Diagnóstico Espaço-Temporal da Ocorrência de Herbicidas nas Águas Superficiais e Sedimentos do Rio Corumbataí e Principais Afluentes
Eduardo Dutra de Armas, Regina Teresa Rosim Monteiro, Paula Munhoz Antunes, Maria Alice Penna Firme dos Santos e Plinio Barbosa de Camargo
Centro de Energia Nuclear na Agricultura, Universidade de São Paulo, CP 96, 13400-970 Piracicaba - SP, Brasil
Rosangela Blotta Abakerli
Embrapa Meio Ambiente, CP 69, 13820-000 Jaguariúna - SP, Brasil
Quim. Nova, Vol. 30, N. 5, 1119-1127, 2007.
Spatial-Temporal Diagnostic of Herbicide Occurrence in Surface Waters and Sediments of Corumbataí River and Main Affluents
ABSTRACT
Residues of herbicides from sugarcane were monitored in waters and sediments of Corumbataí River and tributaries. Ametryne, atrazine, simazine, hexazinone, glyphosate, and clomazone were detected in water samples, with negligible levels of ametryne and glyphosate in sediment samples. The area of recharge of the Guarani aquifer presented the highest triazine and clomazone levels. The triazines were detected at higher levels, with atrazine above Brazil's potability and quality standards. Total herbicide levels at some sampling points were 13 times higher than the European Community potability limit. There is no Brazilian standard for ametryne, although the risk is larger due to ametryne's higher toxicity for the aquatic biota.
Keywords: monitoring; pesticide; water quality. |
