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Упит dcterms_subject_txt:flotation waste water

615 items

  • A hybrid model for forecasting groundwater levels based on fuzzy C-mean clustering and singular spectrum analysis

    Polomčić Dušan, Gligorić Zoran, Bajić Dragoljub, Cvijović Čedomir (2017)

  • The influence of Al<sup>3+</sup>ion on porcine pepsin activity<i>in vitro</i>

    Vesna M. Pavelkić, Kristina R. Gopcević, Danijela Z. Krstić, Marija A. Ilić (2008)
    The in vitro effect of Al3þ ions in the concentration range 1.7·1026M–8.7·1023M on pepsin activity at pH 2, via kinetic parameters and its electrophoretic mobility was evaluated. Kinetic study demonstrated the existence of an activation effect of Al3þ at pH 2 on pepsin molecule. Kinetic analysis with respect to concentrations of haemoglobin showed that Al3þ ions increase the maximal velocity (Vmax) and kcat values rather than apparent affinity for substrate (KS) implying the non-competitive nature of activation which indicated ...
    Пепсин, алуминијум, кинетика, активација, електрофоретска мобилност
    ... 8% of the earth”s crust; its concentration in living system is very low. Aluminium can occur in a number of different forms in water, and his chemistry in water solutions is very complex where many chemical parameters, including pH, determine which aluminium species are present in aqueous ...
    ... solutions. Aluminium enters the human body from foods, particularly those containing aluminium compounds used as food additives and from drinking water. An additional source of aluminium is Al-containing antacids that have been widely used in therapy for dyspepsia. Average daily dietary aluminium ...
    ... dialysed against 50mL AICI5·6H»O solution (0.01 M pH 2), for 36h at 4"C with gently stirring. All solutions were prepared in distilled-deionised water. Dialysis bags were prepared by boiling and rinsing in distilled-deionised RIGHTSLIMKMK&~Ž --| zj g s = 6 = || Fa Š F1 || -| |-s} ...

  • Природни потенцијал минералних вода Србије - Natural potential of mineral waters in Serbia

    Оливера Крунић (2021)
    минералне воде

  • Application of a Complex Hydrodynamic Analysis in Assessing the Feasibility of Increasing Source Yield: Case Study of Podrum Palic (Serbia)

    Polomčić Dušan, Parlić Srđan, Ristić-Vakanjac Vesna (2010)

  • Adaptation and migration measures for sustainable use of karst groundwater as a response on climate change - Eastern Serbia case example

    Stevanović Zoran, Dokmanović Petar, Milanović Saša, Ristić-Vakanjac Vesna, Polomčić Dušan, Vasić Ljiljana (2013)

  • Late Triassic radiolarians from the Grivska formation, internal Dinarides, SW Serbia

    Nikita Bragin, Liubov Bragina, Nevenka Đerić, Nataša Gerzina-Spajić (2019)
    Paleontology, Stratigraphy, Economic Geology, Geochemistry and Petrology, Geology, Geophysics, Geotechnical Engineering and Engineering Geology
    ... diluted (10%) hydrofluoric acid (HF) following the method by PESSAGNO & NEWPoORT, 1972 and DUMITRICA, 1970, residues were washed by water, then cleaned by hot water (10—15 g) with 0.5 g tetra- sodium pyrophosphate (Na„,P.,O,) to remove clay par- ticles. Radiolarians were picked from dried residues ...
    ... Grivska Group, which comprises different Middle and Late Triassic hemipelagic bedded cherty limestones with layers of calciturbidites with shallow-water debris. Later, GAWLICK et al. (2016, 2017) and SUDAR & GAWLICK (2018) revised the Grivska Formation using new biostratigraphic and microfacial ...
    ... slope (Grivska Formation) and the outer shelf region (Hallstatt facies) are found only in sedimentary mć- langes and are incorporated in the deep-water troughs in front of an advancing nappe stack. The thrust sheets ofthe former passive margin were suc- cessively fragmented and incorporated into ...

