Evaluación de las concentraciones totales de selenio en agua, sedimento y tejidos de peces del río Catatumbo, Venezuela durante los años 2001-2002
Year: 2021
Type: article
Abstract: The Catatumbo river bi-nacional basin, shared by Venezuelan and Colombian republics in percentages of 70% and 30% respectively, is a water body of vital importance for Lake Maracaibo, because it supplies 60% of the fresh water. The diverse agricultural and industrial activities developed onVenezuelan and Colombian republics, contributes to the contamination process of this water reservoir. Through this study were evaluated the concentration level of selenium in water, sediment and fish muscle tissuefrom the Catatumbo River and tributaries. During the sampling period from January to November 2001-2002, 48 water, 24 sediment and 87 fish samples were collected. The sequential extraction procedure achieved by the BCR was used in order to determine the selenium in sediment samples. Physicochemical parameters were also measured. The minimum-maximum values in the Catatumbo river and tributaries were: (water) flow 6.61-2701.46 m3.s-1, pH 5.99-7.97, dissolved oxygen 3.82-7.29 mg.L-1, conductivity 14.33-296.00 µhom.cm-1, temperature 24.17-30.98 oC and Se 0.31-1.33 µg.L-1; (sediment) Se 0.14-0.59 µg.g-1 and tissue muscle fish Se <0.54-4.80 µg.g-1. Results indicated that Catatumbo river and tributary station closer to Lake Maracaibo presented the highest values Se.
Authors: Julio Torres, Marinela Colina, Miriam Sanquiz, Hendrick Avila, Sandra Barrera, Yulixis Cano, José Morales, Zulay Rivas
Institutions: Universidad Técnica de Manabí, Universidad del Zulia
Language: Spanish
Subfield: Health, Toxicology and Mutagenesis
Field: Environmental Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4238265669