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Упит dcterms_subject_txt:flotation waste water

615 items

  • Модел миграције нитрата у епикарсту: лабораторијски експеримент

    Бранислав Петровић (2022)
    Епикарст је део карстног изданског система који се налази у зони аерације и представља сложену област додира и мешања неконсолидованог материјала са површине терена, остатака карбонатних стена измењених корозивном водом, флоре и фауне и њихових остатака, који је делимично и повремено засићен подземном водом. Подручје истраживања примењених мултидисциплинарних истраживања био је карстни масив Суве планине (ЈИ Србија), односно подручје око мале пећине Печ, настале у епикарсту. Између осталих истраживања, опит трасирања (На-флуоресцеин) у пећини Печ помогао је у одређивању ...
    епикарст, модел, нитрати, специфична електрична проводљивост

  • Agent-based modeling as a support to an expert-based approach: Exploring individual heating systems transition

    Boban Pavlović, Marija Živković, Dejan Ivezić (2022)
    Expert-based energy scenarios are mainly developed following assumptions of experts and, in most cases, a limited number of stakeholders. Such an approach will provide satisfactory results in centrally managed energy sectors where further decisions could be envisaged relatively precisely (electricity production/distribution, district heating systems, etc.). The same approach will provide more uncertain outcomes of future energy structure in the household sector, where decisions related to consumption, selection of energy source, or application of specific technology are made by numerous ...
    Energetska tranzicija, Grejanje domaćinstava, Individualni sistemi grejanja, Energetsko planiranje, Integrisano energetsko planiranje, ABM, LEAP, Srbija

  • Režim pogranične reke Jerme

    Vesna Ristić Vakanjac, Marina Čokorilo Ilić, Dušan Polomčić, Dragoljub Bajić, Boris Vakanjac, Peđa Kostić (2019)
    Reka Jerma izvire na Vlasinskoj visoravni u zoni Vlasinskog jezera, teče prema severozapadu padinama planine Gramade kroz selo Klisuru. Kod sela Strazimirovci prelazi u susednu državu Bugarsku, prolazi kroz Trnovsko ždrelo i zatim se ponovo vraća u Srbiju nedaleko od sela Petačinci. Uliva se kod sela Gradište u Nišavu. Ukupna dužina ove reke je 72.1 km od toga je 45.1 km formirala na teritoriji Srbije a preostali deo pripada Bugarskoj. Posmatrajući površine sliva nešto manje od 50 % pripada ...
    klimatske promene, režim reke, monitoring, međugranična saradnja, Jerma

  • Analiza uslova formiranja oticaja reke Resave (istočna Srbija)

    Vesna Ristić Vakanjac, Marina Mitrašinović, Veljko Marinović, Saša Milanović, Ljiljana Vasić, Branislav Petrović, Petar Vojnović (2023)
    Reka Resava zbog veličine sliva i količine vode koju daje Velikoj Moravi predstavlja jednu od najznačajnijih njenih desnih pritoka. U okviru njenog sliva jasno se izdvajaju gornji, geomorfološki raznolik deo sliva, koji je uglavnom izgrađen od karbonatnih sedimenata, i donji deo koji pripada Velikomoravskom basenu. Proticaj reke Resave se beleži u profilima Manastir Manasija koji kontroliše gornji deo sliva u iznosu od 358 km2 i Svilajnac, koji se nalazi na oko 3.5 km pre njenog ušća i koji kontroliše ...

