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Branislav Marković
Institute for Technology of Nuclear and Other Mineral Raw Materials, 11000 Belgrade, Serbia

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Journal article
Published: 31 August 2021 in Metals
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In order to reflect possible issues in future sole e-waste processing, an electrolyte of complex chemical composition reflecting system of sole e-waste processing was obtained by following a specially designed pyro-electrometallurgical method. The obtained non-standard electrolyte was further used for the purpose of comprehensive metal interference evaluation on the copper solvent extraction (SX) process. Optimization of the process included a variation of several process parameters, allowing determination of the effect of the most abundant and potentially the most influential impurities (Ni, Sn, Fe, and Zn) and 14 other trace elements. Moreover, comparing three commercial extractants of different active chelating groups, it was determined that branched aldoxime reagent is favorable for Cu extraction from the chemically complex system, as can be expected in future e-waste recycling. The results of this study showed that, under optimal conditions of 20 vol.% extractant concentration, feed pH 1.5, O/A ratio 3, and 10-min phase contact time, 88.1% of one stage Cu extraction was achieved. Co-extraction of the Fe, Zn, Ni, and Sn was under 8%, while Pb and trace elements were negligible. Optimal conditions (H2SO4 180 g/L, O/A = 2, and contact time 5 min) enabled 95.3% Cu stripping and under 6% of the most influential impurities. In addition, an impurity monitoring and distribution methodology enabled a better understanding and design of the process for the more efficient valorization of metals from e-waste.

ACS Style

Jovana Djokić; Dragana Radovanović; Zlatko Nikolovski; Zoran Andjić; Željko Kamberović. Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery. Metals 2021, 11, 1383 .

AMA Style

Jovana Djokić, Dragana Radovanović, Zlatko Nikolovski, Zoran Andjić, Željko Kamberović. Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery. Metals. 2021; 11 (9):1383.

Chicago/Turabian Style

Jovana Djokić; Dragana Radovanović; Zlatko Nikolovski; Zoran Andjić; Željko Kamberović. 2021. "Influence of Electrolyte Impurities from E-Waste Electrorefining on Copper Extraction Recovery." Metals 11, no. 9: 1383.

Journal article
Published: 30 August 2021 in Metals
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The roasting of sulfide ores and concentrates is one of the most important steps in pyrometallurgical metal production from primary raw materials, due to the necessity of excess sulfur removal, present in the virgin material. Pentlandite is one of the main sources for nickel pyrometallurgical production. The knowledge of its reaction mechanism, products distribution during oxidation and reaction kinetics is important for optimizing the production process. Raw pentlandite-bearing ore from the Levack mine (Ontario, Canada) was subjected to oxidative roasting in the air atmosphere. A chemical analysis of the initial sample was conducted according to EDXRF (Energy-Dispersive X-Ray Fluorescence) and AAS (Atomic Adsorption Spectrometry) results. The characterization of the initial sample and oxidation products was conducted by an XRD (X-ray Diffraction) and SEM/EDS (Scanning Electron Microscopy with Energy Dispersive Spectrometry) analysis. Thermodynamic calculations, a phase analysis and construction of Kellogg diagrams for Ni-S-O and Fe-S-O systems at 298 K, 773 K, 923 K and 1073 K were used for proposing the theoretical reaction mechanism. A thermal analysis (TG/DTA—Thermogravimetric and Differential Thermal Analyses) was conducted in temperature range 298–1273 K, under a heating rate of 15° min−1. A kinetic analysis was conducted according to the non-isothermal method of Daniels and Borchardt, under a heating rate of 15° min−1. Calculated activation energies of 113 kJ mol−1, 146 kJ mol−1 and 356 kJ mol−1 for three oxidation stages imply that in every examined stage of the oxidation process, temperature is a dominant factor determining the reaction rate.

ACS Style

Kristina Božinović; Nada Štrbac; Aleksandra Mitovski; Miroslav Sokić; Duško Minić; Branislav Marković; Jovica Stojanović. Thermal Decomposition and Kinetics of Pentlandite-Bearing Ore Oxidation in the Air Atmosphere. Metals 2021, 11, 1364 .

AMA Style

Kristina Božinović, Nada Štrbac, Aleksandra Mitovski, Miroslav Sokić, Duško Minić, Branislav Marković, Jovica Stojanović. Thermal Decomposition and Kinetics of Pentlandite-Bearing Ore Oxidation in the Air Atmosphere. Metals. 2021; 11 (9):1364.

Chicago/Turabian Style

Kristina Božinović; Nada Štrbac; Aleksandra Mitovski; Miroslav Sokić; Duško Minić; Branislav Marković; Jovica Stojanović. 2021. "Thermal Decomposition and Kinetics of Pentlandite-Bearing Ore Oxidation in the Air Atmosphere." Metals 11, no. 9: 1364.

Journal article
Published: 01 January 2021 in Podzemni radovi
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Sodium carbonate is a material that is very good sorbent of carbon dioxide from the atmosphere, and it is a reason of it is increasing importance in environmental protection. In order to improve it is sorption characteristics, activation of Na2CO3 was performed by mechanochemical procedure and monitoring of changes during the relaxation time. This research is based on differential thermal analysis with thermogravimetry, in order to determine the changes that occurred on the activated samples during the relaxation period under controlled conditions. Sodium carbonate was activated for 2 and 7 minutes in a vibro mill, and then the activated samples were deposited in at room temperature and atmosphere of carbon dioxide at a humidity of 95% for 96h.

