Претрага
550 items
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Unusually sluggish microemulsion system with water, toluene and a technical branched alkyl polyethoxylate
Marija Ilić, Franz-Hubert Haegel, Vesna Pavelkić, Snežana Zlatanović, Zoran Marković, Aleksandar Cvjetić (2015)Microemulsion systems with water, toluene and nonionic surfactants are interesting for application due to the excellent solvent properties of aromatic hydrocarbons. In this study, the pseudo-binary phase diagram (“fish-diagram”) of such a ternary system was investigated using a branched technical alkyl polyethoxylate. Lutensol ON 50 (i-C10E5) was considered a suitable surfactant. The system with technical branched i-C10E5 exhibits very long, and for compositions near optimum solubilization, i.e., the minimum content of surfactant needed for a bicontinuous microemulsion, extremely long ...микроемулзија, толуен, оксоалкохол етоксилат, термодинамичка стабилност, тернарни фазни дијаграми, дијаграми „fish“Marija Ilić, Franz-Hubert Haegel, Vesna Pavelkić, Snežana Zlatanović, Zoran Marković, Aleksandar Cvjetić. "Unusually sluggish microemulsion system with water, toluene and a technical branched alkyl polyethoxylate" in Chemical Industry and Chemical Engineering Quarterly (2015). https://doi.org/10.2298/CICEQ141012045I
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Kvantitativni status podzemnih voda aluvijona Velike Morave (potez Bagrdan - ušće)
Jovana Mladenović, Milan Kresojević, Dušan Polomčić, Dejan Đorđević, Boris Vakanjac, Jugoslav Nikolić, Vesna Ristić Vakanjac (2023)Велика Морава настаје спајањем Јужне и Западне Мораве код Сталаћа и њена дужина тока од формирања до ушћа у Дунав износи 185 км. Укупна сливна површина ове реке заједно са њеним саставницама износи од 37.444 км2 што је територијално око 42% Републике Србије чинећи ову реку њеним главним дреном. Протиче централним делом Србије, најплоднијим земљиштем као и најгушће насељеним деловима наше земље. Добра хидрауличка веза вода Велике Мораве и подземних вода утицале су на то да у оквиру алувијона ...Jovana Mladenović, Milan Kresojević, Dušan Polomčić, Dejan Đorđević, Boris Vakanjac, Jugoslav Nikolić, Vesna Ristić Vakanjac. "Kvantitativni status podzemnih voda aluvijona Velike Morave (potez Bagrdan - ušće)" in Zbornik radova III Kongresa geologa Bosne i Hercegovine sa međunarodnim učešćem, Neum, 21-23.9.2023., Ilidža : Udruženje/udruga geologa u Bosni i Hercegovini (2023)
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Evaluating Bank Filtration as an Alternative to the Current Water Supply from Deeper Aquifer: A Case Study from the Pannonian Basin, Serbia
Stauder Stefan, Stevanović Zoran, Richter Christian, Milanović Saša, Tucović Andra, Petrović Branislav (2012)Stauder Stefan, Stevanović Zoran, Richter Christian, Milanović Saša, Tucović Andra, Petrović Branislav . "Evaluating Bank Filtration as an Alternative to the Current Water Supply from Deeper Aquifer: A Case Study from the Pannonian Basin, Serbia" in Water Resources Management 26 no. 2, New York:Springer-Verlag (2012): 581-594. https://doi.org/10.1007/s11269-011-9932-9
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Prospects for wider utilization of subgeothermal water resources: eastern Serbia case study
Stevanović Zoran, Saljnikov Aleksandar, Milenić Dejan, Martinović Mića, Goričanec Darko, Komatina Mirko, Dokmanović Petar, Antonijević Dragi, Vranješ Ana, Magazinović Sava (2011)Stevanović Zoran, Saljnikov Aleksandar, Milenić Dejan, Martinović Mića, Goričanec Darko, Komatina Mirko, Dokmanović Petar, Antonijević Dragi, Vranješ Ana, Magazinović Sava. "Prospects for wider utilization of subgeothermal water resources: eastern Serbia case study" in Geološki anali Balkanskog poluostrva no. 72, Beograd:Rudarsko-geološki fakultet (2011): 131-141. https://doi.org/10.2298/GABP1172131S
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Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers
This paper presents a dynamic California Bearing Ratio (CBRd) device that can be used on a prepared pavement foundation layer to obtain a certain parameter of the tested material in the laboratory and in situ in a direct and fast way. For the selected natural material (gravel), it is shown that the laboratory CBRd can be used to estimate the compaction and bearing capacity, because it correlates well with the parameters of the standard and modifed Proctor compaction tests. ...korelacija parametara, donji slojevi saobraćajnica, laboratorijska i terenska ispitivanja, dinamički kalifornijski indeks nosivosti CBRd... observed that, when the water con- tent for dry sample formation increased, CBRy „ decreased to 2.0% of the water content for formation, and then increased again as the water content increased from 2.0% to approximately 9.7% (SP) or 8.8% (MP), approaching w„ . Increasing the water content for formation ...
