Ocurrencia de contaminantes orgánicos persistentes e hidrocarburos aromáticos policíclicos en sedimentos del interior de la bahía del lago Titicaca (Puno, Perú)
Publicado 2020-01-22
Palabras clave
- Contaminantes,
- Cromatografía,
- Plaguicidas organoclorados,
- Riesgo ambiental
Derechos de autor 2020 Walter Alejandro Zamalloa Cuba, Valdemar Luiz Tornisielo, Franz Zirena Vilca
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Esta obra está bajo una licencia internacional Creative Commons Atribución 4.0.
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Resumen
El lago Titicaca es un importante recurso hídrico y de él depende el equilibrio ecológico de la meseta andina peruano-boliviana. En la actualidad, está siendo perturbada por las malas prácticas de gestión de los recursos hídricos, razón por la cual los contaminantes orgánicos persistentes (COP) y los hidrocarburos aromáticos policíclicos (HAP) fueron monitoreados en los sedimentos de 13 estaciones de muestreo en el interior de la bahía del Lago Titicaca (Puno, Perú). Las muestras fueron liofilizadas y almacenadas a -70°C para su posterior análisis. Para la validación del método analítico se consideraron los siguientes parámetros: recuperación, repetición e incertidumbre de todos los compuestos estudiados. Los COPs fueron determinados por cromatografía de gases acoplada a un detector de captura de electrones, y se detectó la presencia de β-BHC, 0.018 μg/g; o,p´-DDE, 0.0011 μg/g; dicofol 0.0065 μg/g y sulfato de endosulfán 0.0061 μg/g. Por otra parte, los HAP se determinaron mediante cromatografía líquida acoplada a un detector de fluorescencia, confirmando la presencia de naftalina, 0.058 μg/g; pireno, 0.039 μg/g; benzo(a)antraceno, 0.571 μg/g y criseno, 0.033 μg/g. La presencia de COPs y HAPs evidencia un riesgo ambiental para las especies que habitan el ecosistema de este lago.
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