Abstract. Coal mine Tusnica is located in South-West part of Bosnia and Herzegovina in the municipality Livno. Coal mine Tusnica consists of two surface coal mines. The first one is brown coal surface deposit called Drage and second one is lignite deposit called Table. The brown coal deposit shows increased levels of natural radionuclides. The highest absorbed dose rate is recorded in the center of the surface coal mine Tusnica-Drage (500 nGy h −1 ) as result of the increased content of uranium and radium in coal (average specific activity of U-238 is 623 ± 23 Bq kg −1 and Ra-226 is 1191 ± 5 Bq kg −1 ). Levels of natural radionuclides in the vicinity of the surface deposit Drage in agricultural soil (about 3 km of the centre mine) are slightly increased due to the use of the coal ash and coal dust for fertilization of the land (U-238 is 142 ± 11 Bq kg −1 and Ra-226 is 197 ± 2 Bq kg −1 ). Obtained results in soil-plant-animal products chain does not show significantly increased levels of natural radionuclides due to the fact that mentioned radionuclides, in general, have a low transfer factors in soil-plant-animal products chain.
Abstract. CBPP Kakanj is one of the most important Coal Burning Power Plants in Bosnia and Herzegovina (producing power of 450 MW, waste storage site of 5 000 000 tons). Mapping of the measured gamma-dose rate has been performed with the goal of identifying the hot spots in the area of 3 × 3 km surrounding CBPP Kakanj, with special emphasis on the waste storage site (1 × 1 km). Maximum measured of the gammadose rate surrounding CBPP Kakanj was 140 nGy h −1 and in the area of waste storage site 210 nGy h −1 . Average levels of natural radionuclide in agricultural soil samples in vicinity of CBPP Kakanj are: for 238 U is 41 ± 4 Bq kg −1 , 232 Th is 32 ± 1 Bq kg −1 , 226 Ra is 27 ± 2 Bq kg −1 and 40 K is 486 ± 9 Bq kg −1 . Obtained results in soil-plant-animal products chain does not show significantly increased levels of natural radionuclides due to the fact that mentioned radionuclides, in general, have a low transfer factors in soilplant-animal products chain.
In this paper, the impact of increased levels of uranium and radium in soil on the levels of activity and radiation-hygienic validity of animal products of ruminants was investigated.Region around Livno town is placed on coal layer with the in creased levels of uranium and radium compared with other coals used in Bosnia and Herzegovina. As a result of mixing between coal matrix and soil, in creased value of average absorbed dose rate at 1 m above the ground (144 nGy h-1) was measured. The highest average value of 238U and 226Ra in the samples of animal products of ruminants was measured in the samples of sheep cheese (0.070 Bq kg-1 for 238U and 0.207 Bq kg-1 for 226Ra). The levels of these two radionuclides in the rest of animal product of ruminants were aproximatelly similar and ranged 0.016–0.046 Bq kg-1 for 238U and 0.028–0.080 Bq kg-1 for 226Ra. Levels of 40K were in the range of average values for animal products (31.2–86.4 Bq kg-1). Calculated annual effective dose by ingestion of the animal products of ruminants were approximatelly 0.064 mSv with the highest dose contribution of 40K (96.4%). On the base of obtained results, animal products of ruminants produced in observed region, can be considered as valid for human consumption from radiation-hygienic aspect.
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