Transfer factor of natural radionuclides from soil to silhouette plants using gamma spectroscopy

2020 ◽  
Author(s):  
Ali Abdulwahab Ridha ◽  
Athraa Naji Jameel ◽  
Nada Farhan Kadhim
Keyword(s):  
Transfer Factor ◽  
Gamma Spectroscopy ◽  
Natural Radionuclides

scholarly journals Assessment of Natural Radioactivity Levels and Radiation Hazards for Soil Samples Used in Erbil Governorate, Iraqi Kurdistan

2019 ◽  
Vol 7 (1) ◽  
pp. 34 ◽  
Author(s):  
Zakariya A. Hussein
Keyword(s):  
Natural Radioactivity ◽  
Gamma Spectroscopy ◽  
Health Hazard ◽  
Natural Radionuclides ◽  
Soil Samples ◽  
Radiation Hazard ◽  
Lifetime Cancer Risk ◽  
Iraqi Kurdistan ◽  
Activity Concentrations ◽  
Radium Equivalent

In this work, the activity concentrations of natural radionuclides 226Ra, 232Th and 40K in soil samples from Erbil governorate, Iraqi Kurdistan were investigated by a gamma-spectroscopy system based on high-purity germanium (HPGe) detector. This is to assess the dose of radionuclides exposure to the population, knowing the health risks and to have a baseline for future changes in the environmental radioactivity. It was found that the activity concentrations of 226Ra, 232Th and 40K were ranged from (14.6 ± 1.6 to 38.2 ± 2.8 Bq.kg-1),  (4.5 ± 1.4 to 52.4 ± 5.8 Bq.kg-1) and ( 302.8 ± 12.6 to 388.6 ± 12.8 Bq.kg-1), respectively. The measured activity concentrations for these radionuclides were compared with the reported data of other countries and with the worldwide average activity of soil. Radium equivalent activities, absorbed dose rate, excess lifetime cancer risk and the values of hazard indices were calculated for the measured samples to assess the radiation hazard of the natural radioactivity in all samples to the people. It was concluded that the radium equivalent activities of the studied samples are below the internationally accepted values. These results show that annual effective dose absorbed via occupant from activity construction of soil samples used in the under place is below 1.0 mSv.y-1. It is concluded that the assessment radioactivity of soil are within acceptable levels and does not pose any health hazard to the population.

scholarly journals Determination of radionuclides in Mytilus galloprovicialis by Alpha And Gamma-Spectroscopy

2004 ◽  
Vol 5 (1) ◽  
pp. 117 ◽  
Author(s):  
H. FLOROU ◽  
K. KEHAGIA ◽  
CH. CHALOULOU ◽  
V. KOUKOULIOU ◽  
CH. LYKOMITROU
Keyword(s):  
Mytilus Galloprovincialis ◽  
Gamma Spectroscopy ◽  
Natural Radionuclides ◽  
Aegean Sea ◽  
Radioactive Pollution ◽  
Activity Concentrations ◽  
North Aegean ◽  
Concentration Factors ◽  
North Aegean Sea

The natural radionuclides 238U ,234Th, 40K and the main man-made 137Cs, have been studied in Mytilus galloprovincialis (Lamarck, 1819) sampled in the Thermaikos gulf – North Aegean Sea, considered as a bioindicator for radiological assessment in the Mediterranean. The ratio 234U/238U has also been determined. In terms of 137Cs, the activity concentrations in seawater from the studied area have been measured as well, and the concentration factors of 137Cs in Mytilus galloprovincialis are given as a parameter of the organism response to radioactive pollution.

scholarly journals Sassi of Matera Building Material: High-Resolution Gamma-Ray Spectroscopy Characterization for Radioprotection

Buildings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 258
Author(s):  
Valeria Artiola ◽  
Giuseppe La Verde ◽  
Vittoria D’Avino ◽  
Mariagabriella Pugliese
Keyword(s):  
Building Material ◽  
Gamma Ray ◽  
Gamma Spectroscopy ◽  
Natural Radionuclides ◽  
Construction Materials ◽  
Point Of View ◽  
Level Of Activity ◽  
Gamma Index ◽  
Radiological Safety ◽  
Landscape Heritage

