Assessment, distribution, and ecological risk of contaminants of emerging concern in a surface water-sediment-fish system impacted by wastewater.
Sci Total Environ
; 935: 173358, 2024 Jul 20.
Article
en En
| MEDLINE
| ID: mdl-38768727
ABSTRACT
The presence of contaminants of emerging concern in aquatic ecosystems represents an ever-increasing environmental problem. Aquatic biota is exposed to these contaminants, which can be absorbed and distributed to their organs. This study focused on the assessment, distribution, and ecological risk of 32 CECs in a Spanish river impacted by effluents from a wastewater treatment plant, analyzing the organs and plasma of common carp. Environmental concentrations in water and sediment were examined at sites upstream and downstream of the wastewater treatment plant. The two downstream sites showed 15 times higher total concentrations (12.4 µg L-1 and 30.1 µg L-1) than the two upstream sites (2.08 µg L-1 and 1.66 µg L-1). Half of the CECs were detected in fish organs, with amantadine having the highest concentrations in the kidney (158 ng g-1 w.w.) and liver (93 ng g-1 w.w.), followed by terbutryn, diazepam, and bisphenol F in the brain (50.2, 3.82 and 1.18 ng g-1 w.w.). The experimental bioaccumulation factors per organ were compared with the bioconcentration factors predicted by a physiologically based pharmacokinetic model, obtaining differences of one to two logarithmic units for most compounds. Risk quotients indicated a low risk for 38 % of the contaminants. However, caffeine and terbutryn showed an elevated risk for fish. The mixed risk quotient revealed a medium risk for most of the samples in the three environmental compartments surface water, sediment, and fish.
Palabras clave
Texto completo:
1
Base de datos:
MEDLINE
Asunto principal:
Contaminantes Químicos del Agua
/
Monitoreo del Ambiente
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Sedimentos Geológicos
/
Aguas Residuales
Límite:
Animals
País/Región como asunto:
Europa
Idioma:
En
Revista:
Sci Total Environ
Año:
2024
Tipo del documento:
Article