TY  - CHAP
AU  - Tankosić, Ljiljana
AU  - Tančić, Pavle
AU  - Sredić, Svjetlana
AU  - Nedić, Zoran
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5898
AB  - The primary objectives of this study is mineralogical characterization of two sludge samples with different initial content of iron derived by hydro-cyclone overflow generated during the processing of iron ore in the Omarska mine. Also, a comparative study of the mineral composition and its connection with some properties important for the sludge flocculation process was done. Studied sludge samples are composed of major goethite and quartz; less clay minerals; and minor magnetite, hematite, clinochlore and todorokite. They have quite similar qualitative, but different semi-quantitative compositions. There are similar particle size distributions between the samples, and highest contents of about 50% belongs to the finest classes of <6 m. Among size classes within the samples, almost identical iron contents are present; indicating to their similar mineral compositions, which make this system very complex for further separation processes. Sludge II has higher natural settling rate, due to its higher density and mineral composition. With addition of the flocculant, settling rates increases significantly with the increase of the liquid component in both of the samples. The effect of flocculant on the settling rate is different between samples, and depends on their mineral composition. The time of settling does not play a role in selectivity, to the ratio of the mass of floating and sinking parts, and iron content does not change with time. The content of iron partially increases by flocculation; therefore, this method should be considered as an appropriate one. Zeta potential values for sludge are mostly between those for goethite and quartz, indicating their particle mixture and intricately association.
PB  - B P International
T2  - Current Approaches in Science and Technology Research
T1  - Study of the Mineral Composition and Its Connection with Some Properties Important for the Sludge Flocculation Process-Examples from Omarska Mine: A Comparative Approach
VL  - 9
IS  - 6
SP  - 48
EP  - 80
DO  - 10.9734/bpi/castr/v9/10571D
ER  - 

@inbook{
author = "Tankosić, Ljiljana and Tančić, Pavle and Sredić, Svjetlana and Nedić, Zoran",
year = "2021",
abstract = "The primary objectives of this study is mineralogical characterization of two sludge samples with different initial content of iron derived by hydro-cyclone overflow generated during the processing of iron ore in the Omarska mine. Also, a comparative study of the mineral composition and its connection with some properties important for the sludge flocculation process was done. Studied sludge samples are composed of major goethite and quartz; less clay minerals; and minor magnetite, hematite, clinochlore and todorokite. They have quite similar qualitative, but different semi-quantitative compositions. There are similar particle size distributions between the samples, and highest contents of about 50% belongs to the finest classes of <6 m. Among size classes within the samples, almost identical iron contents are present; indicating to their similar mineral compositions, which make this system very complex for further separation processes. Sludge II has higher natural settling rate, due to its higher density and mineral composition. With addition of the flocculant, settling rates increases significantly with the increase of the liquid component in both of the samples. The effect of flocculant on the settling rate is different between samples, and depends on their mineral composition. The time of settling does not play a role in selectivity, to the ratio of the mass of floating and sinking parts, and iron content does not change with time. The content of iron partially increases by flocculation; therefore, this method should be considered as an appropriate one. Zeta potential values for sludge are mostly between those for goethite and quartz, indicating their particle mixture and intricately association.",
publisher = "B P International",
journal = "Current Approaches in Science and Technology Research",
booktitle = "Study of the Mineral Composition and Its Connection with Some Properties Important for the Sludge Flocculation Process-Examples from Omarska Mine: A Comparative Approach",
volume = "9",
number = "6",
pages = "48-80",
doi = "10.9734/bpi/castr/v9/10571D"
}

Tankosić, L., Tančić, P., Sredić, S.,& Nedić, Z.. (2021). Study of the Mineral Composition and Its Connection with Some Properties Important for the Sludge Flocculation Process-Examples from Omarska Mine: A Comparative Approach. in Current Approaches in Science and Technology Research
B P International., 9(6), 48-80.
https://doi.org/10.9734/bpi/castr/v9/10571D

Tankosić L, Tančić P, Sredić S, Nedić Z. Study of the Mineral Composition and Its Connection with Some Properties Important for the Sludge Flocculation Process-Examples from Omarska Mine: A Comparative Approach. in Current Approaches in Science and Technology Research. 2021;9(6):48-80.
doi:10.9734/bpi/castr/v9/10571D .

Tankosić, Ljiljana, Tančić, Pavle, Sredić, Svjetlana, Nedić, Zoran, "Study of the Mineral Composition and Its Connection with Some Properties Important for the Sludge Flocculation Process-Examples from Omarska Mine: A Comparative Approach" in Current Approaches in Science and Technology Research, 9, no. 6 (2021):48-80,
https://doi.org/10.9734/bpi/castr/v9/10571D . .

