Radionuclides measurements and mineralogical studies on beach sands, East Rosetta Estuary, Egypt

Wahab, M. Abd El; Nahas, H. A. El

doi:10.1007/s11631-013-0617-3

Cited by 6 publications

(2 citation statements)

References 16 publications

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“…The outdoor absorbed gamma dose rate (D out ) at 1 meter above the ground surface due to uniformly distributed natural radionuclides can be calculated as follows 29,30 : …”

Section: Methodsmentioning

confidence: 99%

Radiological Investigation of High Background Radiation Areas

Mubarak

Fayez-Hassan

Mansour

et al. 2017

Sci Rep

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In this paper, we used the Hyper-Pure Germanium (HPGe) detector to measure 30 samples which are collected from north of Nile Delta near Rosetta beach in Egypt. The activity of primordial radionuclides, such as 238U, 235U, 232Th, and 40K was estimated. Concentrations ranged between 36.5–177.4, 50–397.5 and 56.1–168.9 Bq.kg−1 for 238U, 232Th and 40K respectively. Activity concentration of 235U and the variation in uranium isotopic ratio 235U/238U was calculated. External hazard indices (Hex) (or radium equivalent activity Raeq), activity concentration indices (I), alpha index (Iα), absorbed outdoor gamma dose rate (Dout), effective outdoor gamma dose rate (Eout) and Excess Lifetime Cancer Risk (ELCR) due to different samples are estimated. External hazard indices (Hex) are ranged between 0.32–2.04, radium equivalent activity (Raeq) are ranged between 118.67–753.91, the activity concentration indices (I) are 0.42–2.61, and alpha index (Iα) are 0.18–0.89. External hazard indices (Hex) in some samples more than unity then it exceeds the upper limit of exposure. Also, the radium equivalent activities (Raeq) are higher than the exemption limits (370 Bq.kg−1).

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“…The outdoor absorbed gamma dose rate (D out ) at 1 meter above the ground surface due to uniformly distributed natural radionuclides can be calculated as follows 29,30 : …”

Section: Methodsmentioning

confidence: 99%

Radiological Investigation of High Background Radiation Areas

Mubarak

Fayez-Hassan

Mansour

et al. 2017

Sci Rep

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“…The Rashid area in Egypt is an area of high abundance black sand ‐ monazite minerals. [ 3 ] The current study aims to identify the radioisotopes types and activity, mineralization and radiological potential hazard of black‐sand ores of Rashid coast, Egypt, using gamma‐ray spectrometer based on HPGe and Scanning Electron Microscope (SEM) Technique, binocular and polarizing microscopes. Uncertainty calculations of efficiency and activity are also objectives.…”

Section: Introductionmentioning

confidence: 99%

Radioactivity and Risk Assessment with Uncertainty Treatment for Analysis of Black Sand Minerals

Abdel‐Rahman

Sabry

Khattab

et al. 2020

Zeitschrift anorg allge chemie

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Precise radiological analysis of environmental, ores, nuclear materials and minerals samples is of great value for monitoring and surveillance objectives. The information deduced from the analysis can be used to identify the origin and nature of the accompanied activities. This work focuses on analysis of some black sand ore samples to identify and quantify their radioisotopes and potential risk. The analysis can provide useful information about the environmental transport mechanism and about the sources of radionuclides in the studied area; Rashid city coast, Egypt. To achieve this target, a Non‐destructive gamma spectrometer (NDGS) was used to trace and amount the radioisotopes types and activities. The efficiency was calculated with uncertainty treatment. The specific activity with uncertainty assessment of 238U, 232Th decay series and 40K of these samples were varied from 72.2 to 252.4 with average value 111 ± 25 Bq·kg–1, 94.2 to 579.8 with average value 140 ± 22 Bq·kg–1 and 427.9 to 527.5 with average value 475 ± 36 Bq·kg–1 respectively. The mineralogical signature of the analyzed samples (XRD) indicates that the samples are mainly composed of ilmenite, zircon, rutile, sphene and monazite. The potential risk assay shows that the hazard parameters of these samples; the Absorbed Gamma Dose Rate (AGDR), Gamma Activity Index (Iγ), Annual Effective Dose Rate Equivalent (AEDRE), Radium equivalent, External and Internal Hazard Index (Hex and Hin) are of specific characteristics. The total absorbed gamma dose rate and the annual effective dose due these samples were found to be with average values 158 ± 24 (nGy/h) and 195 ± 29 (μSv/y) which are higher than the world average value of 59 nGy/h and 70 μSv/y respectively. The results obtained are important to establish baseline levels to detect any upcoming changes due to any activities. It can be observed that the studied area has elevated thorium and uranium content. The relatively high dose rate will be considered as a spa for the physical therapy such as treatment of some skin diseases and rheumatoid.

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