Glyphosate
- Anne Louise GimsingAnne Louise GimsingDepartment of Natural Sciences, The Royal Veterinary and Agricultural University, Thorvaldsensvej 40, 1871 Frederiksberg C., DenmarkMore by Anne Louise Gimsing
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- Afonso Maria dos SantosAfonso Maria dos SantosINQUIMAE and Departamento de Química Inorgánica, Analítica y Química Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria Pabellǒn II 3er Piso, C1428EHA Buenos Aires, ArgentinaMore by Afonso Maria dos Santos
Abstract
The herbicide glyphosate (N-phosphonomethylglycine) interacts strongly with many soil components. It forms strong complexes with many metals in solution, and it is adsorbed through innersphere complexation to iron- and aluminium oxides. Glyphosate can also be adsorbed by clay minerals by forming complexes with interlayer cations. Because of these interactions, glyphosate is strongly adsorbed in soils. It is mainly the phosphonic acid moiety that participates in the adsorption, and therefore phosphate competes with glyphosate for adsorption sites.