GEOLINKS Conference Proceedings最新文献

{"title":"REDUCTION OF THE VOLUME OF PUMPING OF LIQUID WASTE FROM THE PRODUCTION OF APATITE CONCENTRATE DUE TO THE TECHNOLOGY OF PARTIALLY CLOSED WATER CIRCULATION","authors":"A. Artemev, V. Biryukov","doi":"10.32008/geolinks2021/b1/v3/51","DOIUrl":"https://doi.org/10.32008/geolinks2021/b1/v3/51","url":null,"abstract":"\"The use of recycled water supply technology in mineral dressing plants solves current environmental and economic problems for the mining and processing industry. Usually, water treatment takes a long time and requires constructing large-volume tailing dumps. The paper proposes a technology of a partially closed water circulation with the purification of watered production waste from suspended particles and water-soluble impurities that negatively affect the flotation process, based on the regularities describing the interaction of flocculants with the phases of a heterogeneous system of process waters. The authors have determined the most effective reagents providing optimal indicators of recycled water. The proposed technology is implemented in hardware in a radial thickener and eliminates the discharge of process water into an external tailings dumps facility, which will reduce the area occupied by production waste. Based on the particle size distribution data for various preliminary treatment options, differential and integral particle size distribution curves have been obtained. Analytical expressions of the obtained curves have been used to create discrete functions of volume fractions of particles with different sizes when constructing a model of the initial feed. The hydrodynamic processes of highly diluted suspension flows in the thickener’s body were studied using computational experiments on a model developed in the ANSYS Fluent software package, which is based on the real 3D geometry of a radial thickener. To build the geometry, the authors used a standard module GAMBIT. A computational experiment on cleaning the apatite concentrate discharge was performed on a virtual stand. The distributions of the concentrations of volume fractions of particles and the velocities of their movement in the thickener’s volume were obtained. The results of laboratory studies and computer simulation data allow the authors to tell about the prospect implementation of the technology of intra-plant water circulation, which will reduce by 10% the amount of wastewater discharged into the tailing dump. The use of the most efficient reagents will provide optimal water parameters for the content of suspended particles and hardness cations and, ultimately, will increase the technological and environmental performance of the Khibiny apatite-nepheline ores processing.\"","PeriodicalId":329177,"journal":{"name":"GEOLINKS Conference Proceedings","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131297468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MATERIAL CHARACTERISTICS AND RECYCLING OF INDIUM-CONTAINING WASTES","authors":"A. Piotrowicz, S. Pietrzyk","doi":"10.32008/geolinks2021/b2/v3/15","DOIUrl":"https://doi.org/10.32008/geolinks2021/b2/v3/15","url":null,"abstract":"The aim of article is to present the types of indium wastes, including WEEE and by-products resulting from manufacturing. The authors decided to collect information about the chemical composition of wastes containing indium in one place. Methods and processes of recycling indium from WEEE and by-products are also presented.","PeriodicalId":329177,"journal":{"name":"GEOLINKS Conference Proceedings","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131315574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DETERMINATION OF POLYPHENOLIC COMPOUNDS OF LYSIMACHIA NUMMULARIA L.","authors":"Suciu Felicia, Roșca Adrian Cosmin, Lupu Carmen, Popescu Antoanela, Badea V. Victoria","doi":"10.32008/geolinks2021/b1/v3/08","DOIUrl":"https://doi.org/10.32008/geolinks2021/b1/v3/08","url":null,"abstract":"\"The history of medicinal plants is associated with the evolution of civilization. In all regions of the world, the history of nations shows that these plants have always occupied an important place in medicine, in cosmetic products, and culinary preparations. The paper aims to determine the total polyphenols in different parts of the species Lysimachia nummularia L. In our study, we focused on the extraction of polyphenolic compounds in different solvents. The solvents used in the extraction were: 40% ethanol, concentrated methanol, in water. The total polyphenol content was determined by spectrophotometric methods, a method from the European Pharmacopoeia 10.0, with minor modifications. The total polyphenol content of different extracts varied depending on the extraction process. Different parts of the plant and different solvents were used in the determinations carried out to establish the optimal extraction method for the organs of Lysimachia nummularia L.