TY  - JOUR
AU  - Sredić, Svjetlana
AU  - Tankosić, Ljiljana
AU  - Tančić, Pavle
AU  - Nedić, Zoran
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5905
AB  - The waste sludge generated during processing of iron ore in the Omarska mine (The Republic of Srpska, Bosnia and Herzegovina) is fine-grained (<15μm), containing relatively high concentrations of iron, and quartz as its major impurity. The flocculation behaviour of the primary natural raw “quartz” sample from Omarska mine was studied in the present paper. This sample is composed of major quartz which dominates over minor contents of clay minerals and feldspars, and contain 92.9% of SiO2. Particle size distribution analysis confirm that it is present as fine and ultra-fine particles. The zeta potential of quartz depends on pH value. Settling experiments were performed by using three different dispersants (Na-hexamethaphosphate, Na-pyrophosphate and Na-silicate), and anionic polyacrylamide as flocculants. The best results were achieved with Na-hexametaphosphate (1000 g/t) and anionic polyacrylamide A 100. The effect of a flocculant on the settling rate depends on solid concentration. Settling rates increase significantly with the increase of the liquid component in both cases (natural settling and hindered settling by addition of a flocculant).
AB  - Отпадни муљ који настаје у процесу припреме жељезне руде у Руднику Омарска (Република Српска, БиХ) је фине гранулације (< 15 μm), садржи релативно висок проценат жељеза и кварц као главну нечистоћу. У овом раду је представљено истраживање понашања у процесу флокулације ровног природног узорка кварца из Рудника Омарска. Узорак се састоји од кварца који доминира, уз присутност минерала глине и фелдспата, са садржајем SiO2 од 92,9%. Гранулометријска анализа је показала да се ради о финим и ултрафиним честицама. 
Зета-потенцијал зависи од pH вриједности. Експерименти таложења су вршени уз присуство три дисперзанта (Na-хексаметафосфат, Na-пирофосфат и Na-силикат и анјонског полиакриламида као флокуланта. Најбољи резултати су постигнути са Na-хексаметафосфатом (1000 g/t) и анјонским полиакриламидом А 100. Утицај флокуланта на брзину таложења зависи од концентрације чврсте супстанце. Брзина таложења значајно расте са разрјеђењем система у оба случаја (природно таложење италожење у присуству флокуланта).
PB  - Академија наука и умјетности РС
T2  - Contemporary Materials
T1  - Flocculation study of natural quartz sample using anionic polyacrylamide
T1  - Проучавања флокулације узорка природног кварца у присуству анјонског полиакриламида
VL  - 11
IS  - 2
SP  - 112
EP  - 121
DO  - 10.7251/COMEN2002112S
ER  - 

@article{
author = "Sredić, Svjetlana and Tankosić, Ljiljana and Tančić, Pavle and Nedić, Zoran",
year = "2020",
abstract = "The waste sludge generated during processing of iron ore in the Omarska mine (The Republic of Srpska, Bosnia and Herzegovina) is fine-grained (<15μm), containing relatively high concentrations of iron, and quartz as its major impurity. The flocculation behaviour of the primary natural raw “quartz” sample from Omarska mine was studied in the present paper. This sample is composed of major quartz which dominates over minor contents of clay minerals and feldspars, and contain 92.9% of SiO2. Particle size distribution analysis confirm that it is present as fine and ultra-fine particles. The zeta potential of quartz depends on pH value. Settling experiments were performed by using three different dispersants (Na-hexamethaphosphate, Na-pyrophosphate and Na-silicate), and anionic polyacrylamide as flocculants. The best results were achieved with Na-hexametaphosphate (1000 g/t) and anionic polyacrylamide A 100. The effect of a flocculant on the settling rate depends on solid concentration. Settling rates increase significantly with the increase of the liquid component in both cases (natural settling and hindered settling by addition of a flocculant)., Отпадни муљ који настаје у процесу припреме жељезне руде у Руднику Омарска (Република Српска, БиХ) је фине гранулације (< 15 μm), садржи релативно висок проценат жељеза и кварц као главну нечистоћу. У овом раду је представљено истраживање понашања у процесу флокулације ровног природног узорка кварца из Рудника Омарска. Узорак се састоји од кварца који доминира, уз присутност минерала глине и фелдспата, са садржајем SiO2 од 92,9%. Гранулометријска анализа је показала да се ради о финим и ултрафиним честицама. 
Зета-потенцијал зависи од pH вриједности. Експерименти таложења су вршени уз присуство три дисперзанта (Na-хексаметафосфат, Na-пирофосфат и Na-силикат и анјонског полиакриламида као флокуланта. Најбољи резултати су постигнути са Na-хексаметафосфатом (1000 g/t) и анјонским полиакриламидом А 100. Утицај флокуланта на брзину таложења зависи од концентрације чврсте супстанце. Брзина таложења значајно расте са разрјеђењем система у оба случаја (природно таложење италожење у присуству флокуланта).",
publisher = "Академија наука и умјетности РС",
journal = "Contemporary Materials",
title = "Flocculation study of natural quartz sample using anionic polyacrylamide, Проучавања флокулације узорка природног кварца у присуству анјонског полиакриламида",
volume = "11",
number = "2",
pages = "112-121",
doi = "10.7251/COMEN2002112S"
}

Sredić, S., Tankosić, L., Tančić, P.,& Nedić, Z.. (2020). Flocculation study of natural quartz sample using anionic polyacrylamide. in Contemporary Materials
Академија наука и умјетности РС., 11(2), 112-121.
https://doi.org/10.7251/COMEN2002112S

Sredić S, Tankosić L, Tančić P, Nedić Z. Flocculation study of natural quartz sample using anionic polyacrylamide. in Contemporary Materials. 2020;11(2):112-121.
doi:10.7251/COMEN2002112S .

Sredić, Svjetlana, Tankosić, Ljiljana, Tančić, Pavle, Nedić, Zoran, "Flocculation study of natural quartz sample using anionic polyacrylamide" in Contemporary Materials, 11, no. 2 (2020):112-121,
https://doi.org/10.7251/COMEN2002112S . .

