Accumulation of rare earth elements, U and Th in floating macrophytes from the Guarapiranga Reservoir
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2019
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INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE
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Resumo
Macrophytes play a relevant role in aquatic environments since they may accumulate metallic elements and can
be an important tool for bioaccumulation studies, especially concerning an important and strategic water supply
as Guarapiranga Reservoir. The reservoir is one of the main water supply systems in the São Paulo Metropolitan
Region, contributing with 20% of the water provided to the region, which represents a water supply for about 3.7
million people. The industrial use of rare earth elements (REEs) has increased in the last years, affecting the levels
of REEs in urban environments. Information about REEs accumulation in macrophytes of reservoirs are scarce,
and none for Guarapiranga Reservoir. This study aims to evaluate REEs, U and Th concentration in floating
macrophytes of Guarapiranga Reservoir, in order to assess possible sources and potential environmental impacts.
Sampling was performed with the support of the Environmental Agency of the state of São Paulo (CETESB) in
three points along the reservoir for dry (September 2016) and wet season (March and April 2016). Macrophyte
samples were analyzed by Instrumental Neutron Activation Analysis (INAA) for REEs and Th and by Inductively
Coupled Plasma Mass Spectrometry (ICP MS) for U. The results obtained were compared to Guarapiranga soil
values and to other study using floating macrophytes, indicating a natural source of these elements in
Guarapiranga Reservoir.
Como referenciar
COUTINHO, SUELLEN N.; FIGUEIREDO, ANA MARIA G.; QUINAGLIA, GILSON A; HELD, BARBARA. Accumulation of rare earth elements, U and Th in floating macrophytes from the Guarapiranga Reservoir. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 835-844. Disponível em: http://repositorio.ipen.br/handle/123456789/30528. Acesso em: 30 Dec 2025.
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.