  • Hidrogeoekološki aspekti aksploatacije uglja u Pelagonijskom basenu (Makedonija)

    Kostadin J. Jovanov (2016-06-24)
    Leţišta uglja „Suvodol“, „Brod-Gneotino“ su u eksploataciji, a leţište uglja „Ţivojno“je u fazi pripremi. Nalaze se u krajnjem jugoistočnom i juţnom delu Pelagonijskekotline. Sva tri leţišta stvorena su u neogenim sedimentima u jezerskim uslovimasedimentacije u zoni kontakta sa prekambrijumskim kristalastim stenama. Kod sva trileţišta ugalja se javljaju više slojeva različite debljine, u okviru kojih se nalaze klastičnisedimenti (gline, peskovi i dr.). U podini ugljenog basena nalaze se kristalaste steneprekambrijumske starosti.Teren u okolini leţišta uglja karakteriše se umereno kontinentalnom klimom, ...
    ugalj, podzemne vode, površinske vode, neogeni kompleks, izdani,transmisibilnost, nivo podzemne vode, sniţenje nivoa
    ... hydro geographic network, contaminated water, air and land, change of regimes and surface water as well as modifications in the flora and fauna. The analyses of the balance of water in coal deposit “Suvodol” established that the recharge of ground water in the upper interlayer aquifer (MI1) is ...
    ... mining activities, water quality and taking certain measures during the closing, conservation of mining works and re-cultivation of terrain (closing and forestation coal slope, management of space and the bay surrounding water areas). Key words: coal, ground water, surface water, Neogene complex ...
    ... Ground water Flow Models in Open Pit Mining: Can We Do Better?Mine Water Environ, pp. 187-190). 8. Bukowski P, Bromek T, and Augustyniak I, 2006: Using the DRASTIC System to Assess the Vulnerability of Ground Water to Pollution in Mined Areas of the Upper Silesian Coal Basin. Mine Water and the ...

  • Synergy between the mineral deposit exploration and geothermal resources assessment on the example of "Valjevo" boron and lithium deposit in Serbia

    Nebojša Atanacković, Vladimir Živanović, Ana Vranješ, Sava Magazinović, Marinko Toljić, Ana Arifović, Branislav Potić (2023)
    Exploration of mineral deposits involves a collection of vast data sets on geological characteristics of the area. These data can largely contribute to the assessment of the geothermal potential, which can lead to an increase in the share of geothermal resources in the energy mix of the extractive industry and the local community. On the example of the "Valjevo" B-Li deposit, data on structural settings and previous hydrogeological investigations were combined with the results of resource drilling and geophysical ...
    Geothermal assessment, Mineral deposit exploration, Geothermal potential, Serbia
    ... outcrop on the surface. 7,410,000 7,412,000 7,414,000 „420, a w 7,424,000 7,426,000 7,428,000 7,430,000 » A NZ ELB drillhole 4, 91 0, 00 0 Water temperature *C 11 - 20 e 21-30 e 31-40 4, 90 8, 00 0 Cross section line 4, 90 6, 00 0 -| š 4, 90 2, 00 0 4, 90 0, 00 0 Figure ...
    ... significant karst aquifer is formed on the basin's southern margin, with groundwater from the middle Triassic limestone being utilized for the public water supply of Valjevo, Mionica and surrounding settlements. Karst groundwater under artesian pressure and elevated temperatures (17–37 "C) are taped with ...
    ... Existing data indicate that the limestones of the Middle Triassic are characterized by a significant degree of karstification and that they are more water-bearing than compared to the Lower Triassic. However, to consider the geothermal potential, the Triassic sediments are interpreted as a unique carbonate ...

  • Groundwaters of the "Valjevo karst" area (Western Serbia)

    Petar Dokmanović, Veljko Marinović (2021)
    “Ваљевски карст” је подручје кoje заузима површину од око 780 km2, док откривени кречњак чини око 330 km2. Припада Унутрашњим Динаридима западне Србије. У литостратиграфском погледу доминирају карстификовани кречњаци средњег и горњег тријаса у којима су формиране карстне издани. Анализирани су и систематизовани доступни подаци хидрогеолошких и других релевантних истраживања. Приказана је разграната мрежа траса подземних вода између понора и дренажних пунктова, као и главне карактеристике шеснаест карстних врела (или „разбијених“ дренажних зона) и девет (група) бунара, подељених ...
    карстнa издан, трасе подземних вода, извори, бунари, издашност, вишенаменско коришћење.

