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El ángulo de intrusión del agua de mar controla la migración del cromo coloidal a través de las interfaces de las
Yaqiang Wei1, Jiao Zhang1, Yuling Chen1
1School of Environmental and Chemical Engineering, Shanghai University, Shanghai 200444, China.
Journal of hazardous materials
|September 6, 2025
Resumen
El ángulo de intrusión del agua de mar tiene un impacto crítico en el transporte de contaminantes en las zonas costeras. Un ángulo de 45° promueve la migración de cromo al océano, lo que afecta la calidad del agua y las evaluaciones del riesgo de contaminación.
Área de la Ciencia:
- Ciencias del medio ambiente
- Hidrogeología
- Geoquímica
Sus antecedentes:
- Las zonas costeras de mezcla son vitales para el intercambio de contaminantes.
- El efecto del ángulo de intrusión del agua de mar en el transporte de contaminantes es poco estudiado.
- El cromo (Cr) es un contaminante costero significativo, a menudo transportado por coloides.
Objetivo del estudio:
- Investigar la influencia de los ángulos de intrusión del agua de mar en la migración del cromo.
- Analizar el papel de las formas coloidales en el transporte del cromo.
- Comprender las implicaciones para la calidad y la contaminación del agua costera.
Principales métodos:
- Experimentos en columnas de laboratorio que simulan la intrusión de agua de mar.
- Modelado de transporte reactivo para simular la dinámica de los contaminantes.
- Análisis de las concentraciones de cromo y coloides bajo diferentes ángulos de intrusión.
Principales resultados:
- Un ángulo de intrusión de agua de mar de 45° aumentó significativamente la migración hacia abajo del cromo coloidal (III) (3,88 mg/L).
- Este ángulo redujo las concentraciones de cromo y coloides en la descarga submarina de aguas subterráneas (SGD), lo que indica una menor exportación cerca de la costa.
- Los ángulos más pronunciados facilitaron la migración del Cr disuelto y crearon una "ventana de ruptura" para que el Cr coloidal alcanzara las capas oceánicas más profundas.
Conclusiones:
- El ángulo de intrusión del agua de mar es un factor crucial y pasado por alto en la dinámica de los contaminantes costeros.
- Los resultados permiten mejorar la gestión de la calidad de las aguas costeras y las evaluaciones del riesgo de contaminación.
- Los resultados subrayan la necesidad de considerar la geometría de intrusión para mitigar el transporte de contaminantes.
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