Glyphosate, AMPA, and metsulfuron-methyl retention in the main horizons of a Typic Argiudoll

DE GERÓNIMO, EDUARDO; COSTA, JOSÉ L.; APARICIO, VIRGINIA C.; RHEINHEIMER DOS SANTOS, DANILO; GONZALO MAYORAL, ELIANA S.; FERNANDES, GRACIELI

JOURNAL OF ENVIRONMENTAL SCIENCE AND HEALTH. PART B - PESTICIDES, FOOD CONTAMINANTS, AND AGRICULTURAL WASTES

TAYLOR & FRANCIS INC

Año: 2022 vol. 57 p. 526 - 540

0360-1234

Retention is one of the processes controlling the behavior and fate of pesticides in soil. Theobjective of this work was to evaluate the adsorption and desorption of glyphosate, AMPA, andmetsulfuron-methyl in the main horizons of a Typic Argiudoll destined for agricultural use. For thispurpose, the batch equilibrium method was used at a range of concentrations for each compound. Desorption was performed in three consecutive steps after the adsorption experiment. Theresults obtained showed strong adsorption of glyphosate and AMPA in the three horizons, following the trend B > A > C, with weak desorption. Metsulfuron-methyl, on the other hand, showedweak adsorption in the three horizons, following the trend A > B > C, with relevant desorption.Our results allow us to identify metsulfuron-methyl as the compound that poses the greatestenvironmental risk in terms of the potential contamination of other areas and groundwater.However, despite their strong adsorption and weak desorption, glyphosate and AMPA also represent potential contaminants of other environmental matrices.