Center for Ecotoxicological Research

Podgorica, Montenegro

Center for Ecotoxicological Research

Podgorica, Montenegro
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Antovic I.,State University of Novi Pazar | Stojanovic D.,State University of Novi Pazar | Svrkota N.,Center for Ecotoxicological Research | Zizic R.,Center for Ecotoxicological Research | And 2 more authors.
Journal of Radioanalytical and Nuclear Chemistry | Year: 2014

The adults of centipede Scolopendra cingulata from Serbia have been analyzed for 214Bi, 137Cs, 228Ac, 40K, 212Pb and 214Pb activity. The top 5cm of soil from the same locations (Novi Pazar, Izbice and Pčinja) is also measured—to estimate upper limit of the soil–S. cingulata radionuclide transfer factors (i.e., S. cingulata/soil concentration ratios), as well as the total dose rate—external and internal exposure. Cesium-137 activity was found to be below (or equal to) minimum detectable activity in all 16 specimens. The highest measured 214Bi activity was 0.1Bqg−1, while 228Ac—0.086Bqg−1, 40K—0.12Bqg−1, 212Pb—0.012Bqg−1 and 214Pb—0.029Bqg−1. Bismut-214 transfer factors are found to range from <0.34 to 6, as 228Ac—from <0.4 to 3, whilst the total dose rate is found to be less than 18μGyh−1. The As, Se, Cd, Co, Cr, Cu, Mn, Ni, Pb, but also Zn and Fe concentrations—in three individuals, were also determined. All the elements showed concentrations in the Pčinja S. cingulata significantly lower than in S. cingulata from Novi Pazar and Izbice. © Akadémiai Kiadó, Budapest, Hungary 2014.


Antovic N.M.,University of Montenegro | Svrkota N.,Center for Ecotoxicological Research | Antovic I.,State University of Novi Pazar
Radiation Protection Dosimetry | Year: 2012

Soil samples from Montenegro were analysed by the HPGe detector with 40 % of relative efficiency, for radioactivity due to 226Ra, 232Th and 40K. The average activity concentrations have been found to be 39.9, 43.5 and 437.6 Bq kg. -1, respectively, i.e. in accordance with those in the other South European countries. In order to evaluate the health hazard, radium equivalent activity, absorbed dose rate, annual effective dose rate, external hazard index, annual gonadal dose equivalent and excess lifetime cancer risk (CR) have been calculated. The excess lifetime CR (×10. -3) had a range from 0.12 to 0.79, with an arithmetic mean of 0.27, which is in accordance with the global average. Mean gonadal dose equivalent was higher than the world average, and one location was found with the radium equivalent activity >370 Bq kg -1, i.e. with the external hazard index higher than unity, which means the radiation hazard is not negligible. © The Author 2011. Published by Oxford University Press. All rights reserved.


Antovic N.M.,University of Montenegro | Antovic I.,State University of Novi Pazar | Svrkota N.,Center for Ecotoxicological Research
Radiation Protection Dosimetry | Year: 2010

226Ra activity in the South Adriatic Sea-water, surface sediment, mud with detritus, seagrass (Posidonia oceanica) samples and the mullet (Mugilidae) species Liza aurata, as well as soil and sand from the Montenegrin Coast-was measured using the six-crystal gamma-coincidence spectrometer PRIPYAT-2M. The results are used for calculation of the absorbed (and annual effective) dose rates in air due to the 226Ra gamma radiation. The absorbed dose rates ranged from 5.94 to 97.16 nGy h-1 (soil) and from 0.65 to 7.65 nGy h-1 (sand). In seawater 226Ra activity is found to be from 0.08 to 0.15 Bq l-1, while in whole L. aurata individuals from 0.58 to 1.97 Bq kg-1. Annual intake of 226Ra by human consumers of this fish species has been estimated to provide an effective dose of 0.006 mSv y-1. © The Author 2010. Published by Oxford University Press.


