Evaluation of the sedimentation rate in a sediment profile of Bortolan Dam - MG, Brazil
Carregando...
Data
Data de publicação:
2017
Autores IPEN
Orientador
Título da Revista
ISSN da Revista
Título do Volume
É parte de
É parte de
É parte de
É parte de
INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE
Exportar
Resumo
Volcanic extrusion is one of the main causes for the high levels of environmental radioactivity in the region of Poços de Caldas (MG, Brazil). Uranium mining during the 80’s further increased the background radiation in the region, especially in the Ribeirão das Antas watershed, where Bortolan Dam is located. Besides the uranium mining facility operating in the region, other activities, such as agriculture, were also responsible for the enhancement of the levels of radioactivity. The dam sediment profile provides an appropriate compartment for the study of the temporal variation of these radionuclides and for the evaluation of anthropogenic contamination. The main aim of this study is to evaluate the sedimentation rate and the dating of a profile collected in Bortolan Dam, by using the geochronology method. The activity concentration of 226Ra and 210Pb were measured in the sediment profile by gamma spectrometry. The concentration of 226Ra and 210Pb varied from (217 ± 9) Bq kg-1 to (286 ± 12) Bq kg-1 and from (262 ± 11) Bq kg-1 to (322 ± 34) Bq·kg-1 respectively; and the sedimentation rates varied from 0.021 to 0.144 g cm-2y-1.
Como referenciar
ALMEIDA, HELEINE C. de; SOARES, FLAVIO V.T.S.; TADDEI, MARIA H.T.; MAZZILLI, BARBARA P. Evaluation of the sedimentation rate in a sediment profile of Bortolan Dam - MG, Brazil. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 22-27, 2017, Belo Horizonte, MG. Proceedings... Rio de Janeiro, RJ: Associação Brasileira de Energia Nuclear, 2017. Disponível em: http://repositorio.ipen.br/handle/123456789/28263. Acesso em: 18 Apr 2024.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.