TY  - JOUR
AU  - Tankosić, Ljiljana
AU  - Sredić, Svjetlana
AU  - Tančić, Pavle
AU  - Nedić, Zoran
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5906
AB  - In present paper, studied were the dispersion-flocculation behaviour of the primary natural raw „clay samples” from Omarska mine (Republic of Srpska, Bosnia and Herzegovina). Namely, our previous results showed that during the processing of iron ore in the Omarska mine, large quantities of fine sized (<15μm) waste sludge, with relatively high Fe concentrations, were generated. Sludge samples are composed of major goethite and quartz, less clay minerals, and minor magnetite and todorokite. Selective flocculation is one of the methods that can be applied for the separation of fine class iron minerals from impurities and depends on the individual components of the sludge and their behaviour. This paper presents part of the research of the individual components of the sludge. The „clay samples” are composed of major quartz and clay minerals, which dominate over minor contents of feldspars, amphiboles, goethite and hematite. The clay minerals were identified as mostly illite-sericite which prevails over kaolinite, and with chlorites which appears only sporadically. The dispersion-flocculation behaviour was studied by settling and flocculation experiments and Zeta potential measurements. A three different dispersants (sodium-hexametaphosphate, sodium-pyrophosphate and sodium-silicate), and anionic and non-ionic polyacrylamide (PAM) flocculants were used. It was established that the best results were achieved with sodium-hexametaphosphate (1000 g/t) and anionic A100 PAM.
AB  - У раду је проучавано понашање природних ровних узорака глине из Рудника Омарска (Република Српска, БиХ) у процесима дисперзије и флокулације. Приликом прераде руде гвожђа у Руднику Омарска, настаје велика количина ситнозрног отпадног муља (˂ 15 μm), који садржи релативно високе концентрације гвожђа. Наша ранија истраживања су показала да у минералошком саставу муља преовлађују гетит и кварц, мање минерал и глина, и, само минорно, магнетит и тодорокит. Селективна флокулација једна је од метода која може да се примијени за одвајање финих класа минерала гвожђа од примјеса, али она зависи од индивидуалних компоненти муља и њиховог понашања. XРПД, ФТИР и СЕМ-ЕДС анализе смо користили за детаљно одређивање минералошког и хемијског састава фаза присутних у
муљу. Узорци глине се првенствено састоје од кварца и минерала глина, уз много мањи
садржај фелдспата, амфибола, гетита и хематита. Минерални састав глина је идентификован као углавном илитно-серицитни, који преовладава над каолинитом, са
хлоритима који се јављају само спорадично. Испитивано је понашање природне глине
извођењем експеримената таложења и мјерењем зета-потенцијала. Као дисперзанти су
коришћени Na-хексаметафосфат, На-пирофосфат и На-силикат, а као флокуланти
нејонски и анјонски полиакриламиди. Најбољи резултати су постигнути са Nа-хексаметафосфатом (1000г/т) и ањонским полиакриламидом.
PB  - Академија наука и умјетности РС
T2  - Contemporary Materials
T1  - The dispersion-flocculation behaviour of the natural raw clay samples from Omarska mine
T1  - Понашање природних узорака глине из рудника Oмарска у процесима дисперзије и флокулације
VL  - 10
IS  - 1
SP  - 71
EP  - 81
DO  - 10.7251/COMEN1901071T
ER  - 

@article{
author = "Tankosić, Ljiljana and Sredić, Svjetlana and Tančić, Pavle and Nedić, Zoran",
year = "2019",
abstract = "In present paper, studied were the dispersion-flocculation behaviour of the primary natural raw „clay samples” from Omarska mine (Republic of Srpska, Bosnia and Herzegovina). Namely, our previous results showed that during the processing of iron ore in the Omarska mine, large quantities of fine sized (<15μm) waste sludge, with relatively high Fe concentrations, were generated. Sludge samples are composed of major goethite and quartz, less clay minerals, and minor magnetite and todorokite. Selective flocculation is one of the methods that can be applied for the separation of fine class iron minerals from impurities and depends on the individual components of the sludge and their behaviour. This paper presents part of the research of the individual components of the sludge. The „clay samples” are composed of major quartz and clay minerals, which dominate over minor contents of feldspars, amphiboles, goethite and hematite. The clay minerals were identified as mostly illite-sericite which prevails over kaolinite, and with chlorites which appears only sporadically. The dispersion-flocculation behaviour was studied by settling and flocculation experiments and Zeta potential measurements. A three different dispersants (sodium-hexametaphosphate, sodium-pyrophosphate and sodium-silicate), and anionic and non-ionic polyacrylamide (PAM) flocculants were used. It was established that the best results were achieved with sodium-hexametaphosphate (1000 g/t) and anionic A100 PAM., У раду је проучавано понашање природних ровних узорака глине из Рудника Омарска (Република Српска, БиХ) у процесима дисперзије и флокулације. Приликом прераде руде гвожђа у Руднику Омарска, настаје велика количина ситнозрног отпадног муља (˂ 15 μm), који садржи релативно високе концентрације гвожђа. Наша ранија истраживања су показала да у минералошком саставу муља преовлађују гетит и кварц, мање минерал и глина, и, само минорно, магнетит и тодорокит. Селективна флокулација једна је од метода која може да се примијени за одвајање финих класа минерала гвожђа од примјеса, али она зависи од индивидуалних компоненти муља и њиховог понашања. XРПД, ФТИР и СЕМ-ЕДС анализе смо користили за детаљно одређивање минералошког и хемијског састава фаза присутних у
муљу. Узорци глине се првенствено састоје од кварца и минерала глина, уз много мањи
садржај фелдспата, амфибола, гетита и хематита. Минерални састав глина је идентификован као углавном илитно-серицитни, који преовладава над каолинитом, са
хлоритима који се јављају само спорадично. Испитивано је понашање природне глине
извођењем експеримената таложења и мјерењем зета-потенцијала. Као дисперзанти су
коришћени Na-хексаметафосфат, На-пирофосфат и На-силикат, а као флокуланти
нејонски и анјонски полиакриламиди. Најбољи резултати су постигнути са Nа-хексаметафосфатом (1000г/т) и ањонским полиакриламидом.",
publisher = "Академија наука и умјетности РС",
journal = "Contemporary Materials",
title = "The dispersion-flocculation behaviour of the natural raw clay samples from Omarska mine, Понашање природних узорака глине из рудника Oмарска у процесима дисперзије и флокулације",
volume = "10",
number = "1",
pages = "71-81",
doi = "10.7251/COMEN1901071T"
}

Tankosić, L., Sredić, S., Tančić, P.,& Nedić, Z.. (2019). The dispersion-flocculation behaviour of the natural raw clay samples from Omarska mine. in Contemporary Materials
Академија наука и умјетности РС., 10(1), 71-81.
https://doi.org/10.7251/COMEN1901071T

Tankosić L, Sredić S, Tančić P, Nedić Z. The dispersion-flocculation behaviour of the natural raw clay samples from Omarska mine. in Contemporary Materials. 2019;10(1):71-81.
doi:10.7251/COMEN1901071T .

