Претрага
157 items
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Seasonal Variations of the Zapadna Morava River Water Quality
The water samples collected from four localities of the middle course of the Zapadna Morava River during 2020 were analyzed via the selected physicochemical parameters with the aim to estimate the quality of surface water. According to the results of selected physico-chemical parameters (pH, conductivity, dissolved oxygen, chemical oxygen demand, biochemical oxygen demand), analyzed surface water show a good chemical status, while the values of nutrient content (nitrate, nitrite, ammonium ion, total phosphorus) indicated the poor chemical status especially ...Nebojša Đ. Pantelić, Jana S. Štrbački, Goran Marković, Jelena B. Popović-Đorđević. "Seasonal Variations of the Zapadna Morava River Water Quality" in Zbornik radova Savetovanja o biotehnologiji sa međunarodnim učešćem (Čačak, 12-13. mart 2021), University of Kragujevac, Faculty of Agronomy (2021). https://doi.org/10.46793/SBT26.357P
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Condition, problems and prospects of water supply from groundwater in Serbia
Vesna Ristić Vakanjac, Bojan Hajdin (2019)Vesna Ristić Vakanjac, Bojan Hajdin. "Condition, problems and prospects of water supply from groundwater in Serbia" in National Conference with international participation “Geosciences 2019”, Sofia : Bulagrian Geological Society (2019)
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Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery
... show a couple of endothermic peaks (Fig. 5). The first significant endothermic peak at between 120% and 220%C is associated with the loss of adsorbed and interlayer water and indicates the presence of layered silicates such as illite, kaolinite, halloysite and/or mont- morillonite (Greene-Kelly, 1957; ...
... Milošević et al. (2019a). removal of aplastic material (pebbles or plants), the clay mix is first immersed in a barrel of water and left to stand in it for the next 24h. As the excess water is drained, the clay body is extracted onto a table, which will allow for its further prepar- ation and for the addition ...
... _ Paragonite 4 – - (Baccour et al., 2008) as a *dark-firing' ceramic body (Dondi et al., 2001; Milošević & Logar, 2017). The relatively large loss on ignition (LOI; 15.86%) may be related to dehydroxylation of hydrated minerals or hydroxides, oxidation of organic materials and decomposition ...Maja Milošević, Biljana Đorđević, Mihovil Logar. "Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery" in Clay Minerals (2020). https://doi.org/10.1180/clm.2020.20
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Prilog poznavanju režima i bilansa voda reke Resave
Sliv Resave zauzima područje između reke Velike Morave i obronaka Kučajsko-beljaničkih planina. Sliv i režim ove reke kontroliše se dvema hidrološkim stanicama: Manastir Manasija (slivno područje u iznosu od 388 km2) i Svilajnac (681 km2). Za potrebe analize režima voda reke Resave i uticaja padavina na formiranje oticaja sa njenog sliva preuzeti su podaci o padavinama sa meteorološke stanice Crni Vrh (1037 m nm) koji odslikava režim gornjeg dela sliva ove reke, i meteorološke stanice Smederevska ...Marina Mitrašinović, Vesna Ristić Vakanjac, Saša Milanović, Ljiljana Vasić, Dušan Polomčić. "Prilog poznavanju režima i bilansa voda reke Resave" in Zbornik radova XVI Srpski hidrogeološki simpozijum sa međunarodnim učešćem, Zlatibor, 2022., Univerzitet u Beogradu, Rudarsko-geološki fakultet (2022)
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Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series
Luka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić (2021)Underground mining engineers and planners in our country are faced with extremely difficult working conditions and a continuous shortage of money. Production disruptions are frequent and can sometimes last more than a week. During this time, gate road support is additionally exposed to rock stress and the result is its progressive deformation and the loss of functionality of gate roads. In such an environment, it is necessary to develop a low-cost methodology to maintain a gate road support system. ...deformacije podgrade, lasersko skeniranje, višekanalna singularna spektralna analiza, prognoza, klasterisanje fuzzy vremenskih serija... last more than a week. During this time, gate road support is additionally exposed to rock stress and the result is its progressive deformation and the loss of functionality of gate roads. In such an environment, it is necessary to develop a low-cost methodology to maintain a gate road support system. For ...
