Natural radionuclides and hazards of rock samples collected from Southeastern Nigeria

Joshua, E. O.; Ademola, Janet Ayobami; Akpanowo, Mbet Amos; Oyebanjo, O. A.; Olorode, D. O.

doi:10.1016/j.radmeas.2009.04.002

Cited by 42 publications

(16 citation statements)

References 13 publications

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“…It is really of importance to understand better the risk accompanied with the exposure of a population to the radiations emitted from building materials (Joshua, Ademola, Akpanowo, Oyebanjo, & Olorode, 2009). This exposure occurs on a daily basis and the ability of the radionuclides to move rapidly in air allows them to be easily transmitted into the environment in which humans come in contact with (Gupta, & Chauhan, 2009).…”

Section: Introductionmentioning

confidence: 99%

Radiation exposure to dwellers due to naturally occurring radionuclides found in selected commercial building materials sold in Nigeria

Maxwell

Adewoyin

Ehi-Eromosele

et al. 2018

Journal of Radiation Research and Applied Sciences

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a b s t r a c tThe activity concentration of 226 Ra, 232 Th and 40 K was measured in commonly building materials used in Nigeria from commercial supplier using High Purity Germanium Gamma (HPGe) detector. The mean activity concentrations in the samples were found to be 51.5 ± 9.3, 72.46 ± 17.65 and 217.05 ± 44.31 Bqkg À1 for 226 Ra, 232 Th and 40 K respectively. The highest radium equivalent (Ra eq ) of 273.9 Bqkg À1 was noted in Perfect Superfix White Cement (Nigeria) but found to be < 370 Bqkg À1 as the recommended dose limiting safe value for bulk media as presumed, the highest value of internal hazard index (H in ) and external hazard index (H ex ) of 0.894 and 0.744 respectively were also < 1. The absorbed dose rate (DR) with a value of 122.52 nGyh À1 noted in ceramic tile sample is higher than the weighted population world average value of 80 nGyh À1 by a factor of 1.53. The highest annual effective dose rate (AEDR) of 0.601 mSvy À1 reported in PNT ceramics but was found to be less < 1 mSvy À1 . The investigated materials have the values of H in , H ex and AEDR greater than 0.5 but less than1, showing that the dose impact exceeds the exemption dose level of 0.3 mSvy À1 for AEDR but complies to the upper limit of dose principle of 1 mSvy À1 .

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Section: Introductionmentioning

confidence: 99%

Radiation exposure to dwellers due to naturally occurring radionuclides found in selected commercial building materials sold in Nigeria

Maxwell

Adewoyin

Ehi-Eromosele

et al. 2018

Journal of Radiation Research and Applied Sciences

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“…It is really of importance to understand better the risk accompanied with the exposure of a population to the radiations emitted from building materials (1) . This exposure occurs on a daily basis and the ability of some radionuclides to move rapidly in air allows them to be easily transported into or within the environment in which humans come in contact with (2) .…”

Section: Introductionmentioning

confidence: 99%

A Study of Natural Radioactivity in Some Building Materials in Nigeria

Maxwell

Olusegun

Cyril

et al. 2018

Radiation Protection Dosimetry

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Building materials of different brands were assessed for the concentrations of 226Ra, 232Th and 40K using HPGe detector. The activity concentrations in the measured samples ranged from 27 ± 8 to 82 ± 8 Bq kg-1 for 226Ra, 41 ± 4 to 101 ± 8 Bq kg-1 for 232Th and 140 ± 8 to 940 ± 19 Bq kg-1 for 40K, respectively. The Radium equivalent (Raeq) activity from the samples was found to be <370 Bq kg-1 as the recommended value for construction materials. This study will set a baseline data for significant standards on radiation exposure of the measured radionuclides in the selected building materials used in Nigeria.

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“…The members of the radioactive decay chain of 232 Th (14%), 235 U and 238 U (55.8%) along with 40 K (13.8%) are responsible for doses from natural radiation. The ratio of 235 U to 238 U is less than 1% hence the contribution of 235 U to the environmental dose is very small (Joshua et al, 2009;Bennett, 1997;Bruzzi et al, 1997;UNSCEAR, 1993). These primordial radionuclides have sufficiently longer half-lives and decay to attain the stable state emitting ionizing radiations.…”

Section: Introductionmentioning

confidence: 99%

High background radiation investigated by gamma spectrometry of the soil in the southwestern region of Cameroon

Abiama

Ateba

Ben-Bolie

et al. 2010

Journal of Environmental Radioactivity

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Natural radionuclides and hazards of rock samples collected from Southeastern Nigeria

Cited by 42 publications

References 13 publications

Radiation exposure to dwellers due to naturally occurring radionuclides found in selected commercial building materials sold in Nigeria

Radiation exposure to dwellers due to naturally occurring radionuclides found in selected commercial building materials sold in Nigeria

A Study of Natural Radioactivity in Some Building Materials in Nigeria

High background radiation investigated by gamma spectrometry of the soil in the southwestern region of Cameroon

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