Destruction of pollutants in water with ozone in combination with ultraviolet radiation.  3.  Photolysis of aqueous ozone

Peyton, Gary R.; Glaze, William H.

doi:10.1021/es00172a003

Cited by 342 publications

(130 citation statements)

References 22 publications

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“…If wavelengths lower than 300 nm are employed, photolysis of O 3 takes place, generating additional HO • and other oxidants, with the subsequent increase of the efficiency [64]:…”

Section: Ozonationmentioning

confidence: 99%

The combination of heterogeneous photocatalysis with chemical and physical operations: A tool for improving the photoprocess performance

Augugliaro

Litter

Palmisano

et al. 2006

Journal of Photochemistry and Photobiology C: Photochemistry Re

427

180

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Heterogeneous photocatalysis is a process of great potential for pollutant abatement and waste treatment. In order to improve the overall performance of the photoprocess, heterogeneous photocatalysis is being combined with physical or chemical operations, which affect the chemical kinetics and/or the overall efficiency. This review addresses the various possibilities to couple heterogeneous photocatalysis with other technologies to photodegrade organic and inorganic pollutants dissolved in actual or synthetic aqueous effluents. These combinations increase the photoprocess efficiency by decreasing the reaction time in respect to the separated operations or they decrease the cost in respect of heterogeneous photocatalysis alone, generally in terms of light energy. Depending on the operation coupled with heterogeneous photocatalysis, two categories of combinations exist. When the coupling is with ultrasonic irradiation, photo-Fenton reaction, ozonation, or electrochemical treatment, the combination affects the photocatalytic mechanisms thus improving the efficiency of the photocatalytic process. When the coupling is with biological treatment, membrane reactor, membrane photoreactor, or physical adsorption, the combination does not affect the photocatalytic mechanisms but it improves the efficiency of the overall process. The choice of the coupling is related to the type of wastewater to be treated. A synergistic effect, giving rise to an improvement of the efficiency of the photocatalytic process, has been reported in the literature for many cases.

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“…If wavelengths lower than 300 nm are employed, photolysis of O 3 takes place, generating additional HO • and other oxidants, with the subsequent increase of the efficiency [64]:…”

Section: Ozonationmentioning

confidence: 99%

The combination of heterogeneous photocatalysis with chemical and physical operations: A tool for improving the photoprocess performance

Augugliaro

Litter

Palmisano

et al. 2006

Journal of Photochemistry and Photobiology C: Photochemistry Re

427

180

View full text Add to dashboard Cite

show abstract

“…The photodecomposition of ozone leads to two hydroxyl radicals, which do not act as they recombine producing hydrogen peroxide, as shown in the following Eqns. (1) and (2) (Peyton & Glaze, 1988):…”

Section: Ozonation / Uvmentioning

confidence: 99%

Heterogeneous Photocatalytic Oxidation an Effective Tool for Wastewater Treatment – A Review

Kaan¹,

Aziz²,

Ibrahim³

et al. 2012

Studies on Water Management Issues

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“…Firstly, it increase the rate by removing the surface-trapped electrons, thereby lowering the electron-hole recombination rate and increasing the efficiency of hole utilization for reactions such as ( OH + h + OH). Secondly, H 2 O 2 may split photolytically to produce hydroxyl radicals ( OH) directly, as cited in studies of homogeneous photooxidation using UV / (H 2 O 2 + O 2 ) (Peyton and Glaze 1988). Thirdly, the solution phase may at times be oxygen starved, because of either oxygen consumption or slow oxygen mass transfer, and peroxide addition thereby increases the reaction rate.…”

Section: Effect Of Different Electron Acceptorsmentioning

confidence: 99%

Photocatalytic Degradation of Organic Pollutants: Mechanisms and Kinetics

Haque¹,

Bahnemann²,

Muneer³

2012

Organic Pollutants Ten Years After the Stockholm Convention - Environmental and Analytical Update

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Destruction of pollutants in water with ozone in combination with ultraviolet radiation. 3. Photolysis of aqueous ozone

Cited by 342 publications

References 22 publications

The combination of heterogeneous photocatalysis with chemical and physical operations: A tool for improving the photoprocess performance

The combination of heterogeneous photocatalysis with chemical and physical operations: A tool for improving the photoprocess performance

Heterogeneous Photocatalytic Oxidation an Effective Tool for Wastewater Treatment – A Review

Photocatalytic Degradation of Organic Pollutants: Mechanisms and Kinetics

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