... last more than a week. During this time, gate road support is additionally exposed to rock stress and the result is its progressive deformation and the loss of functionality of gate roads. In such an environment, it is necessary to develop a low-cost methodology to maintain a gate road support system. For ...
... bounded by B(t) =[Bl(t),Bu(t)] at the current time t, where Bl(t) represents the lower edge and Bu(t) represents the upper edge of the support. Without loss of generality, we equal the upper edge with the lower and transform the surface of the support into one line, i.e., we reduce a real two-dimensional ...Luka Crnogorac, Rade Tokalić, Zoran Gligorić, Aleksandar Milutinović, Suzana Lutovac, Aleksandar Ganić. "Gate Road Support Deformation Forecasting Based on Multivariate Singular Spectrum Analysis and Fuzzy Time Series" in Energies, MDPI (2021). https://doi.org/https://doi.org/10.3390/en14123710
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Surface functional groups and degree of carbonization of selected chars from different processes and feedstock
Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann (2022)The knowledge ofthe structural and chemical properties of biochars is decisive for their application as technical products. For this reason, methods for the characterization of biochars that are generally applicable and allow quality control are highly desired. Several methods that have shown potential in other studies were used to investigate two activated carbons and seven biochars from different processes and feedstock. The chars were chosen to cover a wide range of chemical composition and structural properties as a hardness ...Biougalj, različiti procesi dobijanja, različite sirovine, površinski aktivne grupe, x-ray, FT-IR,XPS... best discussed by a van Krevelen diagram (Fig 2) [52,75]. All chars except PW700g show a higher H/C and a lower O/C ratio than expected for the loss of water from formal car- bohydrate (CH»O), the elementary building block of plant biomass, as represented by the 2.0 w= chars — — – line C, -e to ...
... combustion for the ash determination. Therefore, it cannot have been present as phosphate, but as phosphoric acid which decomposes above 213 "C by loss of water. The resulting P,O,o sublimes above 362 "C and is not part ofthe ash. Consequently, Y is lower than Y„„x for AC2 in contrast to all other chars ...
... the presence of OH groups, but discrimi- nation and quantification of different types of OH groups are difficult due to the interference of water and the loss of intensity for chars made at higher temperature. Attempts to quantify different acidic functional groups by Boehm titration [57,59] yielded ...Marija Ilić, Franz-Hubert Haegel, Aleksandar Lolić, Zoran Nedić, Tomislav Tosti, Ivana Sredović Ignjatović, Andreas Linden, Nicolai D. Jablonowski, Heinrich Hartmann. "Surface functional groups and degree of carbonization of selected chars from different processes and feedstock" in PLOS ONE (2022). https://doi.org/10.1371/journal.pone.0277365
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Stochastic Prediction of Temporal Variations of Karst Groundwater Regime in Function of Sustainable Management: Case Study Mokra Karst Spring (SE Serbia)
Veljko Marinović, Branislav Petrović (2021)Veljko Marinović, Branislav Petrović. "Stochastic Prediction of Temporal Variations of Karst Groundwater Regime in Function of Sustainable Management: Case Study Mokra Karst Spring (SE Serbia)" in Karst: From Top to Bottom, Belgrade, 6.6.2021., Belgrade : Centre for Karst Hydrogeology (2021)
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A hydraulic–hydrochemical approach to impact assessment of a grout curtain on karst aquifer behavior
Igor Jemcov, Marina Ćuk Đurović (2020)Igor Jemcov, Marina Ćuk Đurović. "A hydraulic–hydrochemical approach to impact assessment of a grout curtain on karst aquifer behavior" in Hydrogeology Journal, Springer Science and Business Media LLC (2020). https://doi.org/10.1007/s10040-020-02245-4
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Properties of fly ash and slag from the power plants
This paper describes the physical, chemical and mineral properties of ash and slag, which were taken from thermal power plants Nikola Tesla A, Nikola Tesla B, Kostolac A and Kostolac B. The knowledge of the mineralogical material composition is important because the type of minerals directly determines the properties of the fly ash and slag and their possible application. Laboratory tests showed that ash and slag samples consist of the following minerals: amorphous materials, quartz, feldspar, mullite, melilite, cristobalite, ...fly ash, slag, physical composition, chemical composition, mineral composition, X-ray diffraction method... cooled and extinguished in water. The fly ash and slag landfills in Serbia occupy an area of 1639 ha and if they are under constant control and monitoring, significantly influence the dis- ruption of the environment, which is reflected in the pollution of: air, soil, surface water and groundwater, vegetation ...
