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Los efectos de coalescencia y disolución de burbujas en la actividad sonoquímica en sistemas de ultrasonido de ondas
Marc C Nolan1, Haleigh A Fernandez2, Amanda N Cowen3
1Environmental Sciences Graduate Program, The Ohio State University, Columbus, OH 43210, USA; Department of Civil, Environmental, and Geodetic Engineering, The Ohio State University, Columbus, OH 43210, USA.
Ultrasonics sonochemistry
|February 21, 2026
Resumen
Ultrasonido de ondas pulsadas de ultrasonido.
Área de la Ciencia:
- Química Física es la química física.
- Ingeniería Química Ingeniería Química.
- Ciencias del medio ambiente Ciencias del medio ambiente.
Sus antecedentes:
- El ultrasonido de onda pulsada (PW) es un método potencial para la degradación de contaminantes.
- Los mecanismos subyacentes de la eficacia sonoquímica de PW no se comprenden completamente.
- Investigar la dinámica de burbujas es crucial para optimizar las aplicaciones de ultrasonido PW.
Objetivo del estudio:
- Para determinar la influencia de la coalescencia y la disolución de burbujas en la actividad sonoquímica en sistemas PW.
- Para comparar los efectos de la dinámica de burbujas en la ecografía PW y de onda continua (CW).
- Evaluar la calorimetría como un método libre de químicos para evaluar la cavitación.
Principales métodos:
- Se utilizó calorimetría, dosimetría de tereftalato (TA) y el método capilar.
- Se llevaron a cabo experimentos a 337 kHz con diferentes tiempos de encendido (10 y 100 ms) y tiempos de apagado.
- Se emplearon sulfonatos fluorotelómeros (FtS) de diferentes longitudes de cadena para estudiar los efectos de los tensioactivos.
Principales resultados:
- La actividad sonoquímica disminuyó con el aumento de los tiempos de inactividad, como lo indica la calorimetría y la fluorescencia HTA.
- La coalescencia de burbujas disminuyó con el aumento de los tiempos de inactividad, medidos por el método capilar.
- La disolución de burbujas, no la coalescencia, fue identificada como el principal factor que limita la eficiencia sonoquímica de PW.
Conclusiones:
- La disolución de burbujas es el factor dominante que limita la eficiencia sonoquímica en los sistemas de ultrasonido PW.
- Los tensioactivos afectan a la coalescencia de burbujas de manera similar en los sistemas CW y PW.
- La calorimetría es un dosímetro confiable y libre de productos químicos para la evaluación de la actividad de cavitación.
Palabras clave:
La coalescencia de las burbujas.La disolución de la burbuja de disolución.Calorimetría y calorimetría.Los sulfonatos del fluorotelómero son también sulfonatos del fluorotelómero.Ultrasonido de onda pulsada con ultrasonido de onda pulsada.La actividad sonoquímica es la actividad sonoquímica.
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