Antovic N.M.,University of Montenegro | Vukotic P.,Montenegrin Academy of science and Arts | Svrkota N.,Center for Ecotoxicological Research | Andrukhovich S.K.,B. I. Stepanov Institute of Physics
Journal of Environmental Radioactivity | Year: 2012

The 239+240Pu activity concentrations in soil from Montenegro (six samples from three localities) have been measured for the first time. The alpha and gamma-spectrometric measurements are used to determine the 239+240Pu/ 137Cs activity ratio, and it was found to be with an average of 0.02 and standard deviation of 0.007. This average activity ratio was applied to estimate 239+240Pu in soil samples from the other 21 localities at which 137Cs activity concentrations were measured. In this research obtained (either experimentally or estimated) 239+240Pu activity concentrations (0.036-8.265 Bq kg -1) are comparable with those measured in some other European countries. On the basis of the results obtained in the present study and a survey of relevant literature, it is possible to conclude that Chernobyl contribution to 137Cs contamination of Montenegro soils is dominant, whilst Pu contamination comes from the global fallout of nuclear weapon tests. © 2012 Elsevier Ltd.


Antovic N.M.,University of Montenegro | Vukotic P.,Montenegrin Academy of science and Arts | Svrkota N.,Center for Ecotoxicological Research | Andrukhovich S.K.,B. I. Stepanov Institute of Physics
Journal of Radioanalytical and Nuclear Chemistry | Year: 2012

Plutonium-238 ( 238Pu) activity concentrations in soil samples from Montenegro (six samples from three localities) have been measured for the first time. The 238Pu/ 137Cs activity ratio was determined on the basis of alpha and gamma-spectrometric measurements, and found to be with an average of 0.0006 and standard deviation of 0.0003. By using the activity ratios determined in the present study, 238Pu activity concentrations were estimated for three localities in the central: one in the northern, and two in the eastern part of Montenegro. © 2012 Akadémiai Kiadó.


Antovic N.M.,University of Montenegro | Antovic I.,State University of Novi Pazar | Svrkota N.,Center for Ecotoxicological Research
Journal of Radioanalytical and Nuclear Chemistry | Year: 2010

232Th activities in the South Adriatic Sea-water, surface sediment, mud with detritus, seagrass (Posidonia oceanica) samples, and the mullet (Mugilidae) species Mugil cephalus, as well as soil and sand from the Montenegrin Coast, were measured using the six-crystal spectrometer PRIPYAT-2M, which has relatively high detection efficiency and a good sensitivity, and allows a short acquisition time, and measuring samples of any shape, without preliminary preparation and calibration measurements for different sample geometries. An average 232Th activity concentration in surface soil layer is found to be 40.33 Bq kg-1, while in sand-4.7 Bq kg -1. The absorbed dose rate in air due to 232Th gamma radiation from surface soil layer ranged from 11.76 to 63.39 nGy h-1, with a mean of 24.06 nGy h-1. Corresponding average annual effective dose rate has been found to be 0.03 mSv y-1. The absorbed dose rates due to the thorium gamma radiation in air at 1 m above sand surface on the Montenegrin beaches have been found to be from 0.41 to 9.08 nGy h-1, while annual effective dose rates ranged from 0.0005 to 0.011 mSv y -1. 232Th activity concentration in seawater ranged from 0.06 to 0.22 Bq L-1, as in the mullet (Mugil cephalus) whole individuals from 0.63 to 1.67 Bq kg-1. Annual intake of 232Th by human consumers of this fish species has been estimated to provide an effective dose of about 0.003 mSv y-1. © 2010 Akadémiai Kiadó.


Antovic N.M.,University of Montenegro | Svrkota N.,Center for Ecotoxicological Research | Antovic I.,State University of Novi Pazar
Journal of Radioanalytical and Nuclear Chemistry | Year: 2010

A coincidence method for measuring radium and thorium activity has been developed using the PRIPYAT-2M gamma-ray coincidence spectrometer, with six NaI(Tl) detectors and registration geometry close to 4π. It was tested by measuring soil samples from the Northern region of Montenegro, as well as vegetation samples from the same region. The results showed a good agreement with ones obtained by the HPGe spectrometer. © 2009 Akadémiai Kiadó, Budapest, Hungary.


