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Hidratación de cemento modificado con hierro que regula la transformación de la materia orgánica disuelta y la
Qiao Li1, Yipeng Wang1, Jiuxian Yang1
1Power China of Chengdu Engineering Corporation Limited, Chengdu, 611130, China.
Environmental research
|February 26, 2026
Resumen
La adición de hierro al hormigón vegetado (VC) mejora su resistencia y reduce la pérdida de carbono del suelo. Esta enmienda de hierro ayuda a retener la materia orgánica disuelta (DOM) y mejora el crecimiento de las plantas en los sistemas de VC.
Área de la Ciencia:
- Ingeniería Ambiental
- Ciencias del Suelo
- Ciencia de Materiales
Sus antecedentes:
- Los taludes de ingeniería pueden perder carbono del suelo a través de la escorrentía de lluvia, contaminando el agua.
- La alcalinidad del hormigón vegetado (VC) afecta la estructura del suelo y la liberación de materia orgánica disuelta (DOM).
- El papel de la incorporación de hierro (Fe3+) en los procesos acoplados del VC no está claro.
Objetivo del estudio:
- Investigar los efectos de la adición de Fe en el rendimiento mecánico, la alcalinidad y el comportamiento de la DOM del VC.
- Aclarar los mecanismos moleculares de la interacción del Fe con la DOM en el VC.
- Evaluar el impacto del Fe en el establecimiento de la vegetación en el VC.
Principales métodos:
- Curado controlado y simulaciones de lluvia de VC con y sin Fe2(SO4)3.
- Análisis mediante espectroscopía de matriz de excitación-emisión con análisis factorial paralelo (EEM-PARAFAC).
- Caracterización molecular mediante espectrometría de masas de resonancia ciclotrónica iónica de transformada de Fourier (FT-ICR-MS).
Principales resultados:
- La adición de Fe mejoró la resistencia a la compresión y al cizallamiento del VC y redujo la alcalinidad.
- La simulación de lluvia mostró una reducción de más del 42% en la liberación de carbono orgánico disuelto (DOC) del VC enmendado con Fe.
- Los óxidos/hidróxidos de Fe inmovilizaron la materia orgánica disuelta aromática a través de la complejación superficial y el intercambio de ligandos, reduciendo la lixiviación de N y S.
Conclusiones:
- La incorporación de Fe optimiza la estabilidad mecánica y la alcalinidad del VC.
- La enmienda de Fe mejora significativamente la estabilización del carbono orgánico del suelo al retener la DOM.
- El VC enmendado con Fe apoya un mejor rendimiento de la vegetación bajo una alcalinidad moderada.
Palabras clave:
Solidificación de cementoProtección ecológica de taludesMateria orgánica del sueloHormigón vegetadoMás Videos Relacionados
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