bluuebunny/crossref_metadata_2025_split huggingface dataset:
Influence of mining complexes on agricultural lands of the Ural Region
Authors: Konovalov V E , Pochechun V A , Semyachkov A I 
Published: November 2020

Abstract
The article is devoted to the influence of the mining complexes on the condition of the agricultural lands within the agricultural areas while developing mineral deposits in the Ural region. The work shows the distribution of the land resources in constituent territories of the Russian Federation that form the Ural region, in addition, agricultural areas are identified. The Ural mining region is defined as a place of deposits of solid minerals, the work shows its relationship with the agricultural areas of the constituent territories of the Russian Federation. The influence of the mining complex on quantitative and qualitative characteristics of the agricultural lands is determined, generalized sizes of the areas used for the premises of the mining complex are given. Geoecological assessment of the soil is performed. This soil is under intense technogenic burden due to the waste storage facilities - slag dumps of a metallurgical plant. Recommendations for agricultural land protection in the area of influence from the mining complex are given.
Classification of the sorbents capable of removing the petroleum products from Wastewater
Authors: Malyshkina E 
Published: November 2020

Abstract
Currently, an effective and relatively cheap sorption material for the extraction of various pollutants from water is being actively sought. It is still relevant the use of the sorbents made on a natural basis. Different material modifications, which make it possible to achieve the high values of their sorption capacity, are being studied. The new Classification of the sorbents used in the technologies for treating wastewater from the oil products, in this paper is presented. The all characteristics of the sorbents are considered in the work. An algorithm is formed that allows one to make an informed choice of the sorbent in terms of its effectiveness, environmental protection and material costs. As an example, the pine sawdust characteristics at the Classification is performed. Sawdust can be considered as an effective base of the sorbents, characterized by environmental safety, cheap raw materials and ease of use.
Analysis and technology to reduce the impact of tailings on the ecology of local water bodies
Authors: Brzhanov R T , Sofronova L I , Abramova S A 
Published: November 2020

Abstract
An integral part of the technological chain in the processing of uranium ores is a tailing dump designed for organizational disposal and long-term storage of tailings. There are up to 170 production and monitoring wells around the tailings for comprehensive monitoring of the impact of the tailings on groundwater. Wastewater is discharged from the industrial site into the Aksu riverbed after preliminary complex biological treatment at the sanitary treatment facilities. This article provides an analysis of pollutants from the processing of uranium ores. Studies have found that arsenic, molybdenum, uranium, and radium are the main pollutants that affect surface and groundwater. Under the influence of precipitation, the oxidation of ore minerals, many radioactive and chemical elements transform into more mobile forms and enter the environment. The main accumulator of radionuclides is bottom sediments. It is this component of the aquatic ecosystem that determines the mechanism and rate of redistribution of radionuclides. The analysis of water samples from the tailing dump itself and from surface water bodies in the area of the GMZ industrial site in the direction of thalwegs was carried out.
Development of technology for organic dyes removal from wastewaters
Authors: Sizykh M R , Batoeva A A 
Published: November 2020

Abstract
High efficiency of using a sorbent-coagulant, prepared on the basis of montmorillonite clay, for cleaning highly concentrated colored solutions is shown. In this case, clay plays the role of a surface that provokes the first stages of coagulation-sorption interaction, and promotes the formation of dense aggregated structures. For deep wastewater treatment, a galvanochemical method is proposed. It was experimentally proved that in this case a conjugated mechanism is realized that combines oxidative degradation of dyes and coagulation removal of reaction products. The technological scheme for local wastewater treatment of dyeing fur is proposed. Its high efficiency was confirmed by semi-industrial tests, while COD decreased by 98% and amounted to 15 mgO2/L.
Ecological differentiation of arable layers of leached chernozem and crop yields
Authors: Mantorova G.F. 
Published: November 2020

Abstract
The paper contains the materials of long-term research connected with studying the fertility inhomogeneity of the arable soil layer. The duration of cultivation, weather conditions, soil cultivation methods leave their imprint on the fertility of parts of the arable layer. It is revealed that effective fertility of the arable layer decreases from the top down, and the longer the nonmouldboard cultivation is used, the lower the fertility of lower layers. Plowing provides mixing of soil layers of the arable layer and creates a homogeneous layer by fertility, although the differentiation of the layers by their fertility exists even in case of plowing, but less pronounced. The maximum yield of spring wheat grain grown on the soil from different layers is observed in the variant from the 0-10 cm layer, and the minimum - in the variant from the 20-30 cm layer. Mixing of parts of the arable layer helps to smooth out and increase effective fertility of the root-inhabited soil. It is necessary to approach differentially when selecting a soil cultivation method and creating a fertile arable layer to obtain a high yield of cultivated plants.
Ecological problems of tillage
Authors: Mantorova G F 
Published: November 2020

