Slavko Dimovic

Slavko Dimovic
University of Belgrade · Vinca Institute of Nuclear Science

phD

About

57
Publications
3,409
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983
Citations
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September 2002 - January 2016
Vinča Institute of Nuclear Sciences
Position
  • Research Associate

Publications

Publications (57)
Conference Paper
Full-text available
U ovom radu izvršen je uporedni prikaz političkih, ekonomskih, društvenih i ekoloških aspekata u analizi bezbednosnih rizika koji potiču od različitih oblika ugrožavanja poput terorizma, krađa, pronevera, sabotaža i prevara u upravljanju nuklearnim otpadom. Na taj način, primenom sektorskog pristupa bezbednosti, formulisanog u okviru Kopenhaške ško...
Conference Paper
Full-text available
The modern security environment is undergoing a profound transformation. This transformation has been shaped by the emergence of new patterns of conflict and cooperation among state and non-state actors as well as the spread of globalization and new technologies. Also, the development of a new breed occurred, characterized by a combination of warfa...
Article
Copper slag flotation tailings (CSFT), as the end‐waste from copper mining, were evaluated for radionuclide and heavy metal immobilization. Characterization of CSFT based on grain size and mineral composition, surface functional groups, pH and electrical conductivity in aqueous media, thermogravimetric analysis, determination of characteristic temp...
Article
Full-text available
The probability of Cs+ and Co2+ ions retention by immobilization processes in the cement matrix was determinate as the subject of analyses: matrix design, water/cement ratio, and structure porosity. Comparison of experimental results was accomplished by Hespe standard leaching method. Diffusion and semi-empirical models were used for the assessment...
Article
Full-text available
The aim of the study was to assess Cs+ ions transport phenomena from solidified spent ion exchange resin by mathematical modeling. The experimental results comparison was obtained by Hespe's Standard Leaching Method. For the leaching prediction rate as a function of time, diffusion and semi-empirical models were used. Due to the presence of spent i...
Article
Full-text available
The utilization of construction and demolition waste materials for the radionuclide immobilization by sorption processes was investigated. Given that the liquid radioactive waste usually has a complex composition and that effects of competition may significantly influence the efficiency of the treatment, the Simplex Centroid experimental design was...
Article
Full-text available
The possibility of retaining Cs+ and Co2+ bound by immobilization processes in the cement matrix is defined as the subject of its investigation: the cement matrix formulation, the water/cement ratio, the amount of waste, and the porosity of such a structure. Implementing the standard leaching method by Hespe the possibility of comparing different a...
Article
Full-text available
The present study deals with the abundance of the most common accessory elements of radioactivity carriers on the Stara Planina mountain at four defined locations. All investigated locations have increased radioactivity, greater than 200 cps, up to 1250 cps. In all examined samples the following elements were detected and their concentrations were...
Article
Full-text available
The use of soil additives for toxic metals chemical stabilization aims to decrease in situ the pollutants’ mobility and availability. In this study, the effectiveness of rinsed red mud (RBRM) and annealed animal bones (B400) was compared in terms of Cu, Pb and Ni stabilization in two contaminated soils with contrasting properties Dystric Cambisol (...
Article
Full-text available
Artificially contaminated soil, with mixture of Co(II) and Sr(II) ions in different proportions, was tested. The main aim was to investigate the possibility of ethylenediaminetetraacetic acid (EDTA) utilization in the chemical extraction process as a method for soil remediation in the case of mixed contamination. The efficiency of this process when...
Article
Full-text available
In this study, the applicability of waste concrete as a sorbent material for the liquid radioactive waste management was considered. The sample was properly characterized in terms of mineralogical and surface composition, particles morphology, radioactivity, and of the behavior in aqueous solutions at different solid/liquid ratios and pH values. Si...
Article
Following the guiding “3R” principle of sustainable development (Reduce, Reuse and Recycle), the potential applicability concerning various components of construction and demolition waste (C&DW) was investigated for radionuclide sorption (Sr, Co, Ni). Collected samples of waste concrete, facade, bricks and asphalt were characterized in respect to m...
Article
Full-text available
The radionuclides can be efficiently removed from aqueous solutions using ion-exchangers and sorbents of high capacity and stability. In addition to organic resins, natural and synthetic inorganic materials can also be utilized. Alumosilicates, oxides and phosphates are the minerals that control radionuclide mobility in the environment, which impli...
Article
Full-text available
