High (36)Cl/Cl ratios in Chernobyl groundwater.
J Environ Radioact
; 138: 19-32, 2014 Dec.
Article
em En
| MEDLINE
| ID: mdl-25128774
ABSTRACT
After the explosion of the Chernobyl Nuclear Power Plant in April 1986, contaminated material was buried in shallow trenches within the exclusion zone. A (90)Sr plume was evidenced downgradient of one of these trenches, trench T22. Due to its conservative properties, (36)Cl is investigated here as a potential tracer to determine the maximal extent of the contamination plume from the trench in groundwater. (36)Cl/Cl ratios measured in groundwater, trench soil water and leaf leachates are 1-5 orders of magnitude higher than the theoretical natural (36)Cl/Cl ratio. This contamination occurred after the Chernobyl explosion and currently persists. Trench T22 acts as an obvious modern point source of (36)Cl, however other sources have to be involved to explain such contamination. (36)Cl contamination of groundwater can be explained by dilution of trench soil water by uncontaminated water (rainwater or deep groundwater). With a plume extending further than that of (90)Sr, radionuclide which is impacted by retention and decay processes, (36)Cl can be considered as a suitable tracer of contamination from the trench in groundwater provided that modern release processes of (36)Cl from trench soil are better characterized.
Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Radioisótopos
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Poluentes Radioativos do Solo
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Poluentes Radioativos da Água
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Água Subterrânea
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Cloro
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Monitoramento de Radiação
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Acidente Nuclear de Chernobyl
País/Região como assunto:
Europa
Idioma:
En
Revista:
J Environ Radioact
Assunto da revista:
SAUDE AMBIENTAL
Ano de publicação:
2014
Tipo de documento:
Article