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Determination of trace metal concentrations in a flooded tropicallake during a complete hydrological cycle

Published online by Cambridge University Press:  15 February 2009

W. J. Barreto ,
M. Reche Ribeiro ,
I. S. Scarminio ,
M. C. Solci ,
J. Nozaki ,
E. de Oliveira  and
S. R. Giancoli Barreto
W. J. Barreto
Affiliation:
Laboratory of Environmental Physical Chemistry, Department of Chemistry, CP 6001, Londrina State University, 86051-990, Londrina, Paraná, Brazil
M. Reche Ribeiro
Affiliation:
Laboratory of Environmental Physical Chemistry, Department of Chemistry, CP 6001, Londrina State University, 86051-990, Londrina, Paraná, Brazil
I. S. Scarminio
Affiliation:
Department of Chemistry, Londrina State University, 86051-990, Londrina, Paraná, Brazil
M. C. Solci
Affiliation:
Department of Chemistry, Londrina State University, 86051-990, Londrina, Paraná, Brazil
J. Nozaki
Affiliation:
Department of Chemistry, Maringa State University, 87020-900, Maringa, Paraná, Brazil
E. de Oliveira
Affiliation:
Institute of Chemistry, University of São Paulo, São Paulo, São Paulo, Brazil
S. R. Giancoli Barreto
Affiliation:
Graduate Program in Ecology of Aquatic and Continental Environments, Maringa State University, Av. Colombo, 5790. Maringa, PR, Brazil
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Abstract

The concentrations of the Al, Co, Cr, Cu, Pb, Sn, Ni, and Zn trace metals were monitored in Lake Ipê (Brazil) during two hydrological sub-periods : June - December 1999 (low water period, LW), and January - April 2000 (high water period, HW). A detailed study of the physical and chemical state of the metals was performed through the MINTEQA2 computer program using 15 abiotic parameters. An increase in concentration of many trace metals in July 1999 was due to the sudden entry of allochthonous matter. The seasonal study showed that the metal concentrations in the lake were governed by the hydrological regime of the Paran· River (HW), and by the occurrence of occasional flood pulses and rainfall (LW).

Keywords

lakesfreshwatertrace metalsICP-OESMINTEQA2
Type
Research Article
Information
Annales de Limnologie - International Journal of Limnology , Volume 41 , Issue 1 , March 2005 , pp. 47 - 55
Copyright
© Université Paul Sabatier, 2005

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