ACS Style

Nataša G. Đorđević; Slavica R. Mihajlović; Gvozden B. Jovanović; Branislav R. Marković. DTA/TG analysis of mechanochemicaly activated sodium carbonate. Podzemni radovi 2021, 47 -55.

AMA Style

Nataša G. Đorđević, Slavica R. Mihajlović, Gvozden B. Jovanović, Branislav R. Marković. DTA/TG analysis of mechanochemicaly activated sodium carbonate. Podzemni radovi. 2021; (38):47-55.

Chicago/Turabian Style

Nataša G. Đorđević; Slavica R. Mihajlović; Gvozden B. Jovanović; Branislav R. Marković. 2021. "DTA/TG analysis of mechanochemicaly activated sodium carbonate." Podzemni radovi , no. 38: 47-55.

Journal article
Published: 01 January 2021 in Chemical Industry
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Microstructure assessment is crucial for the design and production of high-quality alloys such as cast aluminum alloy ingots. Along with the effect of a more homogeneous microstructure to result in much better mechanical properties, better as-cast alloy quality indicates a higher efficiency of the aluminum alloys production process. During the aluminum alloy solidification process many microstructural defects can occur, which deteriorate the mechanical properties and hence decrease the usability of such an ingot. Application of the electromagnetic field during the vertical continuous casting process significantly reduces occurrence of these defects. In the present study, EN AW 7075 alloy samples were cast with and without application of an electromagnetic field and examined regarding the microstructure, electrical conductivity, and changes in the phase composition. The obtained results clearly show that it is possible to decrease or avoid casting defects by the electromagnetic field application as verified by the microstructure characterization and quantification, electrical conductivity tests and differential thermal analysis (DTA).

ACS Style

Aleksandra Pataric; Marija Mihailovic; Branislav Markovic; Miroslav Sokic; Andreja Radovanovic; Branka Jordovic. Microstructure as an essential aspect of EN AW 7075 aluminum alloy quality influenced by electromagnetic field during continuous casting process. Chemical Industry 2021, 75, 31 -37.

AMA Style

Aleksandra Pataric, Marija Mihailovic, Branislav Markovic, Miroslav Sokic, Andreja Radovanovic, Branka Jordovic. Microstructure as an essential aspect of EN AW 7075 aluminum alloy quality influenced by electromagnetic field during continuous casting process. Chemical Industry. 2021; 75 (1):31-37.

Chicago/Turabian Style

Aleksandra Pataric; Marija Mihailovic; Branislav Markovic; Miroslav Sokic; Andreja Radovanovic; Branka Jordovic. 2021. "Microstructure as an essential aspect of EN AW 7075 aluminum alloy quality influenced by electromagnetic field during continuous casting process." Chemical Industry 75, no. 1: 31-37.

Journal article
Published: 01 January 2020 in Journal of Applied Engineering Science
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Today human society is already witnessing rapid depletion of non-renewable ore resources. As the distribution of raw material resources globally is very off-balance, and preassure on environment as the consequence of ore exploatation is not negligible, re-utilization and recycling of industrial side-streams gaining on importance. Finding new potentially anthropogenic resources of material (at first place critical raw materials) are inline with sustainable waste management goals, and in correlation with boundaries given by the circular economy principles. Side-streams from mines can become source for recovery of these materials. The aim of this paper was to analyze position of mining waste in correlation with circular economy principles, as well potential for implementation of them within extraction industry in the Republic of Serbia.

ACS Style

Nela Petronijević; Vesna Alivojvodić; Miroslav Sokić; Branislav Marković; Srđan Stanković; Dragana Radovanović. Sustainable mining towards accomplishing circular economy principles. Journal of Applied Engineering Science 2020, 18, 493 -499.

AMA Style

Nela Petronijević, Vesna Alivojvodić, Miroslav Sokić, Branislav Marković, Srđan Stanković, Dragana Radovanović. Sustainable mining towards accomplishing circular economy principles. Journal of Applied Engineering Science. 2020; 18 (4):493-499.

Chicago/Turabian Style

Nela Petronijević; Vesna Alivojvodić; Miroslav Sokić; Branislav Marković; Srđan Stanković; Dragana Radovanović. 2020. "Sustainable mining towards accomplishing circular economy principles." Journal of Applied Engineering Science 18, no. 4: 493-499.

Journal article
Published: 20 December 2019 in Metals
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Flotation tailings rich in carbonate minerals from the tailings deposit of the copper mine Majdanpek (Serbia) were applied for neutralization of the water taken from the extremely acidic Lake Robule (Bor, Serbia). Tests conducted in Erlenmeyer flasks showed that after neutralization of the lake water to pH 7, over 99% of aluminum (Al), iron (Fe), and copper (Cu) precipitated, as well as 92% of Zn and 98% of Pb. In order to remove residual Mn and Ag, the water was further treated with NaOH. After treatment with NaOH, all concentrations of the metals in the lake water samples were below discharge limits for municipal wastewater according to the national legislation of the Republic of Serbia. The results of this work suggest that mining waste could be used for active neutralization of the acid mine drainage. The use of the mining waste instead of lime could reduce the costs of the active treatment of the acid mine drainage.

ACS Style

Nela Petronijević; Srđan Stanković; Dragana Radovanović; Miroslav Sokić; Branislav Marković; Srećko R. Stopić; Željko Kamberović. Application of the Flotation Tailings as an Alternative Material for an Acid Mine Drainage Remediation: A Case Study of the Extremely Acidic Lake Robule (Serbia). Metals 2019, 10, 16 .

