation. The real limit to air quality insurance it consists in maintaining in the air certain concentrations of harmful substances which do not endanger human heal...