info:eu-repo/semantics/article
Contribution of soluble and particulate-matter fractions to the total glyphosate and AMPA load in water bodies associated with horticulture
Fecha
2020-02-10Registro en:
Mac Loughlin, Tomas Mariano; Peluso, María Leticia; Aparicio, Virginia Carolina; Marino, Damian Jose Gabriel; Contribution of soluble and particulate-matter fractions to the total glyphosate and AMPA load in water bodies associated with horticulture; Elsevier; Science of the Total Environment; 703; 134717; 10-2-2020; 1-24
0048-9697
CONICET Digital
CONICET
Autor
Mac Loughlin, Tomas Mariano
Peluso, María Leticia
Aparicio, Virginia Carolina
Marino, Damian Jose Gabriel
Resumen
Glyphosate-based herbicides are used in horticulture to prepare the soil for planting and to remove weeds surrounding greenhouses. Superficial runoff from production units can lead to glyphosate reaching nearby water bodies. Previous publications reported glyphosate's high affinity for suspended solids. The aim of the present work was to investigate the occurrence and concentrations of glyphosate and aminomethylphosphonic acid (AMPA) in soluble and suspended-particulate-matter fractions within the basin of the Carnaval-Stream, a water body traversing a horticultural greenbelt. Glyphosate and AMPA were detected in 67% and 83% of the samples, occurring in both fractions simultaneously at respective maximum concentrations of 17.0 and 4.5 μg.L1 in the soluble fraction and 35,620 and 19,586 μg.kg1 in the particulates. Although the calculated partition coefficients Kd confirmed that these compounds had tended to be associated with the particulate matter, the soluble glyphosate and AMPA contributed, on the average, to more than 90% of the total water volume. Although the analysis of suspended particulates is considered a more sensitive strategy for glyphosate and AMPA detection in surface water, these results demonstrate the need to analyze the soluble phase. The continual occurrence throughout a 3-year sampling was sufficient evidence demonstrating the use of glyphosate in horticulture.