An extended assessment of natural radioactivity in the sediments of the mid-region of the Egyptian Red Sea coast

Zakaly, Hesham M.H.; Uosif, M. A. M.; Issa, Shams A.M.; Tekın, H.O.; Hashim, Madkour; Tammam, Mahmoud; El-Taher, Atef; Alharshan, Gharam A.; Mostafa, Mostafa

doi:10.1016/j.marpolbul.2021.112658

Cited by 44 publications

(13 citation statements)

References 44 publications

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“…The activity concentrations of 238 U, 232 Th, and 40 K, as well as the background in an empty beaker under the same conditions, were estimated after normalizing for background and heterogeneity [19]. The absolute efficiency was calculated using the next isotopes, which included (E γ and I γ %) 133 Ba (80.1 KeV-34.06%) and (356 KeV-62.05%), 137 Cs (661.6 KeV-85.12%), 60 C (1173.2 KeV-99.97% and 1332.5 KeV-99.98%) and 22 Na (1274.5 KeV-99.9%), with specified activities. The IAEA 154 instruction was used to calibrate the detector efficiency [20].…”

Section: Samples Preparation and Measurementsmentioning

confidence: 99%

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An In-Depth Examination of the Natural Radiation and Radioactive Dangers Associated with Regularly Used Medicinal Herbs

Saudi

Abedelkader

Issa

et al. 2022

IJERPH

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The specific activity of U-238 and Th-232, as well as K-40 radionuclides, in twenty-nine investigated medicinal herbs used in Egypt has been measured using a high-purity germanium (HP Ge) detector. The measured values ranged from the BDL to 20.71 ± 1.52 with a mean of 7.25 ± 0.54 (Bq kg−1) for uranium-238, from the BDL to 29.35 ± 1.33 with a mean of 7.78 ± 0.633 (Bq kg−1) for thorium-232, and from 172 ± 5.85 to 1181.2 ± 25.5 with a mean of 471.4 ± 11.33 (Bq kg−1) for potassium-40. Individual herbs with the highest activity levels were found to be 20.71 ± 1.52 (Bq kg−1) for uranium-238 (H4, Thyme herb), 29.35 ± 1.33 (Bq kg−1) for thorium-232 (H20, Cinnamon), and 1181.2 ± 25.5 (Bq kg−1) for potassium-40 (H24, Worm-wood). (AACED) Ingestion-related effective doses over the course of a year of uranium-238 and thorium-232, as well as potassium-40 estimated from measured activity concentrations, are 0.002304 ± 0.00009 (minimum), 0.50869 ± 0.0002 (maximum), and 0.0373 ± 0.0004 (average)(mSv/yr). Radium equivalent activity (Raeq), annual gonadal dose equivalent (AGDE), absorbed gamma dose rate (Doutdoor, Dindoor), gamma representative level index (I), annual effective dose (AEDtotal), external and internal hazard index (Hex, Hin), and excess lifetime cancer risk were determined in medicinal plants (ELCR). The radiological hazards assessment revealed that the investigated plant species have natural radioactivity levels that are well within the internationally recommended limit. This is the first time that the natural radioactivity of therapeutic plants has been measured in Egypt. In addition, no artificial radionuclide (for example, 137Cs) was discovered in any of the samples. Therefore, the current findings are intended to serve as the foundation for establishing a standard safety and guideline for using these therapeutic plants in Egypt.

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Section: Samples Preparation and Measurementsmentioning

confidence: 99%

“…γ (E) is the absolute efficiency of detector. The equations used to calculate the radiological hazards have been discussed in detail in our previous works [22][23][24][25][26][27][28][29][30]. The error associated with every calculation was measured by the standard deviation (SD) equation.…”

Section: Samples Preparation and Measurementsmentioning

confidence: 99%

An In-Depth Examination of the Natural Radiation and Radioactive Dangers Associated with Regularly Used Medicinal Herbs

Saudi

Abedelkader

Issa

et al. 2022

IJERPH

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“…In the Um-Tagir region, the relationship between U and Th/U showed a downward trend for granodiorite, monzogranite, and alkali feldspar granite, but an upward trend for tonalite. The data obtained for granite rocks showed that hydrothermal fluids influenced granodiorite, monzogranite, and alkaline feldspar granite, but no hydrothermal fluids influenced tonalite granite [ 35 ].…”

