Substances: Atenolol (InChiKey = METKIMKYRPQLGS-UHFFFAOYSA-N) Atrazine (InChiKey = MXWJVTOOROXGIU-UHFFFAOYSA-N) Bentazone (InChiKey = ZOMSMJKLGFBRBS-UHFFFAOYSA-N) Keywords: dynamics polar organic pollutants Variables: discharge