\"","PeriodicalId":329177,"journal":{"name":"GEOLINKS Conference Proceedings","volume":"256 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132914002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"GREEN DESIGN AND EDUCATION OF STUDENTS AT UNIVERSITIES IN THE SLOVAK REPUBLIC","authors":"Pavla Balážová","doi":"10.32008/geolinks2021/b2/v3/42","DOIUrl":"https://doi.org/10.32008/geolinks2021/b2/v3/42","url":null,"abstract":"\"Buildings represent a sector with huge energy consumption. It is necessary to reduce this consumption, therefore green buildings have become a global trend in recent years. Green Building Councils in various countries, which are members of World Green Building Council global network, develop and administer many of the world’s ratings tools. World Green Building Council was founded in 1998. There are four predominate ranking systems: LED, BREEAM, GREEN STAR and CASBEE. Slovak Green Building Council was established in November 2010. The first green building in the Slovak Republic received LEED certification in 2012. In the paper it is referred to about 17 new and in-use green buildings in Slovakia which received in period 2012-2019 LEED or BREEAM certifications. In fact, there are more green buildings in Slovakia, where there is still the huge potential in applying a green concept in the sector of existing residential buildings and the public buildings sector. There is a lack of legislative and financial support instruments for green buildings in Slovakia, which are under the consideration and do not exist in practice. The BBC 1 Plus – Offices in Bratislava, the first certified green office building in Slovakia, which received in 2012 the second-highest certification – LEED Gold, is described and analysed in details. The necessity of improving the education process in the green design and sustainable architecture of students at Faculties of Civil Engineering and Faculties of Architecture is outlined. The plans for how it is possible to achieve it are presented.\"","PeriodicalId":329177,"journal":{"name":"GEOLINKS Conference Proceedings","volume":"340 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132890762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"THE NORMALIZED DIFFERENCE VEGETATION INDEX AS AN INDICATOR OF DYNAMICS","authors":"Haddad Amar, Beldjazia Amina, Kadi Zahia, R. Lilia, R. Malika","doi":"10.32008/geolinks2021/b2/v3/27","DOIUrl":"https://doi.org/10.32008/geolinks2021/b2/v3/27","url":null,"abstract":"Mediterranean ecosystems are considered particularly sensitive to climate change. Any change in climatic factors affects the structure and functioning of these ecosystems and has an influence on plant productivity. The main objective of this work is to characterize one of the Mediterranean ecosystems; the Chettaba forest massif (located in the North-East of Algeria) from a vegetation point of view and their link with monthly variations using Landsat 8 satellite images from five different dates (June 25, 2017, July 27, 2017, August 28, 2017, October 15, 2017). The comparison of NDVI values in Aleppo pine trees was performed using analysis of variance and the use of Friedman's non-parametric test. The Mann-Kendall statistical method was applied to the monthly distribution of NDVI values to detect any trends in the data over the study period. The statistical results of NDVI of Aleppo pine trees indicate that the maximum value is recorded in the month of June, while the lowest values are observed in the month of August where the species studied is exposed to periods of thermal stress.","PeriodicalId":329177,"journal":{"name":"GEOLINKS Conference Proceedings","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129494863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"RECYCLING OF IRON ORE PROCESSING WASTES FOR REDUCTION OF INDUSTRIAL IMPACT ON THE ENVIRONMENT","authors":"M. Khokhulya, A. Fomin, S. Alekseeva, Ilya Karpov","doi":"10.32008/geolinks2021/b2/v3/20","DOIUrl":"https://doi.org/10.32008/geolinks2021/b2/v3/20","url":null,"abstract":"","PeriodicalId":329177,"journal":{"name":"GEOLINKS Conference Proceedings","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130828227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"FLOCCULATION OF FINE APATITE AIMED AT REDUCING ENVIRONMENTAL WATER USE PROBLEMS IN MINERAL PROCESSING PLANTS","authors":"A. Artemev","doi":"10.32008/geolinks2021/b1/v3/48","DOIUrl":"https://doi.org/10.32008/geolinks2021/b1/v3/48","url":null,"abstract":"\"Water treatment technologies involving pre-treated industrial effluents without transporting them to the tailing dump are of interest primarily from an environmental point of view, as they reduce the environmental burden. The paper studies the possibility of purification of process waters from apatite concentrate production from suspended particles and water-soluble impurities using polyacrylamide flocculants. By studying the processes of adsorption of H+ and OH- ions from aqueous solutions, the acid-base properties of the surface of the solid phase of the most polluted technological product - the drain of the apatite concentrate thickener - the mineral composition of which is 90% apatite have been studied. The influence of the reagents present in the processing technology on the quantitative ratio of acid-base centres on the apatite surface has been evaluated. It has been shown that the interaction of these reagents with the mineral creates prerequisites for a greater efficiency of the anionic flocculant. The electro-surface properties of apatite treated with various reagents were studied using the laser Doppler electrophoresis method. The mechanism of fixation of ions present in the dispersion medium on the surface of apatite was studied by infrared spectroscopy. In order to determine the conditions under which various flocculants are in the most ionized state, studies were conducted on the change in the viscosity of the polyelectrolyte solution at different pH values. The position of the isoionic point for samples of cationic and anionic flocculants