The degradation of organic dyes by corona discharge Page: 7 of 16
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O Control (without corona)
• With Corona Clscliargo
I 2 4 G B 10 12 M 1.0 IB 20 22 21 26 26 30
current. The rate of this increase was proportional to the
CUrThere was little or no reaction in the presence of helium,
a substantial reaction (faster than air) ln‘^ ?”s'7£® °e
oxygen, and no reaction in the presence of nitrogen <Iigure
5) The current between the electrodes (at 10 kV dc power
supplied) fluctuated wildly in the presence of helium, was
constant in the presence of oxygen, as well as in the
oresence of nitrogen, the current was ca . 15U |1A,
significantly higher than in air, at a constant voltage o
V Fluctuations in current coincided with the motion of
rte aqueous solution during stirring. An experiment with
0.15 1? NaCl in the methylene blue solution Indicated t
NaCl substantially slowed the bleaching reaction (Figure 5).
In the flasks in which solutions were exposed to corona,
water directly under the electrode was disturbed, even in the
absence of mechanical stirring. The disturbance appeared
Ukl a dimple, similar to the effect of blowing a small
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Goheen, S.C.; McCulloch, M.; Durham, D.E. & Heath, W.O. The degradation of organic dyes by corona discharge, article, February 1, 1992; Richland, Washington. (https://digital.library.unt.edu/ark:/67531/metadc1092124/m1/7/: accessed March 18, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.