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Chemical reactivity of discharges and temporal post-discharges in plasma treatment of aqueous media:: Examples of gliding discharge treated solutions

Journal

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 47, Issue 16, Pages 5761-5781

Publisher

AMER CHEMICAL SOC
DOI: 10.1021/ie701759y

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Funding

  1. French Embassy in Cameroon

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Environmental applications of electric discharges are being considered increasingly more often: they imply the chemical properties of the activated species generated in and by the discharge. An overview of the resulting chemical effects is presented, based on rationalized classification, i.e., acid-base effects, oxidizing properties, complex forming reactions, and radical reactions. The gliding discharge is considered to be a specifically suitable plasma source for the treatment of liquids for pollutant abatement in the scope of sustainable environment, and this justifies an overview of the chemical properties. Special emphasis is devoted to temporal post-discharge reactions (TPDRs), which occur when the target is no longer exposed to the plasma source, and several typical examples are detailed. These recently evidenced TPDRs seem to present some general character. They are the key parameters to estimating the efficiency of a discharge treatment; they also have major technical and economical importance for the application of the plasma treatment to pollutant and/or micro-organism abatement at atmospheric pressure and quasi-ambient temperature.

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