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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.
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 StyleNela 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 StyleNela 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.
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.
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 StyleMiroslav 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 StyleMiroslav 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.
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.
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 StyleMiroslav 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 StyleMiroslav 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.
D. Ranđelović; Srđan Stanković; N. Mihailović; D. Leštan. Remediation of Copper from Copper Mine Wastes and Contaminated Soils Using (S,S)-Ethylenediaminedisuccinic Acid and Acidophilic Bacteria. Bioremediation Journal 2015, 19, 231 -238.
AMA StyleD. Ranđelović, Srđan Stanković, N. Mihailović, D. Leštan. Remediation of Copper from Copper Mine Wastes and Contaminated Soils Using (S,S)-Ethylenediaminedisuccinic Acid and Acidophilic Bacteria. Bioremediation Journal. 2015; 19 (3):231-238.
Chicago/Turabian StyleD. Ranđelović; Srđan Stanković; N. Mihailović; D. Leštan. 2015. "Remediation of Copper from Copper Mine Wastes and Contaminated Soils Using (S,S)-Ethylenediaminedisuccinic Acid and Acidophilic Bacteria." Bioremediation Journal 19, no. 3: 231-238.
An investigation of the microbial diversity of the extremely acidic, metal-rich Lake Robule was carried out using culture-dependant and culture-independent (T-RFLP) methods, and the ability of indigenous bacteria from the lake water to leach copper from a mineral concentrate was tested. T-RFLP analysis revealed that the dominant bacteria in lake water samples were the obligate heterotroph Acidiphilium cryptum (~50% of total bacteria) and the iron-oxidizing autotroph Leptospirillum ferrooxidans (~40%) The iron/sulfur-oxidizing autotroph Acidithiobacillus ferrooxidans had been reported to be the most abundant bacteria in the lake in an earlier study by other authors, but it was not detected in the present study using T-RFLP. Although it was isolated on solid media and detected in enrichment (bioleaching) cultures. The presence of the two bacterial species detected by T-RFLP (L. ferrooxidans and A. cryptum) was also confirmed by cultivation on solid media. The presence and relative abundance of bacteria inhabiting Lake Robule was explained by the physiological characteristics of the bacteria and the physico-chemical characteristics of the lake water.
Srđan Stanković; Ivana Moric; Aleksandar Pavic; Branka Vasiljevic; Barrie Johnson; Vladica Cvetkovic. Investigation of the microbial diversity of an extremely acidic, metal-rich water body (Lake Robule, Bor, Serbia). Journal of the Serbian Chemical Society 2014, 79, 729 -741.
AMA StyleSrđan Stanković, Ivana Moric, Aleksandar Pavic, Branka Vasiljevic, Barrie Johnson, Vladica Cvetkovic. Investigation of the microbial diversity of an extremely acidic, metal-rich water body (Lake Robule, Bor, Serbia). Journal of the Serbian Chemical Society. 2014; 79 (6):729-741.
Chicago/Turabian StyleSrđan Stanković; Ivana Moric; Aleksandar Pavic; Branka Vasiljevic; Barrie Johnson; Vladica Cvetkovic. 2014. "Investigation of the microbial diversity of an extremely acidic, metal-rich water body (Lake Robule, Bor, Serbia)." Journal of the Serbian Chemical Society 79, no. 6: 729-741.