The sorption properties of waste facade, brick, and asphalt sample towards Sr(II), Co(II), and Ni(II) ions from single and multicomponent solutions were investigated. The highest sorption capacity was found for Ni(II) ions, while the most effective sorbent was facade. Simplex Centroid Mixture Design was used in order to investigate the sorption pro...
Article
The kinetic and equilibrium sorption data of Co(II) ions were obtained from batch sorption experiments, using soils samples with a wide range of texture, carbonate and organic content. Sequential extraction protocol was applied to evaluate Co(II) interactions with soil fractions. The parameters, obtained from kinetic and isotherm data modeling, as...
Article
The possible utilization of waste ceramic (CT) and roof tiles (RT), as sorbents for liquid radioactive waste (LRW) treatment, was investigated. Following the European directives on waste and politics of saving natural raw materials, it is reasonable and desirable to explore potential applicability of such construction wastes. These materials are lo...
Article
Full-text available
The aim of the research was to estimate if dust/fly ash emitted into the atmosphere from chimneys and ash disposal sites of thermal power plants “Nikola Tesla A and B” in Obrenovac can raise the concentration of PM10 in New Belgrade. TNTA and TNTB are closed to Belgrade (population of 2.5 million) and it is important to estimate the amount of the p...
Article
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 (...
Conference Paper
Full-text available
This paper presents the preliminary results of the tests of mathematical models of atmospheric dispersion, which are operationally used in PC Nuclear Facilities of Serbia. Mathematical models codenamed NFS_Vinca (routine and accidental version), have been reported in the list of mathematical models of the working group WG2, program MODARIA (IAEA),...
Article
90Sr is a long-lived radionuclide, which enters the environment by accidental release of liquid radioactive waste. In this study, Sr2 + sorption was investigated using eight different soil types. Experiments were conducted by varying different parameters such as: contact time, solution pH and initial Sr2 + concentration, while distribution of Sr2 +...
Article
Abstract Sorption–desorption properties of cobalt(II) and strontium(II) ions were studied using a soil sample from the vicinity of the Serbian radioactive waste processing and interim storage facilities. The mobility of the cations in the soil was evaluated and compared with the intention to facilitate the selection of optimal remediation strategy...
Article
Full-text available
Animal bones are natural and rich source of calcium hydroxyapatite (HAP), which was found to be a good sorbent material for heavy metals and radionuclides. Various treatments can reduce the content of bone organic phase and improve sorption properties. In this study, sorption capacities of raw bovine bones (B) and samples obtained by chemical treat...
Article
Full-text available
This paper presents an algorithm for the calculation of internal and external doses as an integral part of the mathematical model of atmospheric dispersion. The air pollution dispersion model is used on average annual activity concentration in the air, deposition on soil and field of total annual dose to a hypothetical resident contaminated by air...
Conference Paper
Full-text available
This paper presents an algorithm for the calculation of internal and external doses, which is an integral part of the mathematical model of atmospheric dispersion. Results of modeling were compared with values from an IAEA publication for a given scenario of radionuclide emission to the atmospheric boundary layer. Due to small differences in the re...
Article
Full-text available
Research activities of Vinca Institite have been based on two heavy water research reactors: a 10 MW one, RA, and zero power, RB. Reactor RA was operational from 1962 to 1982. In 2010, spent fuel has been sent to the country of origin, and the reactor now is in decommissioning. During the operational phase of the reactor there were no recorded acci...
Conference Paper
Full-text available
In the paper is presented an assessment of impact on the environment, of the assumed emissions of radio nuclides in the boundary layer of the atmosphere, from the ventilation of nuclear reactor in Vinca. This estimation was done taking into account characteristics of the reactor ventilation system, then based on the assumed emission of radioactivit...
Article
Purpose The influence of bone sorbent addition onto distribution of 90Sr in artificially contaminated soil was preliminary studied to assess the possibility of biogenic apatite utilization for reduction of 90Sr mobility and availability. Simultaneously, the disruption of soil micro- (Cd, Zn, Co, Cu, Cr, and Ni,) and macroelements (Al, Fe, Mn, K, Mg...
Article
An optimization of mortar (as matrix), improved with bentonite clay, used for immobilization of radionuclides 60Co, 137Cs, 85Sr and 54Mn, is presented. A relatively simple mathematical model is given, which permits minimization of leach rate and permeability and maximization of compressive strength. An optimal solution, based on experimental data,...
Article
