Hannover 2020 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 10: Poster Session 2
P 10.20: Poster
Dienstag, 10. März 2020, 16:30–18:30, Empore Lichthof
Treatment of methylene blue solution with a cold atmospheric pressure plasma — •Nils Dose, Kerstin Sgonina, and Jan Benedikt — Institute of Experimental and Applied Physics, Kiel University, Kiel, Germany
Methylene blue solutions have previously been treated with different plasma sources resulting in its degradation due to following reactions. The degradation mechanism has also been investigated using dielectric barrier discharge showing that methylene blue reacts with various forms of oxygen like O3 and OH [1]. In addition, the effluent of a He/O2-plasma ignited in the COST-Jet has already been analysed with mass spectrometry to determine the density of atomic oxygen and ozone. In this work, the reaction of methylene blue with atomic oxygen and ozone is investigated.
An aqueous methylene blue solution was treated with the effluent of the COST-Jet, using a He/O2 gas mixture. By observing the degradation of methylene blue, the influence of different parameters was investigated. The O2 admixture as well as the distance between the plasma and the liquid were varied to see how O and O3 react with methylene blue while distinguishing both reactants. Additionally, the concentrations of methylene blue were used to observe the influence on the degradation.
[1] F. Huang et al., Chemical Engineering Journal 162.1 (2010)