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Decomposition of Methylene Blue in Water by Corona Discharges

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Abstract

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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Acknowledgments

The authors acknowledge financial support from the Swiss National Science Foundation under the SCOPES program and from the Romanian Ministry for Education and Research under the IDEI program.

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Authors and Affiliations

  1. Department of Plasma Physics and Nuclear Fusion, National Institute for Lasers, Plasma and Radiation Physics, Str. Atomistilor 409, P.O. Box MG-36, 077125, Bucharest-Magurele, Romania

    Monica Magureanu, Daniela Piroi, Florin Gherendi & Nicolae Bogdan Mandache

  2. Faculty of Chemistry, Department of Chemical Technology and Catalysis, University of Bucharest, Bd. Regina Elisabeta, 4-12, 030016, Bucharest, Romania

    Vasile Parvulescu

Authors
  1. Monica Magureanu
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  2. Daniela Piroi
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  3. Florin Gherendi
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  4. Nicolae Bogdan Mandache
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  5. Vasile Parvulescu
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Correspondence to Monica Magureanu.

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Magureanu, M., Piroi, D., Gherendi, F. et al. Decomposition of Methylene Blue in Water by Corona Discharges. Plasma Chem Plasma Process 28, 677–688 (2008). https://doi.org/10.1007/s11090-008-9155-x

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  • DOI: https://doi.org/10.1007/s11090-008-9155-x

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