Résumé:
Gliding arc discharge (GAD) reactors are continuously in progress in order to improve the treatment
efficiency of recalcitrant compounds. However, up to now, they remain difficult to transfer to industrial
applications because of some technical constraints in their design. In this study, a new efficient prototype
is proposed for the treatment of gravity falling film shaped of liquid effluents. The liquid flow
rate is now continuous as the tank containing the solution to be treated is replaced by an inclined plate
along which flows the liquid. The various working parameters are optimized and the new prototype
efficiency is tested on discolouration and degradation of the anthraquinonique Acid Green 25. The optimized
values obtained are: the liquid flow rate ω = 1 L h−1, the plate tilt angle ˛ = 45◦ and the channel
width = 3 mm. The rates of discolouration and degradation reach 95% and 90% respectively after 12
cycles (180 min) of plasma exposition. The GAD in the presence of humid air generates highly oxidizing
radical species such as •OH with a standard potential E◦[(•OH/H2O) = 2.85 V/SHE] and its reducer agent
H2O2 [E◦(H2O2/H2O) = 1.68 V/SHE.
