TY  - JOUR
AU  - Sljivic-Ivanovic, Marija Z
AU  - Smiciklas, Ivana D
AU  - Dimović, Slavko
AU  - Jovic, Mihajlo D
AU  - Dojčinović, Biljana
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1823
AB  - The problem of simultaneous removal of Co2+, Sr2+, and Cs+ ions from aqueous solutions was addressed using oxide, phosphate, and aluminosilicate materials from economical and abundant sources. Competition between cations was analyzed by the following approaches: (i) the addition of each sorbent separately to variously concentrated cation mixtures (using simplex lattice experimental design methodology), (ii) the application of mixture sorbents (using extreme vertices:experimental design), and consecutive addition of sorbents in varying order. Investigated materials exhibited different selectivity for Co2+ Sr2+, and CS+ in the mixture; thus combination of materials in one-step sorption, or successive addition of sorbents in a multistep process, lead to better removal efficiency. Regression equations obtained by statistical analysis satisfactorily predicted sorbed amounts of cations as a function of both the composition of mixed waste and the composition of mixed sorbent. Mixture designs should be considered as useful tools for getting better insight into the complex sorption processes.
PB  - American Chemical Society (ACS)
T2  - Industrial and Engineering Chemistry Research
T1  - Study of Simultaneous Radionuclide Sorption by Mixture Design Methodology
VL  - 54
IS  - 44
SP  - 11212
EP  - 11221
DO  - 10.1021/acs.iecr.5b03448
ER  - 

@article{
author = "Sljivic-Ivanovic, Marija Z and Smiciklas, Ivana D and Dimović, Slavko and Jovic, Mihajlo D and Dojčinović, Biljana",
year = "2015",
abstract = "The problem of simultaneous removal of Co2+, Sr2+, and Cs+ ions from aqueous solutions was addressed using oxide, phosphate, and aluminosilicate materials from economical and abundant sources. Competition between cations was analyzed by the following approaches: (i) the addition of each sorbent separately to variously concentrated cation mixtures (using simplex lattice experimental design methodology), (ii) the application of mixture sorbents (using extreme vertices:experimental design), and consecutive addition of sorbents in varying order. Investigated materials exhibited different selectivity for Co2+ Sr2+, and CS+ in the mixture; thus combination of materials in one-step sorption, or successive addition of sorbents in a multistep process, lead to better removal efficiency. Regression equations obtained by statistical analysis satisfactorily predicted sorbed amounts of cations as a function of both the composition of mixed waste and the composition of mixed sorbent. Mixture designs should be considered as useful tools for getting better insight into the complex sorption processes.",
publisher = "American Chemical Society (ACS)",
journal = "Industrial and Engineering Chemistry Research",
title = "Study of Simultaneous Radionuclide Sorption by Mixture Design Methodology",
volume = "54",
number = "44",
pages = "11212-11221",
doi = "10.1021/acs.iecr.5b03448"
}

Sljivic-Ivanovic, M. Z., Smiciklas, I. D., Dimović, S., Jovic, M. D.,& Dojčinović, B.. (2015). Study of Simultaneous Radionuclide Sorption by Mixture Design Methodology. in Industrial and Engineering Chemistry Research
American Chemical Society (ACS)., 54(44), 11212-11221.
https://doi.org/10.1021/acs.iecr.5b03448

Sljivic-Ivanovic MZ, Smiciklas ID, Dimović S, Jovic MD, Dojčinović B. Study of Simultaneous Radionuclide Sorption by Mixture Design Methodology. in Industrial and Engineering Chemistry Research. 2015;54(44):11212-11221.
doi:10.1021/acs.iecr.5b03448 .

Sljivic-Ivanovic, Marija Z, Smiciklas, Ivana D, Dimović, Slavko, Jovic, Mihajlo D, Dojčinović, Biljana, "Study of Simultaneous Radionuclide Sorption by Mixture Design Methodology" in Industrial and Engineering Chemistry Research, 54, no. 44 (2015):11212-11221,
https://doi.org/10.1021/acs.iecr.5b03448 . .

TY  - JOUR
AU  - Sljivic-Ivanovic, M
AU  - Smiciklas, I
AU  - Milenkovic, A
AU  - Dojčinović, Biljana
AU  - Babić, Biljana M.
AU  - Mitrić, Miodrag
PY  - 2015
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1741
AB  - Animal bones have been studied as a resource of low-crystalline apatite for immobilization of toxic heavy metals. Chemical and thermal treatments can be applied for selective removal of bone organic constituents. In this study, the impact of different treatment factors was determined by experimental design methodology, and comparison of the estimated effects was performed in order to optimize the treatment conditions. Fractional factorial design with five variables at two levels was applied for factors screening. The type of chemical reagent (H2O2 or NaOH), its concentration (0.1 or 2 mol/L), reaction temperature (20 or 60 degrees C), contact time (1 or 3 h) and sample annealing (without or at 400 degrees C) were considered as process variables. Structural properties of bone sorbents, loss of ignition, point of zero charge, surface functional groups, specific surface area, chemical composition, and Cd2+ sorption efficiency, were selected as system responses. Samples significantly differed in respect to the organic phase content and composition, thus mechanisms of Cd2+ sorption were complex. Statistical analysis has revealed that, between all studied factors, temperature treatment was the most important for sorbents increased specific surface area, porosity and cation sorption. Furthermore, NaOH was more effective than H2O2, while the effects produced by variation of other factors were less pronounced. The highest proportion of bio-apatite with desired low crystallinity and high specific surface area was achieved by synergetic effects of chemical treatment with NaOH and thermal treatment at 400 degrees C.
PB  - Springer, New York
T2  - Journal of Materials Science
T1  - Evaluation of the effects of treatment factors on the properties of bio-apatite materials
VL  - 50
IS  - 1
SP  - 354
EP  - 365
DO  - 10.1007/s10853-014-8594-4
ER  - 