  • Upper Miocene depositional environments of the Kikinda-Mokrin High (Serbia)

    Saša Ivanišević, Dejan Radivojević (2018)
    Exploration for oil and gas in mature areas, such as the Pannonian Basin, can benefit from reexamination of old data using more advanced modern workflows that focus on the temporal and spatial aspects of sediment deposition. Specifically, we apply a new environment of deposition model that interprets the Upper Miocene- Pliocene sediments as being deposited in a rapidly filling basin characterized by quick shelf edge progradation from the northwest toward the southeast. Reconstruction of this shelf edge trajectory reveals ...
    naftna geologija, depozicione sredine, formacije, Panonski basen

  • State and perspective of individual household heating in Serbia: A survey-based study

    Boban Pavlović, Dejan Ivezić, Marija Živković (2021)
    This paper presents the results of the household survey on individual household heating systems in Serbia. The survey was conducted in the period October to December 2020 with the participation of 1100 households with individual household heating systems. The information collected in the questionnaire can be separated into three main parts: basic household data, current heating system characteristics, and households’ perceptions and attitudes. The survey results provide unique and comprehensive information concerning individual household heating systems and the main ...
    Domaćinstva, Individualni sistemi grejanja, Korišćenje energije, Stavovi potrošača, Anketa, Srbija

  • DFT study of free radical scavenging activity of erodiol

    Zoran Marković, Jelena Đorović, Milan Dekić, Milanka Radulović, Svetlana Marković, Marija Ilić (2013)
    Antioxidant activity of erodiol was examined at the M05-2X/6-311+G(d,p) level of theory in the gas and aqueous phases. The structure and energy of radicals and anions of the most stable erodiol rotamer were analyzed. To estimate antioxidant potential of erodiol, different molecular properties were examined: bond dissociation enthalpy, proton affinity together with electron transfer energy, and ionization potential followed by proton dissociation enthalpy. It was found that hydrogen atom transfer is the prevailing mechanism of erodiol behavior in gas; ...
    депсиде, еродиол, механизми за уклањање слободних радикала, БДЕ, ИП, ПА

  • A hundred years of Milutin Milanković's climate change theory - geological implications

    Dejan Radivojević (2020)
    Миланковићева теорија циклуса објављена пре сто година је најважнија теорија у наукама које проучавају климу и имала је велики утицај на дисциплине које се баве Земљом. Ипак, његов рад је чекао више од педесет година да би добио потврду. Може се рећи да Миланковићев рад највећи утицај на геологију има у изради астрономске временске скале, подршци хипотези континенталног дрифта и палеоклиматологији. Добри резултати примене астрономске временске скале на неогене седименте иницирали су примену ове методе у мезозојским и у последње ...
    циклостратиграфија, астономска временска скала, геолошка временска скала, климатске промене, континентални дрифт
    ... tarctic Circumpolar Current (A.C.C.) prevents warm water from the rest of Earth’s oceans to reach Antarctica (Fig. 9). This seems to have played a key role in the formation of the icehouse due to the up- welling of cold water from the deeper parts of the water column that aided the formation of ice sheets ...
    ... (precession, obliquity, and eccentricity) with periods ranging from 20 to 400- kyr (Fig. 2). Those phenomena initiated the changes in the climate, ocean water circulation, sedimentation rates and life conditions of the biosphere which could be potentially preserved within the sedi mentary record. Except them ...
    ... maximum) (roUTlEdGE, 2013, http://www.alpineanalytics.com/Climate/deepTime.html, left). The Antarctic Circumpolar Current (red arrows) prevents warm water from the rest of Earth’s oceans from getting close to Antarctica (right, EArlE, 2015). tack and were forced to adapt to the new business conditions ...

  • High-resolution sequence stratigraphy of carbonates - theory and examples

    Jelena Stefanović, Dejan Radivojević (2020)
    Циљ рада је да кроз теоријски аспект и примере примене представи секвенциону стратиграфију високе резолуције карбонатних седимената. У том смислу први део се односи на појам и значење високе резолуције у секвенционој стратиграфији. Од временских и просторних скала које одговарају сеизмичким профилима у последњих двадесет година метода је нашла примену на скалама које одговарају бушотинским подацима или изданцима. Као најпогоднији седименти за овај тип истраживања су се показали карбонати јер су осетљиви на еустатичке промене, а основе секвенционе стратиграфије ...
    изданак, системска група, јура-креда, карбонатна платформа, плитководна средина
    ... карбоната, минералног састава, дубине и потенцијала раста могу се разликовати три типа „карбонатних фабрика“: Т (tropical и top-of-the-water-column), C (cool water и controlled precipitation) и М (mud-mount, micrite и microbes) тип. Појам карбонатне платформе обухвата све појаве дебелих маса пл ...
    ... Jurassic-Cretaceous carbonates deposited on Tethyan platforms. Key words: outcrop, systems tract, Jurassic-Cretaceous, carbonate platform, shallow-water environment 1 Универзитет у Београду, Рударско-геолошки факултет, Каменичка 6, Београд; ...
    ... BONVALLET, L., ARNAUD-VANNEAU, A., ARNAUD, H., ADATTE, T., SPANGENBERG, J., STEIN, M., GODET, A. & FÖLLMI, K. 2019. Evolution of the Urgonian shallow-water carbonate platform on the Helvetic shelf during the late Early Cretaceous. Sedimentary Geology. 387. 10. pp.18-56. BOVER-ARNAL, T., SALAS, R. ...