AMA Style

Nela Petronijević, Srđan Stanković, Dragana Radovanović, Miroslav Sokić, Branislav Marković, Srećko R. Stopić, Željko Kamberović. Application of the Flotation Tailings as an Alternative Material for an Acid Mine Drainage Remediation: A Case Study of the Extremely Acidic Lake Robule (Serbia). Metals. 2019; 10 (1):16.

Chicago/Turabian Style

Nela Petronijević; Srđan Stanković; Dragana Radovanović; Miroslav Sokić; Branislav Marković; Srećko R. Stopić; Željko Kamberović. 2019. "Application of the Flotation Tailings as an Alternative Material for an Acid Mine Drainage Remediation: A Case Study of the Extremely Acidic Lake Robule (Serbia)." Metals 10, no. 1: 16.

Journal article
Published: 30 October 2019 in Metals
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In ores, chalcopyrite is usually associated with other sulfide minerals, such as sphalerite, galena, and pyrite, in a dispersed form, with complex mineralogical structures. Concentrates obtained by flotation of such ores are unsuitable for pyrometallurgical processing owing to their poor quality and low metal recovery. This paper presents the leaching of chalcopyrite concentrate from the location “Rudnik, Serbia”. The samples from the flotation plant were treated with hydrogen peroxide in sulfuric acid. The influences of temperature, particle size, stirring speed, as well as the concentrations of hydrogen peroxide and sulfuric acid were followed and discussed. Hence, the main objective was to optimize the relevant conditions and to determine the reaction kinetics. It was remarked that the increase in temperature, hydrogen peroxide content, and sulfuric acid concentration, as well as the decrease in particle size and stirring speed, contribute to the dissolution of chalcopyrite. The dissolution kinetics follow a model controlled by diffusion, and the lixiviant diffusion controls the rate of reaction through the sulfur layer. Finally, the main characterization methods used to corroborate the obtained results were X-ray diffraction (XRD) as well as qualitative and quantitative light microscopy of the chalcopyrite concentrate samples and the leach residue.

ACS Style

Miroslav Sokić; Branislav Marković; Srđan Stanković; Željko Kamberović; Nada Štrbac; Vaso Manojlović; Nela Petronijević. Kinetics of Chalcopyrite Leaching by Hydrogen Peroxide in Sulfuric Acid. Metals 2019, 9, 1173 .

AMA Style

Miroslav Sokić, Branislav Marković, Srđan Stanković, Željko Kamberović, Nada Štrbac, Vaso Manojlović, Nela Petronijević. Kinetics of Chalcopyrite Leaching by Hydrogen Peroxide in Sulfuric Acid. Metals. 2019; 9 (11):1173.

Chicago/Turabian Style

Miroslav Sokić; Branislav Marković; Srđan Stanković; Željko Kamberović; Nada Štrbac; Vaso Manojlović; Nela Petronijević. 2019. "Kinetics of Chalcopyrite Leaching by Hydrogen Peroxide in Sulfuric Acid." Metals 9, no. 11: 1173.

Original article
Published: 12 July 2019 in Journal of Material Cycles and Waste Management
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Secondary alkaline lead slag (SALS), generated during lead–acid batteries recycling, is a hazardous waste due to its high reactivity, solubility, and migration of toxic elements. After pulverization caused by storage under atmospheric condition for 30 days, the SALS was sieved and coarse fraction (+ 1 mm) was returned to the recycling process. Finer fraction (− 1 mm) was treated by water leaching to remove soluble compounds. SALS compositions prior and after the pre-treatment and effects of liquid-to-solid ratio, stirring rate, and temperature on Na, S, Fe, As, and Pb leaching from SALS were analyzed. The results show that maximal leaching degrees were 95.78%, 75.32%, and 79.89% for Na, S, and As, respectively (20 l kg−1, 600 min−1, 333 K, 120 min). Leachability of Na and S from SALS was controlled by dissolution of Na2SO4 that could be recovered from leaching solution. Isothermal As leaching is described by diffusion mechanism with activation energy of 15.5 kJ mol−1. Insoluble Pb and Fe sulfates, sulfides, and oxides remained in the SALS. Pre-treated SALS, with reduced mass up to 32%, was solidified in cement matrix. The results of toxicity characteristic leaching procedure and unconfined compressive strength confirmed effectiveness of As removal from SALS by water leaching and Pb immobilization in cement matrix containing 20% of SALS.

ACS Style

Marija Štulović; Dragana Radovanović; Željko Kamberović; Marija Korać; Zoran Anđić; Milisav Ranitović. Leaching of toxic elements from secondary alkaline lead slag and stabilized/solidified products. Journal of Material Cycles and Waste Management 2019, 21, 1402 -1413.

AMA Style

Marija Štulović, Dragana Radovanović, Željko Kamberović, Marija Korać, Zoran Anđić, Milisav Ranitović. Leaching of toxic elements from secondary alkaline lead slag and stabilized/solidified products. Journal of Material Cycles and Waste Management. 2019; 21 (6):1402-1413.

Chicago/Turabian Style

Marija Štulović; Dragana Radovanović; Željko Kamberović; Marija Korać; Zoran Anđić; Milisav Ranitović. 2019. "Leaching of toxic elements from secondary alkaline lead slag and stabilized/solidified products." Journal of Material Cycles and Waste Management 21, no. 6: 1402-1413.