Abstract
The main consequences of human economic activities include: soil erosion, pollution, exhaustion of soil, impoverishment of soil with mineral substances and dehumification. Anthropogenic impacts usually affect all components of the geosystem. As a result of erosion processes, the soil structure changes, its water-physical properties deteriorate; the use of heavy agricultural machinery on the fields contributes to the formation of a plowing shoe with an increased density, which prevents free infiltration of moisture in the soil; contamination of agricultural land leads to the accumulation of heavy metals (HM), radionuclides, benz(a)pyrene, industrial pollutants of organic and inorganic origin, soil pollution with transport and municipal waste. They penetrate in the soil in different ways. Not only soils but also plants growing on them are polluted, through which they enter the body of animals and humans causing various diseases.
Prospects for the using of alternative mercury-free sources of UV radiation in the processes of oxidative destruction of aqua-pollutants
Authors: Batoeva A A , Sizykh M R , Aseev D G 
Published: November 2020

Abstract
A comparative evaluation of the efficiency of using mercury-free radiation sources - KrCl excilamp (222 nm) and solar radiation to intensify the oxidative processes of pollutants with different chemical nature in ultraviolet-coupled ferrous (ferric)–peroxydisulfate systems was carried out. The oxidation ability of Fenton-like process for persistent target compounds of inorganic nature - on the example of thiocyanate ion, and bisphenol A (BPA) as the organic one, significantly improved under both UV and solar radiation. In this case, excilamps can be used as an independent or standby source of radiation (with low solar activity or adverse weather conditions), which in the future can be an important factor in ensuring reliability under the modular principle of constructing technological treatment schemes.
Reduction of airborne particulate matter emissions associated with petroleum coke production
Authors: Bulauka Y A , Liakhovich V A , Adamovich D N 
Published: November 2020

Abstract
This article presents the results of studies on production based on products of secondary oil refining processes of agents for dust suppression and reduction of losses from blowing out of wet bulk carbon-containing materials, in particular petroleum coke, as well as against freezing and adhesion during their transportation at low temperatures. The use of the developed dust suppression-antifreeze agent will reduce exposure to dust of the employees at the delayed coking unit in the course of petroleum coke production and improve its freeze resistance. It will have a positive impact on the solution of the problem of petroleum coke transportation at subzero temperatures, and will also allow expanding the range of marketable products, and increasing production efficiency.
Migration of antibiotics in natural aquatic environment
Authors: Abramova A A , Grakhova E V , Isakov V G 
Published: November 2020

Abstract
The article is devoted to the analysis of available information about the migration of antibiotics in natural aquatic environment. Realizing the mechanism of drug release into the environment and into the aquatic environment will further develop protective measures and mechanisms to prevent appearing of antibiotic resistance genes in the aquatic environment. For example, in Russia during 2015 - 2016 only, for medical purposes 915.65 tons of antibiotics were used. It should be noted that the main danger of antibiotics is that they do not completely collapse and do not lose their original properties after ingestion, but almost completely retain their biological activity. It leads to the fact that the active molecule of the active substance is released unchanged during physiological secretions or through the skin and is able influence the environment.
Solar energy efficient - AOP process for treatment of cyanide in mining effluents
Authors: Tsybikova B 
Published: November 2020

Abstract
Photochemical process using of UV component of natural sunlight (hybrid Solar method) in the presence of an oxidizing agent – persulfates was studied for destruction of cyanides in mining effluents. The kinetic regularities was studied for process of photooxidation of cyanides. Comparative destruction of cyanides experiments have shown that the efficiency of the destruction process in the selected oxidative systems changed in the following order: {Solar + PS} > {Solar} > {UV + PS} > {UV}. High treatment efficiency of cyanides using a hybrid system {Solar + PS} is due to high intensity of the UV-C component of the sunlight and the rate of generation of hydroxyl radicals OH and sulfate anion radicals SO4
-·, respectively. The results obtained indicate the high efficiency of the hybrid Solar-induced method for purification of cyanide-containing pollutants, which allows achieving complete destruction of toxic cyanides to non-toxic products.
Photooxidation based on UV/H2O2 process for arsenic removal from aqueous solutions
Authors: Tsybikova B 
Published: November 2020