  • Kinetics, mechanism, and equilibrium studies of the reactions between a ruthenium(II) complex and some nitrogen- and sulfur-donor nucleophiles

    Aleksandar M. Mijatović, Ratomir M. Jelić, Jovana Bogojeski, Živadin D. Bugarčić, Biljana Petrović (2013)
    Kinetika i mehanizam reakcija supstitucije između [Ru(trpi)(bpi)Cl]+ sa nukleofilima gvanozin-5′-monofosfatom, L-histidinom, tioureom i dimetilsulfoksidom proučavani su spektrofotometrijski u 0,1 M NaClO4 na 310 K. Red reaktivnosti za odabrane ligande je: tiourea > gvanozin-5′-monofosfat > L-histidin > DMSO. Ovaj red je povezan sa elektronskim, strukturnim i hemijskim karakteristikama kompleksa i nukleofila. Reakcija supstitucije sa tioureom je proučavana na tri različite temperature (288, 298 i 310 K). Negativna entropija aktivacije DS = potvrđuje asocijativni način aktivacije. Formiranje kompleksa [Ru(trpi)(bpi)H2O]2+ sa ligandima ...
    Kinetika, Ravnoteža, Ru(II), L-Histidin, Guanozin-5' -monofosfat, Dimetilsulfoksid, Tiourea
    ... reactions 1495 123 atmosphere during the titrations, was purified by passing it through 10 % NaOH, then 10 % H2SO4, and finally dis- tilled water. Ultrapure water was used for preparation of all solutions. Preparation of the complexes The complex [Ru(trpy)(bpy)Cl]Cl was prepared according to the published ...
    ... various acid-base models. The best model, selected according to the above-mentioned method of calculation, was consistent with the deprotonation of water molecules and formation of hydroxo and l-hydroxo complexes, as given in Eqs. (2–4). The calculated values of hydrolysis constants are given in Table ...
    ... various acid-base models. The best model, selected according to the above-mentioned method of calculation, was consistent with the deprotonation of water molecules and formation of hydroxo and p-hydroxo complexes, as given in Eqs. (2-4). The calculated values of hydrolysis constants are given in Table ...

  • Vodosnabdevanje podzemnim vodama u Srbiji-stanje i perspektive

    Dušan Polomčić, Zoran Stevanović, Petar Dokmanović, Petar Papić, Vesna Ristić-Vakanjac, Bojan Hajdin, Saša Milanović, Dragoljub Bajić (2011)
    ... Groundwater Use for Belgrade’s Water Supply, Conference: Groundwaters as Sources of Water Supply, Association for Water Technology and Sanitary Engineering, 191-218, Belgrade 2. Dimkić, D., Je%ić, G., Dimkić, M., Soro, A., (2003): �e Krupac Spring hydraulic potential for water supply requirements of the ...
    ... Stevanovic, Z., Jemcov, I., Milanovic, S., Dokmanovic, P., Hajdin, B. (2005): Management of Karst Aquifers in Serbia for Water Supply – Achievements and Perspectives, In : Water resources and environmental problems in karst, Proceedings of the IAH Conf. KARST 2005, Stevanovic, Z. and Milanovic, P ...
    ... the city of Niš, XXX IAHR Congress, �eme B: Urban and Rural Water Systems for Sustainable Development, �essaloniki, Greece, pps. 653-660, August 2003 3. Dimkić M., Stevanović Z., Djurić D., (2011): Progress and improvement of the status of groundwater in Serbia, Proceedings of IWA Specialist Groundwater ...