Tankosić, Ljiljana, Sredić, Svjetlana, Tančić, Pavle, Nedić, Zoran, "The dispersion-flocculation behaviour of the natural raw clay samples from Omarska mine" in Contemporary Materials, 10, no. 1 (2019):71-81,
https://doi.org/10.7251/COMEN1901071T . .

TY  - CONF
AU  - Sredić, Svjetlana
AU  - Tankosić, Ljiljana
AU  - Tančić, Pavle
AU  - Nedić, Zoran
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5992
AB  - The waste sludge generated during processing of iron ore in the Omarska mine (Republika Srpska, Bosnia and Herzegovina) is fine-grained (<15μm), containing relatively high concentrations of iron, and quartz as its major impurity. In present paper it was studied the flocculation behaviour of the primary natural raw “quartz” sample from Omarska mine. This sample is composed of major quartz which dominate over minor contents of clay minerals and feldspars, and contain 92.9% of SiO2. Particle size distribution analysis confirm that it is present as fine and ultra-fine particles. The zeta potential of quartz depend on pH value. Settling experiments were performed by using three different dispersants (Na-hexamethaphosphate, Na-pyrophosphate and Na-silicate), and anionic polyacrylamide as flocculants. The best results were achieved with Na-hexametaphosphate (1000 g/t) and anionic polyacrylamide A 100. The effect of flocculant on the settling rate depends on solid concentration. Settling rates increase significantly with the increase of the liquid component in both of the cases (natural settling and hindered settling by addition of flocculant).
PB  - Akademija nauka i umjetnosti Republike Srpske
C3  - XII International Scientific Conference Contemporary Materials 2019
T1  - Flocculation studies of natural quartz sample using anionic polyacrilamide
UR  - https://hdl.handle.net/21.15107/rcub_cer_5992
ER  - 

@conference{
author = "Sredić, Svjetlana and Tankosić, Ljiljana and Tančić, Pavle and Nedić, Zoran",
year = "2019",
abstract = "The waste sludge generated during processing of iron ore in the Omarska mine (Republika Srpska, Bosnia and Herzegovina) is fine-grained (<15μm), containing relatively high concentrations of iron, and quartz as its major impurity. In present paper it was studied the flocculation behaviour of the primary natural raw “quartz” sample from Omarska mine. This sample is composed of major quartz which dominate over minor contents of clay minerals and feldspars, and contain 92.9% of SiO2. Particle size distribution analysis confirm that it is present as fine and ultra-fine particles. The zeta potential of quartz depend on pH value. Settling experiments were performed by using three different dispersants (Na-hexamethaphosphate, Na-pyrophosphate and Na-silicate), and anionic polyacrylamide as flocculants. The best results were achieved with Na-hexametaphosphate (1000 g/t) and anionic polyacrylamide A 100. The effect of flocculant on the settling rate depends on solid concentration. Settling rates increase significantly with the increase of the liquid component in both of the cases (natural settling and hindered settling by addition of flocculant).",
publisher = "Akademija nauka i umjetnosti Republike Srpske",
journal = "XII International Scientific Conference Contemporary Materials 2019",
title = "Flocculation studies of natural quartz sample using anionic polyacrilamide",
url = "https://hdl.handle.net/21.15107/rcub_cer_5992"
}

Sredić, S., Tankosić, L., Tančić, P.,& Nedić, Z.. (2019). Flocculation studies of natural quartz sample using anionic polyacrilamide. in XII International Scientific Conference Contemporary Materials 2019
Akademija nauka i umjetnosti Republike Srpske..
https://hdl.handle.net/21.15107/rcub_cer_5992

Sredić S, Tankosić L, Tančić P, Nedić Z. Flocculation studies of natural quartz sample using anionic polyacrilamide. in XII International Scientific Conference Contemporary Materials 2019. 2019;.
https://hdl.handle.net/21.15107/rcub_cer_5992 .

Sredić, Svjetlana, Tankosić, Ljiljana, Tančić, Pavle, Nedić, Zoran, "Flocculation studies of natural quartz sample using anionic polyacrilamide" in XII International Scientific Conference Contemporary Materials 2019 (2019),
https://hdl.handle.net/21.15107/rcub_cer_5992 .

TY  - CONF
AU  - Mioč, Ubavka
AU  - Davidović, Milorad
AU  - Tančić, Pavle
AU  - Sredić, Svjetlana
AU  - Nedić, Zoran
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5994
AB  - U ovom radu, praćene su fazne transformacije kisele bakarne soli 12-volframfosforne kiseline, tehnikom termogravimetrijske (TGA) i diferencijalne termijske analize (DTA) u temperaturskom intervalu od sobne temperaturedo do 800 oC. Strukturne fazne transformacije praćene su preko karakterističnih traka za kristalnu rešetku u infracrvenim spektrima, kao i rendgenskom difrakcionom analizom praha. Od sobne temperature do 205 oC bakarna so 12-volframfosforne kiseline prolazi kroz proces dehidratacije, koji karakteriše formiranje različitih kristalohidrata. Ovo ukazuje da su sve ove fazne transformacije vezane za promenu lokalne strukture soli heteropoli kiseline, to jest sekundarne strukture Keginovog anjona. Egzotermni pik odgovara procesu rekristalizacije čvrsto-čvrstog stanja, i formiranju nove bakrom dopirane fosfat volframove bronze. Ove strukturne promene jasno su izražene u infracrvenim spektrima i rendgenskim difrakcionim merenjima, što ukazuje na promenu (odnosno rušenje) primarne strukture Keginovog anjona.
PB  - Akademija nauka i umjetnosti Republike Srpske
C3  - XI International scientific conference Contemporary Materials 2018
T1  - Sinteza bakrom dopirane fosfat volframove bronze iz soli 12-volframfosforne kiseline
UR  - https://hdl.handle.net/21.15107/rcub_cer_5994
ER  - 

