TY  - CONF
AU  - Perić, Marko
AU  - Vuković, George
AU  - Knežević, Sanja
AU  - Nikolić, Milan
AU  - Šuljagić, Marija
AU  - Anđelković, Ljubica
AU  - Nenadović, Snežana
AU  - Ivanović, Marija
AU  - Mirković, Miljana
AU  - Pavlović, Vladmir B.
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/6022
AB  - Radiation shielding is a crucial precautionary measure in decreasing the dose of exposure medical personnel experience. The physical dimensions of these shields, specifically thickness and shape, are dependent on the type of radiation, energy and specific radioactivity. Currently, the most common radiation shielding equipment is made of lead, tungsten or uranium. Although these heavy metals have favorable shielding properties against ionizing radiation, protective garments such as lead aprons are heavy to wear and can pose significant health risks. Taking this into account, the primary goal of this study is to understand the radiation shielding properties of lead-free polymer geopolymer-polyurethane based composites. The geopolymer was synthesized using an 80%-20% mixture of fly ash and a bio-polyol substrate which was subsequently homogenized using MDI44. As a result, 6 samples of the geopolymer-polyurethane based composites were fabricated of which 5 were 90%-10% compositions between the mixture and varying concentrations of BaSO4 and Bi2O3 respectively. The last sample consisted of the pure fly ash/bio-polyol mixture. XRF and ICP analysis was used to chemically characterize the fly ash. The composite structures were analyzed using XRD, while the microstructural morphology was investigated using SEM techniques. Utilizing an energy-dispersive x-ray spectrometer (EDS), elemental abundance and agglomerating behavior was analyzed for each composite variant. The X-ray attenuation measurements pointed out that the obtained composites have the potential for a design of lead-free protective clothing against X-ray shielding in medical applications.
PB  - Bucharest: SRMNIM
C3  - Abstracts E-Book, 10th Balkan Congress of Nuclear Medicine & 5th Romanian Congress of Nuclear Medicine, 15-18 March, 2023, Bucharest, Romania
T1  - Lead Free Polymer Composites for Radiation Shielding
SP  - 17
SP  - 17
UR  - https://hdl.handle.net/21.15107/rcub_cer_6022
ER  - 

@conference{
author = "Perić, Marko and Vuković, George and Knežević, Sanja and Nikolić, Milan and Šuljagić, Marija and Anđelković, Ljubica and Nenadović, Snežana and Ivanović, Marija and Mirković, Miljana and Pavlović, Vladmir B.",
year = "2023",
abstract = "Radiation shielding is a crucial precautionary measure in decreasing the dose of exposure medical personnel experience. The physical dimensions of these shields, specifically thickness and shape, are dependent on the type of radiation, energy and specific radioactivity. Currently, the most common radiation shielding equipment is made of lead, tungsten or uranium. Although these heavy metals have favorable shielding properties against ionizing radiation, protective garments such as lead aprons are heavy to wear and can pose significant health risks. Taking this into account, the primary goal of this study is to understand the radiation shielding properties of lead-free polymer geopolymer-polyurethane based composites. The geopolymer was synthesized using an 80%-20% mixture of fly ash and a bio-polyol substrate which was subsequently homogenized using MDI44. As a result, 6 samples of the geopolymer-polyurethane based composites were fabricated of which 5 were 90%-10% compositions between the mixture and varying concentrations of BaSO4 and Bi2O3 respectively. The last sample consisted of the pure fly ash/bio-polyol mixture. XRF and ICP analysis was used to chemically characterize the fly ash. The composite structures were analyzed using XRD, while the microstructural morphology was investigated using SEM techniques. Utilizing an energy-dispersive x-ray spectrometer (EDS), elemental abundance and agglomerating behavior was analyzed for each composite variant. The X-ray attenuation measurements pointed out that the obtained composites have the potential for a design of lead-free protective clothing against X-ray shielding in medical applications.",
publisher = "Bucharest: SRMNIM",
journal = "Abstracts E-Book, 10th Balkan Congress of Nuclear Medicine & 5th Romanian Congress of Nuclear Medicine, 15-18 March, 2023, Bucharest, Romania",
title = "Lead Free Polymer Composites for Radiation Shielding",
pages = "17-17",
url = "https://hdl.handle.net/21.15107/rcub_cer_6022"
}

Perić, M., Vuković, G., Knežević, S., Nikolić, M., Šuljagić, M., Anđelković, L., Nenadović, S., Ivanović, M., Mirković, M.,& Pavlović, V. B.. (2023). Lead Free Polymer Composites for Radiation Shielding. in Abstracts E-Book, 10th Balkan Congress of Nuclear Medicine & 5th Romanian Congress of Nuclear Medicine, 15-18 March, 2023, Bucharest, Romania
Bucharest: SRMNIM., 17.
https://hdl.handle.net/21.15107/rcub_cer_6022

Perić M, Vuković G, Knežević S, Nikolić M, Šuljagić M, Anđelković L, Nenadović S, Ivanović M, Mirković M, Pavlović VB. Lead Free Polymer Composites for Radiation Shielding. in Abstracts E-Book, 10th Balkan Congress of Nuclear Medicine & 5th Romanian Congress of Nuclear Medicine, 15-18 March, 2023, Bucharest, Romania. 2023;:17.
https://hdl.handle.net/21.15107/rcub_cer_6022 .

Perić, Marko, Vuković, George, Knežević, Sanja, Nikolić, Milan, Šuljagić, Marija, Anđelković, Ljubica, Nenadović, Snežana, Ivanović, Marija, Mirković, Miljana, Pavlović, Vladmir B., "Lead Free Polymer Composites for Radiation Shielding" in Abstracts E-Book, 10th Balkan Congress of Nuclear Medicine & 5th Romanian Congress of Nuclear Medicine, 15-18 March, 2023, Bucharest, Romania (2023):17,
https://hdl.handle.net/21.15107/rcub_cer_6022 .

