Major, minor and trace elements determination using INAA in soil profile and sediment core samples collected in the catchment area of ponte nova reservoir, São Paulo – Brazil
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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
Elemental Chemical Characterization is a keystone in understanding environmental
phenomena and its effects. Major and trace elements give important data about
geological, physical, chemical and biological phenomena undergoing in natural environments.
Ponte Nova reservoir (23 34’43.23" S, 45 56’56.76" W) is the first
reservoir in a cascade system that was built in the 1970s to control Upper Tietê
River basin water flow. Nowadays, this reservoir serves as a source of water for agricultural
and industrial enterprises and as drinkable water source, and were a major
concern for the population of São Paulo state due to a recent severe drought in the
years of 2014 and 2015. In the present work, major and trace elements (As, Ba, Ce,
Co, Cr, Cs, Eu, Fe, Hf, K, La, Lu, Na, Nd, Rb, Sb, Sc, Sm, Tb, Yb and Zn) were
determined using Instrumental Neutron Activation Analysis (INAA) in the IEA-R1
nuclear reactor using the comparative method. This procedure consists in exposing
200mg of the sample and reference materials sealed in polypropylene bags to a thermal
neutron flux of 1 1012 cm2s1. Geo-accumulation indexes and enrichment
factors were determined and physicochemical parameters (grain size analysis, pH, real
and apparent densities, Loss on Ignition, porosity and humidity) were measured. The
major and trace element concentrations were compared with the Upper Continental
Crust values. Cluster analysis, correlation matrix and principal component analysis
were applied in all the results obtained to verify a probable correlation between the
major and trace elements determined in the soil and sediment samples.
Como referenciar
SILVA, A.R.; DAMATTO, S.R.; LEONARDO, L.; SOUZA, J.M. de; GONÇALVES, P.N.; MADUAR, M.F. Major, minor and trace elements determination using INAA in soil profile and sediment core samples collected in the catchment area of ponte nova reservoir, São Paulo – Brazil. 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. 16-16. Disponível em: http://repositorio.ipen.br/handle/123456789/28707. Acesso em: 13 Feb 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.