DEGRADATION OF PARACETAMOL IN AQUEOUS SOLUTION BY NON THERMAL PLASMA

Abstract : In this study, the paracetamol degradation in water was investigated using Non Thermal Plasmas (NTP) created by Dielectric Barrier Discharges. The effects of the operating conditions (applied voltage, inlet gas composition) on the degradation were studied. A conversion rate higher than 90% was reached with an energy yield of 1 g/kWh. We showed that the efficiency of the process highly depends on electrical parameters and gas composition injected in the reactor containing the aqueous solution. The main produced species in water were nitrogen compounds, carboxylic acids and aromatic compounds. 1 Introduction Pharmaceutical substances like paracetamol are frequently present in groundwater, and present a long-term risk for the environment and health [1]. We propose to use Advanced Oxidation Processes (AOPs) using Non Thermal Plasmas to degrade these drug residues. AOPs generally refer to a specific subset of processes which produces oxidizing species such as O, O3, OH ● and H2O2. AOPs can also involve TiO2 catalysis, Fenton's reaction, and Non Thermal Plasma (NTP) [2,3]. Here, we use a NTP process which was generated by Dielectric Barrier Discharge, because they have proved to be effective for the production of oxidizing species. These processes have already been applied for the treatment of pharmaceutical compounds in aqueous media but differed in the type of plasma reactor [3,4]. To get a better understanding of degradation mechanisms, it is important to study the effects of the electrical parameters of the reactor and operating conditions on the treatment of pollutants and the generated products. So, in this work which deals with the treatment of paracetamol in liquid by non-thermal plasma process, the effects of the nature of the working gas into the solution and the plasma reactor operating parameters (voltage, power) on the conversion rate and the generated products were studied.
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Yasmine Baloul, Olivier Aubry, Hervé Rabat, Cyril Colas, Benoît Maunit, et al.. DEGRADATION OF PARACETAMOL IN AQUEOUS SOLUTION BY NON THERMAL PLASMA. 15th High Pressure Low Temperature Plasma Chemistry Symposium (HAKONE 15) , Sep 2016, Brno, Czech Republic. ⟨hal-01368370⟩

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