Please use this identifier to cite or link to this item: https://physrep.ff.bg.ac.rs/handle/123456789/479
Title: Comparison of liquid and liquid-gas phase plasma reactors for discoloration of azo dyes: Analysis of degradation products
Authors: Kozakova, Zdenka
Klimova, Edita J.
Obradović, Bratislav 
Dojcinovic, Biljana P.
Krcma, Frantisek
Kuraica, Milorad 
Olejnickova, Zuzana
Sykora, Richard
Vavrova, Milada
Keywords: azo textile dyes;DC discharges;dielectric barrier discharges;discoloration;HPLC-MS analyses
Issue Date: 1-Jun-2018
Journal: Plasma Processes and Polymers
Abstract: 
Three plasma systems are used for decomposition of two organic textile dyes. The highest discoloration efficiency over 90% is reached in the water falling film DBD when maximal energy of 270 and 450 kJ L−1 is applied into Reactive Yellow 125 and Direct Red 79 dye solutions, respectively. Decomposition of the dye molecules is confirmed by concentration decreases in dye chromatograms. Similar degradation products are identified in the positive diaphragm discharge and water falling film DBD. In the negative diaphragm discharge, different products are formed due to electrochemical reactions on the anode. Substitution of halogens, hydrogen addition on the azo group and the cleavage of the azo group itself are the main mechanisms contributing to the destruction of the dye molecule in the compared plasma systems.
URI: https://physrep.ff.bg.ac.rs/handle/123456789/479
ISSN: 1612-8850
DOI: 10.1002/ppap.201700178
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