TY  - JOUR
AU  - Mitovski, Aleksandra
AU  - Štrbac, Nada
AU  - Sokić, Miroslav
AU  - Kragović, Milan
AU  - Grekulović, Vesna
PY  - 2017
UR  - https://ritnms.itnms.ac.rs/handle/123456789/436
AB  - Sulfide copper concentrate from domestic ore deposit (Bor, Serbia) was subjected to oxidation in the air atmosphere due to a better understanding of reaction mechanism and oxidation of various sulfides present in the copper concentrate at elevated temperatures. Results of the initial sample characterization showed that concentrate is chalcopyrite-enargite-tennantite type, with an increased arsenic content. Characterization of the oxidation products showed the presence of sulfates, oxysulfates, and oxides. Based on predominance area diagrams for Me-S-O systems (Me = Cu, Fe, As) combined with thermal analysis results, the reaction mechanism of the oxidation process was proposed. The reactions which occur in the temperature range 25 -1000 degrees C indicate that sulfides are unstable in the oxidative conditions. Sulfides from the initial sample decomposed into binary copper and iron sulfides and volatile arsenic oxides at lower temperatures. Further heating led to oxidation of sulfides into iron oxides and copper sulfates and oxysulfates. At higher temperatures sulfates and oxysulfates decomposed into oxides. Kinetic analysis of the oxidation process was done using Ozawa's method in the non-isothermal conditions. The values for activation energies showed that the reactions are chemically controlled and the temperature is the most influential parameter on the reaction rates.
PB  - Savez inženjera metalurgije Srbije, Beograd
T2  - Metallurgical & Materials Engineering
T1  - Reaction mechanism and kinetics of sulfide copper concentrate oxidation at elevated temperatures
EP  - 280
IS  - 3
SP  - 267
VL  - 23
DO  - 10.30544/320
UR  - conv_812
ER  - 

@article{
author = "Mitovski, Aleksandra and Štrbac, Nada and Sokić, Miroslav and Kragović, Milan and Grekulović, Vesna",
year = "2017",
abstract = "Sulfide copper concentrate from domestic ore deposit (Bor, Serbia) was subjected to oxidation in the air atmosphere due to a better understanding of reaction mechanism and oxidation of various sulfides present in the copper concentrate at elevated temperatures. Results of the initial sample characterization showed that concentrate is chalcopyrite-enargite-tennantite type, with an increased arsenic content. Characterization of the oxidation products showed the presence of sulfates, oxysulfates, and oxides. Based on predominance area diagrams for Me-S-O systems (Me = Cu, Fe, As) combined with thermal analysis results, the reaction mechanism of the oxidation process was proposed. The reactions which occur in the temperature range 25 -1000 degrees C indicate that sulfides are unstable in the oxidative conditions. Sulfides from the initial sample decomposed into binary copper and iron sulfides and volatile arsenic oxides at lower temperatures. Further heating led to oxidation of sulfides into iron oxides and copper sulfates and oxysulfates. At higher temperatures sulfates and oxysulfates decomposed into oxides. Kinetic analysis of the oxidation process was done using Ozawa's method in the non-isothermal conditions. The values for activation energies showed that the reactions are chemically controlled and the temperature is the most influential parameter on the reaction rates.",
publisher = "Savez inženjera metalurgije Srbije, Beograd",
journal = "Metallurgical & Materials Engineering",
title = "Reaction mechanism and kinetics of sulfide copper concentrate oxidation at elevated temperatures",
pages = "280-267",
number = "3",
volume = "23",
doi = "10.30544/320",
url = "conv_812"
}

Mitovski, A., Štrbac, N., Sokić, M., Kragović, M.,& Grekulović, V.. (2017). Reaction mechanism and kinetics of sulfide copper concentrate oxidation at elevated temperatures. in Metallurgical & Materials Engineering
Savez inženjera metalurgije Srbije, Beograd., 23(3), 267-280.
https://doi.org/10.30544/320
conv_812

Mitovski A, Štrbac N, Sokić M, Kragović M, Grekulović V. Reaction mechanism and kinetics of sulfide copper concentrate oxidation at elevated temperatures. in Metallurgical & Materials Engineering. 2017;23(3):267-280.
doi:10.30544/320
conv_812 .

