Sonoluminescence of aqueous solutions

Sehgal, Chandra M.; Steer, Ronald P.; Sutherland, R. G.; Verrall, R. E.

doi:10.1021/j100541a008

Cited by 48 publications

(31 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Similar effects of alcohols [22,23] and carbon disulfide [24] on sonoluminescence from cavitation clouds of water have been observed. The decrease of the intensity of water MBSL upon addition of alcohols and other organic liquids to water was explained as a result of the quenching of the emission [23] or as a consequence of chemical reactions within the bubble [22,24]. This explanation can be true for SBSL as well.…”

supporting

confidence: 70%

Multibubble Sonoluminescence Spectra of Water which Resemble Single-Bubble Sonoluminescence

Didenko

Gordeychuk

2000

Phys. Rev. Lett.

View full text Add to dashboard Cite

Multibubble sonoluminescence (MBSL) spectra of water from cavitation clouds were collected in the presence of different noble gases and at different acoustic intensities. Results show that at high acoustic intensity and with xenon as a dissolved gas the emission of the OH* radical becomes indiscernible from the continuum. These spectra resemble single-bubble sonoluminescence (SBSL) spectra. It is concluded that the source of emission in MBSL and SBSL can be the same, the difference in spectra is due to the higher temperature inside the bubble during SBSL.

show abstract

supporting

confidence: 70%

Multibubble Sonoluminescence Spectra of Water which Resemble Single-Bubble Sonoluminescence

Didenko

Gordeychuk

2000

Phys. Rev. Lett.

View full text Add to dashboard Cite

show abstract

“…Experimental values of P = 313 atmospheres and T = 3,360 o K have been reported [Sehgal et al, 1977] for aqueous systems, while temperatures in excess of 5,000 o K have been reported Suslick, 1989, 1991;Suslick et al, 1986] for cavitation of organic and polymeric liquids. Recent experimental results on the phenomenon of sonoluminescence [Crum and Roy, 1994;Crum 1994] suggest that even more extreme temperatures and pressures are obtained during cavitational bubble collapse [Putterman, 1995].…”

Section: Physical and Chemical Principles --Ultrasoundmentioning

confidence: 98%

Use of Sonication for in-Well Softening of Semivolatile Organic Compounds

Peters

2000

View full text Add to dashboard Cite

EXECUTIVE SUMMARYThis project investigates the in-situ degradation of semivolatile organic compounds (SVOCs) and volatile organic compounds (VOCs) using in-well sonication, in-well vapor stripping, and bioremediation. Pretreating groundwaters with sonication techniques in-situ would form VOCs that can be effectively removed by in-well vapor stripping and bioremediation. The mechanistic studies focus on the coupling of megasonics and ultrasonics to "soften" (i.e., partially degrade) the SVOCs; oxidative reaction mechanism studies; surface corrosion studies (on the reactor walls/well); enhancement due to addition of oxidants, quantification of the hydroxyl radical formation; identification/quantification of degradation products; volatility/degradability of the treated waters; development of a computer simulation model to describe combined in-well sonication/in-well vapor stripping/bioremediation; systems analysis/economic analysis; large laboratory-scale experiment verification; and field demonstration of the integrated technology. Benefits of this approach include: (1) Remediation is performed in-situ; (2) The treatment systems complement each other; their combination can drastically reduce or remove SVOCs and VOCs; (3) Ability to convert hard-to-degrade organics into more volatile organic compounds; (4) Ability to remove residual VOCs and "softened" SVOCs through the combined action of in-well vapor stripping and biodegradation; (5) Does not require handling or disposing of water at the ground surface; and (6) Cost-effective and improved efficiency, resulting in shortened clean-up times to remediate a site.This study examined the ability of an integrated treatment system involving combined sonication and vapor stripping to remove/destroy chlorinated organic compounds from groundwater.The chlorinated solvents studied included carbon tetrachloride (CCl 4 ), trichloroethylene (TCE), trichlorethane (TCA), and tetrachloroethylene (PCE). Contaminant concentrations studied ranged from ~1 to ~100 mg/L. Sonication/vapor stripping experiments were performed in a reactor used to treat the chlorinated organic contaminants in groundwater employing sonication alone, vapor stripping alone, and combined sonication/vapor stripping. The sonicator has an ultrasonic frequency of 20-kHz; the applied power intensity was 12.3-, 25.3-, and 35.8-W/cm 2 . The batch reactions were operated normally for up to 10 minutes treatment time, with samples drawn for GC analysis every 2 minutes. Air injection rates (for the vapor stripping) were nominally 0-(sonication alone), 500-, 1000-, and 1500-mL/min. In the continuous flow studies, the residence time in the reactor was set at 5, 8, and 10 minutes.Results were obtained from batch experiments performed on the various chlorinated organic contaminants (CCl 4 , TCE, TCA, and PCE) using sonication alone, vapor stripping alone, and combined sonication/vapor stripping. For all four chlorinated solvent species, the first order rate constants were in the range of 0.02 to 0.06 min -1 , 0.23 to 0.53 min ...

show abstract

“…[139] and Sehgal et cd. [140] showed a spectral peak at 310 nm, superimposed on a continuum extending from 240 nm to the far infra-red. These features are dependent on the insonation frequency [141].…”

Section: (I) the Spectrum Of Sonoluminescencementioning

confidence: 99%

Effects and Mechanisms

Leighton

1994

The Acoustic Bubble

View full text Add to dashboard Cite

Sonoluminescence of aqueous solutions

Cited by 48 publications

References 2 publications

Multibubble Sonoluminescence Spectra of Water which Resemble Single-Bubble Sonoluminescence

Multibubble Sonoluminescence Spectra of Water which Resemble Single-Bubble Sonoluminescence

Use of Sonication for in-Well Softening of Semivolatile Organic Compounds

Effects and Mechanisms

Contact Info

Product

Resources

About