Assessing pesticides fate and aquatic and soil organisms’ exposure in three EU countries throughout integrated in-silico approach

OBJECTIVES\r\nTo develop an integrated modelling approach able to:\r\n• assess the fate and transport of PPPs used in three case studies, Portugal, the Netherlands and Denmark, one for each regulatory zone according to Regulation (EC) No. 1107/2009, in soil and water.\r\n• verify the model’s performance assumptions made during the development of the scenarios by comparing simulated data with monitoring data from case study sites (CSS).\r\n• assess the aquatic and soil organisms’ exposure to actual PPPs used in fields and their concentrations simulated by the models.\r\n\r\nHIGHLIGHTS \r\n• PECSW showed low, moderate and significant water bodies exposure to PPPs considered in PT, DK and NL, respectively.\r\n• Concentrations simulated in invertebrates and fish should not pose consumption risks for humans for PT and NL CSS. In DK CSS, for the herbicide prosulfocarb already a small consumption (13g) of a given invertebrate would lead to an estimated daily intake over the ADI.\r\n• PECsoil in PT CSS resulted lower than the monitored values whereas for NL and DK CSS an overestimation of one order of magnitude of the simulated PECsoil was observed.\r\n• For all three CSS the TER values indicate low risk for earthworms.\r\n• Beside several limitations, overall, the models performed well, with a difference of two orders of magnitude between monitored and simulated concentrations.