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Transformaciones oxidativas de hidrocarburos aromáticos policíclicos adsorbidos en las cenizas volantes de carbón

W A Korfmacher, D F Natusch, D R Taylor

Science (New York, N.Y.)

|February 15, 1980

Resumen

Los hidrocarburos aromáticos policíclicos adsorbidos en las cenizas volantes de carbón resisten la descomposición inducida por la luz. Sin embargo, algunos compuestos pueden oxidar espontáneamente sin luz, dependiendo del tipo de ceniza volante.

Área de la Ciencia:

Química del medio ambiente Química del medio ambiente
Ciencia de los materiales Ciencia de los materiales.

Sus antecedentes:

Los hidrocarburos aromáticos policíclicos (HAP) son contaminantes orgánicos persistentes. también conocidos como HAPs.
La ceniza volante de carbón es un subproducto industrial común con propiedades adsorbentes.

Objetivo del estudio:

Para investigar la estabilidad de los HAP adsorbidos en las cenizas volantes de carbón.
Para determinar la susceptibilidad de los HAP adsorbidos a la fotodegradación y la oxidación espontánea.

Principales métodos:

Adsorción de HAP en varias muestras de cenizas volantes de carbón.
Exposición a la luz solar simulada para evaluar la descomposición fotoquímica.
Monitoreo de la oxidación de HAP en ausencia de luz.

Principales resultados:

Los HAP adsorbidos en las cenizas volantes de carbón mostraron una mayor estabilidad contra la descomposición fotoquímica.
La oxidación espontánea de ciertos HAP se produjo en la oscuridad.
Los compuestos con un carbono bencílico fueron particularmente propensos a la oxidación.
La velocidad de descomposición fue influenciada por el tipo específico de ceniza volante de carbón.

Conclusiones:

Las cenizas volantes de carbón proporcionan un efecto estabilizador sobre los HAP adsorbidos contra la fotodegradación.
La oxidación espontánea es una vía de degradación significativa para HAP específicos en las cenizas volantes.
Las características de las cenizas volantes juegan un papel crucial en el destino ambiental de los HAP adsorbidos.

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