@conference{
author = "Mioč, Ubavka and Davidović, Milorad and Tančić, Pavle and Sredić, Svjetlana and Nedić, Zoran",
year = "2018",
abstract = "U ovom radu, praćene su fazne transformacije kisele bakarne soli 12-volframfosforne kiseline, tehnikom termogravimetrijske (TGA) i diferencijalne termijske analize (DTA) u temperaturskom intervalu od sobne temperaturedo do 800 oC. Strukturne fazne transformacije praćene su preko karakterističnih traka za kristalnu rešetku u infracrvenim spektrima, kao i rendgenskom difrakcionom analizom praha. Od sobne temperature do 205 oC bakarna so 12-volframfosforne kiseline prolazi kroz proces dehidratacije, koji karakteriše formiranje različitih kristalohidrata. Ovo ukazuje da su sve ove fazne transformacije vezane za promenu lokalne strukture soli heteropoli kiseline, to jest sekundarne strukture Keginovog anjona. Egzotermni pik odgovara procesu rekristalizacije čvrsto-čvrstog stanja, i formiranju nove bakrom dopirane fosfat volframove bronze. Ove strukturne promene jasno su izražene u infracrvenim spektrima i rendgenskim difrakcionim merenjima, što ukazuje na promenu (odnosno rušenje) primarne strukture Keginovog anjona.",
publisher = "Akademija nauka i umjetnosti Republike Srpske",
journal = "XI International scientific conference Contemporary Materials 2018",
title = "Sinteza bakrom dopirane fosfat volframove bronze iz soli 12-volframfosforne kiseline",
url = "https://hdl.handle.net/21.15107/rcub_cer_5994"
}

Mioč, U., Davidović, M., Tančić, P., Sredić, S.,& Nedić, Z.. (2018). Sinteza bakrom dopirane fosfat volframove bronze iz soli 12-volframfosforne kiseline. in XI International scientific conference Contemporary Materials 2018
Akademija nauka i umjetnosti Republike Srpske..
https://hdl.handle.net/21.15107/rcub_cer_5994

Mioč U, Davidović M, Tančić P, Sredić S, Nedić Z. Sinteza bakrom dopirane fosfat volframove bronze iz soli 12-volframfosforne kiseline. in XI International scientific conference Contemporary Materials 2018. 2018;.
https://hdl.handle.net/21.15107/rcub_cer_5994 .

Mioč, Ubavka, Davidović, Milorad, Tančić, Pavle, Sredić, Svjetlana, Nedić, Zoran, "Sinteza bakrom dopirane fosfat volframove bronze iz soli 12-volframfosforne kiseline" in XI International scientific conference Contemporary Materials 2018 (2018),
https://hdl.handle.net/21.15107/rcub_cer_5994 .

TY  - CONF
AU  - Sredić, Svjetlana
AU  - Tankosić, Ljiljana
AU  - Tančić, Pavle
AU  - Nedić, Zoran
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5993
AB  - In present paper there were studied the dispersion-flocculation behaviour of the primary natural raw clay samples from Omarska mine (Republic of Srpska, Bosnia and Herzegovina). During the processing of iron ore in the Omarska mine, large quantities of fine sized (<15µm) waste sludge, with relatively high Fe concentrations, were generated. Our previous results showed that sludge samples are composed of major goethite and quartz, less clay minerals, and minor magnetite and todorokite. Selective flocculation is one of the methods that can be applied for the separation of fine class iron minerals from impurities, and depends on the individual components of the sludge and their behaviour. In order to precisely determine the present mineral phases and their chemical compositions, it was performed XRPD, FTIR and SEM-EDS analysis. The “clay samples” are composed of major quartz and clay minerals which dominate over minor contents of feldspars, amphiboles, goethite and hematite. The clay minerals were identified as mostly illite-sericite which prevails over kaolinite, and with chlorites which appears only sporadically. The dispersion-flocculation behaviour was investigated by settling and flocculation experiments and Zeta potential measurements. A three different dispersants (sodium-hexametaphosphate, sodium-pyrophosphate and sodium-silicate), and anionic and non-ionic polyacrylamide (PAM) flocculants were used. The best results were achieved with sodium-hexametaphosphate (1000g/t) and anionic PAM.
PB  - Akademija nauka i umjetnosti Republike Srpske
C3  - XI International scientific conference Contemporary Materials 2018
T1  - The dispersion-flocculation behaviour of the natural raw clay samples from Omarska mine
UR  - https://hdl.handle.net/21.15107/rcub_cer_5993
ER  - 

@conference{
author = "Sredić, Svjetlana and Tankosić, Ljiljana and Tančić, Pavle and Nedić, Zoran",
year = "2018",
abstract = "In present paper there were studied the dispersion-flocculation behaviour of the primary natural raw clay samples from Omarska mine (Republic of Srpska, Bosnia and Herzegovina). During the processing of iron ore in the Omarska mine, large quantities of fine sized (<15µm) waste sludge, with relatively high Fe concentrations, were generated. Our previous results showed that sludge samples are composed of major goethite and quartz, less clay minerals, and minor magnetite and todorokite. Selective flocculation is one of the methods that can be applied for the separation of fine class iron minerals from impurities, and depends on the individual components of the sludge and their behaviour. In order to precisely determine the present mineral phases and their chemical compositions, it was performed XRPD, FTIR and SEM-EDS analysis. The “clay samples” are composed of major quartz and clay minerals which dominate over minor contents of feldspars, amphiboles, goethite and hematite. The clay minerals were identified as mostly illite-sericite which prevails over kaolinite, and with chlorites which appears only sporadically. The dispersion-flocculation behaviour was investigated by settling and flocculation experiments and Zeta potential measurements. A three different dispersants (sodium-hexametaphosphate, sodium-pyrophosphate and sodium-silicate), and anionic and non-ionic polyacrylamide (PAM) flocculants were used. The best results were achieved with sodium-hexametaphosphate (1000g/t) and anionic PAM.",
publisher = "Akademija nauka i umjetnosti Republike Srpske",
journal = "XI International scientific conference Contemporary Materials 2018",
title = "The dispersion-flocculation behaviour of the natural raw clay samples from Omarska mine",
url = "https://hdl.handle.net/21.15107/rcub_cer_5993"
}

Sredić, S., Tankosić, L., Tančić, P.,& Nedić, Z.. (2018). The dispersion-flocculation behaviour of the natural raw clay samples from Omarska mine. in XI International scientific conference Contemporary Materials 2018
Akademija nauka i umjetnosti Republike Srpske..
https://hdl.handle.net/21.15107/rcub_cer_5993

Sredić S, Tankosić L, Tančić P, Nedić Z. The dispersion-flocculation behaviour of the natural raw clay samples from Omarska mine. in XI International scientific conference Contemporary Materials 2018. 2018;.
https://hdl.handle.net/21.15107/rcub_cer_5993 .

