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Plasma treatment of aqueous solutes: some chemical properties of a gliding arc in humid air

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Fig. 1. Plasma neutralization of 125 mL of 5mM NaOH so- so-lutions. The pH of the solution depends on the exposure time to the plasma
Figure 2 shows that t eq is directly correlated with Φ 2 (i.e., t eq = 4.1386 × Φ 2 − 1.324 with r 2 = 0.999) in the investigated Φ range (i.e., 0.99 < Φ(mm) < 2)
Fig. 3. Influence of the gas flow: t eq vs. Q − 1 (experimental conditions: Φ = 2 mm; d = 77 mm; e = 4 mm).
Fig. 6. Evolution with the exposure time t(min − 1 ) to the plasma of the absorbance of a 0.1 mM hexacyanoferrate (II) solution at the absorption peak of the oxidized complex.
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