  • Linear-motor plunger pump increases lifting efficiency

    Bojan Martinović, Dušan Đekić, Dušan Danilović, Pavel Isaev (2022)
    plunger, linear, motor, pumps

  • Дефинисање геотехничких параметара еолских седимената земуснког платоа на основу лабораторијских и теренских SPT испитивања

    Ђорђе Крзман (2024)
    Циљ овог рада је био да се одреде геотехничке караткеристике предметног терена што представља полазну основу за рационално пројектовање и градњу. Истражним бушењем утврђено је да предметни терен изграђују четри лесна хоризонта и три слоја погребене земље до дубине од 22-23 m. Лабораторијским испитивањем добијени су ефективни параметри смичуће чврстоће, где се кохезија најчешће креће између c’=14 и 18 kPa, а угао унутрашњег трења f'= 25 - 30 °. Теренска SPT испитивањем уз коришћење прихваћених корелација у геотехничкој пракси ...
    лес, лабораторија, SPT, корелације, параметри
    ... concretions and Fe hydroxide, dark yellow to brown in color. Marsh clays appear in the- t a y periormec interlayers, more compressible, saturated wilh water, dark gray in color. ih ground" levali ly performed Tipauia nocionnra [ARyBVIJATHE HACTTATE ((pauuja nononiea): Tipauiia necosnra o necax npauinacr ...
    ... 36ujewa, cpe/iyee Ro cnaGo Bononponyca, | crernocuehe 6oje. Ć |ALLUVIAL DEPOSITS (food facies): Sandy sit to sify sand (ML/SM), low plasticity, water-saturated, more Merpaxa Gyuionaka sa Merpo crastuy |- compressible, britle, poorly compacted, medium to low permeable, light brown in color. OOM Tepela ...
    ... HoBOWaBe/neH KB AP TA P- XO RO LE H- Q. OU AT ER NA RY - HO LO CE NE - O , - P Č — . — — — Haao noa3eme Bone Ground water table 'SDMT onur ca koToM L4 LA 3 —— c e i de as a y — a — NE O = O EPTa- 8 v a t m ; WO}L_a t : t O EPw=6 BW%_B Ta . - } 7 g . (gs,30) O ...

  • Multihazard Exposure Assessment on the Valjevo City Road Network

    Miloš Marjanović, Biljana Abolmasov, Svetozar Milenković, Uroš Đurić, Jelka Krušić, Mileva Samardžić Petrović (2019)
    Prirodni hazardi, izloženost, klizišta, poplave, bujice, GIS, R

  • Hidrogeohemija prirodnih radioaktivnih elemenata u podzemnim vodama Srbije

    Marina D. Ćuk (2018-02-23)
    Osnovni cilj doktorske disertacije predstavljao je definisanje prirodnih koncentracija (engl. background values) U, Th, i K u podzemnim vodama, i definisanje hidrogeohemijskih uslova koji utiču na distribuciju navedenih elemenata u podzemnim vodama...
    prirodni radioaktivni elementi, podzemna voda, geohemijske sredine, hidrogeohemijski uslovi, neparametarska statistička analiza, logistički model, hidrohemijsko modeliranje
    ... T. 1988. Estimation of descriptive statistics for multiply censored water quality data. Water Resources Research 24 (12): 1997-2004. 58. Helsel DR, Hirsch RM. 2002. Statistical Methods in Water Resources. Techniques of Water-Resources Investigations of the United States Geological Survey. Hydrologic ...
    ... andthorium in soil and water. Neth. J. Agric. Sci. 28: 40 – 62. 55. Harris DC. 2003. Quantitative Chemical Analysis. 6th ed. WH Freeman & Company, New York. 56. Helsel DR, Gilliom RJ. 1986. Estimation of Distributional Parameters for Censored Trace Level Water Quality Data. Water Resources Research ...
    ... 208:114 – 127. 71. ISO 10703. Water Quality – Determination of the activity concentration of radionuclides by high resolution gamma-ray spectrometry; 1997 (ISO TC 147/WG4). 72. ISO 9696. Water Quality – Measurement of Gross Alpha Activity in Non-saline Water-thick Source Method; 1992 (ISO/TC ...

  • Specific electrical conductivity in epikarst groundwater of the eastern Suva Planina mt.

