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Activity size distribution of some natural radionuclides
Radiation Protection Dosimetry, 2013In this study, the results concerning the activity size distribution of the long-lived ((210)Pb) radon decay product aerosols and the thoron decay product aerosols ((212)Pb) and ((7)Be) of the outdoor atmosphere are presented. Also, the mass size distribution of the aerosol particles is determined.
M, Mohery +3 more
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Natural radionuclides in electronic waste: an initial approach
Environmental Technology, 2017Some radionuclides are present in trace amount in the raw material of electronic devices that suffer obsolescence and are improperly disposed of. Obsolete personal computers become electronic waste and may contain potential environmental contaminants. Furthermore, there may be an additional concern: the ionizing radiation emission.
Arykerne Nascimento Casado, da Silva +4 more
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Environmental effects of radionuclides - observations on natural ecosystems
Journal of Radiological Protection, 2000To better quantify risk to non-human species from exposure to environmental radioactivity, understanding of the behaviour of radionuclides in the biosphere needs to be increased. This study outlines current thinking on ecological risk assessment (ERA) methodology and applies the indicator species or critical groups approach to biota inhabiting a semi ...
D, Copplestone +4 more
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Adsorption of natural radionuclides on pyrolusite
Water, Air, and Soil Pollution, 1987Analysis of Ra, Th, and Po in water samples and low active effluents from a U mining and milling complex generally involves pre-concentration of samples carried out by co-precipitation or by evaporation. This paper describes an alternative method by way of adsorption of these radionuclides on pyrolusite pebbles in a column and their subsequent elution ...
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Activity size distribution of natural radionuclides
Radiation Physics and Chemistry, 1994Abstract The activity size distributions of the natural radionuclides 7 Be, 210 Pb and 40 K were determined in the open air by means of γ spectroscopy. Size distributions of the radioactive aerosol particles were determined by using the low-pressure Berner cascade impactor (Model 20/0.015) as a sampling device. Moreover, the mass size distribution
A. El-Hussein, A.A. Ahmed
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Transfer of radionuclides in natural and semi-natural environments
Environmental Pollution, 1992+5 more sources
Nuclear-physical characteristics of natural radionuclides
Soviet Atomic Energy, 1986The authors present an equation for the dose rate produced by a layer of material uniformly saturated with radionuclides which is proportional to their effective specific activity. The initial data and the calculated activities of the natural radionuclides /sup 238/U, /sup 235/U, /sup 226/Ra, /sup 232/Th, and /sup 40/K are presented.
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A review of natural and anthropogenic radionuclide pollution in marine bivalves
Science of the Total Environment, 2023Kianann Tan, Billy K Y Kwan, Karsoon Tan
exaly