TY  - JOUR
AU  - Egerić, Marija
AU  - Smičiklas, Ivana
AU  - Dojčinović, Biljana
AU  - Sikirić, Biljana
AU  - Jović, Mihajlo
AU  - Šljivić-Ivanović, Marija
AU  - Čakmak, Dragan
PY  - 2019
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3125
AB  - Liming is a common practice in the treatment of acidic and metal contaminated soils, aiming at pH regulation, enhancing of the nutrient availability and attenuation of trace metals mobility. Replacement of natural limestone with alternative soil alkalizers found among waste materials represents a step towards sustainable resource management and reduced waste storage. In this study, waste seashells (SW) and red mud (RM) were applied in different doses to the soil sampled in the vicinity of mining and smelting complex. The soil was characterized by acidic reaction (pH 4.93), increased Cu concentration (219.2 mg/kg) and a very low level of P-supply (3.61 mg P2O5/100 g). The study aimed to quantify and compare additive-induced effects onto soil physicochemical properties, the status of macronutrients and distribution of trace metals. Targeted effect on soil pH was achieved with SW dose of 0.3% and RM dose of 2%. RM was found to be a source of available P and gave rise to the available P concentrations in the soil. Medium level of P-supply (15.60 mg P2O5/100 g) was achieved with RM dose of 5%, however, the increase in soil salinity and total trace elements concentrations have become significant adverse effects at such dose. The decrease in the ion-exchangeable content of Cu and other trace metals was in correlation with the increase in soil pH after the treatments. Redistribution of metal cations was mainly directed to carbonate/acid soluble and Fe, Mn-oxide bonded fraction after SW addition. Even though trace metals concentration has increased in the soil after application of the RM, they were principally found in the residual fraction. The results emphasize low amounts of contained trace elements and lower doses for achieving targeted effects on pH and metal mobility as the main benefits of SW treatments. On the other hand, moderate and controlled use of RM may represent multiple benefits in terms of simultaneous pH regulation, P-supply, and reduced trace metals mobility.
PB  - Elsevier
T2  - Geoderma
T1  - Interactions of acidic soil near copper mining and smelting complex and waste-derived alkaline additives
VL  - 352
SP  - 241
EP  - 250
DO  - 10.1016/j.geoderma.2019.06.015
ER  - 

@article{
author = "Egerić, Marija and Smičiklas, Ivana and Dojčinović, Biljana and Sikirić, Biljana and Jović, Mihajlo and Šljivić-Ivanović, Marija and Čakmak, Dragan",
year = "2019",
abstract = "Liming is a common practice in the treatment of acidic and metal contaminated soils, aiming at pH regulation, enhancing of the nutrient availability and attenuation of trace metals mobility. Replacement of natural limestone with alternative soil alkalizers found among waste materials represents a step towards sustainable resource management and reduced waste storage. In this study, waste seashells (SW) and red mud (RM) were applied in different doses to the soil sampled in the vicinity of mining and smelting complex. The soil was characterized by acidic reaction (pH 4.93), increased Cu concentration (219.2 mg/kg) and a very low level of P-supply (3.61 mg P2O5/100 g). The study aimed to quantify and compare additive-induced effects onto soil physicochemical properties, the status of macronutrients and distribution of trace metals. Targeted effect on soil pH was achieved with SW dose of 0.3% and RM dose of 2%. RM was found to be a source of available P and gave rise to the available P concentrations in the soil. Medium level of P-supply (15.60 mg P2O5/100 g) was achieved with RM dose of 5%, however, the increase in soil salinity and total trace elements concentrations have become significant adverse effects at such dose. The decrease in the ion-exchangeable content of Cu and other trace metals was in correlation with the increase in soil pH after the treatments. Redistribution of metal cations was mainly directed to carbonate/acid soluble and Fe, Mn-oxide bonded fraction after SW addition. Even though trace metals concentration has increased in the soil after application of the RM, they were principally found in the residual fraction. The results emphasize low amounts of contained trace elements and lower doses for achieving targeted effects on pH and metal mobility as the main benefits of SW treatments. On the other hand, moderate and controlled use of RM may represent multiple benefits in terms of simultaneous pH regulation, P-supply, and reduced trace metals mobility.",
publisher = "Elsevier",
journal = "Geoderma",
title = "Interactions of acidic soil near copper mining and smelting complex and waste-derived alkaline additives",
volume = "352",
pages = "241-250",
doi = "10.1016/j.geoderma.2019.06.015"
}

Egerić, M., Smičiklas, I., Dojčinović, B., Sikirić, B., Jović, M., Šljivić-Ivanović, M.,& Čakmak, D.. (2019). Interactions of acidic soil near copper mining and smelting complex and waste-derived alkaline additives. in Geoderma
Elsevier., 352, 241-250.
https://doi.org/10.1016/j.geoderma.2019.06.015

Egerić M, Smičiklas I, Dojčinović B, Sikirić B, Jović M, Šljivić-Ivanović M, Čakmak D. Interactions of acidic soil near copper mining and smelting complex and waste-derived alkaline additives. in Geoderma. 2019;352:241-250.
doi:10.1016/j.geoderma.2019.06.015 .

Egerić, Marija, Smičiklas, Ivana, Dojčinović, Biljana, Sikirić, Biljana, Jović, Mihajlo, Šljivić-Ivanović, Marija, Čakmak, Dragan, "Interactions of acidic soil near copper mining and smelting complex and waste-derived alkaline additives" in Geoderma, 352 (2019):241-250,
https://doi.org/10.1016/j.geoderma.2019.06.015 . .