Inorganic chemical characterization of the soil and sediment from Taiaçupeba Reservoir, São Paulo
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2017
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60 YEARS OF IEA-R1: INTERNATIONAL WORKSHOP ON UTILIZATION OF RESEARCH REACTORS
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Resumo
Taiaçupeba reservoir, located in the state of São Paulo, Brazil, belongs to Producer
System of Alto Tietê (Sistema Produtor Alto Tietê –SPAT) and it is responsible
for water supply for about 3.1 million of people. The water quality of a reservoir
became very important in the last decades due to the increase of environmental
degradation of the soil and its several uses. Trace and major elements can accumulate
in high levels in soil and sediment, and the study of its concentration can indicate
if the ecosystem is polluted. Therefore, the study of soil profiles and sediment cores
are an important tool for the understanding of geophysical and geochemical aspects
of aquatic ecosystems. The objective of this work was to present the elements As, Ba, Br, Ca, Ce, Co, Cr, Cs, Eu, Fe, Hf, K, La, Lu, Na, Nd, Rb, Sb, Sc, Ta, Tb,
Th, U, Yb and Zn concentrations using Instrumental Neutron Activation Analysis
(INAA) in four soil profiles and four sediment cores collected in the influence area of
Taiaçupeba reservoir. To verify if these elements could be enriched and the ecosystem
polluted the Enrichment Factor and the Geoacumulation Index were also used.
Soil profiles were collected in trenches up to 2m deep and sampled every 5 cm; in the
laboratory the samples were dried at room temperature. The sediment samples were
collected with a manual PVC sampler sliced every 2 cm or according to their textural
characteristics, and dried in an oven at 50 C; the length of the sediment cores
ranged from 42 cm to 61 cm. After drying, soil and sediment samples were sieved
in a 2 mm mesh and packed in polyethylene bottles for INAA. The elements Na, As
and Sb presented the highest values for both soil and sediment samples, implying
in continuous, regular and spatial monitoring of the reservoir. One sediment core
presented a very high concentration of the element Zn when compared to the values
of the Upper Continental Crust, indicating a possible anthropic contribution from the
region’s industries and classifying the reservoir as extremely polluted in relation to
this element. In the evaluation of the enrichment factor it was concluded that the
soil presented very high enrichment for the elements Na, As and Sb and the sediment
presented very severe enrichment for the elements Na, As and Zn.
Como referenciar
LEONARDO, L.; SOUZA, J.M.; DAMATTO, S.R.; SURKOV, A.M.; MADUAR, M.F.; SILVA, A.R. Inorganic chemical characterization of the soil and sediment from Taiaçupeba Reservoir, São Paulo. In: 60 YEARS OF IEA-R1: INTERNATIONAL WORKSHOP ON UTILIZATION OF RESEARCH REACTORS, November 28 - December 01, 2017, São Paulo, SP. Abstract... São Paulo, SP: Instituto de Pesquisas Energéticas e Nucleares, 2017. p. 37-38. Disponível em: http://repositorio.ipen.br/handle/123456789/28734. 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.