@article{
author = "Sljivic-Ivanovic, M and Smiciklas, I and Milenkovic, A and Dojčinović, Biljana and Babić, Biljana M. and Mitrić, Miodrag",
year = "2015",
abstract = "Animal bones have been studied as a resource of low-crystalline apatite for immobilization of toxic heavy metals. Chemical and thermal treatments can be applied for selective removal of bone organic constituents. In this study, the impact of different treatment factors was determined by experimental design methodology, and comparison of the estimated effects was performed in order to optimize the treatment conditions. Fractional factorial design with five variables at two levels was applied for factors screening. The type of chemical reagent (H2O2 or NaOH), its concentration (0.1 or 2 mol/L), reaction temperature (20 or 60 degrees C), contact time (1 or 3 h) and sample annealing (without or at 400 degrees C) were considered as process variables. Structural properties of bone sorbents, loss of ignition, point of zero charge, surface functional groups, specific surface area, chemical composition, and Cd2+ sorption efficiency, were selected as system responses. Samples significantly differed in respect to the organic phase content and composition, thus mechanisms of Cd2+ sorption were complex. Statistical analysis has revealed that, between all studied factors, temperature treatment was the most important for sorbents increased specific surface area, porosity and cation sorption. Furthermore, NaOH was more effective than H2O2, while the effects produced by variation of other factors were less pronounced. The highest proportion of bio-apatite with desired low crystallinity and high specific surface area was achieved by synergetic effects of chemical treatment with NaOH and thermal treatment at 400 degrees C.",
publisher = "Springer, New York",
journal = "Journal of Materials Science",
title = "Evaluation of the effects of treatment factors on the properties of bio-apatite materials",
volume = "50",
number = "1",
pages = "354-365",
doi = "10.1007/s10853-014-8594-4"
}

Sljivic-Ivanovic, M., Smiciklas, I., Milenkovic, A., Dojčinović, B., Babić, B. M.,& Mitrić, M.. (2015). Evaluation of the effects of treatment factors on the properties of bio-apatite materials. in Journal of Materials Science
Springer, New York., 50(1), 354-365.
https://doi.org/10.1007/s10853-014-8594-4

Sljivic-Ivanovic M, Smiciklas I, Milenkovic A, Dojčinović B, Babić BM, Mitrić M. Evaluation of the effects of treatment factors on the properties of bio-apatite materials. in Journal of Materials Science. 2015;50(1):354-365.
doi:10.1007/s10853-014-8594-4 .

Sljivic-Ivanovic, M, Smiciklas, I, Milenkovic, A, Dojčinović, Biljana, Babić, Biljana M., Mitrić, Miodrag, "Evaluation of the effects of treatment factors on the properties of bio-apatite materials" in Journal of Materials Science, 50, no. 1 (2015):354-365,
https://doi.org/10.1007/s10853-014-8594-4 . .