Mitovski, Aleksandra, Štrbac, Nada, Sokić, Miroslav, Kragović, Milan, Grekulović, Vesna, "Reaction mechanism and kinetics of sulfide copper concentrate oxidation at elevated temperatures" in Metallurgical & Materials Engineering, 23, no. 3 (2017):267-280,
https://doi.org/10.30544/320 .,
conv_812 .

TY  - JOUR
AU  - Vuković, Milovan
AU  - Štrbac, Nada
AU  - Sokić, Miroslav
AU  - Grekulović, Vesna
AU  - Cvetkovski, Vladimir
PY  - 2014
UR  - https://ritnms.itnms.ac.rs/handle/123456789/299
AB  - Biotehnologija kao noviji pristup za ekstrakciju metala nudi mogućnosti za smanjenje zagađenja životne sredine. U ovom radu se od četiri biotehnološka postupka - bioremedijacija, biosorpcija, bioakumulacija i bioluženje - sagledavaju različiti aspekti (uključujući i ekološke) bioluženja polimetaličnih sulfidnih koncentrata koji potiču iz borske rudarske oblasti. Ispitana je mogućnost povećanja brzine oksidacije sulfida bakra u laboratorijskim uslovima u prisustvu termofilnih bakterija. Ekstremno termofilna i oksidaciona bakterijska kultura, razvijena u prisustvu sumpora i gvožđa, izolovana je i adaptirana na visoku koncentraciju jona metala i čestica materijala u rastvoru na temperaturi od 70 °C. Nakon izolacije i adaptacije mikroorganizama, kultura je korišćena u staklenom reaktoru zapremine pet litara za bioluženje (potpomognuto magnetnom agitacijom i aeracijom) polimetaličnog sulfidnog koncentrata koji je od metala sadržavao bakar, cink i olovo. Eksperimenti sprovedeni u ovoj specifičnoj bakteriološkoj sredini pokazali su da je moguće, posle postizanja ravnotežnih uslova, postići visoke stepene ekstrakcije bakra i cinka (do 97%) u dužim vremenskim intervalima - do 80 dana. Olovo-sulfid je tokom ovog procesa oksidacijom prešao u olovo-sulfat, te ostao u biolužnom ostatku zbog neznatne rastvorljivosti u sulfatnom rastvoru. U ovom radu je bioluženje bioostatka sprovedeno po PLINT tehnologiji koja omogućava rastvaranje jedinjenja olova u prisustvu natrijum-hlorida. Rezultati ovih eksperimenata su potvrdili rezultate sličnih istraživanja po kojima je moguće dobiti visoke stepene ekstrakcije olova iz biolužnog ostatka polimetaličnih koncentrata - i do 95%.
AB  - An extreme thermophilic, iron-sulphur oxidising bacterial culture was isolated and adapted to tolerate high metal and solids concentrations at 70 °C. Following isolation and adaptation, the culture was used in a batch bioleach test employing a 5-l glass standard magnetic agitated and aerated reactor, for the bioleaching of a copper-lead-zinc collective concentrate. The culture exhibited stable leach performance over the period of leach operation and overall copper and zinc extractions higher than 97%. Lead sulphide is transformed into lead sulphate remaining in the bioleach residue due to the low solubility in sulphate media. Brine leaching of bioleach residue yields 95% lead extraction.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska industrija
T1  - Bioluženje polimetaličnog sulfidnog koncentrata termofilnim bakterijama
T1  - Bioleaching of pollymetallic sulphide concentrate using thermophilic bacteria
EP  - 583
IS  - 5
SP  - 575
VL  - 68
DO  - 10.2298/HEMIND130905087V
UR  - conv_303
ER  - 