The Sassi of Matera (Basilicata region, southern Italy) is a peculiar site, but not unique in Italy, from a landscape point of view. Most of the buildings are excavated in rocks of calcarenite origin and used as homes and accommodation facilities. For this reason, the contribution of gamma radiation to the population due to this building material has been investigated for the first time. Even though the type of rock is not mentioned among the construction materials indicated in Italian Legislative Decree 101/2020 to be subjected to radiological characterization, the methodology indicated in the decree was applied, comparing the values with those present in the literature. The content of 226Ra, 232Th and 40K was then investigated with gamma spectroscopy, and the gamma index was calculated. The results obtained showed a low level of activity concentration of natural radionuclides in this type of stone, confirming the radiological safety. This result can also support the recovery and restoration initiatives for these buildings to conserve the architectural and landscape heritage of this village.

scholarly journals Distribution of some natural and anthropogenic radionuclides in the sediments and seawater along the coastal areas of North Sulawesi

2021 ◽  
Vol 890 (1) ◽  
pp. 012005
Author(s):  
D I P Putra ◽  
W R Prihatiningsih ◽  
M Makmur ◽  
M N Yahya ◽  
Y Priasetyono ◽  
...  
Keyword(s):  
Activity Concentration ◽  
Gamma Spectroscopy ◽  
Natural Radionuclides ◽  
Coastal Areas ◽  
Radioactive Cesium ◽  
Anthropogenic Radionuclides ◽  
Sediment Samples ◽  
Average Value ◽  
North Sulawesi ◽  
Radionuclide Distribution

Abstract Studies on the radionuclide distribution of some naturally occurring radioactive materials (NORM) and anthropogenic radionuclides in the sediments of the coastal areas of North Sulawesi were conducted to provide baseline data for the effective monitoring of radioactive fallout in these areas. Sediment samples were collected by a van Veen grab samples about 100 – 300 m from the shoreline, and 60 L of seawater was pre-concentration to precipitated 137Cs. Activity concentration of the three main natural radionuclides (222Ra, 232Th, and 40K) and 137Cs were determined using a high-resolution HPGe gamma-spectroscopy system and presenting background about the radiological levels and assessing the associated hazards. The activity of 226Ra ranged from 2.1 to 9.5 Bq kg−1 with an average value of 5.9 Bq kg−1. The activity of 232Th varies from 2.4 to 10.4 Bq kg−1 with an average value of 5.2 Bq kg−1. The 40K ranges between 169.1 to 492.7 Bq kg−1 with an average value of 238.8 Bq kg−1. The average activity concentration of 40K (238.8 Bq kg−1) in the sediment samples was lower than the worldwide average concentration (420 Bq kg−1). The current level of activity 137Cs varied from 0.05 to 0.40 Bq kg−1 in sediment samples and 0.98 to 1.33 Bq m−3 in seawater samples. 134Cs in all samples were not detected or below the detection limit. This fact indicated that radioactive cesium in Celebes Sea areas of North Sulawesi still originated from global fallout and insignificant influenced by the FDNPP accident. All radionuclide radiation values in the recent study are lower than the world average. Therefore, the potential danger of radiation generated from the surrounding environment has not yet caused a radiological health impact for the people living on the coast of North Sulawesi. Natural and artificial radionuclide activity data in this study will be used as the basis for sedimentary activity along the coast of North Sulawesi.

scholarly journals Natural Radioactivity and Radon Exhalation from Building Materials in Underground Parking Lots

2021 ◽  
Vol 11 (16) ◽  
pp. 7475
Author(s):  
Dainius Jasaitis ◽  
Milda Pečiulienė
Keyword(s):  
Dose Rate ◽  
Building Materials ◽  
Activity Concentration ◽  
Gamma Spectroscopy ◽  
Natural Radionuclides ◽  
Equivalent Dose ◽  
Strong Positive Correlation ◽  
Radon Exhalation ◽  
Parking Lots ◽  
Equivalent Dose Rate

