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Spatial variation of trace elements in the Tiete river bottom sediments (Sao Paulo, Brazil): enrichment factors and anthropogenic contributions

Mortatti, Jefferson and Probst, Jean-Luc and De Oliveira, Helder and Hissler, Christophe and Fernandes, Alexandre Martins and Bibian, João Paulo Rambelli and Lopes, Renato Alessandro Spatial variation of trace elements in the Tiete river bottom sediments (Sao Paulo, Brazil): enrichment factors and anthropogenic contributions. In: INAC 2007 International nuclear atlantic conference, 30 September 2007 - 5 October 2007 (Santos, Brazil).

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Official URL: https://inis.iaea.org

Abstract

The spatial variation of some trace elements (Ni, Cr, Zn, Cu, Sc, Co, Rb, Sr, Cs, Pb, Th and U) was studied in the bottom sediments of the Tietê river in São Paulo, Brazil. The main objective was to identify the enrichment factors and possible anthropic contributions to the observed high toxicity of these chemical elements in this drainage basin, which crosses the metropolitan area of São Paulo city with about 20 millions people and receives a large load of domestic and industrial wastes. The chemical analyses were performed after the chemical extraction procedure using alkaline fusion with Lithium tetraborate. An Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES) and a Neutron Activation Analysis (NAA) were used for the analytical purposes. The enrichment factor was calculated by the relationship between the concentration of each trace element in the bottom sediment and the natural soil background in the drainage basin, weighted by the conservative Sc.

Item Type:Conference or Workshop Item (Paper)
Audience (conference):International conference proceedings
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Universidade de São Paulo - USP (BRAZIL)
Laboratory name:
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Deposited By: Jean-luc PROBST
Deposited On:17 Dec 2014 14:37

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