Screening Concentration of E1, E2 and EE2 in Sewage Effluents and Surface Waters of the ??Pampas?? Region and the ??Río de la Plata?? Estuary (Argentina)

VALDES, M.E.; MARINO, D.J.; WUNDERLIN, D.A.; SOMOZA, G.M.; RONCO, A.E.; CARRIQUIRIBORDE, P.

BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY

SPRINGER

Lugar: Berlin; Año: 2015 vol. 1 p. 1 - 5

0007-4861

Concentrations of estrone (E1), 17b-estradiol (E2)and 17a-ethinylestradiol (EE2) were investigated for the first time in sewage effluents and receiving waters of the ??Río de la Plata?? estuary and neighboring areas by means of LC? MS/MS.E2andEE2wereubiquitousintheevaluatedsewage effluent samples showing concentrations ranging between 122?631 and 65?187 ng/L, respectively. In surface waters, these estrogens were only detected in the ??Girado?? stream (Chascomús) at 369 and 43 ng/L, respectively. No significant relationship was found among the size of the served population and the concentration of the estrogens in the sewage effluent. The detection of these estrogens in receiving waters was dependent on the dilution capacity of the system. The studied strogens were undetectable at the La Plata City water supply station. Conversely, concentrations found at the ??Girado?? stream indicate a potential ecotoxicological risk of these estrogens to the local aquatic biota.