Assessment of radiation hazards due to exposure to radionuclides in marble and ceramic commonly used as decorative building materials in Egypt

Hassan, Nabil M.; Mansour, Nabil; Fayez-Hassan, M.; Fares, S.

doi:10.1177/1420326x15606507

Cited by 24 publications

(13 citation statements)

References 22 publications

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“…marble and ceramic were below the world average value, where the potassium was higher than the standard limit. 70 The activity level of thorium was found to be higher than radium, which may be due to the abundance of thorium being greater than radium in the soil of Malaysia which is presented in Table 1.…”

Section: Resultsmentioning

confidence: 95%

Radiological risks assessment of building materials ingredients: Palm oil clinker and fuel ash

Karim

Khandaker

Asaduzzaman

et al. 2018

Indoor and Built Environment

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Technical benefits relevant to the use of palm oil clinker (POC) and fuel ash (POFA) in building materials has been well documented. However, the radiological health hazards caused by the incorporation of POC and POFA as an ingredient of building materials have not been studied so far. The radioactivity levels were measured by γ-ray spectrometry using hyper-pure germanium (HPGe) detector. The activity concentration of 226Ra and 232Th in POC and POFA was found to be in the ranges of 5.56 ± 0.23 to 9.03 ± 0.21 and 4.21 ± 0.03 to 7.98 ± 0.19 Bq kg−1, respectively, and these values were lower than the world average values of 50 Bq kg−1 for building materials. The 40K value was within the range of 413.01 ± 1.78 to 604.66 ± 2.18 Bq kg−1. Several radiological parameters and hazard indices, i.e. radium equivalent activity, absorbed dose rate and annual effective dose etc. were calculated for the evaluation of the potential radiological hazards. The obtained values fall within the recommended limit set by various international organizations. Since the activity levels of 226Ra, 232Th and 40K in POC and POFA were significantly lower than the corresponding literature data for other ingredients of building materials, it indicates that POC and POFA are safe to be used in concrete construction.

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Section: Resultsmentioning

confidence: 95%

Radiological risks assessment of building materials ingredients: Palm oil clinker and fuel ash

Karim

Khandaker

Asaduzzaman

et al. 2018

Indoor and Built Environment

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“…The prepared samples were packed into airtight plastic cylindrical containers (6 cm diameter and 4 cm height) made from polyethylene. The containers were carefully sealed with an adhesive to prevent any possibility of radon ( 222 Rn) or thoron ( 220 Rn) escaping and stored for one month to achieve radioactive secular equilibrium between radium and radon 14 . At the same time, an empty container, with the same geometry as used for the samples, was also sealed and left for the same time in order to be used for background measurement.…”

Section: Experimental Techniquementioning

confidence: 99%

“…The potassium ( 40 K) specific activity concentration was estimated from the γ-ray’s energy of 1460.9 keV (10.67%) associated with the decay of 40 K. The specific activity concentration of these natural radionuclides, A , (Bq kg −1 ) was calculated from Eq. (1) 14,18 .where C is the net count above the background, p is the absolute emission probability of the gamma ray (mentioned in brackets after γ-rays energies), w is the net dry sample weight (kg), t is the measurement time which was adjusted for all measurements to be 80000 seconds, and ε is the absolute efficiency of the detector.…”

Section: Experimental Techniquementioning

confidence: 99%

Comparative study of precise measurements of natural radionuclides and radiation dose using in-situ and laboratory γ-ray spectroscopy techniques

Hassan

Kim

Jang

et al. 2018

Sci Rep

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In this study, in-situ and laboratory γ-ray spectroscopy techniques were compared to evaluate the activity concentration of natural radionuclides in soil. The activity concentrations of U (Ra), Th, andK in the soil in 11 sites were simultaneously measured with in-situ portable HPGe and the NaI(Tl) detectors. In parallel, 55 soil samples collected from these sites were analyzed with a laboratory γ-ray spectroscopy technique (HPGe). A strong correlation was observed between the in-situ and laboratory HPGe techniques with a linear correlation coefficient (R) of 0.99 for Ra andTh and 0.975 for K, respectively. The in-situ HPGe technique shows a strong correlation with the NaI(Tl) detector. γ-Rays cps ofRa, Th, andK of the NaI (Tl) detector were then converted to specific activities (Bq kg unit) in soil using the empirical formulas obtained in this study. The absorbed dose rate in air at 1 m height above ground due to these radionuclides was calculated using the Beck's formula and the results were compared with measured values obtained with an high pressure ionization chamber. The results of the calculated and measured dose rate show a strong correlation of R = 0.96. The reliability and precision of analytical spectroscopy techniques of radioactivity and radiation dose were confirmed in this work.

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“…The soil (upper layer of the earth's crust) is one of the most important sources of naturally occurring radioactive materials (NORM), i.e. uranium series, thorium series and potassium [1][2][3][4]. UNSCEAR, 2000 [5] reported that the main contributor of human beings' exposure comes from natural radiation, and the worldwide average annual effective dose is 2.4 mSv.…”

Section: Introductionmentioning

confidence: 99%

Estimation of Radiation Hazards of Natural Radionuclides in Archaeological Site (Tanis), Egypt

Salama¹,

Mansour

Hassan

2019

Arab Journal of Nuclear Sciences and Applications

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Natural radionuclides of 238 U ( 226 Ra), 232 Th and 40 K contained in the earth crust (soil) of Archaeological Site (Tanis, San Al-Hagar, Sharqai, Egypt) were measured using γ-ray spectroscopy system equipped with High pure germanium detector (HPGe). 20 soil samples were collected from the ground surface of tomb rooms, roads among tombs and the outer empty space of Tanis. Arithmetic mean values of radionuclides concentrations in the studied samples were 5.96 ± 1.46 Bq kg -1 for 226 Ra, 3.78 ± 1.60 Bq kg -1 for 232 Th and 70.34 ± 7.20 Bq kg -1 for 40 K, respectively. All the studied natural radionuclides had concentration values less than worldwide recommended value of 35, 30, 400 Bq kg -1 for 226 Ra, 232 Th and 40 K, respectively. Furthermore, the radiation dose in that site was measured using Digilert100 radiation survey meter and its mean value was of 0.52 ± 0.13 μSv h -1 which is much lower than safety limit. Moreover, radiological hazards indices of radium equivalent activity (Ra eq ), external (H ex ) and internal hazard indices (H in ), alpha and gamma radiation indices and annual effective dose due to the presence of those radionuclides were calculated and their values were less than worldwide limit. These results implied that the Tourists can safely visit and stay in this site (San Al-Hagar) as long as they wish.

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Assessment of radiation hazards due to exposure to radionuclides in marble and ceramic commonly used as decorative building materials in Egypt

Abstract: The concentrations of 238 U (226 Ra), 232 Th, and 40 K for the commonly used decorative building materials (15 marble and 15 ceramic) in Egypt were measured using gamma spectroscopy system. Radionuclides concentrations in marble samples were ranged from:

Cited by 24 publications

References 22 publications

Radiological risks assessment of building materials ingredients: Palm oil clinker and fuel ash

Radiological risks assessment of building materials ingredients: Palm oil clinker and fuel ash

Comparative study of precise measurements of natural radionuclides and radiation dose using in-situ and laboratory γ-ray spectroscopy techniques

Estimation of Radiation Hazards of Natural Radionuclides in Archaeological Site (Tanis), Egypt

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