Distribution of antibiotics in water, sediments and biofilm in an urban river (Córdoba, Argentina, LA)

VALDÉS, M. EUGENIA; SANTOS, LÚCIA H.M.L.M.; RODRÍGUEZ CASTRO, M. CAROLINA; GIORGI, ADONIS; BARCELÓ, DAMIÀ; RODRÍGUEZ-MOZAZ, SARA; AMÉ, M. VALERIA

ENVIRONMENTAL POLLUTION

ELSEVIER SCI LTD

Año: 2021 vol. 269

0269-7491

n this study, we evaluated the distribution of up to forty-three antibiotics and 4 metabolites residues in different environmental compartments of an urban river receiving both diffuse and point sources of pollution. This is the first study to assess the fate of different antibiotic families in water, biofilms and sediments simultaneously under a real urban river scenario. Solid phase extraction, bead-beating disruption and pressurized liquid extraction were applied for sample preparation of water, biofilm and sediment respectively, followed by the quantification of target antibiotics by UPLC-ESI-MS/MS. Twelve antibiotics belonging to eight chemical families were detected in Suquía River samples (67% positive samples). Sites downstream the WWTP discharge were the most polluted ones. Concentrations of positive samples ranged 0.003-0.29 µg L-1 in water (max. cephalexin), 2-652 µg kg-1d.w. in biofilm (max. ciprofloxacin) and 2-34 µg kg-1d.w. in sediment (max. ofloxacin). Fluoroquinolones