Distribution of Radionuclides and Radiological Health Assessment in Seih-Sidri Area, Southwestern Sinai

Alharshan, Gharam A.; Kamar, Mohamed S.; Lasheen, El Saeed R.; Ene, Antoaneta; Uosif, M. A. M.; Awad, Hamdy A.; Issa, Shams A.M.; Zakaly, Hesham M.H.

doi:10.3390/ijerph191710717

Cited by 16 publications

(3 citation statements)

References 41 publications

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“…The presence of phosphate components that contain uranium is the leading cause of the radioactive Th the activity ranged from 7.00±0.3 in a sample coded by RP4 to 189±9.5 Bqkg -1 in a sample coded by RP9 with an average value of 125.82±6.29. Finally, the activity of 40 According to the worldwide average concentrations (35,35, and 400 Bqkg-1) for 226 Ra, 232 Th, and 40 K, respectively, which were reported by [40], our findings demonstrate that the samples' average value of 40 K under investigation is lower than the world average, while the average value of 226 Ra and 232 Th are higher than the world average concentrations [2,[41][42][43][44]. The variations in the activity concentration are associated with the methods by which the soils are concentrated as well as the radioactive distribution in the rocks from which they arise.…”

Section: 2activity Concentrations and Radiological Parameterssupporting

confidence: 68%

Assessing geochemical and natural radioactivity impacts of Hamadat phosphatic mine through radiological indices

et al. 2023

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The utilization of phosphorite deposits as an industrial resource is of paramount importance, and its sustainability largely depends on ensuring safe and responsible practices. This study aims to evaluate the suitability of phosphorite deposits for industrial applications such as the production of phosphoric acid and phosphatic fertilizers. To achieve this goal, the study meticulously examines the geochemical characteristics of the deposits, investigates the distribution of natural Radioactivity within them, and assesses the potential radiological risk associated with their use. The phosphorites are massive and collected from different beds within the Duwi Formation at the Hamadat mining area. They are grain-supported and composed of phosphatic pellets, bioclasts (bones), non-phosphatic minerals, and cement. Geochemically, phosphorites contain high concentrations of P2O5 (23.59–28.36 wt.%) and CaO (40.85–44.35 wt.%), with low amounts of Al2O3 (0.23–0.51 wt.%), TiO2 (0.01–0.03 wt.%), Fe2O3 (1.14–2.28 wt.%), Na2O (0.37–1.19 wt.%), K2O (0.03–0.12 wt.%), and MnO (0.08–0.18 wt.%), suggesting the low contribution of the detrital material during their deposition. Moreover, they belong to contain enhanced U concentration (55–128 ppm). They are also enriched with Sr, Ba, Cr, V, and Zn and depleted in Th, Zr, and Rb, which strongly supports the low detrital input during the formation of the Hamadat phosphorites. The high Radioactivity of the studied phosphorites is probably due to the widespread occurrence of phosphatic components (e.g., apatite) that accommodate U in high concentrations. Gamma spectrometry based on NaI (Tl) crystal 3×3 has been used to measure occurring radionuclides in the phosphorite samples. The results indicate that the radioactive concentrations’ average values of 226Ra, 232Th, and 40K are 184.18±9.19, 125.82±6.29, and 63.82±3.19 Bq Kg-1, respectively. Additionally, evaluations have been made of the radiological hazards. The calculated risk indicators exceeded the recommended national and world averages. The data obtained will serve as a reference for follow-up studies to evaluate the effectiveness of the Radioactivity of phosphatic materials collected from the Hamdat mine area.

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Section: 2activity Concentrations and Radiological Parameterssupporting

confidence: 68%

Assessing geochemical and natural radioactivity impacts of Hamadat phosphatic mine through radiological indices

et al. 2023

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“…Among the estimated mean 238 U and 232 Th, and 226 Ra activity concentrations of the studied beryl-bearing rocks, Homret Mukpid (79, 87.15, 60.26 Bq kg −1 ) and Homret Akarem (111.6, 51.17, 85.1 Bq kg −1 ) contain the highest values, which are higher than the safety world levels 40 . This is may be attributed to their highly fractionated granitic rocks that host uranium and thorium reservoir minerals such as zircon, allanite, and monazite 16 , 19 , 21 . The 238 U and 232 Th activity concentrations of the examined Homret Mukpid and Homret Akarem are also higher than those of Homrit Waggat Area 16 .…”

Section: Resultsmentioning

confidence: 99%

“…These radionuclides are abundant within crustal rocks certainly the highly evolved granitic rocks and pegmatites. Many diseases may be produced from long time exposure and inhalation of radon gas, which is the product of radium such as acute leucopenia and bone cancers 16 , 19 – 21 .…”

