TY  - CONF
AU  - Milićević, Sonja
AU  - Martinović, Sanja
AU  - Kanari, Ndue
AU  - Vlahović, Milica
AU  - Diot, Frederic
AU  - Popović, Ana
AU  - Kojić, Marija
AU  - Šešlija, Sanja
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5983
AB  - Recent investigations are focused on the possibility of waste utilization as potential adsorbents in wastewater treatments. Industrial by-products and wastes are almost zero-cost raw materials and at the same time, their utilization can contribute to the solution of management problem by improving the material efficiency within several industrial activities. Fly ash as a potential hazardous solid waste produced like a by–product in power plants worldwide in a million tons has attracted researches interest for years. Fly ash has potential application in wastewater treatment because of its major chemical components (alumina, silica, ferric oxide, calcium oxide, magnesium oxide, and carbon), and its physical properties such as porosity and large surface area. However, the micron particle size distribution of the fly ash (0.5 μm to 200 μm) that gives fly ash poor hydraulic properties is the one that limits the use of this material in wastewater treatments. This obstacle can be effectively overcome through the agglomeration process such as pelletization.  Fly ash can be efficiently pelletized using cement as a binder. For the production of pellets with satisfying mechanical properties, the required amount of cement as a binder is 10 %.  The dosage of plasticizer up to 3 % in relation to the amount of the cement, additionally improves the mechanical properties. Under the investigated pelletizing conditions, more than 80 % of the obtained pellets are suitable for the application in continuous systems for wastewater purification, form the particle size distribution point of view (1.0-5.0 mm). Obtained pelletized fly ash has been used as a sorbent for copper removal in a batch system. Copper adsorption by fly ash was examined using a range of initial Cu concentrations (25.0 to 600.0 mg/dm3). Solid liquid ratio was 100, and the investigated contact time was 120 min. After equilibration, all suspensions were centrifuged and the concentrations of the remaining Cu in supernatants were determined using AAS. The obtained results indicate that the rise of initial concentration leads to the higher adsorbed amount of the copper. The experimental data were analyzed using the Langmuir sorption model. According to this model, maximum adsorption capacity for copper removal by pelletized fly ash is 25.64 mg/g and this is almost 3 times higher capacity compared to the one non-pelletized (8.85 mg/g). The presence of cement leads to a higher pH value in the reaction solution (5.5-6.0) than in the one with micronized fly ash (4.6-5.1) and this higher pH values noticeably influence the removal efficiency.
PB  - Association of Metallurgical Engineers of Serbia (AMES)
C3  - Book of abstracts - Metallurgical and Materials & Engineering Congress of South East Europe - MME SEE 2019, June 5-7 2019, Belgrade, Serbia
T1  - Removal of copper by pelletized fly ash
SP  - 64
EP  - 64
UR  - https://hdl.handle.net/21.15107/rcub_cer_5983
ER  - 

