Metal, trace and rare earth elements assessment in a sediment profile from Taiaçupeba Reservoir, São Paulo state, by INAA
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2019
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INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE
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The Taiaçupeba reservoir is located on the border of Mogi das Cruzes and Suzano counties and composes the Alto
Tietê Producing System (SPAT). The region shows high population density and industrial production, which cause
waste and contaminants generation, which can affect the water supply quality. The purpose of this study was to
evaluate the concentration and distribution of As, Ba, Br, Co, Cr, Cs, Fe, Hf, K, Na, Rb, Sb, Sc, Ta, Th, U, Zn and
the rare earth elements (Ce, Eu, La, Lu, Nd, Sm, Tb and Yb), present in a sediment profile collected in the
Taiaçupeba reservoir. Sampling was performed in 2016 by CETESB for monitoring purposes. Instrumental
Neutron Activation Analysis technique was applied for multilemental determinations. A great variation of the
concentration for the elements analyzed along the sediment profile was observed, with a concentration peak in the
depth of 20cm for all elements and decreasing in the deepest slices. Enrichment factor (EF) and Geoacumulation
Index (IGeo) tools used to evaluate the presence of anthropogenic pollution sources indicated As and Zn
contamination, mainly in the more recent sediment samples (from 0 to 5 cm depth). When the concentration values
for As, Cr and Zn were compared to TEL and PEL for quality sediment evaluation, none of the concentration
values for As and Cr surpassed the PEL values but not Zn. The results showed that an important anthropogenic
contribution for As, Cr and Zn in the upper layers of the sediment core is occurring.
Como referenciar
SCHENEMANN, GISIELE; FRANKLIN, ROBSON L.; FAVARO, DEBORAH I.T. Metal, trace and rare earth elements assessment in a sediment profile from Taiaçupeba Reservoir, São Paulo state, by INAA. In: INTERNATIONAL NUCLEAR ATLANTIC CONFERENCE, October 21-25, 2019, Santos, SP. Proceedings... Rio de Janeiro: Associação Brasileira de Energia Nuclear, 2019. p. 975-988. Disponível em: http://repositorio.ipen.br/handle/123456789/30541. Acesso em: 30 Dec 2025.
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