The change of natural ionizing radiation and the radon exhalation rates from typical building materials in underground parking lots are presented in the article. The activity concentration of natural radionuclides 232Th, 226Ra, and 40K in six important types of construction materials, which are mostly used in Lithuania, were analyzed using high-resolution gamma spectroscopy. The highest values were found in concrete and ferroconcrete samples: 226Ra 44 and 90 Bq kg−1; 232Th 29 and 34 Bq kg−1; 40K 581 and 603 Bq kg−1. A strong positive correlation (0.88) was observed between radium activity concentration and radon concentration. The activity indexes (Iα and Iγ) and radium equivalent activity (Req) evaluating the suitability of materials for such constructions from the view of radiation safety were determined. The average values of the calculated absorbed dose rate in samples ranged from 18.24 nGy h−1 in the sand to 87.26 nGy h−1 in ferroconcrete. The calculated annual effective dose was below the limit of 1.0 mSv y−1. The values of the external and internal hazards index (Hex and Hin) were all below unity, and the values of Iγ and Iα were below the recommended levels of 0.5 and 1. Dosimetric analysis of underground parking lots was carried out. It was determined that the external equivalent dose rate caused by the 222Rn progeny radiation in the underground car parking lots varies from 17 to 30% of the total equivalent dose rate.

scholarly journals ASSESSMENT OF RADIOACTIVITY LEVELS AND TRANSFER FACTOR OF NATURAL RADIONUCLIDES AROUND IRON AND STEEL SMELTING COMPANY LOCATED IN FASHINA VILLAGE, ILE-IFE, OSUN STATE, NIGERIA

2019 ◽  
pp. 241 ◽  
Author(s):  
Samuel Oluwafisayo Oluyide ◽  
Pascal Tchokossa ◽  
Fisayo Cornelus Akinyose ◽  
Muyiwa Michael Orosun
Keyword(s):  
Transfer Factor ◽  
Water Samples ◽  
Natural Radionuclides ◽  
Food Samples ◽  
Steel Smelting ◽  
Secular Equilibrium ◽  
Iron And Steel ◽  
In Situ Investigation ◽  
The Mean ◽  
Radioactivity Levels

This study assessed the radioactivity levels and transfer factor of natural radionuclides around iron and steel smelting company located in Fashina village, Ile-Ife, Osun State, Nigeria. This was with a view to evaluate the exposure rate of the study area, determine the radionuclides present and activity concentration (238U and 232Th and 40K) in the samples and evaluate the soil-to-food transfer ratio of the radionuclides. A portable survey meter with a Global Positioning System (GPS) were used for in-situ investigation and a well-calibrated NaI(Tl) detector system was used for the radioactivity measurement of the samples. A total of 38 samples comprising soil, food and water were collected at the study area (Fashina) and control area (Opa) in Osun state, Nigeria for spectrometry analysis. The soil and food samples were oven dried, pulverized and sieved while water samples were acidified with 10 mL of 11 M HCl per litre to prevent adsorption of radionuclides with the wall of the container. All the samples were then sealed and kept for at least 28 days in radon impermeable cylindrical container so as to reach secular equilibrium. The mean exposure rates in the study area were 0.14 µSv hr-1 and 0.12 µSv hr-1 for the control environment. The mean radioactivity content obtained for 238U, 232Th and 40K were 12.14 ± 4.17 Bq kg-1, 23.23 ± 7.67 Bq kg-1 and 270.14 ± 61.79 Bq kg-1 respectively in soil samples and 8.56 ± 2.80 Bq kg-1, 13.17 ± 4.48 Bq kg-1 and 89.41 ± 24.15 Bq kg-1 respectively in food samples. Similarly it was 7.64 ± 2.95 Bq L-1, 10.04 ± 3.43 Bq L-1 and 69.04 ± 15.49 Bq L-1 respectively for 238U, 232Th and 40K in water samples. The transfer factor from soil to food for 238U, 232Th and 40K were calculated from the activity concentrations of soil and food, while the means were 0.73, 0.61, and 0.39 respectively in the study area.

