Radiological hazard indices due to activity concentrations of natural radionuclides in farm soils from two high background radiation areas in Nigeria

2009 ◽  
Vol 6 (2) ◽  
pp. 79 ◽  
Author(s):  
N.N. Jibiri ◽  
S.K. Alausa ◽  
I.P. Farai
Keyword(s):  
Background Radiation ◽  
Natural Radionuclides ◽  
Radiological Hazard ◽  
Hazard Indices ◽  
High Background ◽  
Activity Concentrations ◽  
Radiological Hazard Indices ◽  
Farm Soils

scholarly journals Natural Radioactivity in Some Building Materials Originating from a High Background Radiation Area

2014 ◽  
Vol 2 (6) ◽  
pp. 70-78
Author(s):  
Kinsara A.A ◽  
Shabana E.I ◽  
Qutub M.M.T
Keyword(s):  
Building Materials ◽  
Background Radiation ◽  
Natural Background ◽  
Hazard Indices ◽  
High Background ◽  
Activity Concentrations ◽  
Metavolcanic Rocks ◽  
High Background Radiation Area ◽  
Radiation Area ◽  
Radioactivity Levels

Twenty four samples of building materials, collected from utilized quarries dispersed randomly in a high natural background radiation area, were analyzed for 226Ra, 232Th and 40K by γ-spectrometry. This area lies in Hail province, Saudi Arabia. The collected samples were fragmented granites, granite gravels with clays, sands and crushed black rocks (mafic metavolcanic rocks). The results showed that the highest activity concentrations were found in the fragmented granite materials and ranged from 144-207, 671-1058 and 964-1440 Bq/kg with average values of 194, 912 and 1320 Bq/kg for 226Ra, 232Th and 40K, respectively. The lowest activity concentrations were found in the black rock materials which ranged from 19-39, 47-125 and 212-306 Bq/kg with average values of 24, 82 and 255 Bq/kg for 226Ra, 232Th and 40K, respectively. The radioactivity levels in the other materials lie somewhere in between. Granites and clays exceeded the proposed hazard indices for the usage as building materials and should be restricted, whereas the sands and the crushed black rocks complied with these indices and can be used without restrictions.

EVALUATION OF RADIATION DOSES AND HAZARD INDICES IN CRUSHED ROCKS FROM SOME QUARRIES IN IBADAN SOUTHWESTERN NIGERIA

2019 ◽  
Vol 187 (3) ◽  
pp. 383-389 ◽  
Author(s):  
S K Alausa ◽  
F O Eluyera ◽  
J O Coker
Keyword(s):  
Health Effect ◽  
Radiation Doses ◽  
Radiological Hazard ◽  
Hazard Indices ◽  
Southwestern Nigeria ◽  
Activity Concentrations ◽  
The Mean ◽  
Radiological Health ◽  
Radiological Hazard Indices ◽  
Radioactivity Levels

Abstract The radiological assessment of rock samples from four quarry sites in Ibadan have been carried out. The mean activity concentrations of 40K, 226Ra and 232Th were 377.0 ± 37.9, 17.7 ± 3.6 and 4.98 ± 2.1 Bq kg−1, respectively, for Ratcon Quarry (RQ); 408.0 ± 28.7, 16.6 ± 1.6 and 10.6 ± 2.3 Bq kg−1, respectively, for Dekit Quarry; 388.0 ± 26.6, 15.7 ± 1.9 and 9.85 ± 3.9 Bq kg−1, respectively, for Hajaig Quarry; and 388.084 ± 55.9, 16.2 ± 3.9 and 12.1 ± 3.8 Bq kg−1, respectively, for NSCE Quarry (NQ). The highest mean outdoor effective dose of 0.038 ± 0.005 mSv y−1 and the minimum of 0.033 ± 0.004 mSv y−1 were obtained at NQ and RQ, respectively. The radiological hazard indices recorded in each site were <1.0. The results show lower radioactivity levels than the world average values; therefore, no serious radiological health effect is expected when the crushed rocks from the quarries are used for buildings construction.

scholarly journals Suitability of rocks and sediments from Brzeszcze and Silesia coal mines as building materials in terms of radiological hazard