... depending on the water content for differ- ent compaction energies. Regarding the impact of water content on the formation of the gravelly material samples subjected to CBR,, testing, it was observed that CBR,, reached the highest value when the samples were compacted with water content close to ...
... fine-grained soil under different compaction conditions. The study considered clay material with a water content of approximately + 4% w (maximum dry bulk density p,wax = 1.82 Mg/m*, optimal water content Wop = 15.6%). A comparison between the results of California Bearing Ratio (CBR) research on ...Milan Bogdanović, Snežana Bogdanović, Dragoslav Rakić, Irena Basarić Ikodinović. "Correlation Between Dynamic CBR and Compaction and Bearing Capacity of Pavement Foundation Layers" in Soil Mechanics and Foundation Engineering, Springer Science and Business Media LLC (2024). https://doi.org/10.1007/s11204-024-09939-x
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FTIR Spectroscopic Study Of S-Metolachlor Sorption On Inorganic And Organically Modified Montmorillonite From Bogovina
... herbicides are a causing concern due to their increasing presence in soil, groundwater and surface water. Numerous methods are developed in order to reduce herbicide mobility and protect natural water resources. The results presented in this paper show the interaction of herbicide S-metolachlor with ...
... of the adsorbed water, as a consequence of the reduction of the hydrogen bond strength in HDTMA-montmorillonite. Also, the intensity of these bands decreases significantly with increasing concentration of HDTMA+ cation. All these changes are related to the decreasing of the water content in the ...
... Republic of Serbia Maize Research Institute “Zemun polje”, Belgrade, Serbia Semenarna d.o.o., Niš, Serbia Ministry of Agriculture, Forestry and Water Management of the Republic of Serbia – Directorate for Agricultural Land Terra Optima d.o.o., Topola, Serbia Best Seed Producer d.o.o., Feketić ...Lazar Kaluđerović, Zorica Tomić, Jelena Bogosavljević, Ljubomir Životić, Maja Milošević. "FTIR Spectroscopic Study Of S-Metolachlor Sorption On Inorganic And Organically Modified Montmorillonite From Bogovina" in 3rd International and 15th National Congress - Soils for Future under Global Challenges, Sokobanja, Serbia, Serbian Society of Soil Science (2021)
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AR, CR and ARCR modeling for simulations and analyses of karst groundwater quality parameters
Although an invisible component of the hydrologic cycle, groundwater generally takes precedence over other water resources in the area of drinking water supply. Among groundwater resources, karst aquifers tend to be rich in sufficiently-accessible amounts of high-quality water. During most of the year, this water requires only disinfection prior to delivery to the end user. However, in many cases extreme rainfall and/or sudden snow melt results in transient turbidity, increase in bacterial count and temporary contamination (e.g. increase in ...autocorrelation, cross-correlation, autoregressive model, cross-regressive model, autocross regressive model, nitrates, Banja Spring, Serbia.Vesna Ristić-Vakanjac, Marina Ćokorilo-Ilić, Petar Papić, Dušan Polomčić, Radisav Golubović. "AR, CR and ARCR modeling for simulations and analyses of karst groundwater quality parameters" in Geološki anali Balkanskoga poluostrva, National Library of Serbia (2018). https://doi.org/10.2298/GABP1879071R
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Introductory editorial - Special issue: Genesis and protection of groundwater in carbonate aquifer
Saša Milanović (2019)Saša Milanović. "Introductory editorial - Special issue: Genesis and protection of groundwater in carbonate aquifer" in Carbonates and Evaporites, Springer Science and Business Media LLC (2019). https://doi.org/10.1007/s13146-019-00487-2
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Atmospheric exposure vs burying: influences on damage intensity of built-in kersantite in the monument of the Small Staircase (Belgrade, Serbia)
