Glyphosate and AMPA distribution in Suquía river basin: an ecotoxicological risk assessment

BONANSEA R.I; FILIPI L.; MARINO D.J.; WUNDERLIN D.A.; AMÉ, M. V.

Barcelona

Congreso; 25° Annual Meeting SETAC-Europe.; 2015

SETAC

Glyphosate is the most widely used herbicide worldwide, in order to evaluate the occurrence of this pesticide and its microbiological degradation product, the aminomethylphosphonic acid (AMPA), this study measured their presences in freshwater, sediments and suspended particulate matter (SPM) samples from Suquía River basin in Córdoba, Argentina. From all the analyzed samples 35 % contained glyphosate, AMPA or both compounds. The concentrations were spread in different percentages depending on the environmental matrices considered, ranging from 12 to 20 times higher of glyphosate and AMPA in sediment and SPM than in water. The maximum concentrations found in water were 125 μg. l-1 of glyphosate and 4.8 μg. l-1 of AMPA, in sediment 1882.3 μg. kg-1 and AMPA 266.1 μg. kg-1 and in SPM 1570.7 μg. kg-1 of glyphosate and 684.9 μg. kg-1 of AMPA. The most polluted area came to be CM that is situated in a green belt zone, in second place are RP and SR, extensive agricultural areas. As regards the aquatic risk assessment in water and sediments, fish in LC and CM are threatened by the concentrations of glyphosate in water; these values were below the levels of concern for wildlife however it is convenient toupdate the limits established for freshwater aquatic protection.