Monitoring of Atrazine Pollution and its Spatial-Seasonal Variation on Surface Water Sources of an Agricultural River Basin

• Published in: Bulletin of environmental contamination and toxicology Vol. 106; no. 6; pp. 929 - 935
• Main Authors: Bachetti, Romina A., Urseler, Noelia, Morgante, Verónica, Damilano, Gabriela, Porporatto, Carina, Agostini, Elizabeth, Morgante, Carolina
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.06.2021; Springer Nature B.V
• Subjects: Agricultural land; Aquatic Pollution; atmospheric deposition; Atrazine; Autumn; Earth and Environmental Science; Ecotoxicology; Environment; Environmental Chemistry; Environmental Health; Herbicides; Land use; Pollution; Pollution detection; Pollution dispersion; Pollution monitoring; Rainy season; River basins; Rivers; Runoff; Seasonal variations; Soil Science & Conservation; spring; Surface water; toxicology; Waste Water Technology; Water Management; Water Pollution Control; watersheds; Pollution; Herbicide persistence; Surface water; Spatial-seasonal distribution; Atrazine
• ISSN: 0007-4861; 1432-0800; 1432-0800
• DOI: 10.1007/s00128-021-03264-x

Surface water sources are greatly impacted in areas with major agricultural land use. The atrazine quantification in surface waters as well as the spatial-temporal patterns of this herbicide was studied to detect pollution hotspots and to understand the putative factors responsible of its occurrence at the Ctalamochita river basin. The samples were collected on the aeolian fluvial plain of the river basin during five consecutive years. The results showed the high ubiquity of this compound and several sites with hazardous concentration (exceeding 0.1 µg/L international guidelines). The frequencies of quantification range from 67 to 100% in spring and 33%–67% in autumn. The atrazine content in surface water increased during the warm-rainy season, as consequence of atrazine application events (coinciding to the prevalent crop type). Overall, the study highlights the factors that could have favored atrazine pollution in the river basin such as land use, transport by runoff processes and atmospheric deposition.