Sredić, Svjetlana, Tankosić, Ljiljana, Tančić, Pavle, Nedić, Zoran, "The dispersion-flocculation behaviour of the natural raw clay samples from Omarska mine" in XI International scientific conference Contemporary Materials 2018 (2018),
https://hdl.handle.net/21.15107/rcub_cer_5993 .

TY  - JOUR
AU  - Tankosić, Ljiljana
AU  - Tančić, Pavle
AU  - Sredić, Svjetlana
AU  - Nedić, Zoran
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5893
AB  - Studied sludge samples are composed of major goethite and quartz; less clay minerals;
and minor magnetite, hematite, clinochlore and todorokite. They have quite similar qualitative,
but different semi-quantitative compositions. There are similar particle size distributions between
the samples, and the highest contents of ~50% belongs to the finest classes of <6  m. Among size classes within the samples, almost identical iron contents are present; indicating their similar mineral compositions, which make these systems very complex for further separation processes. Sludge II has a higher natural settling rate, due to its higher density and mineral composition. With addition of the flocculant, settling rates increase significantly with the increase of the liquid component in both of the samples. The effect of flocculant on the settling rate is different between samples, and depends on their mineral composition. The time of settling does not play a role in selectivity, to the ratio of the mass of floating and sinking parts, and iron content does not change with time. The content of iron partially increases by flocculation; therefore, this method should be considered as an appropriate one. Zeta potential values for sludge are mostly between those for goethite and quartz, indicating their particle mixture and intricately association.
PB  - MDPI
T2  - Minerals
T1  - Comparative Study of the Mineral Composition and Its Connection with Some Properties Important for the Sludge Flocculation Process-Examples from Omarska Mine
VL  - 8
IS  - 3
SP  - 119
DO  - 10.3390/min8030119
ER  - 

@article{
author = "Tankosić, Ljiljana and Tančić, Pavle and Sredić, Svjetlana and Nedić, Zoran",
year = "2018",
abstract = "Studied sludge samples are composed of major goethite and quartz; less clay minerals;
and minor magnetite, hematite, clinochlore and todorokite. They have quite similar qualitative,
but different semi-quantitative compositions. There are similar particle size distributions between
the samples, and the highest contents of ~50% belongs to the finest classes of <6  m. Among size classes within the samples, almost identical iron contents are present; indicating their similar mineral compositions, which make these systems very complex for further separation processes. Sludge II has a higher natural settling rate, due to its higher density and mineral composition. With addition of the flocculant, settling rates increase significantly with the increase of the liquid component in both of the samples. The effect of flocculant on the settling rate is different between samples, and depends on their mineral composition. The time of settling does not play a role in selectivity, to the ratio of the mass of floating and sinking parts, and iron content does not change with time. The content of iron partially increases by flocculation; therefore, this method should be considered as an appropriate one. Zeta potential values for sludge are mostly between those for goethite and quartz, indicating their particle mixture and intricately association.",
publisher = "MDPI",
journal = "Minerals",
title = "Comparative Study of the Mineral Composition and Its Connection with Some Properties Important for the Sludge Flocculation Process-Examples from Omarska Mine",
volume = "8",
number = "3",
pages = "119",
doi = "10.3390/min8030119"
}

Tankosić, L., Tančić, P., Sredić, S.,& Nedić, Z.. (2018). Comparative Study of the Mineral Composition and Its Connection with Some Properties Important for the Sludge Flocculation Process-Examples from Omarska Mine. in Minerals
MDPI., 8(3), 119.
https://doi.org/10.3390/min8030119

Tankosić L, Tančić P, Sredić S, Nedić Z. Comparative Study of the Mineral Composition and Its Connection with Some Properties Important for the Sludge Flocculation Process-Examples from Omarska Mine. in Minerals. 2018;8(3):119.
doi:10.3390/min8030119 .

Tankosić, Ljiljana, Tančić, Pavle, Sredić, Svjetlana, Nedić, Zoran, "Comparative Study of the Mineral Composition and Its Connection with Some Properties Important for the Sludge Flocculation Process-Examples from Omarska Mine" in Minerals, 8, no. 3 (2018):119,
https://doi.org/10.3390/min8030119 . .

TY  - CONF
AU  - Tankosić, Ljiljana
AU  - Tančić, Pavle
AU  - Sredić, Svjetlana
AU  - Nedić, Zoran
AU  - Torbica, Duško
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5971
AB  - This paper presents the results of the study of the particle size distribution of the limonite sludge that occurs as a hydro-cyclone overflow in the Omarska iron mine. The primary role of the precise
characterization of grains of mineral raw material is in obtaining quantitative data about their particle size and analysis of the distribution of mineral grains by volume, which is a necessary step in controlling the processes of the iron ore beneficiation. Since the overflow of the hydro-cyclone size class is -25 μm, in this paper the following methods of sub-sieve analysis are used: sedimentation method-Beaker decantation; pipetting method by Andreasen-Borner; and Warman cyclosizer. Different methods were used in order to analyze the compliance of the results, as well as comparison of them, because expensive and rapid instrumental methods are often unavailable in practice. Also, the content of iron in the sludge varies, so the correlation of iron content with granulometric particle distribution was analyzed. These analyzes were carried out on two samples of sludge with different average iron content (29.43% and 41.19%). On both samples the iron content was determined per size class. The results showed a largest iron content in the smallest classes (-9+6 microns). These results indicate the necessity of applying some of the methods for selectively separating fine particles (such as selective flocculation, for example) in a further process of preparation.
PB  - University of Banja Luka Faculty of Mining Prijedor
PB  - Mining Institute Belgrade Ltd
C3  - Proccedings - 7th Balkan Mining Congress, ‘‘Balkan mining for the friendship and progress,’’ BALKANMINE 2017, October 11-13, 2017, Prijedor
T1  - Particle size distribution of iron ore sludge determined by using different methods and iron content by size class
VL  - 7
IS  - 1
SP  - 129
EP  - 140
DO  - 10.7251/BMC170701129T
ER  - 