Abstract
The main regularities of the photochemical oxidation of arsenic (III) were studied using a mercury-free UV source KrCl excilamp (222 nm). Comparative studies of the effectiveness of direct photolysis and combined oxidation of arsenic (III) in the presence of hydrogen peroxide were performed. It was found that the combined treatment of {UV / H2O2 } achieves a significant intensification of the oxidation process. The considered oxidizing systems according to the oxidation state of As (III) can be ranked according to {UV/H2O2 }>{H2O2 }>{UV}. The ion-radical mechanism of the photochemical oxidation of arsenic in the combined {UV / H2O2} oxidation system using the UV radiation of the KrCl excilamp is proposed. The fundamental possibility of using a mercury-free source of quasi-monochromatic radiation of the KrCl excilamp (222 nm) for the photochemical process based on the combined oxidation system {UV / H2O2} to remove arsenic from aqueous solutions is established.
Removal of Congo Red Dye from aqueous solutions using natural clay of montmorillonite type
Authors: Badmaeva S V 
Published: November 2020

Abstract
Natural clay of the montmorillonite type, heated at different temperatures, was studied in removal of the Congo Red anionic dye, which is a component of the wastewater of the dyeing industry by the adsorption method. It was shown that with an increase in the calcination temperature of the clay the specific surface, pore diameter and pore volume decreased. The calcination temperature also affected the adsorption properties of clay. It has been established that the largest sorption capacity with respect to the Congo Red dye is possessed by a sample heated at 104 °C. Sorption isotherms were analyzed using linear Langmuir and Freindlich equations. It was determined that the adsorption of the dye on natural clay was in good agreement with the Langmuir adsorption isotherm with a correlation coefficient of 0.9751-0.9966, which corresponded to monolayer adsorption on a uniform surface.
The analysis of flotation whey treatment
Authors: Evseev E P , Zhuravleva I V , Isaenko D M 
Published: November 2020

Abstract
The empirical analysis of the scheme of whey treatment was carried out. Controlled parameters for the further investigations and assessment criteria of effectiveness of whey treatment have been singled out: the best conditions for protein coagulation, intensity of flocculation, the choice of the facility capable of effective working with high temperature of waste water and flocculant application contributing to formation of the larger flakes and process intensity. Real-time experiment on dairy enterprise LLC “SCHUCHINSKY CHEESE MANUFACTURE” was carried out. The following equipment was applied in the experiment: electroflotator, screw dehydrator, pump assemblies, containers for preparation of reagents and whey heating, measuring equipment: pH-meter, flowmeter, thermometer, photometric analyzer of chemical oxygen consumption (COC), scales. In the process of the experiment on the plants we determined the data of COC, pH and mass of emitting protein depending on the type of the flocculants used: superfloc A-130 and praestol 2530. The results of the experiment with whey treatment with COC equal to more than 10000 mg/l revealed high effectiveness of high charge anionic flocculants. New innovative technology of separate whey treatment in the technological process of dairy factories without its discharge to waste water is presented.
Substantiation of the permissible value of odor from sewerage system facilities
Authors: Ruchkinova O I , Karelina K A 
Published: November 2020

Abstract
With the growth of urbanization in large cities, the number of complaints from the population on unpleasant odors emitted by sewerage system facilities increases. In most cases, instrumental measurements on the content of individual malodorous substances in the zone of influence of sewerage facilities do not confirm the exceeding of the atmospheric air quality standards, even in terms of unpleasant odor. The lack of a clear system for standardizing odor in the atmospheric air and of established odor standards in Russia determined the relevance of this study. The aim of the study is to substantiate the permissible value of the odor emitted by sewerage system facilities. The article describes the research methodology. The results of field studies on the content of pollutants in the atmospheric air and the concentration of odor at the border of the sanitary protection zone of sewerage facilities are presented. The criteria for odor evaluation are proposed. The permissible value of odor for sewerage facilities is substantiated.
Features of overall and occupational morbidity rates among mine workers of marble and granite quarries of the Irkutsk Region
Authors: Aleksandrova A Yu , Timofeeva S S 
Published: November 2020

Abstract
In connection with the active development of the mining sector of the economy, there is an important task of labor rate setting of mine workers and reliable records of occupational morbidity rate associated with dust emissions. The review is based on the scientific literature on occupational lung diseases in the mining industry that focuses on the recording and identification of occupational diseases associated with the silica dust (SiO2) exposure. The article addresses both “traditional” and “emerging” concerns regarding occupational diseases of the respiratory system in mine workers, incorporating the data on evidence-based practices of practitioners in developed and developing countries. The data is devoted to deciphering the types of occupational diseases that are given the least attention, which results in the fact that many workers put themselves at risk due to a lack of knowledge about the consequences of inhaling stone dust while performing their duties. The SiO2 dust resulted from the quarrying of marble and granite is underestimated. Its contribution to the development of occupational diseases of mine workers is significant and requires focused attention and an integrated approach to the prevention and control of occupational lung diseases associated with mining. The study has been carried out with the financial support of the Russian Foundation for Basic Research within the framework of scientific project No. 19-31-27001.
Wastewater treatment technology with modified sorbent from the complex of household services
Authors: Arkanova I A , Mochinskiy M V 
Published: November 2020

