Vol. 22 Núm. 1 (2020)
Artículo original

Ocurrencia de contaminantes orgánicos persistentes e hidrocarburos aromáticos policíclicos en sedimentos del interior de la bahía del lago Titicaca (Puno, Perú)

Walter Alejandro Zamalloa Cuba
Escuela Profesional de Ingeniería Química, Universidad Nacional del Altiplano de Puno, Perú
Valdemar Luis Tornisielo
Centro de Energía Nuclear na Agricultura, Laboratorio de Ecotoxicologia, Piracicaba, Brasil
Franz Zirena Vilca
Universidad Nacional de Moquegua, Ilo, Perú

Publicado 2020-01-22

Palabras clave

  • Contaminantes,
  • Cromatografía,
  • Plaguicidas organoclorados,
  • Riesgo ambiental

Cómo citar

Zamalloa Cuba, W. A. ., Tornisielo, V. L., & Zirena Vilca, F. (2020). Ocurrencia de contaminantes orgánicos persistentes e hidrocarburos aromáticos policíclicos en sedimentos del interior de la bahía del lago Titicaca (Puno, Perú). Revista De Investigaciones Altoandinas, 22(1), 34–44. https://doi.org/10.18271/ria.2020.531

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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