@conference{
author = "Tankosić, Ljiljana and Tančić, Pavle and Sredić, Svjetlana and Nedić, Zoran and Torbica, Duško",
year = "2017",
abstract = "This paper presents the results of the study of the particle size distribution of the limonite sludge that occurs as a hydro-cyclone overflow in the Omarska iron mine. The primary role of the precise
characterization of grains of mineral raw material is in obtaining quantitative data about their particle size and analysis of the distribution of mineral grains by volume, which is a necessary step in controlling the processes of the iron ore beneficiation. Since the overflow of the hydro-cyclone size class is -25 μm, in this paper the following methods of sub-sieve analysis are used: sedimentation method-Beaker decantation; pipetting method by Andreasen-Borner; and Warman cyclosizer. Different methods were used in order to analyze the compliance of the results, as well as comparison of them, because expensive and rapid instrumental methods are often unavailable in practice. Also, the content of iron in the sludge varies, so the correlation of iron content with granulometric particle distribution was analyzed. These analyzes were carried out on two samples of sludge with different average iron content (29.43% and 41.19%). On both samples the iron content was determined per size class. The results showed a largest iron content in the smallest classes (-9+6 microns). These results indicate the necessity of applying some of the methods for selectively separating fine particles (such as selective flocculation, for example) in a further process of preparation.",
publisher = "University of Banja Luka Faculty of Mining Prijedor, Mining Institute Belgrade Ltd",
journal = "Proccedings - 7th Balkan Mining Congress, ‘‘Balkan mining for the friendship and progress,’’ BALKANMINE 2017, October 11-13, 2017, Prijedor",
title = "Particle size distribution of iron ore sludge determined by using different methods and iron content by size class",
volume = "7",
number = "1",
pages = "129-140",
doi = "10.7251/BMC170701129T"
}

Tankosić, L., Tančić, P., Sredić, S., Nedić, Z.,& Torbica, D.. (2017). Particle size distribution of iron ore sludge determined by using different methods and iron content by size class. in Proccedings - 7th Balkan Mining Congress, ‘‘Balkan mining for the friendship and progress,’’ BALKANMINE 2017, October 11-13, 2017, Prijedor
University of Banja Luka Faculty of Mining Prijedor., 7(1), 129-140.
https://doi.org/10.7251/BMC170701129T

Tankosić L, Tančić P, Sredić S, Nedić Z, Torbica D. Particle size distribution of iron ore sludge determined by using different methods and iron content by size class. in Proccedings - 7th Balkan Mining Congress, ‘‘Balkan mining for the friendship and progress,’’ BALKANMINE 2017, October 11-13, 2017, Prijedor. 2017;7(1):129-140.
doi:10.7251/BMC170701129T .

Tankosić, Ljiljana, Tančić, Pavle, Sredić, Svjetlana, Nedić, Zoran, Torbica, Duško, "Particle size distribution of iron ore sludge determined by using different methods and iron content by size class" in Proccedings - 7th Balkan Mining Congress, ‘‘Balkan mining for the friendship and progress,’’ BALKANMINE 2017, October 11-13, 2017, Prijedor, 7, no. 1 (2017):129-140,
https://doi.org/10.7251/BMC170701129T . .

TY  - CONF
AU  - Tankosić, Ljiljana
AU  - Tančić, Pavle
AU  - Sredić, Svjetlana
AU  - Nedić, Zoran
AU  - Malbašić, Vladimir
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5962
AB  - In present paper there were studied characteristics of the primary natural raw material samples from Omarska mine (Bosnia and Herzegovina). These materials are labeled as: “limonite ore”, “quartz” and “clay”, and they are main components which occur in the processing of iron ore in Omarska mine. In order to precisely determine the present mineral phases and their chemical compositions, it was performed XRPD, FTIR and SEM-EDS analysis. The XRPD results showed that the “limonite ore” samples are composed of major goethite which dominate over hematite, and with minor contents of magnetite, quartz and clay minerals. The “quartz” samples are composed of major quartz which dominate over minor contents of clay minerals, feldspars and hematite. The “clay samples” are composed of major quartz and clay minerals which dominate over minor contents of feldspars, amphiboles, goethite and hematite. The clay minerals were identified as mostly illite-sericite which prevails over kaolinite, and with chlorites which appears only sporadically. The FTIR and SEM-EDS analysis are in very good agreement and mainly confirms the results obtained by XRPD method.
PB  - Beograd : Rudarski institut Beograd / Belgrade: Mining Institute Belgrade
PB  - Balkanska akademija rudarskih nauka
PB  - Akademija inženjerskih nauka Srbije
C3  - Mining and Geology Today / Rudarstvo i geologija danas, 18-20.09. 2017, Beograd
T1  - Characterization of natural raw materials in the processing of iron ore from Omarska mine
SP  - 316
EP  - 329
DO  - 10.25075/SI.2017.31
ER  - 

