Assessment of the natural radioactivity and radiological hazards in granites of Mueilha area (South Eastern Desert, Egypt)

El-Gamal, Hany; Sidique, Essam; El-Haddad, Mervat; Farid, Mohamed

doi:10.1007/s12665-018-7880-x

Cited by 21 publications

(23 citation statements)

References 26 publications

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“…Clearly, the average effective dose ascertained from our example is much lower than the reference estimation of 2.4 mSv y −1 announced by UNSCEAR (1993). 232 Th, and 40 K outcomes demonstrate that they have higher activity concentrations than the worldwide average (35, 30, and 400 Bq kg −1 , respectively, 226 Ra, 232 Th, and 40 K) of these radionuclides (El-Gamal, Sidique, El-Haddad, & El-Azab Farid, 2018;UNSCEAR, 2000). The 40 K activity level in the soil specimens was observed to be substantially higher than 226 Ra and 232 Th; this might be because of the way that natural radioactivity initially relies upon the land conditions, in summary, 40 K activity is higher than the activity of thorium and radium and its descendants.…”

Section: Effective Doses Due To Ingestionmentioning

confidence: 96%

Evaluation of natural radioactivity levels in soil and various foodstuffs from Delta Abyan, Yemen

El-Gamal

Hussien

Saleh

2019

Journal of Radiation Research and Applied Sciences

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The main purpose of this study was to measure the natural radioactivity in some foodstuffs and agricultural soils from the Abyan Delta in Yemen and study the interaction between soil and foodstuffs by calculating the transfer factor (TF).The annual effective doses to individuals were also calculated and compared with the reference levels. The investigation yielded outcomes that can be considered as the initial phase in the computation of levels of radioactivity for a staple foodstuff in Yemen. The activity concentrations of 226 Ra, 232 Th and 40 K were determined by using the high purity germanium (HPGe) gamma ray spectrometer. In agricultural soils, the mean activity concentrations of 226 Ra, 232 Th and 40 K were 33.15 Bq kg −1 , 77.25 Bq kg −1 , and 1220.59 Bq kg −1 , respectively, while the maximum values in foodstuffs were 4.88 ± 0.30, 2.50 ± 0.14 and 351.30 ± 11.25 (Bq Kg −1 ), respectively. The average TF of 232 Th and 40 K were lower than the default values of 0.05 and 1.00 respectively, but the average TF value of 226 Ra was slightly higher than the reference value of 0.04. The average effective dose to individuals from the intake of the food types was 8.448 µSv y −1 , which is much lower than the worldwide average annual effective dose.

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Section: Effective Doses Due To Ingestionmentioning

confidence: 96%

Evaluation of natural radioactivity levels in soil and various foodstuffs from Delta Abyan, Yemen

El-Gamal

Hussien

Saleh

2019

Journal of Radiation Research and Applied Sciences

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“…Since the gonads are organs of interest, the annual gonadal dose equivalent (AGDE) was calculated using the following equation [11][12][13][14]:…”

Section: Annual Gonadal Dose Equivalentmentioning

confidence: 99%

Assessment of natural radioactivity and its radiological hazards in several types of cement used in Senegal

et al. 2020

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In this study, the activity concentrations of 226 Ra, 232 Th and 40 K in twenty cement samples of four types (CEM, CEM II, CEM III, and CEM IV) collected from building material suppliers in Senegal were measured using a low-background digital gamma-ray spectrometer equipped with broad energy germanium detector. The activity concentrations of 226 Ra, 232 Th and 40 K varied from 7.1-150.3 Bq kg −1 , 3.7-16.1 Bq kg −1 , and 48.7-133.9 Bq kg −1 , respectively. Also, possible radiological risks from the usage of these materials were assessed by estimating external and internal index, indoor absorbed gamma dose rate and the corresponding annual effective dose, effective dose rate to different body organs and tissus, and excess lifetime cancer risk. The estimated radiological hazard indices were revised in light of the relevant national and international legislation and guidance. The values of the radiological hazard indices were found to be within relevant all limit values for structural building materials.

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“…El Mueilha is medium to coarse grained granite. It is commonly pink, turns whitish towards the external parts and along fault planes [27][28][29].…”

Section: Geological Setting Of the Southern Part Of The Study Area (Smentioning

confidence: 99%

“…ELCR = AEDR × DL × RF (11) where (DL) is life expectancy, considered to be 70 years, and (RF) is the risk factor referred to as cancer risk per sievert (for stochastic effects, RF value is 0.05 for the public (ICRP [41])). All of these parameters were discussed in detail by El-Gamal et al [26,27]. Table 1 summarizes ranges and mean values of the specific activity concentrations of 238 U, 226 Ra, 232 Th, and 40 K in the studied rocks.…”

Section: Radiological Hazard Indices and Dose Parametersmentioning

confidence: 99%

Spatial Distributions and Risk Assessment of the Natural Radionuclides in the Granitic Rocks from the Eastern Desert, Egypt

2019

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This paper investigates the distribution of four natural radioisotopes 238U, 226Ra, 232Th and 40K in one hundred twenty-five granitic samples covering sixteen mountainous areas situated at the northern, central and southern parts of the Eastern Desert of Egypt (EDE). The concentrations of the examined radioisotopes in the collected samples were recognized utilizing a HPGe detector based gamma spectrometry. The average concentrations of these radioisotopes were higher when compared with the worldwide reference values. The radiation risk indicators including the radium equivalent activity index (Raeq), external and internal hazard indicators (Hex and Hin), external and internal level indicators (Iα and Iγ), absorbed dose rate (ADR), annual effective dose rate (AEDR), annual gonadal dosage equivalent (AGDE), and excess lifetime cancer risk (ELCR), associated with these radioisotopes have been calculated and compared with their recommended global values and safety limits. These indicators showed that the granites from most studied areas exceeded the universal standards pointing to the difficulty of using them as building materials. This study together with future investigations will serve to develop an essential database for future environmental monitoring surveys.

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Assessment of the natural radioactivity and radiological hazards in granites of Mueilha area (South Eastern Desert, Egypt)

Cited by 21 publications

References 26 publications

Evaluation of natural radioactivity levels in soil and various foodstuffs from Delta Abyan, Yemen

Evaluation of natural radioactivity levels in soil and various foodstuffs from Delta Abyan, Yemen

Assessment of natural radioactivity and its radiological hazards in several types of cement used in Senegal

Spatial Distributions and Risk Assessment of the Natural Radionuclides in the Granitic Rocks from the Eastern Desert, Egypt

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