Journal article
Published: 05 June 2019 in International Journal of Environmental Research and Public Health
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Reuse of waste is one of the main principles of sustainable development and circular economy. Secondary alkaline lead slag is a hazardous waste generated in the recycling process of lead-acid batteries that may be suitable in construction materials. The environmental impact of the use of lead slag as a partial replacement of fine aggregates in the cement-based stabilization/solidification (S/S) process for the preparation of concrete was studied in this paper. Solidified products containing 10%, 15%, 20%, and 25% slag were laboratory tested by unconfined compressive strength (UCS) analyses and the Toxicity Characteristic Leaching Procedure (TCLP). At the same time, the leachability of toxic elements from solidified products with a high percent of slag was evaluated under environmental conditions for during one year. The results of the UCS and TCLP indicated that utilization of this type of slag in cement-based applications may be justified with its controlled addition. However, the described application of the slag was disputed due to the high release of As under high alkaline environmental conditions. Eh-pH analyses and the geochemical modeling using the software PHREEQC were evaluated, as well as the mechanism of pollutant (Pb, As) immobilization (precipitation, adsorption) as a function of pH conditions.

ACS Style

Marija Štulović; Dragana Radovanović; Željko Kamberović; Marija Korać; Zoran Anđić. Assessment of Leaching Characteristics of Solidified Products Containing Secondary Alkaline Lead Slag. International Journal of Environmental Research and Public Health 2019, 16, 2005 .

AMA Style

Marija Štulović, Dragana Radovanović, Željko Kamberović, Marija Korać, Zoran Anđić. Assessment of Leaching Characteristics of Solidified Products Containing Secondary Alkaline Lead Slag. International Journal of Environmental Research and Public Health. 2019; 16 (11):2005.

Chicago/Turabian Style

Marija Štulović; Dragana Radovanović; Željko Kamberović; Marija Korać; Zoran Anđić. 2019. "Assessment of Leaching Characteristics of Solidified Products Containing Secondary Alkaline Lead Slag." International Journal of Environmental Research and Public Health 16, no. 11: 2005.

Journal article
Published: 01 January 2019 in Chemical Industry
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Since commissioning in 1961, the copper mine Majdanpek, a part of the Mining and Smelting Complex Bor (RTB Bor), produced approximately 378 million tons of flotation tailings. Semi-quantitative mineralogical analysis of the flotation tailings revealed significant content of carbonate minerals (approximately 20-25 %), indicating high acid neutralization capacity. Also, approximately 70 % of copper is in the form of the oxide mineral cuprite (Cu2O). Copper can be easily leached from cuprite by using sulphuric acid. The RTB Bor copper smelter generates 8.7 m3h-1 of extremely acidic waste effluent (142.4 kgm-3 of sulphuric acid, pH -0.464) with relatively high concentrations of dissolved metals and metalloids (Cu, Fe, Zn, Pb and As). The effluent is currently treated with hydrated lime. The present study focused on application of flotation tailings as a neutralizing agent for acidic effluents. Laboratory experiments followed by computer simulation of the industrial process showed that 99% of the acid can be neutralized with flotation tailings in a series of six reactors resulting in the final copper concentration of 1.55 gL-1. Benefits of the proposed process are: lower environmental impact of the process and reduced costs of neutralization of the acidic effluent from the copper smelter.

ACS Style

Miroslav Sokic; Dragana Radovanovic; Branislav Marković; Jovica Stojanovic; Zeljko Kamberovic; Nela Petronijevic; Srđan Stanković. Treatment of the acidic effluent from a copper smelter by flotation tailings. Chemical Industry 2019, 73, 115 -124.

AMA Style

Miroslav Sokic, Dragana Radovanovic, Branislav Marković, Jovica Stojanovic, Zeljko Kamberovic, Nela Petronijevic, Srđan Stanković. Treatment of the acidic effluent from a copper smelter by flotation tailings. Chemical Industry. 2019; 73 (2):115-124.

Chicago/Turabian Style

Miroslav Sokic; Dragana Radovanovic; Branislav Marković; Jovica Stojanovic; Zeljko Kamberovic; Nela Petronijevic; Srđan Stanković. 2019. "Treatment of the acidic effluent from a copper smelter by flotation tailings." Chemical Industry 73, no. 2: 115-124.

Journal article
Published: 01 January 2018 in Chemical Industry
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This paper presents mineralogical and crystallographic characterization of the zeolitic tuff from the Novakovic deposit, Republic of Bosnia and Herzegovina. The zeolitic tuff is of a whitish color composed of Ca-clinoptilolite and an amorphous phase (volcanic glass and amorphous SiO2). The zeolitic tuff was analyzed by X-ray diffraction of the polycrystalline sample (XRPD), scanning electron microscopy and energy dispersive spectroscopy (SEM/EDS), and differential thermal and thermo- gravimetric (DTA/DTG) methods. According to the results obtained, it can be concluded that the studied zeolitic tuff is composed of Heu-type minerals. Based on the chemical analysis, thermal treatment and XRPD analysis it was determined that this is a mineral Ca-clinoptilolite. Thermal analysis in the temperature range from 300 up to 700?C showed that the examined zeolite minerals from the Novakovic deposit are stable up to the temperature of 600?C. The crystal structure of Ca-clinoptilolite has been refined in the centrosymmetric space group C2/m (S.G. 12) with disordered distribution of Al and Si in the tetrahedral framework. The unit-cell parameters are as follows: a = 17.662 ?, b = 17.874 ?, c = 7.402 ?, ? = 116.32? and V = 2122.73 ?3. The basic structural motif is represented by four channels. Three channels are composed of eight-membered rings, and one of ten-membered rings. The ten-membered (channel A) and one eight-membered channel (B) are parallel to the crystallographic axis c, and the other eight-membered channel is parallel to the a-axis. Ca-clinoptilolite comprises approximately 90 % of the studied zeolite tuff while the rest 10 % is the amorphous phase. The overall cation exchange capacity (CEC) amounts to 187 mmolM+/100g, and calcium represents the most abundant cation in the studied sample. The atomic ratios of Si/Al, Na+/(Na++K+), and Ca2+/(Ca2++Mg2+) are as follows: 4.36, 0.14, and 0.55, respectively. The zeolite tuff is both thermally and structurally stable and has applications in various areas of industry and agriculture.

