Activity concentrations and radiological hazard assessments of 226Ra, 232Th, and 40K in soil samples of oil-producing areas of South Africa

2021 ◽  
pp. 1-13
Author(s):  
Abiola Olawale Ilori ◽  
Naven Chetty
Keyword(s):  
South Africa ◽  
Soil Samples ◽  
Radiological Hazard ◽  
Activity Concentrations ◽  
Hazard Assessments

scholarly journals Measurement of the Natural Radioactivity and Radiological Hazard of Soil, Sand and Sediment Samples Collected from Coastal Area, Cox’s Bazar, Bangladesh

2015 ◽  
Vol 39 (2) ◽  
pp. 233-240
Author(s):  
Sariful ◽  
Suranjan Kumar Das ◽  
Md Murad Ahmed ◽  
Selina Yeasmin
Keyword(s):  
Germanium Detector ◽  
Absorbed Dose ◽  
Soil Samples ◽  
Radiological Hazard ◽  
Absorbed Dose Rate ◽  
Sediment Samples ◽  
High Purity Germanium ◽  
Activity Concentrations ◽  
Effective Doses ◽  
Academy Of Sciences

The radioactivity concentrations of 24 samples of soil and sand sediments from Cox’s Bazar were determined using high purity germanium detector. The results of 226Ra, 232Th and 40K in the soil samples were found to vary from 15.34 ± 1.66 to 33.70 ± 2.08 Bq/kg, 30.09 ± 3.62 to 58.06 ± 4.23 Bq/kg and 379.99 ± 33.43 to 755.26 ± 38.03 Bq/kg, respectively. For sand samples the activity concentrations were between 8.98 ± 1.49 to 31.33 ± 2.04 Bq/kg, 16.82 ± 3.24 to 63.28 ± 4.37 Bq/kg and 252.42 ± 31.72 to 565.72 ± 35.78 Bq/kg, respectively, for sediment samples values were 13.90 ± 1.64 to 38.41 ± 2.19 Bq/kg, 37.94 ± 3.82 to 51.92 ± 4.11 Bq/kg and 367.70 ± 33.28 to 665.05 ± 36.97 Bq/kg, 367.70 ± 33.28 to 665.05 ± 36.97 Bq/kg, respectively. The absorbed dose rate of soil, sand and sediment samples were found as 79.98, 77.17, and 57.86 nGy/h, respectively. Outdoor annual effective doses were 0.49, 0.47 and 0.36 mSv/y.Journal of Bangladesh Academy of Sciences, Vol. 39, No. 2, 233-240, 2015

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.

scholarly journals Comparative Study of Natural Radioactivity and Radiological Hazard Parameters of Various Imported Tiles Used for Decoration in Sudan

Symmetry ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 746 ◽  
Author(s):  
Saifeldin Siddeeg ◽  
Mohamed Suliman ◽  
Faouzi Ben Rebah ◽  
Wissem Mnif ◽  
Amel Ahmed ◽  
...  
Keyword(s):  
Natural Radioactivity ◽  
Hazard Index ◽  
Absorbed Dose ◽  
Ceramic Materials ◽  
Radiological Hazard ◽  
Absorbed Dose Rate ◽  
Mean Values ◽  
Activity Concentrations ◽  
Materials Used ◽  
Hazard Parameters

Various commercially imported ceramic materials used in the building of Sudanese dwellings were examined in order to determine their natural radioactivity and radiological hazard parameters. In this context, twenty-five different consignments were sampled and analyzed using (3″ × 3″) sodium iodide gamma spectrometry system NaI(Tl). The identified average activity concentrations of 238U, 232Th, and 40K were 183 ± 70, 51 ± 44, and 238 ± 77 Bq/kg dry-weights, respectively. A positive correlation between 238U and 232Th in the investigated samples was identified from the observed significant correlation (R2 = 0.8). Interestingly, a low Th/U ratio (~0.3) was recorded, which could be related to the systematic loss of thorium during the fabrication process. The measured activity concentrations for these radionuclides were comparable with the reported data obtained from similar materials used in other countries showing similarity in ceramic materials used in buildings. Five different radiation indices, such as the average radium equivalent (Raeq), the absorbed dose rate (D), the annual effective dose equivalent (AEDE), the external hazard index (Hex), and the radioactivity level index (lγ), which indicate hazardous radiation, were estimated from these measurements. The obtained results revealed average values of 274 ± 106 Bq/kg, 125 ± 48 nGy/h, 1.23 ± 0.48 mSv/y, 0.74 ± 0.29, and 0.94 ± 0.37, for Raeq, D, AEDE, Hex, and lγ, respectively. The mean values of Raeq and Hex were in good agreement with the international limits, while the means of D and lγ were higher than the universal values. Calculated AEDE in about 60% of the samples exceeded the universal limit of 1 mSv/y for the public exposure (maximum value of 2.16 mSv/y). The investigated parameters were in the same range for the majority of imported samples; however, they were slightly higher than the locally produced ceramic, highlighting the importance of monitoring imported materials for their radioactivity contents.

