Natural radioactivity in Algerian building materials
Samples of natural and made building materials collected from port are analysed for 226Ra, 232Th and 40K employing a high-resolution HPGe γ-spectrometry system. the particular concentrations for 226Ra, 232Th and 40K, from the chosen building materials, ranged from (12–65 Bq kg−1), (7–51 Bq kg−1) and (36–675 Bq kg−1), severally. The measured activity concentrations for these natural radionuclides were compared with the reported information of alternative countries and with the planet average activity of soil. Radium-equivalent activities were calculated for the measured samples to assess the radiation hazards arising from mistreatment those materials within the construction of dwellings. [1]
Natural radioactivity of Australian building materials, industrial wastes and by-products.
The natural radiation thanks to the presence of 226Ra, 232Th and 40K in standard raw materials and a few solid industrial wastes and by-products that ar being employed or have a possible to be used within the building and ceramic industries in Australia has been measured by gamma-ray spectroscopy. the bulk of materials examined during this work showed fairly low levels of radiation. Some samples of red mud, phosphogypsum, mineral merchandise and ash did show higher levels of radiation than would be acceptable on the idea of a criterion formula for gamma-ray activity advised to be used in some OECD countries. however this higher level of radiation mustn’t create associate degree environmental pathological state once these materials represent a comparatively little portion of the materials utilized in a traditional building. [2]
Natural radioactivity and human mitochondrial DNA mutations
Radioactivity is understood to induce tumors, body lesions, and minisatellite length mutations, however its effects on the polymer sequence haven’t antecedently been studied. A coastal terra firma in Kerala (India) contains the world’s highest level of natural radiation during a densely geographic region, giving a chance to characterize radiation-associated polymer mutations. we have a tendency to sampled 248 pedigrees (988 individuals) within the high-radiation terra firma and in near low-radiation islands as an effect population. we have a tendency to sequenced their mtDNA, and located that the pedigrees living within the high-radiation space have considerably (P < zero.01) accumulated germ-line purpose mutations between mothers and their offspring. [3]
Investigation of natural environmental radioactivity concentration in soil of coastaline area of Ado-Odo/Ota Nigeria and its radiological implications
Natural emission in coastaline space soil of Ado-Odo/Ota has been administrated to determine the presence of radionuclides exploitation gamma-ray spectrometry (HPGe detector). The result showed that U-238, Th-232 and K-40 ranged from 24 ± 7–49 ± 10; 67 ± 6–120 ± 9 and 88 ± 17–139 ± 20 Bqkg−1 severally. The metallic element equivalent for the samples ranged from 132.51 to 230.91 Bqkg−1 with norm of 185.89 Bqkg−1. The norm for the gamma rate for the soil samples was calculable to be eighty one.32 nGyh−1. The calculable values of annual effective dose equivalent ranged from zero.61 to 1.07 mSv y−1. The estimation of alpha index representative (Iα) ranged from zero.12 to 0.24 with norm of zero.21 whereas the gamma representative index ranged between zero.465 and 0.810. [4]
Natural Radioactivity Levels and Radiological Risk Assessment of Surface Water from Coastal Communities of Ndokwa East, Delta State, Nigeria
Aims: The aim of this study is to live the natural radiation levels in surface water from coastal communities so as to assess the imaging health hazards related to the utilization of such water.
Study Design: This study was strictly associate experimental work.
Place and period of Study: Abalagada, Agwe-Etiti, Asemuku, Aboh and Okpai coastal communities of Ndokwa –East, Nigeria: between Gregorian calendar month – Dec, 2016.
Methodology: twenty samples of surface water were collected from 5 coastal communities with pre-washed a pair of.0 l plastic bottles. The bottles were rinsed with the water before assortment and acidified at once once assortment with few drops of HCL. The bottles were sealed tightly with vinyl tapes and unbroken within the laboratory for four weeks for laic equilibrium of the radionuclides. The activity concentration of the radionuclides were measured exploitation iodide detector. [5]
Reference
[1] Amrani, D. and Tahtat, M., 2001. Natural radioactivity in Algerian building materials. Applied Radiation and Isotopes, 54(4), (Web Link)
[2] Beretka, J. and Matthew, P.J., 1985. Natural radioactivity of Australian building materials, industrial wastes and by-products. Health physics, 48(1), (Web Link)
[3] Forster, L., Forster, P., Lutz-Bonengel, S., Willkomm, H. and Brinkmann, B., 2002. Natural radioactivity and human mitochondrial DNA mutations. Proceedings of the National Academy of Sciences, 99(21), (Web Link)
[4] Investigation of natural environmental radioactivity concentration in soil of coastaline area of Ado-Odo/Ota Nigeria and its radiological implications
E. S. Joel, O. Maxwell, O. O. Adewoyin, O. C. Olawole, T. E. Arijaje, Z. Embong & M. A. Saeed
Scientific Reports volume 9, (Web Link)
[5] P. Ononugbo, C. and D. Anyalebechi, C. (2017) “Natural Radioactivity Levels and Radiological Risk Assessment of Surface Water from Coastal Communities of Ndokwa East, Delta State, Nigeria”, Physical Science International Journal, 14(1), (Web Link)
