Enhancement of pesticide photo-Fenton oxidation at high salinities

► The performance of photo-Fenton at high salinity conditions has not be assessed enough. ► Salinity seems to have a noticeable effect over photo-Fenton parameters. ► Methomyl and imidacloprid depletions were enhanced by higher conductivities, while total organic carbon was worsened. ► Chloride anions seem to be the main causatives of the salts influence over the process. ► Organic substances can interact with Fe3+ affecting the whole process.