Gas-Phase Advanced Oxidation (GPAO) for Gas Containing Benzene Series by Ultraviolet Irradiation/Hydrogen Peroxide Vapour (UV/[H2O2]g) Process

doi:10.21203/rs.3.rs-218136/v1

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Research Article

Gas-Phase Advanced Oxidation (GPAO) for Gas Containing Benzene Series by Ultraviolet Irradiation/Hydrogen Peroxide Vapour (UV/[H₂O₂]_g) Process

https://doi.org/10.21203/rs.3.rs-218136/v1

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Journal Publication

published 14 Oct, 2021

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Hydrogen peroxide (H₂O₂) has the remarkable characteristics of strong oxidation, in which its vapour ([H₂O₂]_g)has further advantages, such as economize and good light transmission. But there is very rare research about its degradation effect in Gas-Phase Advanced Oxidation (GPAO). In the present study, the photochemical oxidation for gas containing benzene series, using ultraviolet (UV) irradiation and [H₂O₂]_g, was investigated in a transparent bag made of fluorinated ethylene propylene (FEP). Only UV or [H₂O₂]_g hardly reduced the pollutant in 5 hours in which the reactor was also stable. With the high pollutant concentration (248 to 756 mg/m³) and short residence time (3S) compared with the related studies, studying the degradation of benzene, toluene and xylene, the apparent rate by UV/[H₂O₂]_g/(powder active carbon, PAC) was higher compared with the different way (UV/[H₂O₂]_g, UV/[H₂O₂]_g/TiO₂ and UV/[H₂O₂]_g/ZnO), but it was found that the terminal degradation by UV/[H₂O₂]_g significantly decreased, in which the conductivity decreased after reaction. The effects of increasing pollutant concentration and H₂O₂ pH were negative for the treament, but the UV radiated power positive till 40W. In addition, the characteristic absorbance for three benzene series showed that the key structure of pollutant molecule were damaged in GPAO.