Atmospheric Plasma-catalytic Treatment Of Methyl Orange
Résumé: Atmospheric gliding arc discharges in humid air are used for the treatment of M e- thyl Orange (MO) solutions for depollution purposes. Highly reactive neutral hydroxyl rad i- cals OH and NO are produced in the plasma. Their interaction with the solution is invest i- gated using UV/Visible spectroscopy . The plasma treatment shows the creation of interm e- diate species syst ematically followed by their degradation leading to one end product. The presence of hydrogen peroxide (H 2 O 2 ) and titanium oxide (TiO 2 ) as catalyst s differently i n- fluences the plasma treatment of the MO solution. H 2 O 2 influences further the direct chemical reactions due its straightforward decomposition under UV radiations while TiO 2 has to be a c- tivated before releas ing species that contribut e to the highly oxidant HO radicals production .
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