Nukleonika ◽  
2019 ◽  
Vol 64 (2) ◽  
pp. 65-70
Author(s):  
Monika Śleziak ◽  
Marek Duliński
Keyword(s):  
Bottom Sediments ◽  
Building Materials ◽  
Natural Radionuclides ◽  
Germanium Detector ◽  
Absorbed Dose ◽  
Radiological Hazard ◽  
Hazard Indices ◽  
Absorbed Dose Rate ◽  
Radium Equivalent ◽  
Radiological Hazard Indices

Abstract The isotope activity concentration of rocks and bottom sediments was evaluated based on the samples collected from sedimentation ponds and gangue repositories. Radium 226Ra, thorium 228Th and potassium 40K activities were measured by gamma spectrometry using high-purity germanium detector – HPGe 4020. The radiation effect resulting from the presence of natural radionuclides was estimated by radiological hazard indices such as f1 and f2 coefficients, radium equivalent, internal and external hazard indices and absorbed dose rate. Performed measurements and calculations have shown that the bottom sediments are most contaminated. They may pose a serious radiological hazard for present and future generations.

scholarly journals Assessment of Beach sand using Gamma Ray Spectrometer in Thiruvanathapuram District, Kerala of South India

2016 ◽  
Vol 5 (3) ◽  
pp. 56 ◽  
Author(s):  
Ajithra Abinesh ◽  
Shanthi G.
Keyword(s):  
Tamil Nadu ◽  
Gamma Ray ◽  
Background Radiation ◽  
Beach Sand ◽  
Hazard Indices ◽  
Air Exposure ◽  
High Background ◽  
Activity Concentrations ◽  
The World ◽  
The Waves

<div><p><em>It is well recognized fact that some areas of the world have anomalously high levels of natural background radiation referred to as high background radiation areas (HBRAs).  Typical examples include Yangjiang in China, Rasmar in Iran and In India, part of coastal areas of Kerala and Tamil Nadu fall in this category.  It has been established earlier that the cause for this high background is the presence of monazite (thorium). This study focuses on the estimation of the environmental radioactivity levels in the beach sands of </em><em>Thiruvanathapuram district, Kerala. </em><em> </em></p></div><p><em>Using high resolution gamma ray spectroscopy activity concentrations of <sup>40</sup>K, <sup>238</sup>U &amp; <sup>232</sup>Th were estimated. Activity concentrations ranged from 17-154 Bq/kg for <sup>40</sup>K, from 4 to 100 Bq/kg for <sup>238</sup>U and from 6 to 296 Bq/kg for <sup>232</sup>Th.The mean activity concentration values obtained for the radionuclide are below than the world average values reported by the UNSCEAR. Subsequently assessed radiological effects show that the mean radium equivalent activity is 65 Bq/kg. The range of the calculated air exposure rate was between 14.2 to 228.1 nGy/h in both 0 m from the Waves and 10 m from the Waves. The values of external and internal radiation hazard indices are found to be less than unity. Measured natural radioactivity, hazard indices and effective dose received by the population were found to within the recommended limits. This work provides a good baseline data of natural radioactive elements for the sand of the area and  its radiological significance. </em></p>

scholarly journals Measurement of Radioactivity And Assessment of Radiological Hazard of Tea Samples Collected From Local Market In Bangladesh

2018 ◽  
Vol 42 (2) ◽  
pp. 171-176 ◽  
Author(s):  
Mst Najnin Aktar ◽  
Suranjan Kumar Das ◽  
Selina Yeasmin ◽  
MM Mahfuz Siraz ◽  
AFM Mizanur Rahman
Keyword(s):  
Natural Radionuclides ◽  
Radiation Hazard ◽  
Local Market ◽  
Radiological Hazard ◽  
Hazard Indices ◽  
Radium Equivalent Activity ◽  
Dose Rates ◽  
Average Value ◽  
Activity Concentrations ◽  
Radium Equivalent

