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Forskningsartikel2020Vetenskapligt granskad

Decyl glucoside surfactant Triton CG-110 does not significantly affect the environmental fate of glyphosate in the soil at environmentally relevant concentrations

Carretta, Laura; Cardinali, Alessandra; Masin, Roberta; Zanin, Giuseppe; Cederlund, Harald

Sammanfattning

Glyphosate is the most common herbicide worldwide, and its impact on the environment has increasingly been scrutinized. Glyphosate-based formulations can contain co-formulants, among which are surfactants. This study aimed to investigate whether the presence of an alkyl polyglucoside-based surfactant, Triton CG-110, affects the adsorption, leaching, and mineralisation of glyphosate in the soil. The experiments were conducted in two soils with different textures (sandy and clay) and in washed sand. Glyphosate and surfactant mixtures were applied at realistic field rates. Because of ponding and scarce leaching from the field soil, the leaching experiments were conducted only with washed sand. The results indicate a reduction of glyphosate adsorption in washed sand (from K-f = 13.5 to 3.99 mu g(1-1/n) (ml)(1/n) g(-1)) and in sandy soil (from K-f = 165 to 90.8 mu g(1-1/ n) (ml)(1/n) g(-1)) when using a Triton CG-110 concentration of 0.5 %, which corresponds to that of a spraying solution applied in the field, whereas adsorption in clay soil was unaffected. Triton CG-110 did not significantly affect glyphosate leaching in washed sand or mineralisation in any of the tested soils. The results indicate that Triton CG-110 is unlikely to significantly affect the environmental fate of glyphosate in the soil at environmentally relevant concentrations.

Nyckelord

Herbicide; Alkyl polyglucosides; Adsorption; Leaching; Mineralization

Publicerad i

Journal of Hazardous Materials
2020, Volym: 388, artikelnummer: 122111

    Associerade SLU-program

    SLU Nätverk växtskydd

    UKÄ forskningsämne

    Markvetenskap
    Miljövetenskap
    Miljö- och naturvårdsvetenskap

    Publikationens identifierare

    DOI: https://doi.org/10.1016/j.jhazmat.2020.122111

    Permanent länk till denna sida (URI)

    https://res.slu.se/id/publ/103925