@conference{
author = "Milićević, Sonja and Martinović, Sanja and Kanari, Ndue and Vlahović, Milica and Diot, Frederic and Popović, Ana and Kojić, Marija and Šešlija, Sanja",
year = "2019",
abstract = "Recent investigations are focused on the possibility of waste utilization as potential adsorbents in wastewater treatments. Industrial by-products and wastes are almost zero-cost raw materials and at the same time, their utilization can contribute to the solution of management problem by improving the material efficiency within several industrial activities. Fly ash as a potential hazardous solid waste produced like a by–product in power plants worldwide in a million tons has attracted researches interest for years. Fly ash has potential application in wastewater treatment because of its major chemical components (alumina, silica, ferric oxide, calcium oxide, magnesium oxide, and carbon), and its physical properties such as porosity and large surface area. However, the micron particle size distribution of the fly ash (0.5 μm to 200 μm) that gives fly ash poor hydraulic properties is the one that limits the use of this material in wastewater treatments. This obstacle can be effectively overcome through the agglomeration process such as pelletization.  Fly ash can be efficiently pelletized using cement as a binder. For the production of pellets with satisfying mechanical properties, the required amount of cement as a binder is 10 %.  The dosage of plasticizer up to 3 % in relation to the amount of the cement, additionally improves the mechanical properties. Under the investigated pelletizing conditions, more than 80 % of the obtained pellets are suitable for the application in continuous systems for wastewater purification, form the particle size distribution point of view (1.0-5.0 mm). Obtained pelletized fly ash has been used as a sorbent for copper removal in a batch system. Copper adsorption by fly ash was examined using a range of initial Cu concentrations (25.0 to 600.0 mg/dm3). Solid liquid ratio was 100, and the investigated contact time was 120 min. After equilibration, all suspensions were centrifuged and the concentrations of the remaining Cu in supernatants were determined using AAS. The obtained results indicate that the rise of initial concentration leads to the higher adsorbed amount of the copper. The experimental data were analyzed using the Langmuir sorption model. According to this model, maximum adsorption capacity for copper removal by pelletized fly ash is 25.64 mg/g and this is almost 3 times higher capacity compared to the one non-pelletized (8.85 mg/g). The presence of cement leads to a higher pH value in the reaction solution (5.5-6.0) than in the one with micronized fly ash (4.6-5.1) and this higher pH values noticeably influence the removal efficiency.",
publisher = "Association of Metallurgical Engineers of Serbia (AMES)",
journal = "Book of abstracts - Metallurgical and Materials & Engineering Congress of South East Europe - MME SEE 2019, June 5-7 2019, Belgrade, Serbia",
title = "Removal of copper by pelletized fly ash",
pages = "64-64",
url = "https://hdl.handle.net/21.15107/rcub_cer_5983"
}

Milićević, S., Martinović, S., Kanari, N., Vlahović, M., Diot, F., Popović, A., Kojić, M.,& Šešlija, S.. (2019). Removal of copper by pelletized fly ash. in Book of abstracts - Metallurgical and Materials & Engineering Congress of South East Europe - MME SEE 2019, June 5-7 2019, Belgrade, Serbia
Association of Metallurgical Engineers of Serbia (AMES)., 64-64.
https://hdl.handle.net/21.15107/rcub_cer_5983

Milićević S, Martinović S, Kanari N, Vlahović M, Diot F, Popović A, Kojić M, Šešlija S. Removal of copper by pelletized fly ash. in Book of abstracts - Metallurgical and Materials & Engineering Congress of South East Europe - MME SEE 2019, June 5-7 2019, Belgrade, Serbia. 2019;:64-64.
https://hdl.handle.net/21.15107/rcub_cer_5983 .

Milićević, Sonja, Martinović, Sanja, Kanari, Ndue, Vlahović, Milica, Diot, Frederic, Popović, Ana, Kojić, Marija, Šešlija, Sanja, "Removal of copper by pelletized fly ash" in Book of abstracts - Metallurgical and Materials & Engineering Congress of South East Europe - MME SEE 2019, June 5-7 2019, Belgrade, Serbia (2019):64-64,
https://hdl.handle.net/21.15107/rcub_cer_5983 .

TY  - CONF
AU  - Milićević, Sonja
AU  - Martinović, Sanja
AU  - Jovanović, Vladimir
AU  - Vlahović, Milica
AU  - Kanari, Ndue
AU  - Popović, Ana
AU  - Kojić, Marija
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5949
AB  - This paper covers the results of pelletizing fly ash in order to obtain pellets, with satisfied mechanical properties, that can be used in wastewater treatments. Serbian fly ash from
“Nikola Tesla” power plant was used as a low cost sorbent. Fly ash was subjected to elementary
and XRD analysis. Portland cement was used as a pelletizing agent along with the plastification agent. The mechanical properties of pellets were investigated using different methods such as: pressure resistance, impact resistance, resistance to abrasion, and disintegration in water. The best results were obtained with the addition of 10 % of cement along with the plasticizer.
PB  - University of Belgrade, Technical Faculty Bor
C3  - Proceedings - XIII International Mineral Processing and Recycling Conference, May 8-10, 2019, Belgrade, Serbia
T1  - Development and mechanical properties of the pelletized fly ash
SP  - 38
EP  - 44
UR  - https://hdl.handle.net/21.15107/rcub_cer_5949
ER  - 