Antovic N.M.,University of Montenegro | Svrkota N.,Center for Ecotoxicological Research | Antovic I.,State University of Novi Pazar | Svrkota R.,Geological Survey of Montenegro | Jancic D.,Center for Ecotoxicological Research
Isotopes in Environmental and Health Studies | Year: 2013

Activity concentrations of the naturally occurring radionuclides 226Ra, 232Th, 40K and anthropogenic 137Cs in sand samples collected from 20 renowned beaches on the Coast of Montenegro have been determined using an HPGe (high purity Ge spectrometer). The average activity concentrations were found to be 7.4, 5.2, 97.3 and 0.5 Bq kg-1, respectively. For all sand samples, the radium equivalent activity has been evaluated and found to be lower than the limit of 370 Bq kg-1. External and internal hazard indices were less than unity. The gonadal dose equivalent was estimated to be on average 75 μSv y-1, which is about four times lower than the global average for soil (0.3 mSv y-1). Calculated values of absorbed dose rates showed the range from 3.1 to 28 nGy h-1, which is below the world median of average values (57 nGy h-1). The effective dose rate in the range from 3.8 to 34.4 μSv y-1 was significantly below the recommended limit value for the public (1 mSv y-1). The highest dose rate was found for the Velika Plaza locality, which also showed heavy metal contents (As, B, Cd, Hg, Cr, Cu, Mn, Ni, Pb, Zn and Ba) significantly higher than in the sand from Jaz, a locality with one of the lowest dose rates. © 2013 Copyright Taylor and Francis Group, LLC.


Antovic N.M.,University of Montenegro | Svrkota N.,Center for Ecotoxicological Research | Antovic I.,State University of Novi Pazar | Svrkota R.,Geological Survey of Montenegro | And 2 more authors.
Journal of Radioanalytical and Nuclear Chemistry | Year: 2014

Among all diagnosed and treated lung cancers in Montenegro in 2009, 15.5 % were from Nikšić. The incidence rate was estimated to be around 42.5 per hundred thousand. In order to understand the role of radioactivity in initiating lung cancer the data on indoor radon concentrations obtained from earlier work coupled with that obtained in the present work for 226Ra, 232Th/228Ac, 40K and 137Cs from uncultivated soils, were used to estimate hazard indices. The risk factor for lung cancer due to radon was found to be significantly higher than excess lifetime cancer risk due to terrestrial radiation—outdoor. The stem of blackberry (Rubus fruticosus) was also analyzed for its radioactivity content, and showed soil–plant transfer factors for radium and caesium—from typical ranges for soil–plant transfer factors given in the UNSCEAR 2008 report. © Akadémiai Kiadó, Budapest, Hungary 2014.


Milatovic A.A.,Center for Ecotoxicological Research | Spasic Jokic V.M.,University of Novi Sad | Jovanovic S.I.,University of Montenegro
Nuclear Technology and Radiation Protection | Year: 2014

Investigations presented in this paper represent the first estimation of patient doses in chest radiography in Montenegro. In the initial stage of our study, we measured the entrance surface air kerma and kerma area product for chest radiography in five major health institutions in the country. A total of 214 patients were observed. We reported the mean value, minimum and third quartile values, as well as maximum values of surface air kerma and kerma area product of patient doses. In the second stage, the possibilities for dose reduction were investigated. Mean kerma area product values were 0.8 ± 0.5 Gycm2 for the posterior-anterior projection and 1.6 ± 0.9 Gycm2 for the lateral projection. The max/min ratio for the entrance surface air kerma was found to be 53 for the posterior-anterior projection and 88 for the lateral projection. Comparing the results obtained in Montenegro with results from other countries, we concluded that patient doses in our medical centres are significantly higher. Changes in exposure parameters and increased filtration contributed to a dose reduction of up to 36% for posterior-anterior chest examinations. The variability of the estimated dose values points to a significant space for dose reduction throughout the process of radiological practice optimisation. © 2014 Vinca Inst Nuclear Sci. All rights reserved.

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