  • Validation of vulnerability assessment by means of the Time Dependent, Model: case study from the Slovenian karst catchment

    Vladimir Živanović, Nataša Ravbar, Igor Jemcov (2019)
    Groundwater vulnerability assessment methods are continuously being developed and existing methods are very often modified to provide better simulation of natural protection conditions and more objective results. Most frequently used methods are based on calculation of predefined parameters influencing water infiltration and underground flow, which can often lead to bias conclusions related to vulnerability evaluations. Some other methods, like the Time Dependent Model (TDM) are based on an approach, where parametrization is obtained at the final stage of the ...
    Ocena ranjivosti podzemnih voda, karstne podzemne vode, TDM metoda, delineacija sanitarnih zona, Slovenački karst

  • Mikroelementi u kvartarnim sedimentima i lignitu Kostolačko-kovinskog ugljonosnog basena, istočna Srbija – odabrani primeri

    Bogoljub Vučković, Biljana Radovanović, Dragana Životić (2022)
    Sadržaj, distribucija i način pojavljivanja elemenata u tragovima (mikroelemenata), posebno potencijalno toksičnih i radioaktivnih elemenata u uglju, su od velikog značaja, posebno ako se koriste kao gorivo u termoelektranama (TE). Na osnovu sistematski prikupljenih podataka o elementima u tragovima u uglju, zemljištu i sedimentima, moguće je utvrditi stepen zagađenosti vazduha, zemljišta, vode, kao i negativan uticaj na zdravlje ljudi. Eksploatacija i istraživanje lignita u Kostolcu i Kovinu traje više od jednog veka, dok se sagorevanje lignita sa površinskih kopa ...
    mikroelementi, sedimenti, lignit, Kostolac

  • Late and post-collisional tectonic evolution of the Adria-Europe suture in the Vardar Zone

    Emő Márton, Marinko Toljić, Vesna Cvetkov (2022)
    The Vardar Zone is a product of the Triassic-Jurassic opening of the Neotethys, Jurassic obduction, Late Cretaceous/Paleogene consumption of the oceanic crust and continental collision. During the last process, the Eastern Vardar Zone was thrust over the Central and eventually both onto the Western Vardar Zone. The present paleomagnetic and structural study provided new results from the first two zones in the Belgrade area. The younger set of data, together with published ones from the third zone, provide firm ...
    Adria–Europe suture, Vardar Zone, Paleomagnetism, Thrusting, Vertical axis rotation

  • Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite

    Philippe Colomban, Aleksandar Kremenović (2020)
    Asbestos-containing pottery shards collected in the northeast of Corsica (Cap Corse) and dating from the 19th century, or earlier, have been analyzed by SEM-EDS, XRPD, FTIR and Raman microspectroscopy. Blue (crocidolite) and white (chrysotile) asbestos fiber bundles are observed in cross-sections. Most of the asbestos is partly or totally dehydroxylated, and some transformation to forsterite is observed to occur, indicative of a firing above 800 C. Examination of freshly fractured pieces shows a nonbrittle fracture with fiber pull-out, consistent with ...
    asbestos, CMC, Corsica, fiber, pottery
    ... samples, and the lowest water content is also found for these samples (measured by the lower intensity of the 3200 cm—! broad band). The 3400 cm-! component may arise from the clay-based matrix [45] being, more or less transformed by the firing. We can expect that the lowest water content is related ...
    ... very specific and fit well with asbestos. On the contrary, the broad O-H band peaking at ~3400 cm~! with a d shoulder at 3200 cm~! is assignable to water traces adsorbed at the pore surface, as observed for many ceramics. Materials 2020, 13, 3597 5of 18 Figure 2. SEM micrographs showing;, asbestos ...
    ... visible on the cross-section. Details for the spectrum of sample a are given on the bottom (B). Materials 2020, 13, 3597 11 of 18 3.4. OH Groups, Water and Clays Modes characteristic of O-H vibrations are only detected in grain cores (Figure 9), which is ascribed the de-hydroxylation induced by ...

