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Stevanović, Marija

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  • Stevanović, Marija (2)
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Author's Bibliography

Measurement of Permittivity of Solid and Liquid Dielectrics in Coaxial Chambers

Đorđević, Antonije; Dinkić, Jelena; Stevanović, Marija; Olćan, Dragan; Filipović, Suzana; Obradović, Nina

(Belgrade : National Society for Microwave Technique, Technologies and Systems and Serbia and Montenegro IEEE MTT-S Chapter, 2016)

TY  - JOUR
AU  - Đorđević, Antonije
AU  - Dinkić, Jelena
AU  - Stevanović, Marija
AU  - Olćan, Dragan
AU  - Filipović, Suzana
AU  - Obradović, Nina
PY  - 2016
UR  - http://dais.sanu.ac.rs/123456789/2319
AB  - We present two coaxial chambers for measurements of  the  complex  permittivity of solid  and  liquid  samples, in a frequency range that is in the transition between lower frequencies, here  parallel-plate capacitor techniques are used, and higher(microwave) frequencies, where antennas, open coaxial  lines, and  waveguide s  are  employed.  Using  a  network  analyzer,  we  measure  the  reflection  coefficient  of  the chamber. From the obtained results, we extract the relative permittivity of the  measured  sample  using  a  quasistatic  or  a  dynamic  model  of  the chamber with the sample.
PB  - Belgrade : National Society for Microwave Technique, Technologies and Systems and Serbia and Montenegro IEEE MTT-S Chapter
T2  - Microwave Review
T1  - Measurement of Permittivity of Solid and Liquid Dielectrics in Coaxial Chambers
SP  - 3
EP  - 9
VL  - 22
IS  - 2
ER  - 
@article{
author = "Đorđević, Antonije and Dinkić, Jelena and Stevanović, Marija and Olćan, Dragan and Filipović, Suzana and Obradović, Nina",
year = "2016",
url = "http://dais.sanu.ac.rs/123456789/2319",
abstract = "We present two coaxial chambers for measurements of  the  complex  permittivity of solid  and  liquid  samples, in a frequency range that is in the transition between lower frequencies, here  parallel-plate capacitor techniques are used, and higher(microwave) frequencies, where antennas, open coaxial  lines, and  waveguide s  are  employed.  Using  a  network  analyzer,  we  measure  the  reflection  coefficient  of  the chamber. From the obtained results, we extract the relative permittivity of the  measured  sample  using  a  quasistatic  or  a  dynamic  model  of  the chamber with the sample.",
publisher = "Belgrade : National Society for Microwave Technique, Technologies and Systems and Serbia and Montenegro IEEE MTT-S Chapter",
journal = "Microwave Review",
title = "Measurement of Permittivity of Solid and Liquid Dielectrics in Coaxial Chambers",
pages = "3-9",
volume = "22",
number = "2"
}
Đorđević, A., Dinkić, J., Stevanović, M., Olćan, D., Filipović, S.,& Obradović, N. (2016). Measurement of Permittivity of Solid and Liquid Dielectrics in Coaxial Chambers.
Microwave ReviewBelgrade : National Society for Microwave Technique, Technologies and Systems and Serbia and Montenegro IEEE MTT-S Chapter., 22(2), 3-9. 
Đorđević A, Dinkić J, Stevanović M, Olćan D, Filipović S, Obradović N. Measurement of Permittivity of Solid and Liquid Dielectrics in Coaxial Chambers. Microwave Review. 2016;22(2):3-9

Dewatering of sludge obtained by neutralisation from sulfuric-acid waste solutions

Marković, Radmila; Gardić, Vojka; Jugović, Branimir; Stevanović, Marija

(Bor: Mining and Metallurgy Institute, 2014)

