Pyrethroids in the MAB reserve Mar Chiquita coastal lagoon: An approach to evaluate the probabilistic risks on aquatic organisms

DÍAZ JARAMILLO, M.; MARTINEZ, D.; TUCA, F.; MIGLIORANZA, K.S.B.; GONZALEZ, M.; ELJARRAT, E.

Cartagena

Congreso; SETAC Latin America 13th Biennial Meeting; 2019

SETAC LA

Synthetic pyrethroids have been commonlly used by agriculture to control ectoparasitic infections on crops as well as domestic use to control pests. Once pyrethroids are released to environment they are characterized to be highly hydrophobic (log Kow > 6) and low soluble in water (< 0.004 mg/L), being these rapidly associated to suspended particles or biological tissues, being even toxic at very low concentrations. Mar Chiquita estuary (Buenos Aires, Argentina) is connected by several streams, which are influenced by different agricultural activities. The main objective of this study was determining the presence of Pyrethroids in sediments and particulate matter from Mar chiquita basin and its ecological risk assessment to estuarine species, which inhabited these transition environments. Both sediment and particulate matter samples were extracted through soxhletand quantified by using a GC-MS.Ecotoxicological information for pyrethroids were compiled from open literature (i.e., ECOTOX database, ECHA, ETOX, among others). The database was used to calculate the Hazardous Concentration (HC5) derived from Species Sensitivity Distribution (SSD). Preliminary results revealed the presence of 13 types of pyrethorids insecticides in both matrixes being Permethrin the most abundant. The sensitivity curve reported higher vulnerability for estuarine than freshwater or marine animals. Measured Environmental Concentrations (MEC) were determined. in organism exposed to the pyrethroids ??. In conclusion, this study showed a first approach to know the environmental presence of pyrethroids in estuarine protected areas from Southamerica and its ecological impact on related aquatic organis