@article{
author = "Vuković, Milovan and Štrbac, Nada and Sokić, Miroslav and Grekulović, Vesna and Cvetkovski, Vladimir",
year = "2014",
abstract = "Biotehnologija kao noviji pristup za ekstrakciju metala nudi mogućnosti za smanjenje zagađenja životne sredine. U ovom radu se od četiri biotehnološka postupka - bioremedijacija, biosorpcija, bioakumulacija i bioluženje - sagledavaju različiti aspekti (uključujući i ekološke) bioluženja polimetaličnih sulfidnih koncentrata koji potiču iz borske rudarske oblasti. Ispitana je mogućnost povećanja brzine oksidacije sulfida bakra u laboratorijskim uslovima u prisustvu termofilnih bakterija. Ekstremno termofilna i oksidaciona bakterijska kultura, razvijena u prisustvu sumpora i gvožđa, izolovana je i adaptirana na visoku koncentraciju jona metala i čestica materijala u rastvoru na temperaturi od 70 °C. Nakon izolacije i adaptacije mikroorganizama, kultura je korišćena u staklenom reaktoru zapremine pet litara za bioluženje (potpomognuto magnetnom agitacijom i aeracijom) polimetaličnog sulfidnog koncentrata koji je od metala sadržavao bakar, cink i olovo. Eksperimenti sprovedeni u ovoj specifičnoj bakteriološkoj sredini pokazali su da je moguće, posle postizanja ravnotežnih uslova, postići visoke stepene ekstrakcije bakra i cinka (do 97%) u dužim vremenskim intervalima - do 80 dana. Olovo-sulfid je tokom ovog procesa oksidacijom prešao u olovo-sulfat, te ostao u biolužnom ostatku zbog neznatne rastvorljivosti u sulfatnom rastvoru. U ovom radu je bioluženje bioostatka sprovedeno po PLINT tehnologiji koja omogućava rastvaranje jedinjenja olova u prisustvu natrijum-hlorida. Rezultati ovih eksperimenata su potvrdili rezultate sličnih istraživanja po kojima je moguće dobiti visoke stepene ekstrakcije olova iz biolužnog ostatka polimetaličnih koncentrata - i do 95%., An extreme thermophilic, iron-sulphur oxidising bacterial culture was isolated and adapted to tolerate high metal and solids concentrations at 70 °C. Following isolation and adaptation, the culture was used in a batch bioleach test employing a 5-l glass standard magnetic agitated and aerated reactor, for the bioleaching of a copper-lead-zinc collective concentrate. The culture exhibited stable leach performance over the period of leach operation and overall copper and zinc extractions higher than 97%. Lead sulphide is transformed into lead sulphate remaining in the bioleach residue due to the low solubility in sulphate media. Brine leaching of bioleach residue yields 95% lead extraction.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska industrija",
title = "Bioluženje polimetaličnog sulfidnog koncentrata termofilnim bakterijama, Bioleaching of pollymetallic sulphide concentrate using thermophilic bacteria",
pages = "583-575",
number = "5",
volume = "68",
doi = "10.2298/HEMIND130905087V",
url = "conv_303"
}

Vuković, M., Štrbac, N., Sokić, M., Grekulović, V.,& Cvetkovski, V.. (2014). Bioluženje polimetaličnog sulfidnog koncentrata termofilnim bakterijama. in Hemijska industrija
Savez hemijskih inženjera, Beograd., 68(5), 575-583.
https://doi.org/10.2298/HEMIND130905087V
conv_303

Vuković M, Štrbac N, Sokić M, Grekulović V, Cvetkovski V. Bioluženje polimetaličnog sulfidnog koncentrata termofilnim bakterijama. in Hemijska industrija. 2014;68(5):575-583.
doi:10.2298/HEMIND130905087V
conv_303 .

Vuković, Milovan, Štrbac, Nada, Sokić, Miroslav, Grekulović, Vesna, Cvetkovski, Vladimir, "Bioluženje polimetaličnog sulfidnog koncentrata termofilnim bakterijama" in Hemijska industrija, 68, no. 5 (2014):575-583,
https://doi.org/10.2298/HEMIND130905087V .,
conv_303 .