    Branislav Petrović (2022)
    The epikarst is a part of the karst outcrop that is located within the unsaturated zone and represents a complex point of contact and mixing of unconsolidated material from the terrain surface. The correct and complete perception of epikarst, its degree of development and the presence on the limestone terrain can be achieved with a multidisciplinary approach. The study area for the applied multidisciplinary research was the Eastern part of karst massif Suva Planina Mt. One important part of ...
    epikarst, specifična električna provodljivost, Suva Planina, pećina Peč

  • Synthesis of MnCo2O4 nanoparticles as modifiers for simultaneous determination of Pb(II) and Cd(II)

    Vesna Antunović, Marija Ilić, Rada Baošić, Dijana Jelić, Aleksandar Lolić (2019)
    The porous spinel oxide nanoparticles, MnCo2O4, were synthesized by citrate gel combustion technique. Morphology, crystallinity and Co/Mn content of modified electrode was characterized and determined by Fourier transform infra-red spectroscopy (FT-IR), scanning electron microscopy (SEM), energy dispersive spectrometry (EDS), X-ray diffraction pattern analysis (XRD), simultaneous thermogravimetry and differential thermal analysis (TG/DTA). Nanoparticles were used for modification of glassy carbon electrode (GCE) and new sensor was applied for simultaneous determination of Pb(II) and Cd(II) ions in water samples with the ...
    MnCo2O4 nanočestice, modifikatori, određivanje Pb (II) and Cd(II)

  • Fluid inclusion study in quartz of the Rudnik Pb-Zn-Cu-Ag skarn deposit, Serbia

    Stefan Petrović, Ronald J. Bakker, Vladica Cvetković, Rade Jelenković (2023)
    Six types of fluid inclusions were identified in three growth zones of hydrothermal quartz from the Rudnik skarn deposit. In the core zone, primary two-phase fluid inclusions of high (type 1) and moderate salinity (type 2) homogenized to liquid between 350-430 °C and 340-420 °C, respectively. Raman analysis revealed that the vapour phases are a CO2-CH4 gas mixture, with a predominance of CO2. The core contains and dispersed vapour-rich fluid inclusions of low salinity (type 3) composed of CO2-CH4-H2S ...

  • Savremeni pristup rešavanja problema industrijskog otpada

    Mariја Bošković (2024)
    Rad ukazuje na savremene metode rešavanja problema industrijskog otpada, sa posebnim fokusom na pećnu prašinu koja nastaje tokom metalurških procesa, poput proizvodnje čelika u elektrolučnim pećima. U radu se detaljno razmatra hemijski sastav pećne prašine, koja sadrži teške metale poput cinka, olova i kadmijuma, i naglašavaju ekološki izazovi koje predstavlja njeno zbrinjavanje. Takođe, analiziraju se metode tretmana i valorizacije pećne prašine, uključujući pirometalurške i hidrometalurške procese, pri čemu je poseban akcenat stavljen na reciklažu cinka iz pećne prašine. Dalje, ...
    prašina, elektrolučna peć, cink, teški metali, reciklaža
    ... 'Ključne reči: pećna prašina, elektrolučna peć, cink, teški metali, reciklaža Summary: The paper highlights modern methods for addressing industrial waste, with a particular focus on furnace dust generated during metallurgical processes, such as steel production in electric arc furnaces. It provides ...
    ... reused in industry. Special attention is given to innovative methods that enhance the efficiency of recycling processes and reduce the amount of waste requiring permanent disposal. These methods contribute to more sustainable resource management and reduce the negative environmental impact. Key ...
    ... Key words: furnace dust, electric arc furnace, zinc, heavy metals, recycling Ovaj završni rad rađen Jje u okviru projekta ,, RIS-DustRec-II. Zero waste reprocessing of EAF and CF dust with competence build-up“, koji se finansira sredstvima EIT RawMaterials, tela EU, i u saradnji sa IKL- Industrijski ...

  • Prilog poznavanju režima voda reke Visočice

    Vesna Ristić Vakanjac, Jovan Nikolić, Marina Čokorilo Ilić, Dušan Polomčić, Dragoljub Bajić, Bojan Hajdin, Jelena Ratković (2018)
    Специфични геолошки и хидрогеолошки услови у области слива реке Височице, а пре свега широко распрострањење карбонатног средње тријаског комплекса стена, као и доњо тријаске шарене серије (алевролити, пешчари, конгломерати) имали су за последицу формирање специфичног типа дренажне мреже као и специфичног режима отицаја реке Височице и њених значајнијих притока. У конкретном случају, у горњим деловима слива ове реке као и њених главних притока, у оквиру доњо тријаских седимената развијен је дендритичан тип хидрографске мреже, док преласком на средње тријаске ...
    režim, specifični oticaj, Visočica