Evaluación ecotoxicológica de sedimentos en una zona del Río Uruguay, con puntos finales indicadores de toxicidad aguda, sub-letal, crónica, reproductiva y teratogénica

Authors

  • Diana Míguez Caramés Departamento de Aguas y Productos Químicos, Laboratorio Tecnológico del Uruguay (LATU), Uruguay http://orcid.org/0000-0001-5364-5951
  • María Victoria Carrara Departamento de Aguas y Productos Químicos, Laboratorio Tecnológico del Uruguay (LATU), Uruguay
  • Agustín Carnikián Departamento de Aguas y Productos Químicos, Laboratorio Tecnológico del Uruguay (LATU), Uruguay
  • Karen Keel Departamento de Aguas y Productos Químicos, Laboratorio Tecnológico del Uruguay (LATU), Uruguay
  • Agustina Aizpún Departamento de Aguas y Productos Químicos, Laboratorio Tecnológico del Uruguay (LATU), Uruguay
  • María Elena Bouvier Departemento de Aguas, Unidad Fray Bentos, Laboratorio Tecnológico del Uruguay (LATU), Parque Industrial, Barrio Anglo, Fray Bentos, Río Negro , Uruguay
  • Elise Cartmell School of Applied science, Cranfield University, Cranfield, Bedfordshire, United Kingdom
  • Ignacio Seoane Departamento Aguas y Productos Químicos. Laboratorio Tecnológico del Uruguay, LATU. Uruguay

DOI:

https://doi.org/10.26461/05.01

Abstract

The aim of this work was to characterize the sediment toxicity of a zone of the River Uruguay through a battery of bioassays. The samples were extracted from an area of influence of domestic wastewater discharges and pulp mill effluents (Fray Bentos), a touristic town downstream (Las Cañas), and another one, upstream, isolated from those discharges (Nuevo Berlín). The bioassays: Photobacterium leiognathi toxicity screen, Ceriodaphnia dubia reproduction and embryo-larval teratogenicity and lethality with Pimephales promelas were applied to the sediment elutriates, while the Hyalella curvispina sub-lethal growth test was performed using whole sediment. To assess bioavailability and toxicity pathways, the sediment-water partitioning of 2,4,5-triclorofenol among phases was determined as: 63% dissolved, 27% suspended and the rest settled. Toxicity to organics and metals using P. leioghnati was observed in all sampled sites. The frequency of P. promelas vertebral malformations was 3.3% only to Fray Bentos elutriate, but the C. dubia reproduction bioassay showed effects only in those from Nuevo Berlín and Las Cañas. The growth test with H. curvispina evidenced effects for all samples. The toxicity pathways could be ingestion of dissolved and particulate contaminants, possibly associated to higher clay and silt contents and contaminant input. The cause-effect relationships will be subject to further research.        

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How to Cite

Míguez Caramés, D., Carrara, M. V., Carnikián, A., Keel, K., Aizpún, A., Bouvier, M. E., Cartmell, E., & Seoane, I. (2011). Evaluación ecotoxicológica de sedimentos en una zona del Río Uruguay, con puntos finales indicadores de toxicidad aguda, sub-letal, crónica, reproductiva y teratogénica. INNOTEC, (5 ene-dic), 3–10. https://doi.org/10.26461/05.01

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