TY  - JOUR
AU  - Dimitrijevic, Silvana B.
AU  - Velickovic, Suzana R.
AU  - Ivanovic, Aleksandra T.
AU  - Veljkovic, Filip M.
AU  - Jovanovic, Milan M.
AU  - Kamberović, Željko
AU  - Dimitrijević, Stevan
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4807
AB  - A cost-effective and simple hydrometallurgy procedure for recycling the diamond core drilling crowns by nitric acid leaching, followed by the sodium hydroxide leaching, has been developed. The effect of temperature, nitric acid/sodium hydroxide concentration, leaching time and stirring rate were studied. For the acid leaching process the optimal values for parameters were 60 degrees C, 1.0 M HNO3, 2.5 h, and 800 rpm. It has been noted that the key factors in the alkaline leaching process were temperature and NaOH concentration. For the alkaline leaching, the optimal parameters were 100 degrees C, 40% concentration of NaOH solution, and leaching time of 4 h. Identification and characterisation of products in all technological processes were performed by X-Ray Diffraction (XRD), scanning electron microscope using energy-dispersive X-ray spectroscopy (SEM-EDS), and laser desorption ionisation mass spectrometry (LDI-MS). The analysis of solutions in all phases was performed by inductively coupled plasma atomic emission spectroscopy (ICP-AES). The use of LDI-MS as a new approach to identify the products after phases in the recycling process was an important part of the study, and the results were consistent with the XRD analysis. The total tungsten recovery was over 95.6%, with a high purity of the obtained tungsten trioxide.
T2  - International Journal of Refractory Metals & Hard Materials
T1  - Recovery of tungsten trioxide from waste diamond core drilling crowns by nitric acid leaching
VL  - 101
DO  - 10.1016/j.ijrmhm.2021.105695
ER  - 

@article{
author = "Dimitrijevic, Silvana B. and Velickovic, Suzana R. and Ivanovic, Aleksandra T. and Veljkovic, Filip M. and Jovanovic, Milan M. and Kamberović, Željko and Dimitrijević, Stevan",
year = "2021",
abstract = "A cost-effective and simple hydrometallurgy procedure for recycling the diamond core drilling crowns by nitric acid leaching, followed by the sodium hydroxide leaching, has been developed. The effect of temperature, nitric acid/sodium hydroxide concentration, leaching time and stirring rate were studied. For the acid leaching process the optimal values for parameters were 60 degrees C, 1.0 M HNO3, 2.5 h, and 800 rpm. It has been noted that the key factors in the alkaline leaching process were temperature and NaOH concentration. For the alkaline leaching, the optimal parameters were 100 degrees C, 40% concentration of NaOH solution, and leaching time of 4 h. Identification and characterisation of products in all technological processes were performed by X-Ray Diffraction (XRD), scanning electron microscope using energy-dispersive X-ray spectroscopy (SEM-EDS), and laser desorption ionisation mass spectrometry (LDI-MS). The analysis of solutions in all phases was performed by inductively coupled plasma atomic emission spectroscopy (ICP-AES). The use of LDI-MS as a new approach to identify the products after phases in the recycling process was an important part of the study, and the results were consistent with the XRD analysis. The total tungsten recovery was over 95.6%, with a high purity of the obtained tungsten trioxide.",
journal = "International Journal of Refractory Metals & Hard Materials",
title = "Recovery of tungsten trioxide from waste diamond core drilling crowns by nitric acid leaching",
volume = "101",
doi = "10.1016/j.ijrmhm.2021.105695"
}

Dimitrijevic, S. B., Velickovic, S. R., Ivanovic, A. T., Veljkovic, F. M., Jovanovic, M. M., Kamberović, Ž.,& Dimitrijević, S.. (2021). Recovery of tungsten trioxide from waste diamond core drilling crowns by nitric acid leaching. in International Journal of Refractory Metals & Hard Materials, 101.
https://doi.org/10.1016/j.ijrmhm.2021.105695

Dimitrijevic SB, Velickovic SR, Ivanovic AT, Veljkovic FM, Jovanovic MM, Kamberović Ž, Dimitrijević S. Recovery of tungsten trioxide from waste diamond core drilling crowns by nitric acid leaching. in International Journal of Refractory Metals & Hard Materials. 2021;101.
doi:10.1016/j.ijrmhm.2021.105695 .