Section: Resultsmentioning

confidence: 99%

“…For comparison purposes, the 238 U, 232 Th, 40 K, radium equivalent (Ra eq ), absorbed dose rate (D R ), and AEDE of the present study with those reported in the literature are presented in Table 3 . In the Um Taghir area, [ 35 ] reported that the average activity (range) of the 238 U ( 226 Ra) series, 232 Th series, and 40 K were 15.7 (8.7–25.7), 13.2 (4.7–11.7), and 703.8 (195.1–1371.8) Bq/kg, respectively. In South Carolina, USA, Powell et al, (2007) reported that the average activity (range) of 238 U, 226 Ra, 232 Th, and 40 K were 21.4, 45.3, and 609 Bq/kg, respectively.…”

Section: Discussionmentioning

confidence: 99%

Assessing the Radiological Risks Associated with High Natural Radioactivity of Microgranitic Rocks: A Case Study in a Northeastern Desert of Egypt

Abed

Monsif

Zakaly

et al. 2022

IJERPH

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This study aimed to evaluate the radiological hazards of uranium (238U), thorium (232Th), and potassium (40K) in microgranitic rocks from the southeastern part of Wadi Baroud, a northeastern desert of Egypt. The activity concentrations of the measured radionuclides were determined by using a gamma-ray spectrometer (NaI-Tl-activated detector). The mean (238U), (232Th), and (40K) concentrations in the studied rocks were found to be 3680.3, 3635.2, and 822.76 Bq/kg, respectively. The contents in these rocks were elevated, reaching up to 6.3 wt%. This indicated the alkaline nature of these rocks. The high ratios of Th/U in the mineralized rocks could be related to late magmatic mineralization, suggesting the ascent of late magmatic fluids through weak planes such as faults and the contact of these rocks with older granites. The present data were higher than those of the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR) guideline limits. All the radiological hazard results indicated high human health risks. This confirmed that this area is not radiologically safe, and care must be taken when working in this area. This study showed that the area under investigation had high U content suitable for uranium extraction that could be used in the nuclear fuel cycle.

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“…In addition to medical exposure and cosmic radiation, the primary cause of exposure is construction materials comprising naturally occurring radionuclides. To determine the amount of public exposure, the study of environmental radioactivity in these materials is necessary even before people spend too much time (about 80 %) indoors while 20 % outdoors [5]. Construction materials and decorative elements illustrate the geology of their place of origin and thus comprise a limited quantity of radioactive materials that occur naturally, generally from the 238 U and 232 Th chains and 40 K [6] radionuclides.…”

Section: Introductionmentioning

confidence: 99%

Assessment of natural radioactivity and its radiological hazard in some decorative materials in Iraq

Jassim¹,

Abojassim²

2022

Nucl. Phys. At. Energy

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Most buildings use decorative materials that are aesthetically pleasing, that may contain various amounts of radioactive elements. Thus, the human health of dwellers and workers is continuously exposed to ionizing radiation. Natural radioactivity (238U, 232Th, and 40K) is measured in decorative materials collected from different Iraqi local markets by utilizing a shielded high counting efficiency NaI(Tl) system. Some radiological hazard indexes in all samples were calculated. The results obtained showed that the maximum value of specific activity for 238U, 232Th, and 40K is in decorative stone and the minimum is measured in decorative alabaster. This study concluded that the natural radioactivity and radiological hazard in most samples of decorative materials were within the permissible limits by the United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR), the International Commission on Radiological Protection (ICRP), Organization for Economic Co-operation and Development (OECD), and other world reported. Therefore, most samples of decorative materials in the present study can be used without health risks according to radiation scope.

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An extended assessment of natural radioactivity in the sediments of the mid-region of the Egyptian Red Sea coast

Cited by 44 publications

References 44 publications

An In-Depth Examination of the Natural Radiation and Radioactive Dangers Associated with Regularly Used Medicinal Herbs

An In-Depth Examination of the Natural Radiation and Radioactive Dangers Associated with Regularly Used Medicinal Herbs

Assessing the Radiological Risks Associated with High Natural Radioactivity of Microgranitic Rocks: A Case Study in a Northeastern Desert of Egypt

Assessment of natural radioactivity and its radiological hazard in some decorative materials in Iraq

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