Removal efficiency of sup(75)Se, sup(51) Cr and sup(60)Co from tidal water by mangrove sediments from Sepetiba Bay (SE Brazil)
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2014
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Journal of Radioanalytical and Nuclear Chemistry
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Resumo
Mangrove sediment cores sampled from
Sepetiba Bay (SE Brazil) were covered with tidal water
spiked with 75Se, 51Cr and 60Co to evaluate the removal
efficiency of these radiotracers by underlying sediments.
Variable time-evolution trends were observed along 115 h
experiments, with significant differences between removal
efficiencies of all radiotracers observed only after 70 h
(
51Cr[60Co[75Se). After an event of 60Co release back
to overlying water, there was a general trend of lower 60Co
removal than observed for other radiotracers during the
period from 20 to 54 h. After this event, alternated periods
of higher 60Co and higher 75Se removal trends were
observed, attributed to behavioural differences expected for
such anionic and cationic radiotracers. While 75Se and 51Cr
showed uniform time-evolution curves, as typically found
in the literature for most radiotracers, 60Co removal rates
presented oscillations, probably due to sensitivity to
changes in redox conditions within underlying sediments.
Results evidenced the role of mangrove sediments as trace
element sinks, which have implications for coastal water
quality and for possible uses of such sediments in wastewater treatment systems.
Como referenciar
SUZUKI, K.N.; MACHADO, E.C.; MACHADO, W.; BELLIDO, A.V.B.; BELLIDO, L.F.; OSSO JUNIOR, J.A.; LOPES, R.T. Removal efficiency of sup(75)Se, sup(51) Cr and sup(60)Co from tidal water by mangrove sediments from Sepetiba Bay (SE Brazil). Journal of Radioanalytical and Nuclear Chemistry, v. 299, n. 1, p. 357-361, 2014. DOI: 10.1007/s10967-013-2760-z. Disponível em: http://repositorio.ipen.br/handle/123456789/8988. Acesso em: 11 May 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.