DE LA LIMPIEZA A LA CONTAMINACIÓN

INVESTIGANDO LA TOXICIDAD DE UN DETERGENTE COMERCIAL UTILIZANDO ARTEMIA SALINA L. COMO ORGANISMO MODELO

  • Leonardo Mendes da Silva Universidade Federal de Lavras
  • Fábio Júnio da Silva Instituto Federal de Educação, Ciência e Tecnologia do Sudeste de Minas Gerais - Campus Barbacena
Palabras clave: Ecosistemas acuáticos, Riesgo Ambiental, Surfactantes, Contaminación del agua

Resumen

Los detergentes son ampliamente utilizados en industrias y hogares para limpiar superficies y objetos. Sin embargo, después de su uso, la espuma de este compuesto a menudo contamina los ecosistemas acuáticos, lo que puede desencadenar problemas como la eutrofización y la reducción de los niveles de oxígeno disponible. En este estudio, se evaluó el potencial tóxico de un detergente comercial biodegradable sobre el microcrustáceo Artemia salina. Se prepararon seis concentraciones diferentes del detergente (2,98; 9,54; 30,52; 97,66; 312,5; y 1000 µg/mL-1) mediante dilución en agua de mar artificial. La prueba de toxicidad siguió los protocolos de la norma NBR 16530. Los nauplios de A. salina recién eclosionados fueron expuestos a las diferentes concentraciones durante un período de 24 horas. Después de este período, se evaluaron la tasa de mortalidad y la concentración letal media (LC50). Los resultados demostraron que el detergente comercial causó una mortalidad significativa a partir de una concentración de 30,52 µg/mL-1, lo que resultó en un 47,50% de muertes. En las concentraciones de 312,5 y 1000 µg/mL-1, se observó un 100% de mortalidad. La LC50 después de 24 horas de exposición se calculó en 35,04 µg/mL-1, lo que indica que el detergente es altamente tóxico para A. salina, a pesar de su biodegradabilidad.

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Publicado
2023-10-24