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Monitoring of toxic chemical in the basin of Maringá stream

2012; Editora da Universidade Estadual de Maringá (Eduem); Volume: 34; Issue: 3 Linguagem: Inglês

10.4025/actascitechnol.v34i3.10302

1807-8664

Rosane Freire Boina, Roselene Maria Schneider, Fabrício Hernandes de Freitas, Cássia Maria Bonifácio, Célia Regina Granhen Tavares,

Pesticide and Herbicide Environmental Studies

This study aimed to track the spatial and temporal variations of toxic chemical compounds, such as the metals Al, Cd, Pb, Cu, Cr, Mn, Zn and the pesticide glyphosate, in Maringá stream and in a stretch of Pirapó river. The results pointed out that, in the case of metals, one of the possible sources of these elements is associated to agricultural activities. For glyphosate, were not found concentrations above those established by the Brazilian Water Quality Legislation (CONAMA 357/2005). Concerning this, we emphasized that the impact caused by the agrochemical on water quality should be evaluated considering the adverse effects to the environment caused by its degradation, that produces recalcitrant and surfactant compounds that may be even more toxic for humans and aquatic environment.