ACS Style

Ana S. Radosavljević-Mihajlović; Aleksandra S. Daković; Vladan Kasic; Vojislav V. Mitić; Jovica N. Stojanović; Miroslav D. Sokić; Branislav Marković. Mineralogy and crystallographic properties of Heu-type zeolitic tuff from the Novakovic deposit, Bosnia and Herzegovina. Chemical Industry 2018, 72, 371 -382.

AMA Style

Ana S. Radosavljević-Mihajlović, Aleksandra S. Daković, Vladan Kasic, Vojislav V. Mitić, Jovica N. Stojanović, Miroslav D. Sokić, Branislav Marković. Mineralogy and crystallographic properties of Heu-type zeolitic tuff from the Novakovic deposit, Bosnia and Herzegovina. Chemical Industry. 2018; 72 (6):371-382.

Chicago/Turabian Style

Ana S. Radosavljević-Mihajlović; Aleksandra S. Daković; Vladan Kasic; Vojislav V. Mitić; Jovica N. Stojanović; Miroslav D. Sokić; Branislav Marković. 2018. "Mineralogy and crystallographic properties of Heu-type zeolitic tuff from the Novakovic deposit, Bosnia and Herzegovina." Chemical Industry 72, no. 6: 371-382.

Journal article
Published: 01 January 2017 in Zastita materijala
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Dizajn modernih industrijskih proizvoda je takav da oni predstavljaju kompleksne spojeve različitih materijala. Zbog toga se u postupku reciklaže materijala primenjuju procesi usitnjavanja i razdvajanja. Međutim materijali se ne mogu u potpunosti razdvojiti i zbog toga dolazi do kontaminacija u reciklažnim tokovima. Zbog toga se kvalitet materijala može smanjivati u svakom narednom reciklažnom koraku. Ovakvi kvalitativni gubici ne mogu se opisati masenim bilansom, i u radu je prikazan eksergijski koncept kao merilo gubitaka kvaliteta, odnosno dat je metod za izračunavanje eksergijskog sadržaja i eksergijskog gubitka. Gubici pripisani reciklaži ili tačnije materijalni gubici, gubici usled kontaminacije drugim metalima i posledično potreba za razblaživanjem, mogu se koristiti kao indikatori gubitka kvaliteta materijala i efikasnosti korišćenja resursa u proizvodnim sistemima. U radu je dat primer proračuna na čeličnom otpadu. eksergijski koncept; reciklaža; kontaminacija; kvalitativni gubici

ACS Style

Branislav Markovic; Miroslav Sokic; Ilija Ilic; Vaso Manojlovic; Zvonko Gulisija; Dragana Zivkovic; Nada Strbac; Marković Branislav; Sokić Miroslav; Ilić Ilija; Manojlović Vaso; Gulišija Zvonko; Živković Dragana; Štrbac Nada. Exergy concept and its implementation in the recycling of metals. Zastita materijala 2017, 58, 100 -103.

AMA Style

Branislav Markovic, Miroslav Sokic, Ilija Ilic, Vaso Manojlovic, Zvonko Gulisija, Dragana Zivkovic, Nada Strbac, Marković Branislav, Sokić Miroslav, Ilić Ilija, Manojlović Vaso, Gulišija Zvonko, Živković Dragana, Štrbac Nada. Exergy concept and its implementation in the recycling of metals. Zastita materijala. 2017; 58 (1):100-103.

Chicago/Turabian Style

Branislav Markovic; Miroslav Sokic; Ilija Ilic; Vaso Manojlovic; Zvonko Gulisija; Dragana Zivkovic; Nada Strbac; Marković Branislav; Sokić Miroslav; Ilić Ilija; Manojlović Vaso; Gulišija Zvonko; Živković Dragana; Štrbac Nada. 2017. "Exergy concept and its implementation in the recycling of metals." Zastita materijala 58, no. 1: 100-103.

Journal article
Published: 01 January 2017 in Tehnika
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Production of non ferrous metals from secondary raw materials is far less costly than its production from primary raw materials, due to lower energy consumption. Besides, by recycling of non ferrous metals from secondary raw materials, the natural resources are saved and the amount of waste materials is reduced, directly protecting the environment. The secondary raw materials can originate in metal production and treatment, accompanied by their incorporation into the final product and its elimination due to amortization. The different methods of preparation and metallurgical treatment are used depending on secondary raw materials type. Some of them are very easy to be recycled by remelting in metallurgical furnace, while others must pass through complicated preparation before metallurgical treatment.

ACS Style

Miroslav Sokic; Branislav Markovic; Vladislav Matkovic; Zvonko Gulisija; Vaso Manojlovic; Nada Strbac; Sokić Miroslav; Marković Branislav; Matković Vladislav; Gulišija Zvonko; Manojlović Vaso; Štrbac Nada. The valorization impact and methods for treatment of non ferrous secondary raw materials. Tehnika 2017, 72, 212 -218.

