Decomposition of Methylene Blue in Water by Corona Discharges

The decomposition of methylene blue (MB) in aqueous solution was investigated using a pulsed corona discharge. The discharge was ignited in the gas bubbled in the solution through several needle electrodes. The influence of treatment time, volume of the treated solution and initial concentration of...

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Bibliographic Details
Published in:Plasma chemistry and plasma processing Vol. 28; no. 6; pp. 677 - 688
Main Authors: Magureanu, Monica, Piroi, Daniela, Gherendi, Florin, Mandache, Nicolae Bogdan, Parvulescu, Vasile
Format: Journal Article
Language:English
Published: Boston Springer US 01.12.2008
Subjects:
Argon
Characterization and Evaluation of Materials
Chemistry
Chemistry and Materials Science
Classical Mechanics
Conversion
Coronas
Decomposition
Discharge
Dyes
Electrodes
Inorganic Chemistry
Mechanical Engineering
Methylene blue
Original Paper
Degradation
Corona discharges
Plasma treatment
Methylene blue
ISSN:0272-4324, 1572-8986
Online Access:Get full text
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Summary:The decomposition of methylene blue (MB) in aqueous solution was investigated using a pulsed corona discharge. The discharge was ignited in the gas bubbled in the solution through several needle electrodes. The influence of treatment time, volume of the treated solution and initial concentration of the dye in solution on MB degradation was studied. The effect of the nature of the gas introduced was also investigated. For the same energy input, MB conversion increased in the order air < argon < oxygen. When using oxygen, the decomposition of MB exceeded 95% after ~20 min plasma treatment. Higher efficiency was obtained for higher treated volume and higher initial concentration. At 90% conversion the yield obtained with oxygen was ~5 g/kWh for an initial concentration of 150 mg/l and a treated volume of solution of 100 ml.
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ISSN:0272-4324
1572-8986
DOI:10.1007/s11090-008-9155-x