![Diffusion of ^2^2^6Ra and ^4^0K radionuclides reproduced in underwater sedimentary columns in laboratory [An article from: Journal of Environmental Radioactivity]](https://www.ebooknetworking.net/books/noimage.jpg)
Diffusion of ^2^2^6Ra and ^4^0K radionuclides reproduced in underwater sedimentary columns in laboratory [An article from: Journal of Environmental Radioactivity]
Description
This digital document is a journal article from Journal of Environmental Radioactivity, published by Elsevier in . The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.
Description:
The potential radiological impact of the increase of radioactive substances in the environment makes interesting the study of the migration of the contaminant radionuclides in soils and sediments, which are the last receiver system of these substances. By using a battery of sedimentary columns controlled in the laboratory, the diffusion of the ^2^2^6Ra and ^4^0K radionuclides has been studied, assessing their respective effective diffusion coefficients in a similar sedimentary medium. A decreasing temporal evolution is obtained, associated to the progressive 'fixation' of the radionuclides by the clay minerals of the sediment, followed by a constant tendency. A timescale of the 'fixation' by the sediment is determined, being of the order of days for ^2^2^6Ra and of the order of months for ^4^0K, so the progressive 'fixation' of ^4^0K by the clay minerals of the sediments is slower than in the case of ^2^2^6Ra.
Description:
The potential radiological impact of the increase of radioactive substances in the environment makes interesting the study of the migration of the contaminant radionuclides in soils and sediments, which are the last receiver system of these substances. By using a battery of sedimentary columns controlled in the laboratory, the diffusion of the ^2^2^6Ra and ^4^0K radionuclides has been studied, assessing their respective effective diffusion coefficients in a similar sedimentary medium. A decreasing temporal evolution is obtained, associated to the progressive 'fixation' of the radionuclides by the clay minerals of the sediment, followed by a constant tendency. A timescale of the 'fixation' by the sediment is determined, being of the order of days for ^2^2^6Ra and of the order of months for ^4^0K, so the progressive 'fixation' of ^4^0K by the clay minerals of the sediments is slower than in the case of ^2^2^6Ra.