The activity concentrations of natural radionuclides and radiological hazard indices in eleven tea samples collected from local market in Bangladesh have been analyzed by using High Purity Germanium (HPGe) Detector. The average activity concentrations of 226Ra, 232Th and 40K in tea samples have been found to be 21.21±14.04, 32.43±7.48 and 93.47 ± 43.94 Bqkg-1 respectively. The calculated absorbed dose rates due to these radioactive nuclides in tea samples have been found to vary from 26.24 nGyh-1 to 37.95 nGyh-1 and average value was 33.28 nGyh-1. The estimated outdoor annual effective dose rates varied from 38.64  µSvy-1 to 55.89 µSvy-1 with the mean value of 49.02 µSvy-1 which is less than the world average value of 1000 µSvy-1. The values of radium equivalent activity in all samples are less than the permissible maximum value of the radium equivalent activity which is 370 Bqkg-1 according to UNSCEAR 2000 report. The values of external and internal hazard indices for different samples varied from 0.16 to 0.23 with the average value of 0.20 and from 0.21 to 0.29 with an average of 0.26. The value of this index must be less than unity in order to keep the radiation hazard insignificant. It was also found that there is no artificial radionuclide (for example 137Cs) in any of the samples. The data generated in this study will provide baseline radiometric values for natural and artificial radioactivity in tea samples in Bangladesh. Journal of Bangladesh Academy of Sciences, Vol. 42, No. 2, 171-176, 2018

scholarly journals Natural radioactivity and radiological hazard of red-clay brick produced in Shangluo, China

2020 ◽  
Vol 35 (4) ◽  
pp. 347-353
Author(s):  
Sukai Zhuang ◽  
Xinwei Lu
Keyword(s):  
Building Materials ◽  
Natural Radionuclides ◽  
Hazard Index ◽  
Radiation Hazard ◽  
Radiological Hazard ◽  
Clay Brick ◽  
Red Clay ◽  
Clay Bricks ◽  
Activity Concentrations ◽  
Red Clay Brick

The radiological hazard of building materials originating from clay, rock and other mineral wastes has attracted more attention because they contain natural radionuclides (226Ra, 232Th, and 40K). The activity concentration of radionuclides in red-clay brick samples obtained from three different brickyards in Shangluo, China waHs measured. Various indexes, including radium equivalent activities, Raeq, external hazard index, Hex, internal hazard index, Hin, indoor air absorbed dose rate, D, and annual effective dose, AED, of the aforementioned radionuclides in the bricks were used to assess the radiation hazard for people. The average activity concentrations of 226Ra, 232Th, and 40K were respectively 34.5 ? 1.9, 62.5 ? 2.1, and 713.7 ? 19.8 Bqkg?1 for the studied red-clay bricks. The Raeq values of the red-clay brick samples varied from 167.0 to 184.7 Bqkg?1, which are lower than the limit of 370 Bqkg?1. Moreover, the activity concentrations of natural radionuclides in unfired brick, clay and coal were also determined and the results were compared with that in the red-clay brick samples. This study shows that the red-clay bricks produced in Shangluo, China can be used safely in construction industries.

Calculation of Radiation Nuclei Concentrations in Fertilized and Unfertilized Plants Samples Using Gamma Spectroscopy

2021 ◽  
Vol 19 (2) ◽  
pp. 13-18
Author(s):  
Adawiya M. ALwan ◽  
Auday T. Al-Bayati ◽  
Khalid H. Mahdi ◽  
Hazim L. Mansour
Keyword(s):  
Gamma Spectroscopy ◽  
Petri Dish ◽  
Radiological Hazard ◽  
Hazard Indices ◽  
Plant Samples ◽  
Radiological Hazard Indices

The aim of this work was to estimate the concentrations of natural and artificial nuclides in some fertilized and unfertilized plant samples. These samples were collected and prepared in a petri dish for the measurements using gamma spectroscopy. The average values of 238U, 232Th, 40K, and 137Cs for the unfertilized plant samples were (11.964 ± 3.226, 8.273 ± 2.639, 402.436 ± 18.099, and 2.761 ± 1.613) respectively, and for the fertilized plant samples were (30.434 ± 5.282, 22.584 ± 4.620, 711.332 ± 25.806, and 6.986 ± 2.542) respectively. The average values of radiological hazard indices, Raeq, D, D for 137Cs, (AEDE)in, (AEDE)out, Iγ, Hin, and Hout for the unfertilized plant samples were (54.782 ± 7.216, 27.306, 0.469, 0.134, 0.033, 0.431, 0.180, and 0.148) respectively, and for the fertilized plant samples were (117.502 ± 10.747, 57.364, 1.188, 0.281, 0.070, 0.903, 0.400, and 0.317) respectively. The present results have indicated that the fertilized plant samples have more concentrations than the unfertilized plant samples.

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