Dose assessments from the measured radioactivity in soil, rock, clay, sediment and food crop samples of an elevated radiation area in south-western Nigeria

Jibiri, N. N.; Isinkaye, Matthew Omoniyi; Bello, I.; Olaniyi, P. G.

doi:10.1007/s12665-015-4819-3

Cited by 23 publications

(11 citation statements)

References 55 publications

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“…By using the standard room model with dimensions of 4 m Â 5 m Â 2.8 m, the average world value of the absorbed dose rate is 55 nGyh À1 (Ahmad, Jaafar, & Alsaffar, 2015). The annual effective dose is calculated by applying the dose conversion factor of 0.7 SvGy À1 with 0.8 as an indoor occupancy factor (Jibiri, Isinkaye, Bello, & Olaniyi, 2016;UNSCEAR, 2000):…”

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confidence: 99%

Estimation of natural radioactivity in local and imported polished granite used as building materials in Saudi Arabia

Al-Zahrani

2017

Journal of Radiation Research and Applied Sciences

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Measurements of natural radioactivity in local and imported samples of commercial granites used in Saudi Arabia were carried out by using gamma-ray spectroscopy with hyper-pure germanium detector. The activity concentrations measured of granite samples were determined for 226 Ra(from 1.53 to 77.16 Bq kg À1), 232 Th (from 0.51 to 89.82 Bq kg À1) and 40 K (from 19.47 to 1632.37 Bq kg À1). The corresponding average activity concentrations for 226 Ra, 232 Th and 40 K were 28.82, 34.83 and 665.08 Bq kg À1 , respectively. The radiological hazard parameters (radium equivalent, gamma index, external index, internal index, absorbed dose and annual effective dose) were calculated to assess the radiation hazards associated with granite samples. The obtained results are lower than the recommended limits. The results were compared with the published data of other countries. The measurements will help in the development of standards and guidelines for the use and management of these materials.

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confidence: 99%

Estimation of natural radioactivity in local and imported polished granite used as building materials in Saudi Arabia

Al-Zahrani

2017

Journal of Radiation Research and Applied Sciences

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“…Resolution of the detector is about 8% at 0.662 MeV of 137 Cs. In order to reduce statistical uncertainty, each soil sample was counted for 10 h [19]. Determination of environment background count in the laboratory was carried out by counting empty sample container which has the same geometry as the ones containing soil and groundwater samples.…”

Section: Measurement Of Activity Concentration Of 226 Ramentioning

confidence: 99%

Correlations of 226Ra and 222Rn activity concentrations in surface soil and groundwater of basement complex geological area of southwest Nigeria

Isinkaye

Ajiboye

2020

SN Appl. Sci.

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The quantitative evaluations of naturally occurring radioisotopes in environmental media have provided significant information on the geological and radiological characteristics of different environments around the world. In furtherance to a preliminary study within southwest Nigeria set out to determine the distribution of 222 Rn in groundwater and soil gas, the present study employed a well-shielded NaI(Tl) and RAD 7 detectors to determine activity concentrations of 226 Ra and 222 Rn in the media. Samples were collected from 100 sampling sites spatially distributed within the study area. Multivariate statistics were employed to extract the relationships between the activity concentrations of 226 Ra and 222 Rn in order to ascertain their origin and behavior in the basement complex geological area of southwest Nigeria. The mean activity concentration of 226 Ra falls below the world average value of 35 Bq kg −1 in soil as reported by UNSCEAR, and 222 Rn mean activity concentration is lower than 100 Bq l −1 recommended by WHO and European Commission as the criterion level in utility water for the members of the public. It can therefore be concluded that there is no significant radiological risks to the environment and human health due the presence of the measured radionuclides in soil and groundwater.

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“…The absorbed dose can be converted to the annual effective dose equivalent by using the conversion factor 0.7 Sv/Gy (UNSCEAR,2000) and the indoor occupancy factor of 0.8, based on people spending an average of 80% of their time indoors and 20% outdoors (Jibiri, 2016). The total annual effective dose (AE, the external dose rates) from the 226 Ra, 232 Th, and 40 K is obtained by using the following equation (Giri, 2013):…”

Section: Calculationsmentioning

confidence: 99%

“…Coffee comes from the plant genus Coffea, which has two primary species, C. arabica (Arabica) and C. canephora (also known as C. robusta, or robusta). Some naturally occurring radioisotopes and other elements present in soil are drawn into the roots of plants via ion channels or specific transporters (Sugiyama et al, 2009;Jibiri et al, 2016). Their distribution throughout the plant tissues depends on their chemical characteristics and several parameters of soil and the plants themselves (Awudu, 2012).…”

Section: Introductionmentioning

confidence: 99%

Radiological hazard of coffee to humans: a comparative study of Arabian and Turkish coffees

Alharbi¹,

Alamoudi²

2017

Afr. J. Agric. Res.

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Thirty-nine Arabian and Turkish coffee powder samples purchased from various markets in SaudiTh were found to be 2.57 to 10.63 Bq/kg and nondetectable to 8.01 Bq/kg for Arabian coffee and nondetectable to 10.09 Bq/kg and nondetectable to 9.75 Bq/kg for Turkish coffee, respectively. Based on these values, we estimated the potential radiological hazards to consumer health from coffee powder. We determined the radium equivalent, annual effective dose rate, and external and internal hazard for each element, and all were found to be below the limit recommended by the United Nations Scientific Committee on the Effects of Atomic Radiation. However, absorbed dose rate values for some samples were higher than the permissible limit. In all samples, the 137 Cs concentration was below the detection limit. The average annual committed effective dose values reported in this study were far below the world average value of 0.30 mSv/yr for an individual. In addition, the limit for the threshold consumption rate was calculated. The statistical methods were applied to study the relationship between all the calculated natural radionuclides and their hazard parameters. Results indicated that the use of these types of coffee had no significant radiological health risks. This study may contribute data on coffee powder for formulating regulations related to radiological health care.

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Dose assessments from the measured radioactivity in soil, rock, clay, sediment and food crop samples of an elevated radiation area in south-western Nigeria

Cited by 23 publications

References 55 publications

Estimation of natural radioactivity in local and imported polished granite used as building materials in Saudi Arabia

Estimation of natural radioactivity in local and imported polished granite used as building materials in Saudi Arabia

Correlations of 226Ra and 222Rn activity concentrations in surface soil and groundwater of basement complex geological area of southwest Nigeria

Radiological hazard of coffee to humans: a comparative study of Arabian and Turkish coffees

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