@conference{
author = "Tankosić, Ljiljana and Tančić, Pavle and Sredić, Svjetlana and Nedić, Zoran and Malbašić, Vladimir",
year = "2017",
abstract = "In present paper there were studied characteristics of the primary natural raw material samples from Omarska mine (Bosnia and Herzegovina). These materials are labeled as: “limonite ore”, “quartz” and “clay”, and they are main components which occur in the processing of iron ore in Omarska mine. In order to precisely determine the present mineral phases and their chemical compositions, it was performed XRPD, FTIR and SEM-EDS analysis. The XRPD results showed that the “limonite ore” samples are composed of major goethite which dominate over hematite, and with minor contents of magnetite, quartz and clay minerals. The “quartz” samples are composed of major quartz which dominate over minor contents of clay minerals, feldspars and hematite. The “clay samples” are composed of major quartz and clay minerals which dominate over minor contents of feldspars, amphiboles, goethite and hematite. The clay minerals were identified as mostly illite-sericite which prevails over kaolinite, and with chlorites which appears only sporadically. The FTIR and SEM-EDS analysis are in very good agreement and mainly confirms the results obtained by XRPD method.",
publisher = "Beograd : Rudarski institut Beograd / Belgrade: Mining Institute Belgrade, Balkanska akademija rudarskih nauka, Akademija inženjerskih nauka Srbije",
journal = "Mining and Geology Today / Rudarstvo i geologija danas, 18-20.09. 2017, Beograd",
title = "Characterization of natural raw materials in the processing of iron ore from Omarska mine",
pages = "316-329",
doi = "10.25075/SI.2017.31"
}

Tankosić, L., Tančić, P., Sredić, S., Nedić, Z.,& Malbašić, V.. (2017). Characterization of natural raw materials in the processing of iron ore from Omarska mine. in Mining and Geology Today / Rudarstvo i geologija danas, 18-20.09. 2017, Beograd
Beograd : Rudarski institut Beograd / Belgrade: Mining Institute Belgrade., 316-329.
https://doi.org/10.25075/SI.2017.31

Tankosić L, Tančić P, Sredić S, Nedić Z, Malbašić V. Characterization of natural raw materials in the processing of iron ore from Omarska mine. in Mining and Geology Today / Rudarstvo i geologija danas, 18-20.09. 2017, Beograd. 2017;:316-329.
doi:10.25075/SI.2017.31 .

Tankosić, Ljiljana, Tančić, Pavle, Sredić, Svjetlana, Nedić, Zoran, Malbašić, Vladimir, "Characterization of natural raw materials in the processing of iron ore from Omarska mine" in Mining and Geology Today / Rudarstvo i geologija danas, 18-20.09. 2017, Beograd (2017):316-329,
https://doi.org/10.25075/SI.2017.31 . .

TY  - CONF
AU  - Tankosić, Ljiljana
AU  - Tančić, Pavle
AU  - Sredić, Svjetlana
AU  - Nedić, Zoran
PY  - 2017
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5961
AB  - In present paper there were characterized sludge samples generated as an overflow during the processing of iron ore from Omarska mine (Bosnia and Herzegovina). With the aim to improve the utilization of minerals, we are carrying out research into the possibility of selective flocculation of limonite from the sludge. The first and very important step in this research is the characterization of sludge. In order to determine the present mineral phases and their chemical compositions, it was performed XRPD, FTIR and SEM-EDS analysis. The XRPD results showed that sludge samples are composed of major goethite and quartz, less clay minerals, and minor magnetite and todorokite. The FTIR and SEM-EDS analysis are in very good agreement and confirms the results obtained by XRPD method.
PB  - University of Belgrade, Faculty of Mining and Geology, Center for Environmental Engineering
C3  - 6th International Symposium "Mining and Environmental Protection," 21 - 24 June 2017, Vrdnik, Serbia
T1  - Characterization of the sludge generated during the processing of iron ore in Omarska mine
SP  - 255
EP  - 262
UR  - https://hdl.handle.net/21.15107/rcub_cer_5961
ER  - 

@conference{
author = "Tankosić, Ljiljana and Tančić, Pavle and Sredić, Svjetlana and Nedić, Zoran",
year = "2017",
abstract = "In present paper there were characterized sludge samples generated as an overflow during the processing of iron ore from Omarska mine (Bosnia and Herzegovina). With the aim to improve the utilization of minerals, we are carrying out research into the possibility of selective flocculation of limonite from the sludge. The first and very important step in this research is the characterization of sludge. In order to determine the present mineral phases and their chemical compositions, it was performed XRPD, FTIR and SEM-EDS analysis. The XRPD results showed that sludge samples are composed of major goethite and quartz, less clay minerals, and minor magnetite and todorokite. The FTIR and SEM-EDS analysis are in very good agreement and confirms the results obtained by XRPD method.",
publisher = "University of Belgrade, Faculty of Mining and Geology, Center for Environmental Engineering",
journal = "6th International Symposium "Mining and Environmental Protection," 21 - 24 June 2017, Vrdnik, Serbia",
title = "Characterization of the sludge generated during the processing of iron ore in Omarska mine",
pages = "255-262",
url = "https://hdl.handle.net/21.15107/rcub_cer_5961"
}

Tankosić, L., Tančić, P., Sredić, S.,& Nedić, Z.. (2017). Characterization of the sludge generated during the processing of iron ore in Omarska mine. in 6th International Symposium "Mining and Environmental Protection," 21 - 24 June 2017, Vrdnik, Serbia
University of Belgrade, Faculty of Mining and Geology, Center for Environmental Engineering., 255-262.
https://hdl.handle.net/21.15107/rcub_cer_5961

Tankosić L, Tančić P, Sredić S, Nedić Z. Characterization of the sludge generated during the processing of iron ore in Omarska mine. in 6th International Symposium "Mining and Environmental Protection," 21 - 24 June 2017, Vrdnik, Serbia. 2017;:255-262.
https://hdl.handle.net/21.15107/rcub_cer_5961 .

Tankosić, Ljiljana, Tančić, Pavle, Sredić, Svjetlana, Nedić, Zoran, "Characterization of the sludge generated during the processing of iron ore in Omarska mine" in 6th International Symposium "Mining and Environmental Protection," 21 - 24 June 2017, Vrdnik, Serbia (2017):255-262,
https://hdl.handle.net/21.15107/rcub_cer_5961 .