Measurement of activity concentrations of 40K, 238U and 232Th in soil samples of Agastheeswaram taluk, Kanyakumari district, India

2005 ◽  
Vol 1276 ◽  
pp. 319-320 ◽  
Author(s):  
D. Khanna ◽  
J. Malathi ◽  
G.M. Brahmanandhan ◽  
S. Selvasekarapandian
Keyword(s):  
Soil Samples ◽  
Activity Concentrations

scholarly journals Determination of the activity concentration levels of the artificial radionuclide137Cs in soil samples collected from Qatar using high-resolution gamma-ray spectrometry

2016 ◽  
Vol 44 ◽  
pp. 1660237
Author(s):  
Huda Al-Sulaiti ◽  
Tabassum Nasir ◽  
K. S. Al Mugren ◽  
N. Alkhomashi ◽  
N. Al-Dahan ◽  
...  
Keyword(s):  
High Resolution ◽  
Nuclear Power ◽  
Activity Concentration ◽  
Gamma Ray ◽  
Germanium Detector ◽  
Soil Samples ◽  
Gamma Ray Spectrometry ◽  
Activity Concentrations ◽  
High Resolution Gamma

The goal of this study was to establish the first baseline measurements for radioactivity concentration of the artificial radionuclide [Formula: see text]Cs in soil samples collected from the Qatarian peninsula. The work focused on the determination of the activity concentrations levels of man-made radiation in 129 soil samples collected across the landscape of the State of Qatar. All the samples were collected before the most recent accident in Japan, “the 2011 Fukushima Dai-ichi nuclear power plant accident”. The activity concentrations have been measured via high-resolution gamma-ray spectrometry using a hyper-pure germanium detector situated in a low-background environment with a copper inner-plated passive lead shield. A radiological map showing the activity concentrations of [Formula: see text]Cs is presented in this work. The concentration was[Formula: see text]found to range from 0.21 to 15.41 Bq/kg. The highest activity concentration of [Formula: see text]Cs was observed in sample no. 26 in North of Qatar. The mean value was found to be around 2.15 ± 0.27 Bq/kg. These values lie within the expected range relative to the countries in the region. It is expected that this contamination is mainly due to the Chernobyl accident on 26 April 1986, but this conclusion cannot be confirmed because of the lack of data before this accident.

scholarly journals Spatial Distribution of DDT and Its Metabolites in Soils from Indoor Residual Spraying in Tshilamusi Village, Limpopo

2018 ◽  
Author(s):  
Wilson Gitari ◽  
Tonderai Makoni ◽  
Vernon Somerset ◽  
Omotola Babajide
Keyword(s):  
South Africa ◽  
Spatial Distribution ◽  
Strong Correlation ◽  
Surface Soil ◽  
Indoor Residual Spraying ◽  
Soil Samples ◽  
Environmental Matrices ◽  
Strict Adherence ◽  
Vhembe District ◽  
Concentration Levels

The continued application of organochlorine pesticides (OCPs) in indoor residual spraying has posed significant threat to human health in Northern part of South Africa, despite its ban. In this study, we investigated the occurrence and spatial distribution of DDTs and its metabolites in surface soil (30 samples) collected in and around the spray homesteads; demarcated into three concentric zones A, B, C in Tshilamusi Vhembe district, South Africa. DDTs were the most abundant of all the OCPs chemicals found in soil samples. The concentrations of DDT range from 12.19 to 65.69 µg/kg, with the highest occurring at zone A which is the zone of application. DDTs and all its metabolites considered in this study were found in appreciable concentrations in soil of Zones B and C, far from spray sites. The results showed a strong correlation between distance and concentration levels of DDTs and its metabolites. However, there is a need for proper monitoring of OCPs chemicals in other environmental matrices as well as relevant agencies enforcing strict adherence to regulations on consumption of OCPs.

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.

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