@conference{
author = "Milićević, Sonja and Martinović, Sanja and Jovanović, Vladimir and Vlahović, Milica and Kanari, Ndue and Popović, Ana and Kojić, Marija",
year = "2019",
abstract = "This paper covers the results of pelletizing fly ash in order to obtain pellets, with satisfied mechanical properties, that can be used in wastewater treatments. Serbian fly ash from
“Nikola Tesla” power plant was used as a low cost sorbent. Fly ash was subjected to elementary
and XRD analysis. Portland cement was used as a pelletizing agent along with the plastification agent. The mechanical properties of pellets were investigated using different methods such as: pressure resistance, impact resistance, resistance to abrasion, and disintegration in water. The best results were obtained with the addition of 10 % of cement along with the plasticizer.",
publisher = "University of Belgrade, Technical Faculty Bor",
journal = "Proceedings - XIII International Mineral Processing and Recycling Conference, May 8-10, 2019, Belgrade, Serbia",
title = "Development and mechanical properties of the pelletized fly ash",
pages = "38-44",
url = "https://hdl.handle.net/21.15107/rcub_cer_5949"
}

Milićević, S., Martinović, S., Jovanović, V., Vlahović, M., Kanari, N., Popović, A.,& Kojić, M.. (2019). Development and mechanical properties of the pelletized fly ash. in Proceedings - XIII International Mineral Processing and Recycling Conference, May 8-10, 2019, Belgrade, Serbia
University of Belgrade, Technical Faculty Bor., 38-44.
https://hdl.handle.net/21.15107/rcub_cer_5949

Milićević S, Martinović S, Jovanović V, Vlahović M, Kanari N, Popović A, Kojić M. Development and mechanical properties of the pelletized fly ash. in Proceedings - XIII International Mineral Processing and Recycling Conference, May 8-10, 2019, Belgrade, Serbia. 2019;:38-44.
https://hdl.handle.net/21.15107/rcub_cer_5949 .

Milićević, Sonja, Martinović, Sanja, Jovanović, Vladimir, Vlahović, Milica, Kanari, Ndue, Popović, Ana, Kojić, Marija, "Development and mechanical properties of the pelletized fly ash" in Proceedings - XIII International Mineral Processing and Recycling Conference, May 8-10, 2019, Belgrade, Serbia (2019):38-44,
https://hdl.handle.net/21.15107/rcub_cer_5949 .

TY  - CONF
AU  - Milićević, Sonja
AU  - Martinović, Sanja
AU  - Vlahović, Milica
AU  - Kanari, Ndue
AU  - Diot, Frederic
AU  - Popović, Ana
AU  - Kojić, Marija
AU  - Yvon, Jacque
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5966
AB  - This study is occupied by using fly ash for copper removal from the acid mine wastewater and a synthetic solution of similar composition. Chemical analysis of mine wastewater proved that the values of Cu, Zn, Fe, and Mn exceed the maximum accepted concentration in a large extent. Serbian fly ash from the “Nikola Tesla” power plant was used as a low-cost sorbent for the removal of copper ions (Cu2+) from aqueous solutions. Fly ash was subjected to elementary and XRD analysis. As a method, a batch sorption procedure was applied. Sorption efficiency was studied as a function of the contact time, and amount of the sorbent. Equilibrium was determined after 90 min for all investigated sorbent dosages.
PB  - University of Belgrade, Technical Faculty in Bor
C3  - Proceedings - 26th International Conference Ecological Truth and Environmental Research-EcoTer 18, June 12-1, 2018, Borsko jezero, Serbia
T1  - Sorption of copper by fly ash
SP  - 332
EP  - 337
UR  - https://hdl.handle.net/21.15107/rcub_cer_5966
ER  - 