Proučavan je efekat „zatrpanog kamena“ na intenzitet procesa degradacije prisutnih na kersantitu koji je ugrađen u spomenik Malo stepenište. Istraživanja su vršena na uzorcima stene iz kamenoloma i na oštećenim kamenim blokovima ugrađenim u spomenik. Dok su neki delovi stepeništa bili pod zemljom 90 godina, većina kamenih elemenata je bila izložena različitim uslovima sredine i antropogenim uticajima. Urađeno je detaljno mapiranje trenutnog stanja spomenika kako bi se istražio uticaj “zatrpavanja” i kompleksne geometrije spomenika na tip propadanja i variranje ...Nevenka Novaković, Predrag Dabić, Vesna Matović. "Atmospheric exposure vs burying: influences on damage intensity of built-in kersantite in the monument of the Small Staircase (Belgrade, Serbia)" in Environmental Earth Sciences, Springer Science and Business Media LLC (2023). https://doi.org/10.1007/s12665-023-10794-6
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Filter rules for soil and geosynthetics
Štetni efekti izazvani strujanjem vode kroz različite građevine (brane, nasipi i sl.) uspešno se rešavaju ugradnjom različitih filterskih slojeva. Osnovne funkcije filterskih slojeva su brza evakuacija vode uz sprečavanje unutrašnje erozije i iznošenje sitnih čestica tla. Ovi filterski slojevi najčešće se grade od krupnozrnih materijala (pesak, šljunak, kameni agregati), ali se pored prirodnih materijala sve više koriste i veštački geosintetički materijali. U radu su prikazana osnovna filtarska pravila koja treba ispoštovati da bi se izvelo uspešno projektovanje različitih filtracionih ...Dragoslav Rakic, Irena Basaric Ikodinovic, Milenko Ljubojev. "Filter rules for soil and geosynthetics" in Mining and Metallurgy Engineering Bor, Mining and Metallurgy Institute Bor (2021). https://doi.org/10.5937/mmeb2101001R
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Centar za hidrogeologiju karsta - 15 godina nauke i struke
... 1007/s12665-015-4548-7 Miladinović, B., Ristić Vakanjac, V., Bukumirović, D., Dragišić, V., Vakanjac, B.(2015): Simulation of mine water inflow: case study of the Štavalj coal mine (southwestern Serbia), Archives of Minig Sciences (Arch. Min. Sci.), ISSN 0860- 7001 (Ed Jakub Siemek), Vol. 60, No 4, p. ...
... karst phenomenology (karstification process, features). • Methods of water research in karst. • Characterization and conceptual definition of water circulation in karst, connection with otherT aquifers and surface Waters. • Water balancing in karst, the problem of delineating watersheds. • Specifics ...
... Specifics of the quantity and quality dynamics of karst spring water, water intakes and regulation structures in karst (spring zones and watersheds). • Construction conditions and problems associated with the use of surface Water reservoirs and other artificial structures in karst. • Vulnerability ...urednici Saša Milanović, Ljiljana Vasić, Zoran Stevanović, Branislav Petrović. Centar za hidrogeologiju karsta - 15 godina nauke i struke, Beograd : Univerzitet u Beogradu, Rudarsko-geološki fakultet, Centar za hidrogeologiju karsta, 2023
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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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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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Cutting Resistance Laboratory Testing Methodology for Underwater Coal Mining
... o-ring seals ensuring a water-tight connection [26]. The cell is filled with water, with the pressure in the water being controlled by a pressure unit. The sample is subjected to an equal all-around pressure, known as the confining pressure, σ3. The sample is entirely surrounded by water, at its cylindrical ...
... the material (coal) in natural conditions is also directly exposed to the water pressure at a certain depth. After installation of sample and triaxial cell closure, the cell is filled with water, with the pressure in the water being controlled by a pressure unit, and the sample is subjected to an equal ...
