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El carbono orgánico facilita la liberación de fósforo orgánico mediante la conversión del fósforo orgánico estable en

Yan Wang¹, Xiang Chen¹, Cai Li²

¹Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, China.

Journal of environmental sciences (China)

|August 21, 2025

Resumen

La liberación de fósforo orgánico (PO) en los sedimentos de los lagos está relacionada con las formas de carbono orgánico (CO). La degradación de OC derivada de las algas durante la floración puede movilizar la OP, lo que afecta el ciclo del fósforo en los lagos eutróficos.

Área de la Ciencia:

Química del medio ambiente
Limnología
Biogeoquímica

Sus antecedentes:

El fósforo orgánico (PO) es un componente clave del fósforo en los sedimentos de los lagos.
La movilidad del OP está significativamente influenciada por la mineralización y la transformación del carbono orgánico (CO).
La comprensión de la interacción entre las fracciones de OC y la liberación de OP es crucial para la gestión de lagos eutróficos.

Objetivo del estudio:

Investigar el impacto de las diferentes fracciones de carbono orgánico (CO) en la liberación de fósforo orgánico (FO) en los sedimentos de los lagos.
Determinar las variaciones estacionales y espaciales de las formas químicas OP y OC en el lago Taihu.
Establecer correlaciones entre las fracciones específicas de OP y OC.

Principales métodos:

Muestreo estacional de los sedimentos del lago Taihu.
Determinación de las formas químicas de OP y OC.
Análisis estadístico de la correlación entre las fracciones OP y OC.

Principales resultados:

Las concentraciones totales de OP y OC variaron estacionalmente y espacialmente, en un rango de 133 a 348 mg/kg y de 4,77 a 21,19 mg/kg, respectivamente.
El OP extraído con NaOH, el OP ligado al ácido fúlvico y el OP ligado al ácido húmico mostraron correlaciones positivas con el CO húmico y el CO por hidrólisis en caliente.
La evidencia sugiere que la degradación de OC derivada de las algas mejora la mineralización de OP en condiciones de floración cianobacteriana.

Conclusiones:

La degradación y mineralización de la OC derivada de las algas puede acelerar la mineralización de la OP.
Este proceso puede transformar la OP estable o moderadamente activa en formas más activas o en fósforo inorgánico.
Los hallazgos proporcionan información sobre la transformación del PO después de la degradación cianobacteriana en los ecosistemas de lagos eutróficos.

Palabras clave:

Fósforo orgánico activo Sedimentos de eutrofización Mineralización Carbono orgánico El sedimento

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