Risk evaluation and prioritization of contaminants of emerging concern and other organic micropollutants in two river basins of central Argentina

AMÉ, MARÍA VALERIA

THE SCIENCE OF TOTAL ENVIRONMENT

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2023

0048-9697

research gap exists in baseline concentrations of organic micropollutants in SouthAmerican rivers. Identification of areas with different degrees of contamination and riskto the inhabitant biota is needed to improve management of freshwater resources.Here we inform the incidence and ecological risk assessment (ERA) of current usedpesticides (CUPs), pharmaceutical and personal care products (PPCPs) andcyantoxins (CTX) measured in two river basins from central Argentina (South America).Risk Quotients approach was used for ERA differentiating wet and dry seasons. Highrisk was associated to CUPs in both basins (45% and 30% of sites from Suquía andCtalamochita rivers, respectively), mostly in the basins extremes. Main contributors torisk in water were insecticides and herbicides in Suquía river and insecticides andfungicides in Ctalamochita river. In Suquía river sediments, a very high risk wasobserved in the lower basin, mainly from AMPA contribution. Additionally, 36% of thesites showed