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Evaluation of UV LEDs Performance in Photochemical Oxidation of Phenol in the Presence of H2O2.

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Title: Evaluation of UV LEDs Performance in Photochemical Oxidation of Phenol in the Presence of H2O2.
Authors: Vilhunen, Sari1 sari.vilhunen@uku.fi, Rokhina, Ekaterina V.2 katja.rokhina@uku.fi, Virkutyte, Jurate3 jurate.virkutyte@uku.fi
Source: Journal of Environmental Engineering. Mar2010, Vol. 136 Issue 3, p274-280. 7p. 4 Charts, 3 Graphs.
Subjects: Phenol, Light emitting diodes, Ultraviolet radiation, Oxidation, Photochemical oxidants, Hydrogen peroxide
Abstract: A novel application of ultraviolet (UV) light emitting diodes (LEDs) as a light source for the degradation of organic contaminant has been investigated. Photocleaving of hydrogen peroxide (H2O2) via UV LEDs photolysis resulted in the generation of hydroxyl radicals. It was found that phenol removal was insignificant in the absence of hydrogen peroxide, therefore oxidation of phenol was attributed to the formed radicals. Two criteria were selected to provide detailed information on the performance of UV LEDs in phenol oxidation: (1) the reaction quantum efficiency and (2) the energy consumption. Statistical tools such as the response surface methodology and the ANOVA were applied to estimate the influence of various process parameters such as the wavelength (255, 269, and 276 nm) and H2O2 to phenol molar ratio (5, 50, and 100) on phenol degradation reaction quantum efficiency. The decay of phenol (initial concentration of 1.06 mM) was the most pronounced at 255 nm and H2O2 to phenol molar ratio of 50. Finally, the “figure-of-merit” was used to estimate the specific energy consumption of the UV LED-based process. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Environmental Engineering is the property of American Society of Civil Engineers and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Environmental+Engineering%22">Journal of Environmental Engineering</searchLink>. Mar2010, Vol. 136 Issue 3, p274-280. 7p. 4 Charts, 3 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Phenol%22">Phenol</searchLink><br /><searchLink fieldCode="DE" term="%22Light+emitting+diodes%22">Light emitting diodes</searchLink><br /><searchLink fieldCode="DE" term="%22Ultraviolet+radiation%22">Ultraviolet radiation</searchLink><br /><searchLink fieldCode="DE" term="%22Oxidation%22">Oxidation</searchLink><br /><searchLink fieldCode="DE" term="%22Photochemical+oxidants%22">Photochemical oxidants</searchLink><br /><searchLink fieldCode="DE" term="%22Hydrogen+peroxide%22">Hydrogen peroxide</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: A novel application of ultraviolet (UV) light emitting diodes (LEDs) as a light source for the degradation of organic contaminant has been investigated. Photocleaving of hydrogen peroxide (H2O2) via UV LEDs photolysis resulted in the generation of hydroxyl radicals. It was found that phenol removal was insignificant in the absence of hydrogen peroxide, therefore oxidation of phenol was attributed to the formed radicals. Two criteria were selected to provide detailed information on the performance of UV LEDs in phenol oxidation: (1) the reaction quantum efficiency and (2) the energy consumption. Statistical tools such as the response surface methodology and the ANOVA were applied to estimate the influence of various process parameters such as the wavelength (255, 269, and 276 nm) and H2O2 to phenol molar ratio (5, 50, and 100) on phenol degradation reaction quantum efficiency. The decay of phenol (initial concentration of 1.06 mM) was the most pronounced at 255 nm and H2O2 to phenol molar ratio of 50. Finally, the “figure-of-merit” was used to estimate the specific energy consumption of the UV LED-based process. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Journal of Environmental Engineering is the property of American Society of Civil Engineers and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1061/(ASCE)EE.1943-7870.0000152
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 7
        StartPage: 274
    Subjects:
      – SubjectFull: Phenol
        Type: general
      – SubjectFull: Light emitting diodes
        Type: general
      – SubjectFull: Ultraviolet radiation
        Type: general
      – SubjectFull: Oxidation
        Type: general
      – SubjectFull: Photochemical oxidants
        Type: general
      – SubjectFull: Hydrogen peroxide
        Type: general
    Titles:
      – TitleFull: Evaluation of UV LEDs Performance in Photochemical Oxidation of Phenol in the Presence of H2O2.
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            NameFull: Vilhunen, Sari
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            NameFull: Rokhina, Ekaterina V.
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            NameFull: Virkutyte, Jurate
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            – D: 01
              M: 03
              Text: Mar2010
              Type: published
              Y: 2010
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              Value: 136
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            – TitleFull: Journal of Environmental Engineering
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