Degradation of pentachlorophenol in aqueous solution by audible-frequency sonolytic ozonation

Zeng, Le; McKinley, James W.

doi:10.1016/j.jhazmat.2005.11.051

Cited by 23 publications

(12 citation statements)

References 29 publications

(52 reference statements)

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“…Because of the various advantages, such as optical and electronic properties, low cost, high photocatalytic activity, chemical stability and non-toxicity, TiO 2 has been widely used as a popular catalyst [5][6][7]. However, a critical drawback of titania is that it has a large band gap (3.2 eV), which is too large to allow efficient absorption of most sunlight.…”

Section: Introductionmentioning

confidence: 99%

Rapid photocatalytic degradation of PCP–Na over NaBiO3 driven by visible light irradiation

Chang¹,

Ji²,

Sui³

et al. 2009

Journal of Hazardous Materials

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Section: Introductionmentioning

confidence: 99%

Rapid photocatalytic degradation of PCP–Na over NaBiO3 driven by visible light irradiation

Chang¹,

Ji²,

Sui³

et al. 2009

Journal of Hazardous Materials

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“…Because of its chemical stability and low cost, titanium dioxide (TiO 2 ) is the most commonly used for this purpose. The TiO 2 photocatalysis has been constituted a promising technology for the treatment of wastewaters containing refractory organic compounds including PCP [8,[10][11][12][13]. Barbeni et al.…”

Section: Introductionmentioning

confidence: 99%

Application of a microbial toxicity assay for monitoring treatment effectiveness of pentachlorophenol in water using UV photolysis and TiO2 photocatalysis

Kim

Choi

Cho

et al. 2007

Journal of Hazardous Materials

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“…Despite a clear advantage of lowering the frequency to improve mechanical effects, extremely few works have tested audible frequencies [7], probably due to a lack of equipment connected to apprehension of noisy conditions.…”

Section: Sonochemical Engineering Issuesmentioning

confidence: 99%

Optimization of hydrostatic pressure at varied sonication conditions – power density, intensity, very low frequency – for isothermal ultrasonic sludge treatment

Delmas

Barthe

et al. 2015

Ultrasonics Sonochemistry

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This work aims at investigating for the first time the key sonication (US) parameters: power density (DUS), intensity (IUS), and frequency (FS) - down to audible range, under varied hydrostatic pressure (Ph) and low temperature isothermal conditions (to avoid any thermal effect). The selected application was activated sludge disintegration, a major industrial US process. For a rational approach all comparisons were made at same specific energy input (ES, US energy per solid weight) which is also the relevant economic criterion. The decoupling of power density and intensity was obtained by either changing the sludge volume or most often by changing probe diameter, all other characteristics being unchanged. Comprehensive results were obtained by varying the hydrostatic pressure at given power density and intensity. In all cases marked maxima of sludge disintegration appeared at optimum pressures, which values increased at increasing power intensity and density. Such optimum was expected due to opposite effects of increasing hydrostatic pressure: higher cavitation threshold then smaller and fewer bubbles, but higher temperature and pressure at the end of collapse. In addition the first attempt to lower US frequency down to audible range was very successful: at any operation condition (DUS, IUS, Ph, sludge concentration and type) higher sludge disintegration was obtained at 12 kHz than at 20 kHz. The same values of optimum pressure were observed at 12 and 20 kHz. At same energy consumption the best conditions - obtained at 12 kHz, maximum power density 720 W/L and 3.25 bar - provided about 100% improvement with respect to usual conditions (1 bar, 20 kHz). Important energy savings and equipment size reduction may then be expected.

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Degradation of pentachlorophenol in aqueous solution by audible-frequency sonolytic ozonation

Cited by 23 publications

References 29 publications

Rapid photocatalytic degradation of PCP–Na over NaBiO3 driven by visible light irradiation

Rapid photocatalytic degradation of PCP–Na over NaBiO3 driven by visible light irradiation

Application of a microbial toxicity assay for monitoring treatment effectiveness of pentachlorophenol in water using UV photolysis and TiO2 photocatalysis

Optimization of hydrostatic pressure at varied sonication conditions – power density, intensity, very low frequency – for isothermal ultrasonic sludge treatment

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