Dimitrijevic, Silvana B., Velickovic, Suzana R., Ivanovic, Aleksandra T., Veljkovic, Filip M., Jovanovic, Milan M., Kamberović, Željko, Dimitrijević, Stevan, "Recovery of tungsten trioxide from waste diamond core drilling crowns by nitric acid leaching" in International Journal of Refractory Metals & Hard Materials, 101 (2021),
https://doi.org/10.1016/j.ijrmhm.2021.105695 . .

TY  - JOUR
AU  - Dimitrijevic, Silvana B.
AU  - Alagic, Sladana
AU  - Pavlovic, Sonja
AU  - Stankovic, Biljana
AU  - Kotur, Nikola
AU  - Ivanovic, Aleksandra
AU  - Dimitrijević, Stevan
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4822
AB  - The study presents the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay results on human erythroleukemia K562 cell line to compare the toxicity of electrolytes based on the mercaptotriazole gold complex (Au-MT) and gold potassium cyanide. Solutions immediately after mixing and after three months at different concentrations were compared, with a prolonged aging period, to a year, for the electrolytes at pH = 9. Lower toxicity of new organic gold complex at pH = 4, 7, and 12 than of alkaline cyanide electrolyte, but higher at pH = 2, was determined. The solution of the Au-MT at pH = 9 had comparable, but lower cell toxicity in the whole investigated period.
T2  - Journal of the Indian Chemical Society
T1  - Cytotoxicity of the gold complex based on mercaptotriazole - A comparison with the conventional cyanide electrolyte
IS  - 11
VL  - 98
DO  - 10.1016/j.jics.2021.100219
ER  - 

@article{
author = "Dimitrijevic, Silvana B. and Alagic, Sladana and Pavlovic, Sonja and Stankovic, Biljana and Kotur, Nikola and Ivanovic, Aleksandra and Dimitrijević, Stevan",
year = "2021",
abstract = "The study presents the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay results on human erythroleukemia K562 cell line to compare the toxicity of electrolytes based on the mercaptotriazole gold complex (Au-MT) and gold potassium cyanide. Solutions immediately after mixing and after three months at different concentrations were compared, with a prolonged aging period, to a year, for the electrolytes at pH = 9. Lower toxicity of new organic gold complex at pH = 4, 7, and 12 than of alkaline cyanide electrolyte, but higher at pH = 2, was determined. The solution of the Au-MT at pH = 9 had comparable, but lower cell toxicity in the whole investigated period.",
journal = "Journal of the Indian Chemical Society",
title = "Cytotoxicity of the gold complex based on mercaptotriazole - A comparison with the conventional cyanide electrolyte",
number = "11",
volume = "98",
doi = "10.1016/j.jics.2021.100219"
}

Dimitrijevic, S. B., Alagic, S., Pavlovic, S., Stankovic, B., Kotur, N., Ivanovic, A.,& Dimitrijević, S.. (2021). Cytotoxicity of the gold complex based on mercaptotriazole - A comparison with the conventional cyanide electrolyte. in Journal of the Indian Chemical Society, 98(11).
https://doi.org/10.1016/j.jics.2021.100219

Dimitrijevic SB, Alagic S, Pavlovic S, Stankovic B, Kotur N, Ivanovic A, Dimitrijević S. Cytotoxicity of the gold complex based on mercaptotriazole - A comparison with the conventional cyanide electrolyte. in Journal of the Indian Chemical Society. 2021;98(11).
doi:10.1016/j.jics.2021.100219 .

Dimitrijevic, Silvana B., Alagic, Sladana, Pavlovic, Sonja, Stankovic, Biljana, Kotur, Nikola, Ivanovic, Aleksandra, Dimitrijević, Stevan, "Cytotoxicity of the gold complex based on mercaptotriazole - A comparison with the conventional cyanide electrolyte" in Journal of the Indian Chemical Society, 98, no. 11 (2021),
https://doi.org/10.1016/j.jics.2021.100219 . .