Abstract
The composition and characteristics of wastewater from the complex of household services and the method of wastewater treatment from the surfactants have been studied. To increase the efficiency of local treatment of the wastewater, a method of neutralization on a carbon sorbent modified with sulfuric acid has been analyzed. Wastewater treatment technology with a high content of organic substances having an increased alkaline reaction is a pretreatment of coal with sulfuric acid solutions, which then serves as a resin charge for filters. The spent resin charge is regenerated with a hydrogen peroxide solution. These results have been obtained using artificially prepared and natural wastewater from the complex of household services and form the basis for the development of wastewater treatment facilities for laundries located in hotels, health centers and recreation facilities. The conclusions on the efficient use of the proposed method are made.
Validation of a simplified model for liquid propellant rocket engine combustion chamber design
Authors: Hegazy M , Belal H , Makled A , Al-Sanabawy M A 
Published: November 2020

Abstract
The combustion phenomena inside the thrust chamber of the liquid propellant rocket engine are very complicated because of different paths for elementary processes. In this paper, the characteristic length (L*) approach for the combustion chamber design will be discussed compared to the effective length (Leff) approach. First, both methods are introduced then applied for real LPRE. The effective length methodology is introduced starting from the basic model until developing the empirical equations that may be used in the design process. The classical procedure of L* was found to over-estimate the required cylindrical length in addition to the inherent shortcoming of not giving insight where to move to enhance the design. The effective length procedure was found to be accurate within ± 10%.
Simplified algorithm for determining injection duration to achieve fast response in SI engines
Authors: Shawky Omar 
Published: November 2020

Abstract
For modern SI engines, the injection duration and its timing are one of the most important parameters which influence the mixture homogeneity, emissions, combustion efficiency, and engine response. In the present work, a simplified port fuel injection system with its driver algorithms was designed to control the injection duration and its timing. The Calibrated Dose method is used in this system instead of the stream mixing method. Therefore, the injected fuel mass is accurately computed according to the engine load, engine speed, engine operating condition, and the amount of air drawn into the engine. The system consists of a conventional port fuel injection system equipped with a micro-controller, a Throttle Position Sensor (TPS), a couple of Hall Effect Sensors (HES), load cell with its driver module, injector controller circuit, and a custom-made inlet port. The micro-controller is used to calculate the injection duration each engine cycle according to engine speed, amount of air drawn per cycle and engine load. The two HES are used to detect the injection timing and measure the engine speed. The TPS is used to monitor the throttle position angle so it can calculate the amount of air drawn into the engine at that time with respect to engine speed. The load cell and its driver module are used to measure the engine torque and consequently the brake power. The injector controller circuit is used to initiate the injection process at the perfect timing for the accurate duration.
Development of rotary heat exchanger model to investigate performance with integrating controller
Authors: Ghoneim A M , Aly M H , Mahmoud O E 
Published: November 2020

Abstract
The heat wheel Considers one of the best heat recovery devices with very high effectiveness, which leads to great savings in energy and operating expenses. This research study a novel dynamic model of a rotary heat exchanger automatically control the temperature of outlet air despite the operating conditions are changed. The model is implemented under MATLAB/SIMULINK environment to investigate the performance of the heat wheel considering the air properties changing during the operation. The transient effect of air-flow rate, inlet air temperature and wheel rotational speed on the output temperature and effectiveness are discussed. The optimum rotational speed of a heat wheel was investigated for different operating conditions. The temperature distribution of air and matrix for one Full cycle of heat wheel were investigated. The model was validated based on data found in previously published experimental work. Results reveal that the effectiveness of the device is inversely proportional to the amount of flow, while it is directly proportional to the rotational wheel speed. The effectiveness is slightly affected by the inlet air temperature.
Handling performance of an 8x8 combat vehicle
Authors: Ahmed M , El-Gindy M , Lang H 
Published: November 2020

Abstract
In this research paper, the handling stability of an 8x8 combat vehicle will be assessed using two different control systems. The first technique utilizes a Torque Vectoring Controller (TVC) to control the vehicle yaw rate to meet the desired value. The second technique utilizes an Active Rear-axles Steering (ARS) to minimize the vehicle sideslip. TVC will be designed as a Single Input Single Output (SISO) control problem using a Sliding Mode Control (SMC) technique, while an Optimal Linear Quadratic Regulator (LQR) will be utilized to develop the ARS controller. The two controllers will be evaluated against a conventional vehicle with fixed rear axles. TruckSim software is used in corporation with Matlab/Simulink to implement and assess the controllers using Double Lane Change (DLC) over high and low coefficient of friction road surfaces at various speeds. The results give an insight into the driving conditions at which each controller is utilized and introduce a novel method to coordinate the integration between both controllers for integrated chassis applications.