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Cavitation and Chemical Reactivity

  • Jean-Marc Lévêque
  • Giancarlo Cravotto
  • François Delattre
  • Pedro Cintas
Chapter
Part of the SpringerBriefs in Molecular Science book series (BRIEFSMOLECULAR)

Abstract

The sound is a mechanical vibration which propagates by elasticity through matter whatever its physical state. On liquid state, an interesting and unique physical phenomenon was identified at the end of nineteenth century and designated as cavitation, which is the birth, growth and collapse of tiny gas bubbles. The intensity of bubbles occurrence and of collapse violence is very dependent on the sound frequency. The most energetic cavitation activity occurs when using ultrasound frequencies, i.e. above the upper limit of human hearing (18 kHz). The incident irradiative frequency is therefore of crucial importance leading to effects on chemical systems of physical and/or chemical nature. Several other operational parameters do also greatly influence the cavitation process and are here described as well as most frequent types of ultrasonic devices working either on direct or indirect mode. ‘Hotspot’ theory and generally admitted reacting zones establishing rules of sonochemistry are also examined. Finally, some guidelines for good experimental use of ultrasonic devices are tentatively established by authors based on their own experience.

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Copyright information

© The Author(s), under exclusive licence to Springer Nature Switzerland AG 2018

Authors and Affiliations

  • Jean-Marc Lévêque
    • 1
  • Giancarlo Cravotto
    • 2
  • François Delattre
    • 3
  • Pedro Cintas
    • 4
  1. 1.LCME/SCeMUniversité de Savoie Mont BlancParisFrance
  2. 2.Dipartimento di Scienza e Tecnologia del FarmacoUniversitá di TorinoTurinItaly
  3. 3.Departement de ChimieUnité de Chimie Environnementale et Interactions sur le VivantDunkerqueFrance
  4. 4.Departamento Química Orgánica e Inorgánica, Facultad de CienciasUniversity of ExtremaduraBadajozSpain

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