... 0.51 1.02 KO A (s) 36.02 32.98 12.24 7.56 5.53 1.83 1.96 0.78 0.48 0.69 KO B (s) 4.47 48.91 21.54 11.32 8.87 2.43 0.23 0.40 0.49 0.74 LOI 1000 – loss on ignition 1000°C; m – �y ash for month May; j – �y ash for month June; (s) – slag; NT – Nikola Tesla; KO – Kostolac Figure 5. The R module according ...
... Al2O3(0.43) M(0.75) R(0.58) w(0.63) CaO(0.47) K2O(0.77) Al2O3(0.99) M(0.99) R(0.63) <63 M(0.60) AM(0.56) Q(0.59) M(1.00) AM(0.98) Q(0.41) LOI 1000 – loss on ignition 1000 °C; R – module R; AM – the amorphous material; Q – quartz; f – feldspar; M – mullite; Ml – melilite; Cr – cristobalite; He – hematite; ...Miloš Šešlija, Aleksandra Rosić, Nebojša Radović, Milinko Vasić, Mitar Đogo, Milovan Jotić. "Properties of fly ash and slag from the power plants" in Geologia Croatica, Zagreb : Croatian Geological Survey (2016). https://doi.org/10.4154/gc.2016.26
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2D geoelectrical resistivity tomography application at the former city waste dump "Ada Huja": Eco-geological problem
... measurements and borehole data did show a groundwater level existed, that water reacts with the decomposing waste and creates and electrolyte with a very low resistivity value. The fibrous minerals do not react with water nor with acid solutions except chrysotile which in a reaction with acidic ...
... (Marković and Stevović, 2016). The presence of water vapor 74 Sretenović B., Arnaut F., Vasiljević I., Cvetkov V. can speed up the process of gas production. This is of great value for the examined terrain “Ada Huja” because underground water level was detected. 4 CORRECT ECOLOGICAL AND ...
... landfill is the isolation of the disposed waste. This implies scouting the terrain for favorable conditions (not in contact with a water spring or any underground water, appropriate rock type basis, further enough from housing estates but still a good road connection etc.) and after this the engineering ...Branislav Sretenović, Filip Arnaut, Ivana Vasiljević, Vesna Cvetkov. "2D geoelectrical resistivity tomography application at the former city waste dump "Ada Huja": Eco-geological problem" in Podzemni radovi, Centre for Evaluation in Education and Science (CEON/CEES) (2019). https://doi.org/10.5937/PodRad1934059S
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Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae
Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović (2019)Two previously unidentified dehydroabietane isomers were isolated from Miocene Serbian lignite and Rhaetian (Late Triassic) coaly mudstones from South Sweden and characterized using NMRspectroscopy as cis- and trans-dehydroicetexane. Both have a 9(10?20)-abeo-abietane or icetexane skeleton, consisting of a 6-7-6 tricyclic framework with seven carbons in ring B instead of the usual six in common diterpanes of the abietane-type. Dehydroicetexanes can be detected using GC-MS-MS in m/z 270?146 chromatograms without interference from dehydroabietane or other isomers. Dehydroicetexanes are often abundant ...Hans Peter Nytoft, Geir Kildahl-Andersen, Sofie Lindström, Frode Rise, Achim Bechtel, Danica Mitrović, Nataša Đoković, Dragana Životić, Ksenija A. Stojanović. "Dehydroicetexanes in sediments and crude oils: Possible markers for Cupressoideae" in Organic Geochemistry, Elsevier BV (2019). https://doi.org/10.1016/j.orggeochem.2019.01.001
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Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)
A groundwater flow model was developed to simulate groundwater extraction from the public water supply source of the City of Kikinda. The hydrodynamic model includes the municipal groundwater source of Kikinda (Šumice and the Jezero Well), but also an extended area where there are groundwater sources that provide water supply to three factories: (MSK, TM and LŽT - Kikinda). Hydrodynamic modeling, based on the numerical method of finite differences will show the groundwater balance of the sources in the ...... hydrogeological research [1-3], water source optimization and sustainable development of water supply systems [4-6], drinking water supply [7], different types of factors and processes that influence water source performance [8], water quality [9, 10], and protection of water sources [6, 11]. The ...
