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
.