AMA Style

Miroslav Sokic, Branislav Markovic, Vladislav Matkovic, Zvonko Gulisija, Vaso Manojlovic, Nada Strbac, Sokić Miroslav, Marković Branislav, Matković Vladislav, Gulišija Zvonko, Manojlović Vaso, Štrbac Nada. The valorization impact and methods for treatment of non ferrous secondary raw materials. Tehnika. 2017; 72 (2):212-218.

Chicago/Turabian Style

Miroslav Sokic; Branislav Markovic; Vladislav Matkovic; Zvonko Gulisija; Vaso Manojlovic; Nada Strbac; Sokić Miroslav; Marković Branislav; Matković Vladislav; Gulišija Zvonko; Manojlović Vaso; Štrbac Nada. 2017. "The valorization impact and methods for treatment of non ferrous secondary raw materials." Tehnika 72, no. 2: 212-218.

Journal article
Published: 01 January 2017 in Chemical Industry
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In this paper, the influence of structural and textural characteristics of sulfide minerals on their leaching from a polymetallic concentrate by sulfuric acid and sodium nitrate solution is presented. The starting material was Pb?Zn?Cu sulphide polymetallic concentrate enriched during the flotation of a polymetallic ore in the "Rudnik" flotation plant (Rudnik ? Serbia). Leaching experiments were carried out in a closed glass reactor, which provides stable hermetic conditions and allows heating at constant temperature. Chemical, XRD, qualitative and quantitative microscopic and SEM/EDX analyses were used to characterizes samples of the polymetallic concentrate and leach residue. It was determined that chalcopyrite, sphalerite, galena, pyrrhotite and quartz were present in the polymetallic concentrate. The content of sulphide minerals was 69.5%, of which 60.9% occurred as liberated grains: 88.3% of chalcopyrite, 59.3% of sphalerite, 25.1% of galena and 51.6% of pirrhotite. The rest of chalcopyrite, sphalerite, galena and pirrhotite grains were in the forms of inclusions, impregnations, and simple and complex intergrowths. During the leaching process by sodium nitrate and sulphuric acid solution, it was shown previously that the leaching rate of sulphide minerals decreased with time while a part of the sulphide minerals remained in the leach residue. After leaching at 80?C for 120 min, the yields were 69.8, 82.7 and 67.1% for Cu, Zn and Fe, respectively. Lead, in the form of insoluble anglesite, remained in the leach residue. In addition to the anglesite, unleached sulfide minerals and quartz, elemental sulfur was found in the solid residue. The content of sulphide minerals was 35% of which 33.7% minerals occur independently. In specific, 54.7% of chalcopyrite, 31.9% of sphalerite, 8.2% of galena and 37.6% of pyrrhotite appear as separate grains with highly corroded surfaces. Therefore, the structural assembly of sulphide grains in the polymetallic concentrate is favourable and it is not the reason for the observed decrease in the leaching rate in the final process stages. The obtained findings may be explained by the presence of elemental sulphur that is formed during the reaction and precipitated at the grain surfaces, thus creating a diffusion barrier for the leach solution.

ACS Style

Miroslav Sokic; Jovica Stojanovic; Branislav Marković; Mladen Bugarcic; Nada Strbac; Zeljko Kamberovic; Vaso Manojlovic. Effects of structural and textural grain characteristics on leaching of sulphide minerals from a polymetallic concentrate by sodium nitrate and sulphuric acid solution. Chemical Industry 2017, 71, 461 -469.

AMA Style

Miroslav Sokic, Jovica Stojanovic, Branislav Marković, Mladen Bugarcic, Nada Strbac, Zeljko Kamberovic, Vaso Manojlovic. Effects of structural and textural grain characteristics on leaching of sulphide minerals from a polymetallic concentrate by sodium nitrate and sulphuric acid solution. Chemical Industry. 2017; 71 (6):461-469.

Chicago/Turabian Style

Miroslav Sokic; Jovica Stojanovic; Branislav Marković; Mladen Bugarcic; Nada Strbac; Zeljko Kamberovic; Vaso Manojlovic. 2017. "Effects of structural and textural grain characteristics on leaching of sulphide minerals from a polymetallic concentrate by sodium nitrate and sulphuric acid solution." Chemical Industry 71, no. 6: 461-469.

Articles
Published: 12 October 2015 in Journal of Environmental Science and Health, Part A
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The presented study investigates solidification/stabilization process of hazardous heavy metals/arsenic sludge, generated after the treatment of the wastewater from a primary copper smelter. Fly ash and fly ash with addition of hydrated lime and Portland composite cement were studied as potential binders. The effectiveness of the process was evaluated by unconfined compressive strength (UCS) testing, leaching tests (EN 12457-4 and TCLP) and acid neutralization capacity (ANC) test. It was found that introduction of cement into the systems increased the UCS, led to reduced leaching of Cu, Ni and Zn, but had a negative effect on the ANC. Gradual addition of lime resulted in decreased UCS, significant reduction of metals leaching and high ANC, due to the excess of lime that remained unreacted in pozzolanic reaction. Stabilization of more than 99% of heavy metals and 90% of arsenic has been achieved. All the samples had UCS above required value for safe disposal. In addition to standard leaching tests, solidificates were exposed to atmospheric conditions during one year in order to determine the actual leaching level of metals in real environment. It can be concluded that the EN 12457-4 test is more similar to the real environmental conditions, while the TCLP test highly exaggerates the leaching of metals. The paper also presents results of differential acid neutralization (d-AN) analysis compared with mineralogical study done by scanning electron microscopy and X-ray diffraction analysis. The d-AN coupled with Eh-pH (Pourbaix) diagrams were proven to be a new effective method for analysis of amorphous solidified structure.