Bone char powder, composed mainly of poorly crystalline hydroxyapatite (Ca(10)(PO(4))(6)(OH)(2)), carbon and CaCO(3), has potential applicability in the removal of Co(2+) ions from contaminated effluents. In the present study, the influence of process parameters: particle size, agitation speed, initial pH and initial sorbate concentration, onto kin...
Conference Paper
Traditional methods of processing evaporator concentrates from Nuclear Power Plants are evaporation and cementation. These methods allow transforming a liquid radioactive waste into a more inert form, suitable for a final disposal. To assess the safety for disposal of radioactive mortar-waste composition, the leaching of 137 Cs from immobilized rad...
Article
Two fundamental concerns must be addressed when attempting to isolate low-level waste in a disposal facility on land. The first concern is isolating the waste from water, or hydrologic isolation. The second is preventing movement of the radionuclides out of the disposal facility, or radionuclide migration. Particularly, we have investigated here th...
Article
Full-text available
Two fundamental concerns must be addressed when attempting to isolate low-level waste in a disposal facility on land. The first concern is isolating the waste from water, or hydrologic isolation. The second is preventing movement of the radionuclides out of the disposal facility, or radionuclide migration. Particularly, we have investigated the lat...
Article
The interaction between Sr2+ ions and variously treated animal bones was studied from the aspect of 90Sr isotope immobilization from the contaminated effluents. As a source of biogenic, poorly-crystalline apatite, bone based materials, in general, were found to exhibit good retention properties towards Sr2+ cation. Furthermore, sorption capacities...
Article
Full-text available
To assess the safety of disposal of radioactive waste material in cement, curing conditions and time of leaching radionuclides 137Cs have been studied. Leaching tests in cement-ion exchange resins-bentonite matrix, were carried out in accordance with a method recommended by IAEA. Curing conditions and curing time prior to commencing the leaching te...
Article
The non-isothermal combustion of animal bones was investigated by simultaneous thermogravimetric and differential thermal analysis (TG–DTA), in the temperature range ΔT = 20–650 °C. The full kinetic triplet (A, Ea and f(α)) for the investigated process was established, using different calculation procedures: isoconversional (model-free) and the Kis...
Article
Full-text available
Transport phenomena involved in the leaching of a radioactive material from a cement composite matrix are investigated using an empirical method employing a polynomial equation. To assess the safety for disposal of radioactive waste-cement composition, the leaching of 137 Cs and 60 Co, from a waste composite into a surrounding fluid has been studie...
Article
The effect of particle size, bone char mass, initial pH, and metal concentration on the kinetics of Sr2+ sorption by bone char was studied and discussed. Considering the sorbed amounts of Sr2+, solution pH changes, changes of Ca2+ concentrations and Ca/Sr molar ratios, with time, it was concluded that surface complexation reactions are dominant in...
Article
To assess the safety for disposal of radioactive mortar-waste composition, the leaching of 137Cs, 60Co and 85Sr from immobilized radioactive evaporator concentrate, into a surrounding fluid has been studied. This paper also presents results from studies made to determine the influence of natural adsorbents (bentonite and zeolite) in immobilization...
Article
Available in abstract form only. Full text of publication follows: Traditional methods of processing evaporator concentrates from NPP are evaporation and cementation. These methods allow to transform a liquid radioactive waste into the rather inert form, suitable for a final disposal. To assess the safety for disposal of radioactive mortar-waste co...
Article
The objective of the present study was the evaluation of differently treated bovine bones for Co(2+) removal from aqueous media. Powdered bones (B), as well as samples prepared by H(2)O(2) oxidation (BH(2)O(2)) and annealing at 400-1000 degrees C (B400-B1000), were tested as sorbent materials. A combination of XRD, FTIR spectroscopies, DTA/TGA anal...
Article
Considering the excellent sorption properties of synthetic calcium hydroxyapatite (HAP) towards many divalent cations, the potential application of bone char, the natural source of HAP, for sequestering Sr(2+)ions from aqueous solutions has been studied in batch conditions. Contact time, initial solution pH and initial Sr(2+) concentrations were va...
Conference Paper
To assess the safety of disposal of radioactive waste material in cement, curing conditions and time of leaching radionuclides {sup 137}Cs have been studied. Leaching tests in cement-ion exchange resins-bentonite matrix, were carried out in accordance with a method recommended by IAEA. Curing conditions and curing time prior to commencing the leach...
Article
The adsorption properties of local clinoptilolite (Serbia) towards Cs+, Co2+, and Sr2+ were investigated by batch equilibration technique. The influence of equilibration time, initial metal cation concentration, solution pH and presence of EDTA on these properties was studied and discussed. Kinetic data were found to be well fitted with pseudo-seco...
