Radioactivity dosage evaluation of Brazilian ornamental granitic rocks based on chemical data, with mineralogical and lithological characterization

Salas, Humberto; Nalini, Hermínio Árias; Mendes, Júlio Cézar

doi:10.1007/s00254-005-0066-3

Cited by 13 publications

(20 citation statements)

References 6 publications

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“…Generally, except for the weathered granite, the activity of 40 K in the investigated rocks was lower than that measured in similar rocks of the Izera Block (Western Sudetes) [ 12 , 13 ]. Granite from Kamienna Góra (sample 1) is also characterized by lower 40 K activity than in granites from the Bohemian Massif [ 14 ], Brazil [ 15 , 16 ], Caucasus [ 17 ], Egypt [ 18 ], Yemen [ 19 ] and Chinese commercial granites [ 20 ]. The rock samples from the Kestanbol granitic plutons from the Ezine region [ 21 ] and from the Kaymaz and Sivrihisar plutons [ 22 ] located in Turkey show the higher average activity concentrations as well.…”

Section: Resultsmentioning

confidence: 99%

Natural radioactivity in granites and gneisses of the Opava Mountains (Poland): a comparison between laboratory and in situ measurements

Dżaluk

Malczewski

Żaba

et al. 2018

J Radioanal Nucl Chem

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The natural radioactivities of five characteristic igneous rocks of the eastern foreland of the Opava Mountains (Eastern Sudetes, Poland), obtained in the laboratory and under in situ conditions, are presented. The activity concentrations of 232Th, 238U, and 40K were measured using an HPGe gamma-ray spectrometry system. The ranges of the activity concentrations of 232Th were 7–71 Bq kg−1 in the laboratory and 6–68 Bq kg−1 for the in situ measurements. For 238U, the ranges of the activity concentrations were 5–52 Bq kg−1 in the laboratory and 9–48 Bq kg−1 for the in situ measurements, and for 40K, the ranges were 520–1560 Bq kg−1 in the laboratory and 537–1700 Bq kg−1 for the in situ measurements. These determined activity concentrations were compared with the average activity concentrations of the radionuclides in similar types of rocks and with data from the Sudetes available in the literature. No significant differences were found between the in situ and laboratory measurements.

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Section: Resultsmentioning

confidence: 99%

Natural radioactivity in granites and gneisses of the Opava Mountains (Poland): a comparison between laboratory and in situ measurements

Dżaluk

Malczewski

Żaba

et al. 2018

J Radioanal Nucl Chem

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“…The most serious involve increased probability of cancer and birth defects (Faisal et al, 2014). Most household cooking dishes manufactured from clay, ceramic, and stone contain various concentrations of the natural radionuclides 226 Ra,232 Th and 40 K. The precise concentrations depend on the chemical composition of the material, which is related to the geological conditions and geophysical characteristics of their origin (Salas et al, 2006). The materials may contain radionuclides from both natural sources and waste products in addition to some minerals from certain slags.…”

Section: Introductionmentioning

confidence: 99%

Natural radioactivity level of clay, ceramic, and stone cooking dishes in Saudi Arabia

Alharbi¹

2016

Int. J. Phys. Sci.

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Standards and guidelines are needed in the manufacture of household cooking dishes from clay, ceramic, and stone in Saudi Arabia. The radioactivity levels due to the presence of 40 K, 232 Th, and 226 Ra in these materials were determined using gamma spectrometry equipped with high purity germanium (HPGe) detector. The activity concentrations of 226 Ra ranged from 5.75 Bq kg −1 (Yemen stone sample) to 192.35 Bq kg −1 (China ceramic sample), those of 232 Th ranged from 6.17 Bq kg −1 (Yemen stone sample) to 192.41 Bq kg −1 (China ceramic sample), and those of 40 K ranged from 43.92 Bq kg −1 (clay sample manufactured in Bahrah, Saudi Arabia) to 656.96 Bq kg −1 (ceramic sample from Romania). Radiological indices were measured for all samples to ascertain the potential radiation health hazards. The average concentrations for 226 Ra and 232 Th and the absorbed dose rate (D R) in clay and ceramic dishes exceeded the permissible global limits, with the exception of clay samples from Makkah, Saudi Arabia. The 226 Ra and 232 Th concentrations in all cooking dishes manufactured from stone were within safety limits. However, most of the average values obtained for the activity concentration of 40 K exceeded the recommended limit. The radium equivalent (Ra eq), annual gonadal dose equivalent (AEDE), external hazard index (H ex) , and gamma activity index (I γ) were found to be below the internationally accepted safe limit, except in a ceramic sample imported from China. The sample also had an annual effective dose (AEDE) that slightly above unity. The concentrations of a total of 33 chemical elements were estimated by using an ARL QUANT'X energy-dispersive X-ray fluorescence spectrometer. In most samples, the elements' concentrations exceeded the reference level values. In conclusion, care must be taken when using cooking dishes manufactured from clay, ceramic, and stone.

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“…In case of internal alpha radiation exposure the following formula has been applied, taking into consideration that a building material with The index factors estimated above, correspond to a standard room with massive granitic walls and could be applied more to workers in a well-ventilated granite mine than inhabitants. For the estimation of the actual dose received annually indoors, due to granite tiles usage, a more realistic case has to be considered where granite tiles with ~2 cm in thickness cover only the floor of the standard room (Anjos et al, 2005(Anjos et al, , 2011Salas et al, 2006;Mao et al, 2006). In this case, the absorbed gamma dose rate (Da, nGy.h -1 ), denoted as the energy transfer rate by ionizing radiation absorbed per unit mass of the tissue, due to granite floor could be calculated as:…”

Section: Radiation Indices and Dose Estimationsmentioning

confidence: 99%

Natural Radioactivity of Western Anatolian Plutons, Turkey

Papadopoulos¹,

Altunkaynak²,

Koroneos³

et al. 2017

geosociety

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Radioactivity dosage evaluation of Brazilian ornamental granitic rocks based on chemical data, with mineralogical and lithological characterization

Cited by 13 publications

References 6 publications

Natural radioactivity in granites and gneisses of the Opava Mountains (Poland): a comparison between laboratory and in situ measurements

Natural radioactivity in granites and gneisses of the Opava Mountains (Poland): a comparison between laboratory and in situ measurements

Natural radioactivity level of clay, ceramic, and stone cooking dishes in Saudi Arabia

Natural Radioactivity of Western Anatolian Plutons, Turkey

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