... m and the lowest 76 m. Water supply is provided to Kikinda by means of 11 wells. The tapped water-bearing horizon is at a depth of about 250 m, formed in Quaternary sands whose thickness is about 50 m. In the vicinity there are also groundwater sources for industrial water supply, which have a certain ...
... was formed within several water-bearing complexes of Quaternary sands. Although this aquifer comprises a number of water-bearing layers, it was not possible to separate them on the basis of geometry, hydraulic interactions and physico chemical characteristics of the water. The reason for this is ...Dušan Polomčić, Dragoljub Bajić, Jelena Zarić. "Determining the Groundwater Balance and Radius of Influence Using Hydrodynamic Modeling: the Case Study of the Groundwater Source “Šumice” (Kikinda, Serbia)" in Journal of Sustainable Development of Energy, Water and Environment Systems (2015). https://doi.org/10.13044/j.sdewes.2015.03.0017
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Application of the principle of circular economy to the thermal groundwater, the example of the municipality of Bogatić
There are about 360 locations of thermal and thermo-mineral waters in Serbia, whose water temperatures range from 14 to 98°C, which ranks Serbia as the richest European country in geothermal energy. The mentioned water resources (thermal and thermomineral waters) are used, mostly, for therapeutic purposes in spas and sports and recreational centers. The main problem that is present is the fact that they are not used in a rational and efficient way. The paper will give examples territorially related ...Marija Jovanović, Vesna Ristić Vakanjac. "Application of the principle of circular economy to the thermal groundwater, the example of the municipality of Bogatić" in Book of proceedings of the 3rd International Scientific Conference on vircular and bioeconomy CIBEK2021, Belgrade, Belgrade : School of Engineering Management (2021)
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Anthropogenic impact on the groundwater regime: Case study of the Velika Morava alluvium
Jovana Mladenović, Vesna Ristić Vakanjac, Milan Kresojević, Boris Vakanjac, Jugoslav Nikolić, Dušan Polomčić, Dragoljub Bajić (2023)The Velika Morava River originates at the junction of the Južna Morava and Zapadna Morava at the town of Stalać in Serbia. It is 185 km long and empties into the Danube. The Velika Morava River Basin occupies a land area of 37 444 km2. The river flows through central Serbia, which features the most fertile land and the highest population density in the country. Public water supply in this region of Serbia relies on groundwater formed in alluvial ...Jovana Mladenović, Vesna Ristić Vakanjac, Milan Kresojević, Boris Vakanjac, Jugoslav Nikolić, Dušan Polomčić, Dragoljub Bajić. "Anthropogenic impact on the groundwater regime: Case study of the Velika Morava alluvium" in National Conference with International Participation “GEOSCIENCES 2023”, Review of the Bulgarian Geological Society, Sofia : Bulgarian Geological Society (2023)
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Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels
Irina Zahirovic, Dušan Danilović, Milica Šuput Vranjin, Miloš Tripković. "Laboratory Testing of Nanosilica- Reinforced Silicate and Polyacrylamide Gels" in SPE Journal (2023)
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Project BEWARE—Landslide Post-disaster Relief Activities for Local Communities in Serbia
Biljana Abolmasov, Dobrica Damjanović, Miloš Marjanović, Ranka Stanković, Velizar Nikolić, Sandra Nedeljković, Žarko Petrović (2017)... Classification, description, causes and indirect effects-Canadian technical guidelines and best practices related to landslides: a national initiative for loss reduction, Geol Surv Can Open File 7359 Marjanović M, Abolmasov B (2015) Recording and spatial analysis of landslides recorded in May 2014. J Constr ...Biljana Abolmasov, Dobrica Damjanović, Miloš Marjanović, Ranka Stanković, Velizar Nikolić, Sandra Nedeljković, Žarko Petrović. "Project BEWARE—Landslide Post-disaster Relief Activities for Local Communities in Serbia" in Advancing Culture of Living with Landslides, Proceedings of 4th World Landslide Forum, Ljubljana 29 May-02 June 2017 3, Berlin : Springer Interantional (2017). https://doi.org/10.1007/978-3-319-53487-9_48
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Optimising in electrical energy consumption in mining plants
Snežana Aleksandrović, Vesna Damnjanović, Ilija Jeftenić. "Optimising in electrical energy consumption in mining plants" in 17th International Symposium INFOTEH-JAHORINA 2018, Istočno Sarajevo : Elektrotehnički fakultet, Univerzitet u Istočnom Sarajevu (2018)
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The Importance of Detailed Groundwater Monitoring for Underground Structure in Karst (Case Study: HPP Pirot, Southeastern Serbia)
... Scaling for Treated Water of Two Water Treatment plants in Al-Hilla City. J. Babylon Univ. Eng. Sci. 2012, 4, 234–241. 16. Leitz, F.; Guerra, K. Water Chemistry Analysis for Water Conveyance, Storage and Desalination Projects Manuals and Standards Program; Technical Service Center, Water Treatment Group: ...