Article
In this experiment, after 180 days of measuring, the compressive strength development for various curing histories was investigated with particular regard to the influences of curing time points with the incremental leaching rates of 137Cs and 60Co from evaporator concentrates. For this purpose, three different compositions and different points of...
Article
To assess the safety for disposal of radioactive mortar-waste composition, the leaching of 137Cs, 60Co and 85Sr from immobilized radioactive evaporator concentrate, into a surrounding fluid has been studied. This paper also presents results from studies made to determine the influence of natural sorbents (bentonite and zeolite) on immobilization of...
Article
A study on the removal of cobalt ions from aqueous solutions by synthetic hydroxyapatite was conducted in batch conditions. The influence of different sorption parameters, such as: initial metal concentration, equilibration time, solution pH and presence of EDTA on the amount of Co(2+) sorbed was studied and discussed. The sorption process followed...
Article
Full-text available
Summary Leach characteristics of 137Cs and 60Co radionuclides from spent mix bead ion exchange resins and both ordinary Portland cement and cement mixed with two kind of natural sorbents (bentonite and clinoptilolite) have been studied using the International Atomic Energy's (IAEA) standard leach method. The waste immobilization performance of low-...
Article
Full-text available
To assess the safety of disposal of radioactive waste material in cement, curing conditions and time of leaching radionuclides 137 Cs have been studied. Leaching tests in cement-ion exchange resins-bentonite matrix, were carried out in accordance with a method recommended by IAEA. Curing conditions and curing time prior to commencing the leaching t...
Article
To assess the safety for disposal of radioactive waste-cement-bentonite composition, the leaching of 137Cs and 60Co, from a waste composite into a surrounding fluid has been studied [Burns, R.H. Atomic Energy Rev. 9 (1971) 547; Hashimoto, I., Deshpande, K.B. & Thomas, S.H. I & EC Fundamentals 3 (1964) 213]. Leaching tests were carried out in accord...
Article
Traditional methods of processing evaporator concentrates from NPP are evaporation and cementation. These methods allow the transformation of a liquid radioactive waste into an inert form, suitable for a final disposal. To assess the safety for disposal of radioactive mortar-waste composition, the leaching of 137Cs from immobilized radioactive evap...
Article
There are two fundamental issues that must be addressed in an attempt to isolate low-level waste in a disposal facility on land. The first is the isolation of waste from water, or hydrologic isolation. The second is prevention of radionuclide leakage from the disposal facility, or radionuclide migration. We have investigated here the latter modifie...
Article
Leach characteristics of 54Mn and 85Sr radionuclides from ordinary Portland cement have been studied using International Atomic Energy’s (IAEA) standard leach method. The retardation factors, K F, and coefficients of distribution, k d, have been determined using a simplified mathematical model for analyzing the migration of radionuclides. The lowes...
Article
Full-text available
Results of a series of experimental tests performed to determine the influence of matrix characteristics on the leaching mechanism of copper aluminum oxychloride immobilized into cement matrices are presented. The objective of this work was to investigate the leaching mechanism of copper as a constituent of copper aluminum oxychloride (‘CAOX’). Tra...

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Project (1)
Project
The presence of heavy metals, toxic gases, organic pollutants, radionuclides and radiation fields in the environment even at very low levels posses a big threat and demand actions towards the development of novel or improved methods for their detection, quantification and prediction of distribution, as well as the development of techniques for their removal and minimization of their adverse effects on human health. Monitoring and minimizing the environmental pollution is focused on using different instrumental analytical techniques, statistical and mathematical models, advanced materials, and concentration and separation procedures. The project includes new approaches to the optimization of monitoring methods, analysis of concentration profiles, elucidation of the mechanisms of separation processes, and development of new techniques for reliable estimation of radiation doses and health risks. Procedures are being developed for synthesis and characterization of novel and modified polymeric and inorganic sorbents, monodispersed microparticles and multiphase systems that are employed for monitoring and immobilization of environmental pollutants. The investigations lead to new research publications, case studies and patent applications in the area of environmental protection from harmful effects of chemicals and radiation. The project provides opportunities for training and professional development of scientists in the environmental sector and for international collaboration.