in the presence of reagents used in the apatite flotation and dehydration of apatite concentrate was studied. A research has been carried out on \"\"model\"\" and real suspensions in circulating water for a number of cationic, anionic and nonionic flocculants. The kinetic and concentration dependences of the flocculating capacity of the studied reagents were determined, which confirmed the high efficiency of the anionic type reagents\"","PeriodicalId":329177,"journal":{"name":"GEOLINKS Conference Proceedings","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115154459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"SIMULATION METHODOLOGY FOR PILOT MODEL OF SOLAR WATER HEATING UNIT","authors":"R. Omarov, M. Kunelbayev, Omar Dauren, Tanirnazar Sultangaziyev, A. Baibolov","doi":"10.32008/geolinks2021/b2/v3/39","DOIUrl":"https://doi.org/10.32008/geolinks2021/b2/v3/39","url":null,"abstract":"In the given work there is shown the methodology of simulating the experimental model of solar water heating unit. Using theoretical and experimental outcomes, also, obtained rated values of transmittance medium in solar collector, there has been carried out predictive analysis of solar irradiation flow density, ambient temperature and temperature in the accumulator tank. Estimated and experimental daily characteristics of both systems have efficient accuracy of 7%, which proves reliability of constructive formulae and engineering model. As well, there has been computed the unit capacity factor, plants’ production growth constitutes from 0.5 to 0.85%. Computed the coefficient, which depends on heat flow and solar collector’s surface, as well on convective heat exchange between solar irradiation and solar collector’s surface. Experimentally executed computation of solar water heating unit’s performance, which is fulfilled in compliance with hourly sums of direct and scattered irradiation and ambient temperature","PeriodicalId":329177,"journal":{"name":"GEOLINKS Conference Proceedings","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115526187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MARINE FORECAST FOR THE EASTERNMOST PART OF THE BLACK SEA","authors":"D. Demetrashvili, V. Kukhalashvili, D. Kvaratskhelia, A. Surmava","doi":"10.32008/geolinks2021/b1/v3/50","DOIUrl":"https://doi.org/10.32008/geolinks2021/b1/v3/50","url":null,"abstract":"Modelling and forecasting of dynamic processes and distribution of various substances of anthropogenic and natural origin in coastal and shelf zones of the seas and oceans are of great interest due to the high anthropogenic load of these zones. The aim of this paper is to present some examples of modelling and short-term forecasting of dynamic fields – the current, temperature and salinity in the easternmost Black Sea covering Georgian sector of the Black Sea and adjacent water area using a high-resolution regional model of the Black Sea dynamics. The z-level regional model is based on a full system of ocean hydro-thermodynamics equations and is nested in the basin-scale model of the Black Sea dynamics of Marine Hydrophysical Institute (Sevastopol). To solve the model equation system, a numerical algorithm based on the splitting method is used. Calculations show that circulation processes in the easternmost water area of the Black Sea are characterized by a permanent alternation of different circulation modes with the formation of mesoscale and submesoscale eddies throughout the year, which significantly affect the formation of thermohaline fields; atmospheric wind forcing substantially determines not only the peculiarities of the sea surface horizontal circulation, also the vertical structure of the current field.","PeriodicalId":329177,"journal":{"name":"GEOLINKS Conference Proceedings","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116478261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ASPECTS CONCERNING PEANUTS CROPS ON SANDY SOILS IN SOUTHERN OLTENIA","authors":"M. Dima","doi":"10.32008/NORDSCI2018/B2/V1/25","DOIUrl":"https://doi.org/10.32008/NORDSCI2018/B2/V1/25","url":null,"abstract":"\"For the capitalization of the climate and soil conditions for the sandy soil region in Southern Oltenia by cultivating peanuts it is necessary to use varieties with large production abilities and proper technology for the crops. In view of its cultivation on south Oltenia sandy soils, there were carried out in the period 2004-2006, at the Plants Crops Research and Development Station on Sandy Soils Dabuleni, experiments have been set regarding aspects such as: the optimal seeding period, the recommendation varieties with high yield potential and balanced composition. The research was conducted under irrigation conditions, in a three-year rotation of wheat, peanut, maize. Along with erect growth type varieties, known for their short vegetation period, rising and creeping growth type varieties can also be used; these varieties have a great production potential in our country`s conditions. Establishing the proper time for seeding is espe since sandy soils are heating quickly but are also cooling quickly, the best seeding time is between the end of April- the beginning of May, depending on the date when the seeding depth has a steady temperature, minimal required for the seed to germinate.\"","PeriodicalId":329177,"journal":{"name":"GEOLINKS Conference Proceedings","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123561777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}