Natural Radioactivity Measurements and Radiological Hazards Evaluation for Some Egyptian Granites and Ceramic Tiles

Sidique, Essam; Hassan, Sedky H.A.; Dawoud, Mohammad Mahmoud

doi:10.3390/su142114611

Cited by 2 publications

(6 citation statements)

References 45 publications

(80 reference statements)

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“…The values of gamma indices (Iγ) and alpha indices (Iα) in sections 2.5.6 and 2.5.7 were computed and are presented in Table5. The computed value of Iγ in the present study is above unity in all soil and fertilizer samples, but to be safe for use it is expected to be less than a unit value(Sidique E., Hassan S. H. & Dawoud M. M., 2022; EL-AFANDY A. H., et. al., 2015; UNSCEAR, 2000).…”

mentioning

confidence: 53%

“…As for U-238 was specified through its progeny and . On the other hand, activity concentration of Th-232 was identified via its daughters 911.2,and 338.3 keV), and Pb-212 (238.6 keV) (Sidique E., Hassan S. H. & Dawoud M. M., 2022;Hazou E. et. al., 2021).…”

Section: Gamma Spectrometric Analysismentioning

confidence: 99%

“…where Nc,E is the net counted, Pγ,E the probability of emitted gamma radiation with energy E for the radioisotope of interest, εE is the detector absolute efficiency at energy E, t is counting time and Ms refers to the sample's mass (Sidique E., Hassan S. H. & Dawoud M. M., 2022;Sidique E, et. al., 2021).…”

Section: Activity Concentrations and Transfer Factors Estimationmentioning

confidence: 99%

“…H., . For the corresponding samples, the annual effective dose rate was computed from the absorbed dose rate using Equation ( 5), and accordingly, in Table 4, none of the values in the samples under investigation go beyond the exemption limit of 1mSv.y -1 for public (Sidique E., Hassan S. H. & Dawoud M. M., 2022), where the finding is reflecting it is safe for the public.…”

Section: Gamma Radiation Impact Estimationmentioning

confidence: 99%

“…Each sample was dried very well and fine powder was made using a crusher. The crushed samples were weighed and sealed in plastic cylindrical beakers (Marinelli beakers) for more than 4 weeks to guarantee access to the secular equilibrium between parent radioisotopes and daughters in the natural disintegration series (Hassan N. N. & Khoo K. S., 2014;Sidique E., Hassan S. H. & Dawoud M. M., 2022).…”

Section: Sample Collection and Preparationmentioning

confidence: 99%

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Activity Concentration of Natural Radionuclides in Agricultural Soil, Fertilizer, their Transfer to Some Commonly Used Cereal Types, and Associated Health Hazards, Holeta, Ethiopia

Geremew

2023

Preprint

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Purpose: In the current study, the concentrations of natural radionuclides in samples of agricultural soil, fertilizer and cereal types commonly used in Ethiopia were estimated. Besides, the transfer of natural radionuclides (U-238, Th-232, and K-40) from agricultural soil to identified cereal types were computed. Materials and Methods: Gamma-ray spectrometry coupled to HPGe detector was used for the estimation of activity concentrations in soil, fertilizer and identified cereal types. Normalized relations of measured activity values with constant paremeters, given by UNSCEAR and WHO were used to investigate the related radiological parameters and radiation indices. Results and Discussion: The average activity concentrations in samples of agricultural soil are 46.44±6.68 Bq.kg-1, 94.66±13.98 Bq.kg-1, and 368.88±51.76 Bq.kg-1 and in fertilizer samples 38.5±4.15 Bq.kg-1, 87.6±9.36 Bq.kg-1, and 334.0±35.58 Bq.kg-1 for U-238, Th-232, and K-40 respectively. In the same way, the activity concentrations of these radionuclides was measured in identified cereal types. The related radiological parameters and radiation indices in the samples of soil and fertilizer were figured and compared with the prescribed limits set by the concerned committees (UNSCEAR, WHO). Conclusions: According to this study, U-238 and Th-232 activity concentrations in samples of soil and fertilizer are above the prescribed limits, where activities in the fertilizer are additive to the soil and in K-40 is within the safety limit. The gamma radiation exposure from the soil samples and annual effective dose via ingestion of cereals can create a risk to the public, where other investigated indices are within the safety limit prescribed by UNSEAR and WHO reports.

