Potential effect of natural radionuclides in riverbed sediments: a statistical approach based on granulometric and magnetic mineral differences
South India is one of the regions in the world that has the highest background radiation levels. In this region, river sediments are used in large quantities as building material. Therefore, the knowledge of the radionuclides distribution in such sediments is important for assessing their potential...
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2017
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_18666280_v76_n7_p_Krishnamoorthy http://hdl.handle.net/20.500.12110/paper_18666280_v76_n7_p_Krishnamoorthy |
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paper:paper_18666280_v76_n7_p_Krishnamoorthy2023-06-08T16:29:46Z Potential effect of natural radionuclides in riverbed sediments: a statistical approach based on granulometric and magnetic mineral differences Bharathapuzha river sediments Magnetic measurements Natural radioactivity Statistical analysis Hazards Magnetic susceptibility Magnetic variables measurement Magnetism Multivariant analysis Particle size Radiation Radiation hazards Radioactivity Radioisotopes Radiometry Rivers Statistical methods Activity concentration Bharathapuzha rivers Multi variate analysis Natural radioactivity Natural radionuclides Physiographic regions Radionuclide activity Specific magnetic susceptibility Sediments South India is one of the regions in the world that has the highest background radiation levels. In this region, river sediments are used in large quantities as building material. Therefore, the knowledge of the radionuclides distribution in such sediments is important for assessing their potential adverse effects on humans residing in buildings made of sediment material. For this goal, we focus on the determination of the natural radioactivity levels and magnetic properties in sediment samples collected from 33 locations along the southwestern Bharathapuzha river originating from the Anamalai hills. The sediment samples were subdivided into two categories according to particle size. It is observed that the average activity concentrations of 226Ra, 232Th, and 40K in sediment samples varied greatly with granulometric and geological differences. The average values of 226Ra, 232Th, and 40K and its associated radiological hazard parameters for category II samples (particle size between 149 μm and 2 mm) were lower than category I sediment samples (bulk samples). Moreover, the average radionuclide activity concentrations (except for 40K) and the calculated radiation hazard parameters are higher in the lowland region compared to the highland and the midland regions. The mass-specific magnetic susceptibility values ranged widely along the river, as well as between physiographic regions, e.g., average values for category I sediment samples were 950.2 × 10−8, 351.1 × 10−8 and 131.8 × 10−8 m3 kg−1 (for high-, mid- and lowland regions, respectively). Differences between physiographic regions and sediment fractions from both radioactivity determinations and magnetic parameters were analyzed with statistical tests and multivariate analysis, which showed the advantages of using both independent techniques. © 2017, Springer-Verlag Berlin Heidelberg. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_18666280_v76_n7_p_Krishnamoorthy http://hdl.handle.net/20.500.12110/paper_18666280_v76_n7_p_Krishnamoorthy |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Bharathapuzha river sediments Magnetic measurements Natural radioactivity Statistical analysis Hazards Magnetic susceptibility Magnetic variables measurement Magnetism Multivariant analysis Particle size Radiation Radiation hazards Radioactivity Radioisotopes Radiometry Rivers Statistical methods Activity concentration Bharathapuzha rivers Multi variate analysis Natural radioactivity Natural radionuclides Physiographic regions Radionuclide activity Specific magnetic susceptibility Sediments |
| spellingShingle |
Bharathapuzha river sediments Magnetic measurements Natural radioactivity Statistical analysis Hazards Magnetic susceptibility Magnetic variables measurement Magnetism Multivariant analysis Particle size Radiation Radiation hazards Radioactivity Radioisotopes Radiometry Rivers Statistical methods Activity concentration Bharathapuzha rivers Multi variate analysis Natural radioactivity Natural radionuclides Physiographic regions Radionuclide activity Specific magnetic susceptibility Sediments Potential effect of natural radionuclides in riverbed sediments: a statistical approach based on granulometric and magnetic mineral differences |
| topic_facet |
Bharathapuzha river sediments Magnetic measurements Natural radioactivity Statistical analysis Hazards Magnetic susceptibility Magnetic variables measurement Magnetism Multivariant analysis Particle size Radiation Radiation hazards Radioactivity Radioisotopes Radiometry Rivers Statistical methods Activity concentration Bharathapuzha rivers Multi variate analysis Natural radioactivity Natural radionuclides Physiographic regions Radionuclide activity Specific magnetic susceptibility Sediments |
| description |
South India is one of the regions in the world that has the highest background radiation levels. In this region, river sediments are used in large quantities as building material. Therefore, the knowledge of the radionuclides distribution in such sediments is important for assessing their potential adverse effects on humans residing in buildings made of sediment material. For this goal, we focus on the determination of the natural radioactivity levels and magnetic properties in sediment samples collected from 33 locations along the southwestern Bharathapuzha river originating from the Anamalai hills. The sediment samples were subdivided into two categories according to particle size. It is observed that the average activity concentrations of 226Ra, 232Th, and 40K in sediment samples varied greatly with granulometric and geological differences. The average values of 226Ra, 232Th, and 40K and its associated radiological hazard parameters for category II samples (particle size between 149 μm and 2 mm) were lower than category I sediment samples (bulk samples). Moreover, the average radionuclide activity concentrations (except for 40K) and the calculated radiation hazard parameters are higher in the lowland region compared to the highland and the midland regions. The mass-specific magnetic susceptibility values ranged widely along the river, as well as between physiographic regions, e.g., average values for category I sediment samples were 950.2 × 10−8, 351.1 × 10−8 and 131.8 × 10−8 m3 kg−1 (for high-, mid- and lowland regions, respectively). Differences between physiographic regions and sediment fractions from both radioactivity determinations and magnetic parameters were analyzed with statistical tests and multivariate analysis, which showed the advantages of using both independent techniques. © 2017, Springer-Verlag Berlin Heidelberg. |
| title |
Potential effect of natural radionuclides in riverbed sediments: a statistical approach based on granulometric and magnetic mineral differences |
| title_short |
Potential effect of natural radionuclides in riverbed sediments: a statistical approach based on granulometric and magnetic mineral differences |
| title_full |
Potential effect of natural radionuclides in riverbed sediments: a statistical approach based on granulometric and magnetic mineral differences |
| title_fullStr |
Potential effect of natural radionuclides in riverbed sediments: a statistical approach based on granulometric and magnetic mineral differences |
| title_full_unstemmed |
Potential effect of natural radionuclides in riverbed sediments: a statistical approach based on granulometric and magnetic mineral differences |
| title_sort |
potential effect of natural radionuclides in riverbed sediments: a statistical approach based on granulometric and magnetic mineral differences |
| publishDate |
2017 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_18666280_v76_n7_p_Krishnamoorthy http://hdl.handle.net/20.500.12110/paper_18666280_v76_n7_p_Krishnamoorthy |
| _version_ |
1768543203598794752 |