Effect of UV-A, UV-B and UV-C irradiation of glyphosate on photolysis and mitigation of aquatic toxicity.

ABSTRACT: The active herbicide ingredient glyphosate [N-(phosphonomethyl)glycine] is frequently detected as a contaminant in groundwater and surface waters. This study investigated effects of UV-A (365 nm), UV-B (302 nm) and UV-C (254 nm) irradiation of glyphosate in water on photolysis and toxicity to aquatic organisms from different trophic levels. A test battery with bacteria (Bacillus subtilis, Aliivibrio fischeri), a green microalga (Raphidocelis subcapitata), and a crustacean (Daphnia magna) was used to assess biological effect of glyphosate and bioactive transformation products before and after UV irradiation (4.7-70 J/cm²). UV-C irradiation at 20 J/cm² resulted in a 2-23-fold decrease in toxicity of glyphosate to aquatic test organisms. UV-B irradiation at 70 J/cm²

SUBMITTER: Papagiannaki D 

PROVIDER: S-EPMC7679408 | biostudies-literature | 2020 Nov

REPOSITORIES: biostudies-literature