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mentioning

confidence: 53%

Section: Gamma Spectrometric Analysismentioning

confidence: 99%

Section: Activity Concentrations and Transfer Factors Estimationmentioning

confidence: 99%

Section: Gamma Radiation Impact Estimationmentioning

confidence: 99%

Section: Sample Collection and Preparationmentioning

confidence: 99%

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Activity Concentration of Natural Radionuclides in Agricultural Soil, Fertilizer, their Transfer to Some Commonly Used Cereal Types, and Associated Health Hazards, Holeta, Ethiopia

Geremew

2023

Preprint

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Geochemical characteristics, hazards impact assessment and radiogenic heat production of the alkaline rocks

Sidique,

Elhaddad,

Sami

et al. 2024

Sci Rep

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This study primarily investigates the natural radioactivity level in alkaline rocks collected from the Wadi El-Dib ring complex (WDRC) in North Eastern Desert of Egypt, and assesses potential health risks associated with their use as decorative building materials. The work was accomplished using a high-purity germanium detector as well as ICP-MS and ICP-AES techniques. The WDRC composed essentially of trachyte, quartz syenite, granite and syenite. Geochemically, these rocks contain high SiO2 and alkalis with metaluminous to slightly peraluminous features. All rocks contain high concentrations of rare earth elements (∑REEs = 109–1075 ppm), with clear enrichment in light REEs compared to heavy REEs [(La/Yb)N = 8.3–25.3. Radiometrically, the concentrations of the natural radioisotopes (238U, 232Th, and 40K) in the studied rock types surpassed the worldwide average values assigned for building materials by UNSCEAR. This elevation of the radioisotope concentration values is due to the presence of supplement minerals such as monazite, zircon, allanite, and rutile. Granites exhibit the highest mean concentrations of 238U (av. 164.24 ± 14.76 Bq/kg) and 232Th (av. 214.37 ± 23.33 Bq/kg), while trachytes demonstrate the highest 40K (av. 1352.56 ± 65.56 Bq/kg) concentrations. In contrast, syenites exhibite the lowest mean concentrations for 238U (av. 54.51 ± 6.81 Bq/kg) and 232Th (av. 56.76 ± 6.25 Bq/kg), while quartz syenites display the lowest mean concentration of 40K (av. 1144.78 ± 96.19 Bq/kg). The radiogenic heat production (RHP) associated with U, Th, and K range between 1.41 to 9.33 μW/m3, exceeding the typical crustal mean value of 0.8 to 1.2 μW/m3. The radiological parameters and indices evaluating risks of the outdoor and indoor radiation doses due to the investigated rocks were assessed. The results indicated that these rocks meet globally accepted values and safety standards (approved by UNSCEAR, ICRP, and EC) for surface building materials, as well as they underscore the importance of adhering to safety protocols to safeguard workers from radiation exposure within the WDRC area. Ultimately, the data herein provide a valuable database for assessing the compatibility of geochemical data and natural radioactivity level in WDRC rocks. Additionally, it reveals that from the radiological perspective, the investigated rocks are considered safe for use as decorative construction materials.

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Natural Radioactivity Measurements and Radiological Hazards Evaluation for Some Egyptian Granites and Ceramic Tiles

Cited by 2 publications

References 45 publications

Activity Concentration of Natural Radionuclides in Agricultural Soil, Fertilizer, their Transfer to Some Commonly Used Cereal Types, and Associated Health Hazards, Holeta, Ethiopia

Activity Concentration of Natural Radionuclides in Agricultural Soil, Fertilizer, their Transfer to Some Commonly Used Cereal Types, and Associated Health Hazards, Holeta, Ethiopia

Geochemical characteristics, hazards impact assessment and radiogenic heat production of the alkaline rocks

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