... ERC 1400-30/7 high-capacity excavators from lignite quarries. IOP Conf. Ser. Mater. Sci. Eng. 2016, 161, 012081. [CrossRef] 5. Mine Planning and Equipment Selection. Mine Plan. Equip. Sel. 2014, 303–310. [CrossRef] 6. Jovančić, P.; Ignjatović, D.; Novaković, D. Optimisation of Coal Cutting Bits ...Vladimir Čebašek, Veljko Rupar, Stevan Đenadić, Filip Miletić. "Cutting Resistance Laboratory Testing Methodology for Underwater Coal Mining" in Minerals, MDPI AG (2021). https://doi.org/10.3390/min11060564
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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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Karst groundwater quantity assessment and sustainability: the approach appropriate for river basin management plans
Veljko Marinović, Zoran Stevanović (2019)As a result of the fact that karstified rocks can accumulate large amounts of high-quality groundwater, karst aquifer is considered, throughout the world, one of the most important types of aquifers. Due to their high permeability, but also vulnerability to pollution, these precious groundwater resources need to be properly evaluated and protected. Taking into account heterogeneity and complexity of the karst environment, it is difficult to propose a uniform algorithm for managing karst groundwater, which causes the necessity to ...Upravljanje karstnim podzemnim vodama, Pritisci na kvantitet voda, Plan upravljanja vodnim resursima, Bosna i Hercegovina, SrbijaVeljko Marinović, Zoran Stevanović. "Karst groundwater quantity assessment and sustainability: the approach appropriate for river basin management plans" in Environmental Earth Sciences, Springer Science and Business Media LLC (2019). https://doi.org/10.1007/s12665-019-8364-3
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FTIR spectroscopic study оf S-мetolachlor сorption оn inorganic and organically modified montmorillonite from Bogovina
... herbicides are causing a concern due to their increasing presence in soil, groundwater and surface water. Numerous methods have been developed in order to reduce herbicide mobility and protect natural water resources. The results presented in this paper show the interaction of herbicide S- metolachlor ...
... of the adsorbed water, as a consequence of the hydrogen bond strength reduction in HDTMA-montmorillonite. Also, the intensity of these bands decreases significantly with the increasing . concentration of HDTMA* cation. All these changes are related to the decreasing of the water content in the ...
... 10.1007/978-1-4684-7092-–5_1 Cohen, S.Z., Eiden, C., Lorben, N.M. 1986. Monitoring ground water or pesticides, in: Garnar, R.C., Honeycure, R.C., Higg, H.N., (Eds.), Evaluation of Pesticides in Ground Water. ACS Symposium Series 315, American Chemical Society, Washington, DC, pp. 170—196. El-Nahhal ...Lazar Kaluđerović, Zorica Tomić, Jelena Bogosavljević, Ljubomir Životić, Maja Milošević. "FTIR spectroscopic study оf S-мetolachlor сorption оn inorganic and organically modified montmorillonite from Bogovina" in Book of Proceedings / 3rd International and 15th National Congress Soils for Future Under Global Challenges, 21-24 September 2021 Sokobanja, Serbia , Belgrade : Serbian Society of Soil Science (2021)
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Fish-otoliths from the marine-brackish water transition of Middle Miocene strata of Belgrade, Serbia
Schwarzhans Werner, Bradić Katarina and Rundić Ljupko. "Fish-otoliths from the marine-brackish water transition of Middle Miocene strata of Belgrade, Serbia" in Paläontologische Zeitschrift 4 no. 98, Berlin:Springer (2015): 815-837. https://doi.org/10.1007/s12542-015-0272-6
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Geothermal potential, chemical characteristic and utilization of groundwater in Serbia
To collect and unify data about all geothermal resources in Serbia, a database was formed. The database allows us to perceive the geothermal resources of Serbia and their potential for utilization. Based on the data available in the geothermal database, the estimated temperatures of reservoirs, heat power, and geothermal energy utilization were calculated. The database contains 293 geothermal records (springs, boreholes) registered at 160 locations, with groundwater temperatures in the range between 20 and 111 °C. The maximum expected ...Geothermal database, Geothermal resources, Geothermal potential, Hydrochemistry, Hierarchical cluster analysis, SerbiaTanja Petrović Pantić, Katarina Atanasković Samolov, Jana Štrbački, Milan Tomić. "Geothermal potential, chemical characteristic and utilization of groundwater in Serbia" in Environmental Earth Sciences, Springer Link (2021). https://doi.org/https://doi.org/10.1007/s12665-021-09985-w
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Environmental Risks to Air, Water and Soil Due to the Coal Mining Process
Ristović Ivica (2011)Ristović Ivica. "Environmental Risks to Air, Water and Soil Due to the Coal Mining Process" in Understanding and Managing Threats to the Environment in South Eastern Europe, NATO science for peace and security series 2, Ljubljana, Slovenia:SPRINGERLINK (2011): 251-264