@conference{
author = "Milićević, Sonja and Martinović, Sanja and Vlahović, Milica and Kanari, Ndue and Diot, Frederic and Popović, Ana and Kojić, Marija and Yvon, Jacque",
year = "2018",
abstract = "This study is occupied by using fly ash for copper removal from the acid mine wastewater and a synthetic solution of similar composition. Chemical analysis of mine wastewater proved that the values of Cu, Zn, Fe, and Mn exceed the maximum accepted concentration in a large extent. Serbian fly ash from the “Nikola Tesla” power plant was used as a low-cost sorbent for the removal of copper ions (Cu2+) from aqueous solutions. Fly ash was subjected to elementary and XRD analysis. As a method, a batch sorption procedure was applied. Sorption efficiency was studied as a function of the contact time, and amount of the sorbent. Equilibrium was determined after 90 min for all investigated sorbent dosages.",
publisher = "University of Belgrade, Technical Faculty in Bor",
journal = "Proceedings - 26th International Conference Ecological Truth and Environmental Research-EcoTer 18, June 12-1, 2018, Borsko jezero, Serbia",
title = "Sorption of copper by fly ash",
pages = "332-337",
url = "https://hdl.handle.net/21.15107/rcub_cer_5966"
}

Milićević, S., Martinović, S., Vlahović, M., Kanari, N., Diot, F., Popović, A., Kojić, M.,& Yvon, J.. (2018). Sorption of copper by fly ash. in Proceedings - 26th International Conference Ecological Truth and Environmental Research-EcoTer 18, June 12-1, 2018, Borsko jezero, Serbia
University of Belgrade, Technical Faculty in Bor., 332-337.
https://hdl.handle.net/21.15107/rcub_cer_5966

Milićević S, Martinović S, Vlahović M, Kanari N, Diot F, Popović A, Kojić M, Yvon J. Sorption of copper by fly ash. in Proceedings - 26th International Conference Ecological Truth and Environmental Research-EcoTer 18, June 12-1, 2018, Borsko jezero, Serbia. 2018;:332-337.
https://hdl.handle.net/21.15107/rcub_cer_5966 .

Milićević, Sonja, Martinović, Sanja, Vlahović, Milica, Kanari, Ndue, Diot, Frederic, Popović, Ana, Kojić, Marija, Yvon, Jacque, "Sorption of copper by fly ash" in Proceedings - 26th International Conference Ecological Truth and Environmental Research-EcoTer 18, June 12-1, 2018, Borsko jezero, Serbia (2018):332-337,
https://hdl.handle.net/21.15107/rcub_cer_5966 .

TY  - CONF
AU  - Kanari, Ndue
AU  - Diot, Frederic
AU  - Milićević, Sonja
AU  - Martinović, Sanja
AU  - Vlahović, Milica
AU  - Yvon, Jacque
PY  - 2018
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/5967
AB  - Diverse industries produce fly ashes as thermal power plants, waste incinerators, and some recycling processes. Though some of these products can be raw materials for diverse applications, their composition can be hazardous due to their content in heavy metals. In addition, mixing fly ashes with the products of neutralization of fumes complicates the products. Then many fly ashes are landfilled in a Portland-cement matrix. However, most of the actual knowledge about their ageing derives from models the validity of which has been established only on the short term, using small sized proofs, at room conditions while matter transfers and reactions are strongly affected by temperatures reaching 80 °C for many years. Ageing leads to a mobility of chlorides, sulphates and lead, alteration of textural properties with formation of microcracks, formation of neo-formed minerals as silicatehydrates (katoite and hibschite, CSH), carbonates, tobermorite, hydrogarnets zeolites,…) that can contribute to bear Pb, Zn, Cr, Cu, in addition to inherited phases (metallic alloys, spinels, glasses, refractory oxides, titanates, phosphates,…). The alkaline hydrolysis of aluminium in saline media decreases the pH and promotes the precipitation of lead species trapped in a hydrocalumite or ettringite matrix.
PB  - University of Belgrade, Technical Faculty in Bor
C3  - Proceedings - 26th International Conference Ecological Truth and Environmental Research-EcoTer 18, June 12-1, 2018, Borsko jezero, Serbia
T1  - Characteristics of fly ashes, their potential uses and damaged conditions of landfill deposits
SP  - 326
EP  - 331
UR  - https://hdl.handle.net/21.15107/rcub_cer_5967
ER  - 

