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The influence of Brazilian soils properties in Americium sorption

Published online by Cambridge University Press:  09 January 2012

J. Barescut ,
D. Lariviere ,
T. Stocki ,
M.A.V. Wasserman ,
T.R. Pereira ,
E.R.R. Rochedo ,
W.O. Sousa ,
D.V. Pérez ,
E.F.M. Pinheiro  and
F.F.L. Simões Filho
M.A.V. Wasserman
Affiliation:
Instituto de Radioproteção e Dosimetria; 22780-160 Rio de Janeiro, RJ, Brasil e-mail: angelica@ird.gov.br
T.R. Pereira
Affiliation:
Instituto de Radioproteção e Dosimetria; 22780-160 Rio de Janeiro, RJ, Brasil e-mail: angelica@ird.gov.br
E.R.R. Rochedo
Affiliation:
Instituto de Radioproteção e Dosimetria; 22780-160 Rio de Janeiro, RJ, Brasil e-mail: angelica@ird.gov.br
W.O. Sousa
Affiliation:
Instituto de Radioproteção e Dosimetria; 22780-160 Rio de Janeiro, RJ, Brasil e-mail: angelica@ird.gov.br
D.V. Pérez
Affiliation:
Centro Nacional de Pesquisa de Solos/EMBRAPA. R. Jardim Botânico, 1024, CEP 22460-000, RJ, Brasil
E.F.M. Pinheiro
Affiliation:
Universidade Federal Rural do Rio de Janeiro, Instituto de Agronomia, Seropédica, RJ, Brasil
F.F.L. Simões Filho
Affiliation:
Instituto de Engenharia Nuclear, Rua Hélio de Almeida, 75, Cidade Universitária, Ilha do Fundão, 21941-972, Rio de Janeiro, RJ, Brasil
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Abstract

Although some radioecological studies have been accomplished in Brazilian soils supplying useful information to optimization of emergency planning actions in rural areas and to the management of soils contaminated by 137Cs, 60Co and 90Sr, few studies were made with transuranic elements in tropical agricultural areas. The different scenarios found in Brazilian agricultural environments enhance the importance of studying the biogeochemical behavior of radionuclides in representative soils. The objective of this work was to determine the mobility of 241Am in 3 different Brazilian agricultural soils evaluating migration with depth and Kd values for 241Am and the effect of organic amendments on this behavior. A strong effect of organic amendments on mobility of americium could be observed. The values of Kd obtained in all studied tropical soils were however smaller than those found in European soils and from those recommended by IAEA to be used as default values in the absence of regional data. This result reinforces the vulnerability of some tropical soils to a contamination, emphasizing the need to use of regional values.

Type
Research Article
Information
Radioprotection , Volume 46 , Issue 6: ICRER 2011 – International Conference on Radioecology & Environmental Radioactivity: Environment & Nuclear Renaissance , 2011 , pp. S579 - S585
Copyright
© Owned by the authors, published by EDP Sciences, 2011

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