scholarly journals Effect of Fukushima Accident on Fishes and Fish Like other Foods Collected from the Bay of Bengal and Karnaphuli River, Bangladesh

2018 ◽  
Vol 40 (1) ◽  
pp. 75-96
Author(s):  
Akhi Das Gupta ◽  
Md Kowsar Alam ◽  
Shyamal Ranjan Chakraborty ◽  
AKM Rezaur Rahman ◽  
SI Bhuian ◽  
...  
Keyword(s):  
Bay Of Bengal ◽  
Activity Concentration ◽  
Specific Activity ◽  
Gamma Spectroscopy ◽  
Natural Radionuclides ◽  
Research Work ◽  
Hazard Index ◽  
Artificial Radionuclide ◽  
Fukushima Accident ◽  
The Mean

An experiment was carried out to assess the radiological exposure due to the intake of fishes and fish like foods from some common estuary (Karnaphuli River) and Marine (Bay of Bengal) contaminated by Fukushima Reactor Accident, if any, by using gamma spectroscopy. The analysis was done to estimate the radioactivity concentrations due to natural radionuclides namely 238U, 232Th and 40K and artificial radionuclide 137Cs in Karnaphuli estuary and Chittagong city adjoining Bay of Bengal fish and fish-like samples. The activity concentration for 238U in all the samples ranged from 0.10615 ± 0.0000 to 2.4767 ± 0.0005 Bq.kg-1 with the mean of 0.6109 ± 0.0001 Bq.kg-1. The Activity of 232Th ranged from 0.0009 ± 0.0000 to 0.0273 ± 0.0000 Bq.kg-1 with the mean of 0.0074 ± 0.0000 Bq.kg-1. The activity concentration for 40K was found to be in the range from 1.5516 ± 0.0311 to 74.8658 ± 0.2532 Bq.kg-1 with the mean of 24.9533 ± 0.0702 Bq.kg-1. The artificial radionuclide 137Cs was not found in any of the samples. The specific activity values for most of the sample were within the permissible limits. The average effective dose and internal hazard index due to consumption of those fishes and fish-like foods was found to be 0.1 mSv.y-1 and 0.0085 ± 0.0000 mSv.y-1 respectively. The research work showed that the consumers of concerned fishes and fish-like foods of the Chittagong area have no risk of radioactivity ingestion even though no amount of radiation is assumed to be totally safe. The Chittagong Univ. J. Sci. 40(1) : 75-96, 2018

scholarly journals Transfer of 238U and 232Th from soils to tea leave sin LuongMy farm, HoaBinh province, Viet Nam

2019 ◽  
Vol 35 (4) ◽  
Author(s):  
Hoang Huu Duc ◽  
Nguyen Duc Minh ◽  
Phan Viet Cuong ◽  
Le Toan Anh ◽  
Loat Bui Van ◽  
...  
Keyword(s):  
Transfer Factor ◽  
Gamma Spectroscopy ◽  
Natural Uranium ◽  
Uranium Isotopes ◽  
Viet Nam ◽  
Transfer Factors ◽  
Research Results ◽  
Tea Tree ◽  
Activity Concentrations ◽  
Plant Transfer

The soil-to-plant transfer factors of natural uranium isotopes (238U and 232Th)  were studied in Luong My tea farm, Tan Thanh district, Luong Son commune, HoaBinh province. The activity concentrations in leaves, trunk and root were determined for the tea tree at no harvest period (winter break). The measurements were carried out using gamma spectroscopy with high puritygermanium detector HPGe. Research results show that the activity of 238U and 232Th is higher in leaves than in trunk and roots.Soil-leaves transfer factor (TF) for238U and 232Th were as follows:TFU238 = 0,52 – 0,87; TFTh-232 = 0,25 – 0,43.

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