TY  - JOUR
AU  - Marković, Radmila
AU  - Gardić, Vojka
AU  - Jugović, Branimir
AU  - Stevanović, Marija
PY  - 2014
UR  - https://scindeks.ceon.rs/article.aspx?artid=2334-88361404125M
UR  - http://dais.sanu.ac.rs/123456789/3372
AB  - The aim of this paper was to investigate the possibility of removing the liquid phase from the sludge using the mechanical dewatering methods. The sludge was obtained by neutralization of sulfuric acid waste solution from the process of copper electrolysis, using 1M Ca (OH)2 with and without addition of FeCl3 and AlCl3 as coagulants. Classical method of filtration by gravity and vacuum filtration method were used for tests of sludge dewatering process in the laboratory conditions. Solution volume, amount of sample, dewatering duration was measured during the experiments. The obtained results, presented in this paper, showed that using the vacuum filtration method, high of sludge sample was reduced for 75%, which is almost three times higher value compared to the results obtained using the gravity filtration. Data relating to the time of filtration, using different methods, show that in application of vacuum filtration method the dewatering time is almost 200 times faster compared to the time dewatering with gravity filtration. The shortest settling time was registered for the sludge that was obtained by neutralization process without coagulants addition.
AB  - Cilj ovog rada bio je da se ispita mogućnost uklanjanja tečne faze iz mulja metodama mehaničkog odvodnjavanja. Mulj je dobijen neutralizacijom sumporno-kiselih otpadnih rastvora iz procesa elektrolize bakra, korišćenjem 1M Ca(OH)2 sa i bez dodataka FeCl3 i AlCl3 kao koagulanata. Metoda klasične filtracije pod uticajem gravitacije i metoda vakuumske filtracije, korišćene su za ispitivanja procesa odvodnjavanja mulja u laboratorijskim uslovima. Tokom eksperimenata merena je zapremina rastvora, visina uzoraka, trajanje odvodnjavanja. Dobijeni rezultati prikazani u ovom radu pokazali su da je vakuumskom filtracijom postignuto smanjenje visine mulja od 75 % što predstavlja gotovo 3 puta veću vrednost u odnosu na rezultate dobijene klasičnom filtracijom. Podaci koji se odnose na vreme filtracije primenom različitih metoda, pokazuju da je primenom vakuumske filtracione metode vreme odvodnjavanja gotovo 200 puta kraće u odnosu na vreme odvodnjavanja klasičnom filtracijom. Najkraće vreme bistrenja suspenzije registrovano je kod mulja dobijenog procesom neutralizacije bez dodataka koagulanata.
PB  - Bor: Mining and Metallurgy Institute
T2  - Mining and Metallurgy Engineering Bor
T1  - Dewatering of sludge obtained by neutralisation from sulfuric-acid waste solutions
T1  - Odvodnjavanje mulja dobijenog neutralizacijom sumporno-kiselih otpadnih rastvora
SP  - 125
EP  - 136
IS  - 4
DO  - 10.5937/MMEB1404125M
ER  - 
@article{
author = "Marković, Radmila and Gardić, Vojka and Jugović, Branimir and Stevanović, Marija",
year = "2014",
url = "https://scindeks.ceon.rs/article.aspx?artid=2334-88361404125M, http://dais.sanu.ac.rs/123456789/3372",
abstract = "The aim of this paper was to investigate the possibility of removing the liquid phase from the sludge using the mechanical dewatering methods. The sludge was obtained by neutralization of sulfuric acid waste solution from the process of copper electrolysis, using 1M Ca (OH)2 with and without addition of FeCl3 and AlCl3 as coagulants. Classical method of filtration by gravity and vacuum filtration method were used for tests of sludge dewatering process in the laboratory conditions. Solution volume, amount of sample, dewatering duration was measured during the experiments. The obtained results, presented in this paper, showed that using the vacuum filtration method, high of sludge sample was reduced for 75%, which is almost three times higher value compared to the results obtained using the gravity filtration. Data relating to the time of filtration, using different methods, show that in application of vacuum filtration method the dewatering time is almost 200 times faster compared to the time dewatering with gravity filtration. The shortest settling time was registered for the sludge that was obtained by neutralization process without coagulants addition., Cilj ovog rada bio je da se ispita mogućnost uklanjanja tečne faze iz mulja metodama mehaničkog odvodnjavanja. Mulj je dobijen neutralizacijom sumporno-kiselih otpadnih rastvora iz procesa elektrolize bakra, korišćenjem 1M Ca(OH)2 sa i bez dodataka FeCl3 i AlCl3 kao koagulanata. Metoda klasične filtracije pod uticajem gravitacije i metoda vakuumske filtracije, korišćene su za ispitivanja procesa odvodnjavanja mulja u laboratorijskim uslovima. Tokom eksperimenata merena je zapremina rastvora, visina uzoraka, trajanje odvodnjavanja. Dobijeni rezultati prikazani u ovom radu pokazali su da je vakuumskom filtracijom postignuto smanjenje visine mulja od 75 % što predstavlja gotovo 3 puta veću vrednost u odnosu na rezultate dobijene klasičnom filtracijom. Podaci koji se odnose na vreme filtracije primenom različitih metoda, pokazuju da je primenom vakuumske filtracione metode vreme odvodnjavanja gotovo 200 puta kraće u odnosu na vreme odvodnjavanja klasičnom filtracijom. Najkraće vreme bistrenja suspenzije registrovano je kod mulja dobijenog procesom neutralizacije bez dodataka koagulanata.",
publisher = "Bor: Mining and Metallurgy Institute",
journal = "Mining and Metallurgy Engineering Bor",
title = "Dewatering of sludge obtained by neutralisation from sulfuric-acid waste solutions, Odvodnjavanje mulja dobijenog neutralizacijom sumporno-kiselih otpadnih rastvora",
pages = "125-136",
number = "4",
doi = "10.5937/MMEB1404125M"
}
Marković, R., Gardić, V., Jugović, B.,& Stevanović, M. (2014). Dewatering of sludge obtained by neutralisation from sulfuric-acid waste solutions.
Mining and Metallurgy Engineering BorBor: Mining and Metallurgy Institute., null(4), 125-136. 
https://doi.org/10.5937/MMEB1404125M
Marković R, Gardić V, Jugović B, Stevanović M. Dewatering of sludge obtained by neutralisation from sulfuric-acid waste solutions. Mining and Metallurgy Engineering Bor. 2014;(4):125-136
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