Section: Introductionmentioning

confidence: 99%

Assessing environmental and radiological impacts and lithological mapping of beryl-bearing rocks in Egypt using high-resolution sentinel-2 remote sensing images

Khaleal,

El-Bialy,

Saleh

et al. 2023

Sci Rep

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Emerald and other beryls represent a family of the most valuable gemstone around the world and particularly in Egypt. Beryllium (Be) contents in beryl-bearing bedrocks in south Sinai (Wadi Ghazala and Wadi Sedri), and in central and south Eastern Desert of Egypt (Igla area, Zabara-Um Addebaa belt, Homret Akarem, and Homret Mukpid) were investigated in this study. The environmental risk levels of Be, associated major ions, and heavy metals in groundwater nearby to beryl-bearing mineralization were also evaluated. Results showed that Be contents ranged from 1 to 374 ppm in beryl-bearing bedrocks, while in nearby groundwater, Be content has a range of 0.0001–0.00044 mg/L with an average of 0.00032 mg/L, which is within the permissible levels and below (0.004) the U.S. EPA maximum contaminant level (MCL). Most levels of heavy metals (e.g., Be, B, Ni, V, Fe, and Al) in the investigated groundwater of central and south Eastern Desert and south Sinai are within the permissible levels and below their corresponding U.S. EPA MCLs. This study also investigated the radiological risk of natural radionuclides distributed in beryl-bearing bedrocks in the study area using gamma spectrometry; Sodium Iodide [NaI(Tl)] scintillation detector. Among the estimated mean 238U, 232Th, and 226Ra activity concentrations of the studied beryl-bearing rocks, Homret Mukpid (79, 87.15, 60.26 Bq kg−1) and Homret Akarem (111.6, 51.17, 85.1 Bq kg−1) contain the highest values. This may be attributed to their highly fractionated granitic rocks that host uranium and thorium reservoir minerals such as zircon, allanite, and monazite. The estimated data of multi-radiological parameters such as absorbed gamma dose, outdoor and indoor annual effective dose, radium equivalent activity, internal and external indices, index of excess cancer, and effective dose to human organs reflecting no significant impacts from the emitted natural gamma radiation.

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Thermal and physico-mechanical evaluation of some magmatic rocks at Homrit Waggat Area, Eastern Desert, Egypt: petrography and geochemistry

Rashwan

Lasheen

Azer

2023

Bull Eng Geol Environ

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Egypt is characterized by a wide variety of granitic rocks, making it one of the most essential ten countries producing ornamental stones worldwide. The main objective of this article is to study the effect of the chemical and mineralogical variations of the granitic rocks on their thermal expansion behaviors and physico-mechanical properties for use as dimension stones. The assessment of these rocks was performed using two main parameters: the first dealt with the petrographic investigation and chemical analysis for mineralogical and geochemical characterization. The second dealt with some essential physical and mechanical properties (e.g., water absorption, bulk density, and apparent porosity, and compressive strength), and thermal behavior in terms of linear thermal expansion coefficient. Based on the petrographic description, the samples were classified into five types: syenogranite, alkali-feldspar granite, albitized granite, granodiorite, and tonalite. The mineralogical characterization exhibited variable proportions of quartz and feldspars (plagioclase and alkali-feldspar), in addition to accessory minerals such as titanite, zircon, rutile, and iron oxide-based minerals. The thermal investigation showed insignificant changes in the thermal coefficient values and the thermal strain up to 100 °C as it did not exceed 0.049%, which indicates that they can be installed in places of high-temperature conditions. The physico-mechanical properties revealed that the water absorption ranged from 0.14 to 0.52%, the bulk density ranged from 2590.42 to 2748.23 kg/m3, and the compressive strength ranged from 314.17 to 628.75 kg/cm2. These results indicate that the studied granites could be acceptable for interior (indoor) and light-duty exterior purposes such as building cladding.

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Distribution of Radionuclides and Radiological Health Assessment in Seih-Sidri Area, Southwestern Sinai

Cited by 16 publications

References 41 publications

Assessing geochemical and natural radioactivity impacts of Hamadat phosphatic mine through radiological indices

Assessing geochemical and natural radioactivity impacts of Hamadat phosphatic mine through radiological indices

Assessing environmental and radiological impacts and lithological mapping of beryl-bearing rocks in Egypt using high-resolution sentinel-2 remote sensing images

Thermal and physico-mechanical evaluation of some magmatic rocks at Homrit Waggat Area, Eastern Desert, Egypt: petrography and geochemistry

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