210Po sequential extraction applied to wetland soils at uranium mining sites.
J Environ Radioact
; 199-200: 1-6, 2019 Apr.
Article
em En
| MEDLINE
| ID: mdl-30639726
ABSTRACT
Former uranium mining activities have led to the presence of naturally occurring nuclides embedded in soil. Such activities have also modified the secular equilibrium between radionuclides in 238U decay series. The objective of this paper is to quantify the long-term effect of former uranium mining activities on the behavior of the final radionuclide in the 238U-series, i.e. polonium-210 (210Po), present in soils. Soil samples are extracted from two uranium sites in France, specifically a quarried site and a natural site. The polonium distribution is studied within the various soil fractions, namely water soluble, exchangeable, bound to carbonates, bound to iron/manganese oxides, bound to organic matter, and residual. 210Po is mainly found in the residual fraction of both study sites (87-90%), followed by the carbonates fraction (5-9%). The 210Po activity in the other fractions is very small in comparison with total activity.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Poluentes Radioativos do Solo
/
Monitoramento de Radiação
/
Polônio
/
Áreas Alagadas
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article