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Determinación del potencial de acumulación de los nanoplásticos en los cultivos: una investigación de los

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Este estudio muestra que los nanoplásticos de poliestireno (PS NPs) pueden entrar en las plantas de rábano a través de sus raíces y moverse a los tejidos comestibles. Esto pone de relieve una posible preocupación por la seguridad alimentaria derivada de la contaminación por nanoplásticos en los cultivos.

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Área de la Ciencia:

  • Ciencias del medio ambiente
  • Seguridad de los alimentos
  • Biología vegetal

Sus antecedentes:

  • La acumulación de nanoplásticos en los cultivos es poco conocida debido a limitaciones analíticas.
  • Los nanoplásticos de poliestireno (PSNP) son contaminantes ambientales comunes.

Objetivo del estudio:

  • Investigar la absorción y la translocación de PSNP en el rábano (Raphanus sativus).
  • Evaluar el potencial de acumulación de nanoplásticos en las partes comestibles de las plantas.

Principales métodos:

  • Se utilizó el radiomarcado (14 C-PS NPs) para rastrear el movimiento de nanoplásticos.
  • Exposición hidropónica de los rábanos a 14 PN C-PS durante cinco días.
  • Cuantificación de la acumulación de nanoplásticos en raíces sin carne, raíces carnosas y brotes.

Principales resultados:

  • Las raíces de rábano retenían casi el 5% de los 14 NP C-PS.
  • Se detectaron 14 NPs de C-PS en raíces carnosas comestibles (∼25%) y brotes (∼10%).
  • La distribución de los nanoplásticos siguió la tendencia: raíz no carnosa > raíz carnosa > brotes.

Conclusiones:

  • Los nanoplásticos de poliestireno pueden trasladarse a tejidos vegetales comestibles, cruzando la franja de Casparian.
  • La ingestión de nanoplásticos por los cultivos presenta una posible vía de exposición humana.
  • Se necesita más investigación para abordar este problema emergente de seguridad alimentaria.