Sonoluminescence quenching in aqueous solutions containing weak organic acids and bases and its relevance to sonochemistry

Article Abstract:

The multibubble sonoluminescence from water was found to be quenched by the addition of low levels of unsubstituted or 2-chlore-substituted aliphatic carboxylic acids and the aromatic solutes, phenol and aniline. The sonoluminescene intensity could be resorted to the level obtained in pure water by adjusting the solution pH to a point where the solutes were completely in their ionized form.

Usage, Electric properties, Organic acids, Acetohydroxamic acid

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Sonoluminescence emission from aqueous solutions of organic monomers

Article Abstract:

The quenching of multibubble sonoluminescence, MBSL, by seven organic monomers in aqueous solution using ultrasound at two frequencies is reported. The results at 515 kHz closely parallel those reported for other simple organic compounds in solution. However, at 20 kHz, significant differences from those at the higher frequency are observed with lower degrees of quencing.

All Other Basic Organic Chemical Manufacturing, Vinyl Chloride Monomer, Monomers, Properties

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Sonochemical degradation of a polydisperse nonylphenol ethoxylate in aqueous solution

Article Abstract:

Nonionic surfactants such as nonylphenol ethoxylates can be effectively degraded and mineralized / pyrolyzed using ultrasound. The degradation process occurs initially at the bubble/solution interface by thermal and radical reactions and subsequently via pyrolysis.

Surface active agents, Surface Active Agent Manufacturing, Nonionic Surfactants, Observations, Thermal properties, Decomposition (Chemistry)

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