@conference{
author = "Kanari, Ndue and Diot, Frederic and Milićević, Sonja and Martinović, Sanja and Vlahović, Milica and Yvon, Jacque",
year = "2018",
abstract = "Diverse industries produce fly ashes as thermal power plants, waste incinerators, and some recycling processes. Though some of these products can be raw materials for diverse applications, their composition can be hazardous due to their content in heavy metals. In addition, mixing fly ashes with the products of neutralization of fumes complicates the products. Then many fly ashes are landfilled in a Portland-cement matrix. However, most of the actual knowledge about their ageing derives from models the validity of which has been established only on the short term, using small sized proofs, at room conditions while matter transfers and reactions are strongly affected by temperatures reaching 80 °C for many years. Ageing leads to a mobility of chlorides, sulphates and lead, alteration of textural properties with formation of microcracks, formation of neo-formed minerals as silicatehydrates (katoite and hibschite, CSH), carbonates, tobermorite, hydrogarnets zeolites,…) that can contribute to bear Pb, Zn, Cr, Cu, in addition to inherited phases (metallic alloys, spinels, glasses, refractory oxides, titanates, phosphates,…). The alkaline hydrolysis of aluminium in saline media decreases the pH and promotes the precipitation of lead species trapped in a hydrocalumite or ettringite matrix.",
publisher = "University of Belgrade, Technical Faculty in Bor",
journal = "Proceedings - 26th International Conference Ecological Truth and Environmental Research-EcoTer 18, June 12-1, 2018, Borsko jezero, Serbia",
title = "Characteristics of fly ashes, their potential uses and damaged conditions of landfill deposits",
pages = "326-331",
url = "https://hdl.handle.net/21.15107/rcub_cer_5967"
}

Kanari, N., Diot, F., Milićević, S., Martinović, S., Vlahović, M.,& Yvon, J.. (2018). Characteristics of fly ashes, their potential uses and damaged conditions of landfill deposits. in Proceedings - 26th International Conference Ecological Truth and Environmental Research-EcoTer 18, June 12-1, 2018, Borsko jezero, Serbia
University of Belgrade, Technical Faculty in Bor., 326-331.
https://hdl.handle.net/21.15107/rcub_cer_5967

Kanari N, Diot F, Milićević S, Martinović S, Vlahović M, Yvon J. Characteristics of fly ashes, their potential uses and damaged conditions of landfill deposits. in Proceedings - 26th International Conference Ecological Truth and Environmental Research-EcoTer 18, June 12-1, 2018, Borsko jezero, Serbia. 2018;:326-331.
https://hdl.handle.net/21.15107/rcub_cer_5967 .

Kanari, Ndue, Diot, Frederic, Milićević, Sonja, Martinović, Sanja, Vlahović, Milica, Yvon, Jacque, "Characteristics of fly ashes, their potential uses and damaged conditions of landfill deposits" in Proceedings - 26th International Conference Ecological Truth and Environmental Research-EcoTer 18, June 12-1, 2018, Borsko jezero, Serbia (2018):326-331,
https://hdl.handle.net/21.15107/rcub_cer_5967 .