TY  - JOUR
AU  - Dimović, Slavko
AU  - Smiciklas, Ivana
AU  - Sljivic-Ivanovic, Marija
AU  - Dojčinović, Biljana
PY  - 2013
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/1317
AB  - The influence of bone sorbent addition onto distribution of Sr-90 in artificially contaminated soil was preliminary studied to assess the possibility of biogenic apatite utilization for reduction of Sr-90 mobility and availability. Simultaneously, the disruption of soil micro- (Cd, Zn, Co, Cu, Cr, and Ni,) and macroelements (Al, Fe, Mn, K, Mg, and Ca) upon Sr contamination and sorbent addition was monitored. The model soil was contaminated by inactive Sr, in the form of Sr(NO3)(2) solution. As a soil additive, sorbent obtained by annealing bovine bones at 400 A degrees C (B400) was applied. Both the uncontaminated and Sr-contaminated soils were mixed with 1, 3, 5, and 10 % of sorbent, suspended in distilled water (initial pH 5; solid/solution ratio, 1:2), and equilibrated for 15 days on a rotary shaker. Solid residues were subjected to modified Tessier five-step sequential extraction analysis, and the amounts of chosen metals in each fraction were determined by inductively coupled plasma-optical emission spectroscopy. In the original soil, Sr was mainly found in exchangeable (61 %) and carbonate phase (16 %), whereas after contamination, the content of Sr in exchangeable phase raised to 94 %. With the addition of B400, the decrease in Sr amounts in exchangeable fraction was detected, whereas increase occurred mainly in operationally defined carbonate phase and in the residual. High level of Sr contamination caused the increase in Zn, Ni, Co, Cu, Cd, and Mn and decrease in Ca content in exchangeable phase. Sorbent addition resulted in a migration of these cations to less soluble fractions. This effect was observed even for major soil elements such as Fe, Al, and Mn, regardless of the excessive amounts of Sr in the soil. Mixing the soil with B400 resulted in reduced Sr mobility and bioavailability. B400 acted as a stabilizing agent for heavy metals, as well. Apatite distinguished selectivity towards heavy metals may interfere with the Sr immobilization and disrupt original cation distribution. Further studies should include more realistic (lower) Sr concentrations in the soil, different soil types, pH, and longer incubation times.
PB  - Springer Heidelberg, Heidelberg
T2  - Journal of Soils and Sediments
T1  - Speciation of Sr-90 and other metal cations in artificially contaminated soils: the influence of bone sorbent addition
VL  - 13
IS  - 2
SP  - 383
EP  - 393
DO  - 10.1007/s11368-012-0633-7
ER  - 

@article{
author = "Dimović, Slavko and Smiciklas, Ivana and Sljivic-Ivanovic, Marija and Dojčinović, Biljana",
year = "2013",
abstract = "The influence of bone sorbent addition onto distribution of Sr-90 in artificially contaminated soil was preliminary studied to assess the possibility of biogenic apatite utilization for reduction of Sr-90 mobility and availability. Simultaneously, the disruption of soil micro- (Cd, Zn, Co, Cu, Cr, and Ni,) and macroelements (Al, Fe, Mn, K, Mg, and Ca) upon Sr contamination and sorbent addition was monitored. The model soil was contaminated by inactive Sr, in the form of Sr(NO3)(2) solution. As a soil additive, sorbent obtained by annealing bovine bones at 400 A degrees C (B400) was applied. Both the uncontaminated and Sr-contaminated soils were mixed with 1, 3, 5, and 10 % of sorbent, suspended in distilled water (initial pH 5; solid/solution ratio, 1:2), and equilibrated for 15 days on a rotary shaker. Solid residues were subjected to modified Tessier five-step sequential extraction analysis, and the amounts of chosen metals in each fraction were determined by inductively coupled plasma-optical emission spectroscopy. In the original soil, Sr was mainly found in exchangeable (61 %) and carbonate phase (16 %), whereas after contamination, the content of Sr in exchangeable phase raised to 94 %. With the addition of B400, the decrease in Sr amounts in exchangeable fraction was detected, whereas increase occurred mainly in operationally defined carbonate phase and in the residual. High level of Sr contamination caused the increase in Zn, Ni, Co, Cu, Cd, and Mn and decrease in Ca content in exchangeable phase. Sorbent addition resulted in a migration of these cations to less soluble fractions. This effect was observed even for major soil elements such as Fe, Al, and Mn, regardless of the excessive amounts of Sr in the soil. Mixing the soil with B400 resulted in reduced Sr mobility and bioavailability. B400 acted as a stabilizing agent for heavy metals, as well. Apatite distinguished selectivity towards heavy metals may interfere with the Sr immobilization and disrupt original cation distribution. Further studies should include more realistic (lower) Sr concentrations in the soil, different soil types, pH, and longer incubation times.",
publisher = "Springer Heidelberg, Heidelberg",
journal = "Journal of Soils and Sediments",
title = "Speciation of Sr-90 and other metal cations in artificially contaminated soils: the influence of bone sorbent addition",
volume = "13",
number = "2",
pages = "383-393",
doi = "10.1007/s11368-012-0633-7"
}

Dimović, S., Smiciklas, I., Sljivic-Ivanovic, M.,& Dojčinović, B.. (2013). Speciation of Sr-90 and other metal cations in artificially contaminated soils: the influence of bone sorbent addition. in Journal of Soils and Sediments
Springer Heidelberg, Heidelberg., 13(2), 383-393.
https://doi.org/10.1007/s11368-012-0633-7

Dimović S, Smiciklas I, Sljivic-Ivanovic M, Dojčinović B. Speciation of Sr-90 and other metal cations in artificially contaminated soils: the influence of bone sorbent addition. in Journal of Soils and Sediments. 2013;13(2):383-393.
doi:10.1007/s11368-012-0633-7 .

Dimović, Slavko, Smiciklas, Ivana, Sljivic-Ivanovic, Marija, Dojčinović, Biljana, "Speciation of Sr-90 and other metal cations in artificially contaminated soils: the influence of bone sorbent addition" in Journal of Soils and Sediments, 13, no. 2 (2013):383-393,
https://doi.org/10.1007/s11368-012-0633-7 . .