ACS Style

Dragana Đ. Radovanović; Željko J. Kamberović; Marija S. Korać; Jelena R. Rogan. Solidified structure and leaching properties of metallurgical wastewater treatment sludge after solidification/stabilization process. Journal of Environmental Science and Health, Part A 2015, 51, 34 -43.

AMA Style

Dragana Đ. Radovanović, Željko J. Kamberović, Marija S. Korać, Jelena R. Rogan. Solidified structure and leaching properties of metallurgical wastewater treatment sludge after solidification/stabilization process. Journal of Environmental Science and Health, Part A. 2015; 51 (1):34-43.

Chicago/Turabian Style

Dragana Đ. Radovanović; Željko J. Kamberović; Marija S. Korać; Jelena R. Rogan. 2015. "Solidified structure and leaching properties of metallurgical wastewater treatment sludge after solidification/stabilization process." Journal of Environmental Science and Health, Part A 51, no. 1: 34-43.

Research article
Published: 18 February 2015 in The Scientific World Journal
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The objects of this investigation were the comparative kinetic analysis of the NiO and NiCl2 reduction by hydrogen during an induction period and elimination of the calcination during the synthesis of Ni/Al2O3 catalysts. The effect of temperature and time on NiO and NiCl2 reduction degrees was studied. Avrami I equation was selected as the most favorable kinetic model and used to determine activation energy of the NiO and NiCl2 reduction for the investigated temperature range (623–923 K) and time intervals (1–5 minutes). The investigation enabled reaching conclusions about the reaction ability and rate of the reduction processes. Afterward, Ni/Al2O3 catalysts were obtained by using oxide and chloride precursor for Ni. The catalysts were supported on alumina-based foam and prepared via aerosol route. Properties of the samples before and after low-temperature hydrogen reduction (633 K) were compared. Obtained results indicated that the synthesis of Ni/Al2O3 catalysts can be more efficient if chloride precursor for Ni is directly reduced by hydrogen during the synthesis process, without the calcination step. In addition, Ni-Pd/Al2O3 catalysts with different metal content were prepared by using chloride precursors. Lower reduction temperature was utilized and the chlorides were almost completely reduced at 533 K.

ACS Style

Miroslav Sokic; Zeljko Kamberovic; Vesna Nikolic; Branislav Marković; Marija Korać; Zoran Anđić; Milorad Gavrilovski. Kinetics of NiO and NiCl2 Hydrogen Reduction as Precursors and Properties of Produced Ni/Al2O3 and Ni-Pd/Al2O3 Catalysts. The Scientific World Journal 2015, 2015, 1 -9.

AMA Style

Miroslav Sokic, Zeljko Kamberovic, Vesna Nikolic, Branislav Marković, Marija Korać, Zoran Anđić, Milorad Gavrilovski. Kinetics of NiO and NiCl2 Hydrogen Reduction as Precursors and Properties of Produced Ni/Al2O3 and Ni-Pd/Al2O3 Catalysts. The Scientific World Journal. 2015; 2015 (5):1-9.

Chicago/Turabian Style

Miroslav Sokic; Zeljko Kamberovic; Vesna Nikolic; Branislav Marković; Marija Korać; Zoran Anđić; Milorad Gavrilovski. 2015. "Kinetics of NiO and NiCl2 Hydrogen Reduction as Precursors and Properties of Produced Ni/Al2O3 and Ni-Pd/Al2O3 Catalysts." The Scientific World Journal 2015, no. 5: 1-9.

Journal article
Published: 01 January 2015 in Chemical Industry
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Copper mine "Cerovo"- East Serbia as well as the other ore bodies in its vicinity contain a significant amount of oxide copper minerals in their uper layers (>40%). Processing of such mixed ores by the existing concentration technologies leads to a substantial copper losses (

ACS Style

Miroslav Sokic; Vladan Milosevic; Velizar Stankovic; Vladislav Matkovic; Branislav Marković. Acid leaching of oxide-sulphide copper ore prior the flotation: A way for an increased metal recovery. Chemical Industry 2015, 69, 453 -458.

AMA Style

Miroslav Sokic, Vladan Milosevic, Velizar Stankovic, Vladislav Matkovic, Branislav Marković. Acid leaching of oxide-sulphide copper ore prior the flotation: A way for an increased metal recovery. Chemical Industry. 2015; 69 (5):453-458.

Chicago/Turabian Style

Miroslav Sokic; Vladan Milosevic; Velizar Stankovic; Vladislav Matkovic; Branislav Marković. 2015. "Acid leaching of oxide-sulphide copper ore prior the flotation: A way for an increased metal recovery." Chemical Industry 69, no. 5: 453-458.

Journal article
Published: 01 January 2015 in Zastita materijala
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In the refinement process of bismuth by chlorinating of Bi-Pb alloy (Kroll-Betterton process) as a by-product lead chloride is formed. This study was focused on the lead valorization from PbCl 2 by aluminothermic and zincothermic reduction. Besides lead, as a main product, during aforementioned process technical grade alumina (aluminothermic reduction) and ZnCl2 (zincothermic reduction) were also obtained. The secondary aluminium and zinc of different granulometry were used as a reducent. The effect of temperature, time, granulometry of reducents and stirring speed (zincothermic reduction) on the lead recovery was investigated. Based on the experimental results, the optimal process parameters were defined. Recovery of crude lead (containing 98%Pb) was in the range 95-98% for aluminothermic reduction and 85-90% for zincothermic reduction. The crude lead can be further processed in lead smelters. Technical grade alumina was used in ceramic industry, wile zinc-chloride is suitable for hydrometallurgical treatment giving 50 % solution of zinc-chloride as the final product.