  • Selection of Artificial Lift Methods: A Brief Review and New Model Based on Fuzzy Logic

    Miroslav Crnogorac, Miloš Tanasijević, Dušan Danilović, Vesna Karović Maričić, Branko Leković (2020)
    Artificial lift methods have applications in oil wells where oil production is no longer possible due to natural reservoir energy, so this necessary energy is added by introducing lift methods. In order to achieve optimum production, the selection of an artificial lift method is very important. This paper uses fuzzy logic as a mathematical and conceptual model for selection of the optimal artificial lift method. The outcome or IF-THEN rules, as the central part of the model, is based ...
    mehaničke metode, proizvodnja nafte, fazi logika, donošenje odluka, optimizacija
    ... amount of paraffin in the production fluid, the number of artificial methods that can be used is reduced. Parameter C5 represents water cut. With the increase in water in the production fluid, methods that can produce larger quantities of fluid are more widely used. 3.2. Synthesis Part of the Model ...
    ... • Production operating problem parameters (C), which are: (C1) corrosion, (C2) solid particles, (C3) gas oil ratio—GOR, (C4) paraffin, and (C5) water cut. Figure 1 shows the conceptual model of an expert system for optimized selection of an artificial lift method evaluation on the base of fuzzy ...
    ... viscosity 2–681 mPas well deviation 0–35 ° share of corrosive substances 0–5 % solid particle content 0–16 % GOR 10–458 m3/m3 paraffin share 0–20 % water content 0–93 % forms of energy and source 8–9 grade possibility of service 5–7 grade possibility of automatic regulation and remote control 4–9 ...

  • New data from the Lower Cretaceous carbonate platform deposits of Dimitrovgrad section (Southeastern Serbia)

    Jelena Stefanović, Bojana Džinić, Giovanna Della Porta, Dejan Radivojević (2021)
    Lower Cretaceous, facies analyses, limestones, Getic, Serbia, carbonate platform
    ... area of Getic unit defined Beriasian, Valanginian, Hauterivian and Urgonian like facies. These deposits result from the continuous trend of shallow- water sedimentation that started in the Middle Jurassic time. Recent studies on the Getic carbonate platform succession focused on outcrops in Romania and ...

  • Ефикасност дистрибуције и коришћења природног гаса у домаћинствима

    Dejan Brkić (2010-03-30)
    Природни гас ће се у будућности све више користити као енергент за подмиривање грејних потреба становништва у српским градовима. Стога је потребно изнаћи најповољнији начин употребе природног гаса. Природни гас се може користити за подмирење грејних потреба становништва на два дијаметрално супростављена начина, и то директно, тако што би се гас директно уводио у зграде путем дистрибутивног система за снабдевање гасом и затим сагоревао у гасном котлу којим је сваки стан опремљен (гасни дистрибутивни систем), или индиректно, тако што ...
    prirоdni gаs, distribuciја gаsа,grејаnjе, cеvоvоdi, cеvоvоdnе mrеžе,fаktоr trеnjа pri prоtоku fluidа,urbаnizаm
    ... ate hydraulics. Proceedings of the 2004  World Water and 23 Environmetal Resources Congress: Critical Transitions in Water and  Environmetal Resources Management 3108‐3115. (на енглеском)  150. Huei‐Chu, L., Tsai‐Feng, C. 2002. Space‐heating and water‐heating energy demands of  the aged in the US.  ...
    ... 276. Todini, E. 2000. Looped water distribution networks design using a resilience index based  heuristic approach. Urban Water 2(2), 115–122. (на енглеском)  277. Todini, E. 2006. On the convergence properties of the different pipe network algorithms.  8th Annual Water Distribution Systems Analysi ...
    ...  1290‐1300. (на енглеском)  56. Brkić, D. 2009g. Similarities and Differences in Optimization of Water‐ and Gas‐  Distribution Pipeline Networks, Dubrovnik Conference on Sustainable Development of  Energy, Water and Environment Systems (2009) научни скуп у организацији UNESCO  (United Nation Education,  ...

