Occurrence of rare earth elements in water, sediment, and freshwater fish of diverse trophic levels and feeding ecology: Insights from the Po river (northwest Italy).

Autor: Pastorino P; The Veterinary Medical Research Institute for Piemonte, Liguria and Valle d'Aosta, 10154, Torino, Italy. Electronic address: paolo.pastorino@izsto.it., Squadrone S; The Veterinary Medical Research Institute for Piemonte, Liguria and Valle d'Aosta, 10154, Torino, Italy., Berti G; The Veterinary Medical Research Institute for Piemonte, Liguria and Valle d'Aosta, 10154, Torino, Italy., Esposito G; The Veterinary Medical Research Institute for Piemonte, Liguria and Valle d'Aosta, 10154, Torino, Italy., Bondavalli F; The Veterinary Medical Research Institute for Piemonte, Liguria and Valle d'Aosta, 10154, Torino, Italy., Renzi M; Department of Life Sciences, University of Trieste, 34127, Trieste, Italy., Pizzul E; Department of Life Sciences, University of Trieste, 34127, Trieste, Italy., Kazmi SSUH; Guangdong Provincial Key Laboratory of Marine Disaster Prediction and Prevention, Shantou University, Shantou, 515063, China., Barceló D; Institute of Environmental Assessment and Water Research (IDAEA-CSIC), 08034, Barcelona, Spain., Abete MC; The Veterinary Medical Research Institute for Piemonte, Liguria and Valle d'Aosta, 10154, Torino, Italy., Prearo M; The Veterinary Medical Research Institute for Piemonte, Liguria and Valle d'Aosta, 10154, Torino, Italy.
Jazyk: angličtina
Zdroj: Environmental research [Environ Res] 2024 Jan 01; Vol. 240 (Pt 1), pp. 117455. Date of Electronic Publication: 2023 Oct 19.
DOI: 10.1016/j.envres.2023.117455
Abstrakt: To date, the occurrence of rare earth elements (REEs) in freshwater ecosystems has garnered limited attention in the scientific literature. Furthermore, a dearth of data exists regarding their potential bioaccumulation in freshwater fish. To fill this knowledge gap, we studied REEs concentrations in water, sediment, and fish specimens collected along the Po River (northwest Italy) and calculated biota-sediment accumulation (BSAF) and bioconcentration (BCF) factors, while taking into account fish feeding behavior and trophic level effects on the overall content of total REEs (ƩREEs). The fish communities were composed of native and non-native species. Remarkably low concentrations of REEs (<0.0003 mg/L) were detected in the water samples, indicating REEs insolubility. In contrast, sediment samples were found to be a good sink for REEs, with a higher mean ƩREEs recorded for the samples from the Moncalieri station (70.93 mg/kg). Notably, no significant differences in ƩREEs concentration were observed in the muscle tissue of fish samples from the three stations. The highest mean ƩREEs was recorded in the samples from the Murazzi station (0.027 mg/kg). The BSAF was very low, consistently below the unit, indicating an absence of bioaccumulation in fish muscle from sediment. In contrast, the BCF was high for several REEs, mainly for Sc and Y. While feeding ecology did not appear to affect REEs accumulation in muscle, there was a significant negative relationship between the trophic level and ΣREEs, indicating a trophic dilution of REEs from predator (Silurus glanis) to planktivorous (Alburnus arborella) fish. This study provides baseline concentrations, trophic transfers, and patterns of REEs in a river system. Further studies are needed to understand the transfer of REEs to other biotic components of lotic ecosystems.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2023 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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