AI Article Synopsis
- The study examines the effectiveness of acetylacetone (AA) as a photochemical agent for degrading contaminants, comparing its performance to hydrogen peroxide (HO) under various light sources such as low-pressure and medium-pressure mercury lamps, xenon lamps, and sunlight.
- AA outperformed HO in breaking down Acid Orange 7 across all light sources tested.
- The research also involved assessing the absorbed photon spectra using different filters, revealing that photonic efficiency varies based on the target compound, and introduced a new calculation method to better understand reaction mechanisms related to the inner filter effect.
Article Abstract
Light source is a crucial factor in the application of a photochemical process, which determines the energy efficiency. The performances of acetylacetone (AA) in conversion of aqueous contaminants under irradiation with a low-pressure mercury lamp, a medium-pressure mercury lamp, a xenon lamp, and natural sunlight were investigated and compared with those of HO as reference. In all cases, AA was superior to HO in the degradation of Acid Orange 7. Using combinations of the different light sources with various cut-off and band-pass filters, the spectra responses of the absorbed photons in the UV/AA and UV/HO processes were determined for two colored and two colorless compounds. The photonic efficiency (φ) of the two photochemical processes was found to be target-dependent. A calculation approach for the inner filter effect was developed by taking the obtained φ into account, which provides a more accurate indication of the reaction mechanisms.
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| http://dx.doi.org/10.1016/j.jhazmat.2017.04.011 | DOI Listing |
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