  • Ефикасност дистрибуције и коришћења природног гаса у домаћинствима

    Dejan Brkić (2010-03-30)
    Природни гас ће се у будућности све више користити као енергент за подмиривање грејних потреба становништва у српским градовима. Стога је потребно изнаћи најповољнији начин употребе природног гаса. Природни гас се може користити за подмирење грејних потреба становништва на два дијаметрално супростављена начина, и то директно, тако што би се гас директно уводио у зграде путем дистрибутивног система за снабдевање гасом и затим сагоревао у гасном котлу којим је сваки стан опремљен (гасни дистрибутивни систем), или индиректно, тако што ...
    prirоdni gаs, distribuciја gаsа,grејаnjе, cеvоvоdi, cеvоvоdnе mrеžе,fаktоr trеnjа pri prоtоku fluidа,urbаnizаm
    ... ate hydraulics. Proceedings of the 2004  World Water and 23 Environmetal Resources Congress: Critical Transitions in Water and  Environmetal Resources Management 3108‐3115. (на енглеском)  150. Huei‐Chu, L., Tsai‐Feng, C. 2002. Space‐heating and water‐heating energy demands of  the aged in the US.  ...
    ... 276. Todini, E. 2000. Looped water distribution networks design using a resilience index based  heuristic approach. Urban Water 2(2), 115–122. (на енглеском)  277. Todini, E. 2006. On the convergence properties of the different pipe network algorithms.  8th Annual Water Distribution Systems Analysi ...
    ...  1290‐1300. (на енглеском)  56. Brkić, D. 2009g. Similarities and Differences in Optimization of Water‐ and Gas‐  Distribution Pipeline Networks, Dubrovnik Conference on Sustainable Development of  Energy, Water and Environment Systems (2009) научни скуп у организацији UNESCO  (United Nation Education,  ...

  • Agates of the Lece Volcanic Complex (Serbia): Mineralogical and Geochemical Characteristics

    Zoran Miladinović, Vladimir Simić, Nenad Nikolić, Nataša Jović Orsini, Milena Rosić (2024)
    Agate veins and nodules occur in the Lece Volcanic Complex (Oligocene-Miocene) situated in the south of Serbia and occupying an area of 700 km2. This volcanic complex is composed predominantly of andesites, with sporadic occurrences of andesite-basalts, dacites and latites, and features agate formations that have been very little investigated. This study focuses on five selected agate occurrences within the Lece Volcanic Complex, employing optical microscopy, scanning electron microscopy (SEM), X-ray powder diffraction analysis, inductively coupled plasma mass spectrometry ...
    Lecki vulkanski kompleks, andeyit, kalcedon, kvarc, opal-CT, mikrostruktura, organska materija

  • Towards Better Valorisation of Industrial Minerals andRocks in Serbia—Case Study of Industrial Clays

    Vladimir Simić, Dragana Životić, Zoran Miladinović (2021)
    Management, Monitoring, Policy and Law,Nature and Landscape Conservation
    ... exploitation re- serves are mostly balanced reserves minus losses during exploitation and, occasionally, further reduced by the average percent of waste material that cannot be sold. Moreover, balanced reserves in Serbia, as already explained, may include A + B + C1 reserves, or even only C1 reserves ...
    ... may ask for a de- tailed regulation plan, particularly if the exploration target is close to some category of protected area or vulnerable area (water courses and vicinity of populated areas). The total procedure to obtain all permits related to exploration is usually 1–6 months depend- ing on required ...
    ... tory documents—approval of reserves and reclamation/recultivation project—must be submitted to the ministry in charge of agriculture, forestry, and water management. After the approval from the Ministry, necessary changes are made at the municipal level. Summarising the actual land use change procedures ...

  • Mineralogical analysis of a clay body from Zlakusa, Serbia, used in the manufacture of traditional pottery

    Maja Milošević, Biljana Đorđević, Mihovil Logar (2020)
    калцит, сирова глина, традиционална керамика, Злакуса
    ... 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 ...
    ... Joussein et al, ; Milošević & Logar, 146 Iron minerals (goethite and limonite) and halloysite Dehydration of adsorbed and intralayer water 0 100 200 Fig. 5. DTA of the investigated CIMx and CIBd samples. Fig. 6. Ternary diagram of the investigated samples showing the particle- size ...
    ... 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; Foldvari, 2011; ...