J. Phys. IV France
Volume 107, May 2003
Page(s) 1283 - 1286

J. Phys. IV France
107 (2003) 1283
DOI: 10.1051/jp4:20030535

Copper speciation in Iguaçu river basin, at Curitiba's metropolitan region, Brazil, by ligand competition using DPASV

M. Tadeu Grassi and F. F. Sodré

Department of Chemistry, Federal University of Parana, CP. 19.081, 81531-990 Curitiba, Brazil

Copper concentrations and speciation in two different sites located in the Iguaçu River Basin, Brazil, were evaluated during a 10-months period, in this work. Results showed a seasonal influence on copper levels with a major contribution of non-point sources during the rainy season, when concentrations of copper were similar in both Irai and Iguaçu Rivers. During the dry season the discharge of raw sewage was the primary source of copper for the sampling point located downstream the city of Curitiba, in the Iguaçu River, which exhibited higher metal concentrations. Speciation results also showed different patterns. Higher copper contents were found in the particulate phase in Iguaçu River, whereas labile copper concentrations were relatively greater in Irai River waters.

© EDP Sciences 2003