... and the water transported by a pressurized tunnel. Most studies dealing with this subject matter consider the problem of rapid groundwater inflow into a tunnel [4–9] and issues of structural stability [10,11]. Water 2019, 11, 603; doi:10.3390/w11030603 www.mdpi.com/journal/water pes water (mort, Article ...
... and the water transported by a pressurized tunnel. Most studies dealing with this subject matter consider the problem of rapid groundwater inflow into a tunnel [4-9] and issues of structural stability [10,11]. Water 2019, 11, 603; doi:10.3390/w11030603 www.mdpi.com/journal/water Water 2019, 11 ...Marina Čokorilo Ilić, Ana Mladenović, Marina Ćuk, Igor Jemcov. "The Importance of Detailed Groundwater Monitoring for Underground Structure in Karst (Case Study: HPP Pirot, Southeastern Serbia)" in Water, MDPI AG (2019). https://doi.org/10.3390/w11030603
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Numerical Modeling and Simulation of the Effectiveness of Groundwater Source Protection Management Plans: Riverbank Filtration Case Study in Serbia
The paper describes the establishment and testing of an algorithm for developing sustainable management plans associated with groundwater source protection against potential pollutants and discusses the effectiveness of individual systems. The applied methodology pertains to groundwater resource management, particularly those cases that involve riverbank filtration. Namely, groundwater (numerical) modeling is employed to examine the groundwater regime and balance, as well as to create protection systems and illustrate their effectiveness. Particle tracking analysis is used to study pollutants’ travel and ...Dušan Polomčić, Dragoljub Bajić, Bojan Hajdin, Dragan Pamučar. "Numerical Modeling and Simulation of the Effectiveness of Groundwater Source Protection Management Plans: Riverbank Filtration Case Study in Serbia" in Water, MDPI AG (2022). https://doi.org/10.3390/w14131993
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Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils
Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov (2021)MICP process, kinetic study, calcite, vaterite, MALDI-TOF identification, Bacillus licheniformis, Sporosarcina pasteurii... all samples with FTIR analysis. Weight loss dynamics below 400 ◦C vary to a certain extent probably due to a difference in precipitate microstructure (density and particle size), as well as absorbent water. The second part of the DTA diagram shows rapid weight loss above 600 ◦C, followed by a strong peak ...
... modify soil characteristics resulting in stabilization from the action of wind and water erosion [3], removing heavy metals from wastewaters [4], or promoting the self-healing effect of calcareous materials [5]. The water absorption of the monumental limestone was reduced by 60% after the MICP treatment ...
... modify soil characteristics resulting in stabilization from the action of wind and water erosion [3], removing heavy metals from wastewaters [4], or promoting the self-healing effect of calcareous materials [5]. The water absorption of the monumental limestone was reduced by 60% after the MICP treatment ...Olja Šovljanski, Lato Pezo, Jovana Stanojev, Branimir Bajac, Sabina Kovač, Elvira Tóth, Ivan Ristić, Ana Tomić, Aleksandra Ranitović, Dragoljub Cvetković, Siniša Markov. "Comprehensive Profiling of Microbiologically Induced CaCO3 Precipitation by Ureolytic Bacillus Isolates from Alkaline Soils" in Microorganisms, MDPI AG (2021). https://doi.org/10.3390/microorganisms9081691