ACS Style

Vladislav Matkovic; Branislav Marković; Miroslav Sokic; Vaso Manojlovic; Matkovic Vladislav; Markovic Branislav; Sokic Miroslav; Manojlović Vaso. Recovery of lead from by-products of the bismuth refining by metallothermic reduction treatments. Zastita materijala 2015, 56, 59 -63.

AMA Style

Vladislav Matkovic, Branislav Marković, Miroslav Sokic, Vaso Manojlovic, Matkovic Vladislav, Markovic Branislav, Sokic Miroslav, Manojlović Vaso. Recovery of lead from by-products of the bismuth refining by metallothermic reduction treatments. Zastita materijala. 2015; 56 (1):59-63.

Chicago/Turabian Style

Vladislav Matkovic; Branislav Marković; Miroslav Sokic; Vaso Manojlovic; Matkovic Vladislav; Markovic Branislav; Sokic Miroslav; Manojlović Vaso. 2015. "Recovery of lead from by-products of the bismuth refining by metallothermic reduction treatments." Zastita materijala 56, no. 1: 59-63.

Journal article
Published: 31 March 2014 in Metallurgical and Materials Engineering
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During the chalcopyrite leaching by sodium nitrate and sulfuric acid solution, leaching rate decreases with increasing the time and a part of chalcopyrite mineral grains remains in the leach residue. In chalcopyrite concentrate, 95.5 % of chalcopyrite mineral occurs as in liberated grains, and the rest is in association with gangue minerals, which is very favorably from the aspect of hydrometallurgical treatment. Complex forms, like impregnations and complex intergrowths, do not exist. After experiments carried out, leaching of copper achieved 84 % at temperature 80 o C and time 240 min. In the all leach residues, 97 % chalcopyrite mineral grains occur as liberated with highly corroded surfaces. Therefore, the structural assembly of chalcopyrite grains is favorable and no reason to reduce the leaching rate in the final stage of reaction. Reason for this is elemental sulfur, which was formed during the reaction, precipitated at the particle surfaces, and slowed down the leaching rate in the final stage of leaching process.

ACS Style

Miroslav Sokić; Slobodan Radosavljevic; Branislav Marković; Vladislav Matkovic; Nada Strbac; Zeljko Kamberovic; Dragana Zivkovic; Sokic Miroslav; Radosavljević Slobodan; Markovic Branislav; Matkovic Vladislav; Strbac Nada; Kamberović Željko; Zivkovic Dragana. Influence of chalcopyrite structure on their leaching by sodium nitrate in sulphuric acid. Metallurgical and Materials Engineering 2014, 20, 53 -60.

AMA Style

Miroslav Sokić, Slobodan Radosavljevic, Branislav Marković, Vladislav Matkovic, Nada Strbac, Zeljko Kamberovic, Dragana Zivkovic, Sokic Miroslav, Radosavljević Slobodan, Markovic Branislav, Matkovic Vladislav, Strbac Nada, Kamberović Željko, Zivkovic Dragana. Influence of chalcopyrite structure on their leaching by sodium nitrate in sulphuric acid. Metallurgical and Materials Engineering. 2014; 20 (1):53-60.

Chicago/Turabian Style

Miroslav Sokić; Slobodan Radosavljevic; Branislav Marković; Vladislav Matkovic; Nada Strbac; Zeljko Kamberovic; Dragana Zivkovic; Sokic Miroslav; Radosavljević Slobodan; Markovic Branislav; Matkovic Vladislav; Strbac Nada; Kamberović Željko; Zivkovic Dragana. 2014. "Influence of chalcopyrite structure on their leaching by sodium nitrate in sulphuric acid." Metallurgical and Materials Engineering 20, no. 1: 53-60.

Journal article
Published: 01 March 2014 in Archives of Metallurgy and Materials
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The Bi-Cu-Ni ternary system belongs to the group of potential Cu-Ni-based advanced lead-free solder materials for high temperature application. In this study microstructure investigation of the slow-cooled Bi-Cu-Ni samples was done using SEM-EDS analysis. The samples compositions were chosen along three cross-sections with molar ratio Cu:Ni=1:3, 1:1 and 3:1. The experimentally obtained phase structure was compared with the results of thermodynamic calculation according to CALPHAD method. Also, new results regarding thermal and electrical properties investigations of these alloys are presented in this paper, based on DSC and electroconductivity measurements.

ACS Style

B. Marković; D. Zivkovic; D. Manasijeyić; M. Sokic; D. Minić; N. Talijan; J. Stajić-Trosić. Thermal, Structural and Electrical Properties of Some Bi-Cu-Ni Alloys. Archives of Metallurgy and Materials 2014, 59, 117 -120.

AMA Style

B. Marković, D. Zivkovic, D. Manasijeyić, M. Sokic, D. Minić, N. Talijan, J. Stajić-Trosić. Thermal, Structural and Electrical Properties of Some Bi-Cu-Ni Alloys. Archives of Metallurgy and Materials. 2014; 59 (1):117-120.

Chicago/Turabian Style

B. Marković; D. Zivkovic; D. Manasijeyić; M. Sokic; D. Minić; N. Talijan; J. Stajić-Trosić. 2014. "Thermal, Structural and Electrical Properties of Some Bi-Cu-Ni Alloys." Archives of Metallurgy and Materials 59, no. 1: 117-120.