Evaluation of Energy Balance in a Batch and Circulating Non-thermal Plasma Reactors During Organic Pollutant Oxidation in Aqueous Solution
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This work presents the treatment of an organic waste solution using gliding arc plasma in moist air, which is an excellent source of oxidizing species. Herein particular attention is devoted to the comparative energy balance between two model reactors in order to optimize the process and get closer to a large-scale application. The model pollutant Amoxicillin is an antibiotic agent largely used against allergies and has been found in wastewaters. Its degradation is studied by exposing basic solutions to underline the role of the formed •OH radicals and H2O2 reactive species. The degradation of AMX to give CO2, H2O, and sulfate is optimized within 120 min with a resulting abatement of 78% and 98% for batch and circulation reactors respectively. The kinetic study suggests a pseudo-first order process with an apparent rate constant three times higher in circulation mode compared to batch mode reactor. Accordingly, the energetic yield is 2.5 times better in the circulation system, owing to more consumption of plasma-generated species with respect to the high reactive area, whereas in batch mode reactor, AMX degradation is occurred at the plasma-liquid interface, and thus limited by the mass transfer process.
KeywordsNon-thermal plasma Reactors Plasma-liquid interaction Energy balance Amoxicillin
The authors are grateful to “Service de la Cooperation et d’Action Culturelle” (SCAC) of the Cameroon French Embassy for the grant awarded to J.B. Tarkwa.
- 1.Hnatiuc E (2002) Procédés électriques de mesure et de traitement des polluants. Editions Tec & Doc Lavoisier, Paris, p 370Google Scholar
- 5.Vanraes P, Nikiforov A, Leys C (2016) Electrical discharge in water treatment technology for micropollutant decomposition. In: Mieno T (ed) Plasma science and technology: progress in physical states and chemical reactions. IntechOpen, p 457–506. https://doi.org/10.5772/61830
- 13.Popov NA (2006) Simulation of a longitudinal glow discharge in a hot air flow at atmospheric pressure. Plasma Phys Rep 32:264–272Google Scholar
- 17.Doubla A, Burlica R, Hnatiuc E, Brisset JL (2005) Energy balance for a quenched plasma reactor of the gliding arc type at atmospheric pressure. Phys Chem News 25:135–137Google Scholar
- 19.Lesueur H et al (1988) Dispositif de generation de plasma basse temperature par formation de decharges electriques glissantes. Fr Pattern 2639172Google Scholar
- 28.Shih KY, Locke BR (2010) Chemical and physical characteristics of pulsed electrical discharge within gas bubbles in aqueous solutions. Plasma Chem Plasma Process 36:767–781Google Scholar
- 34.Foster JE (2017) Plasma-based water purification: challenges and prospects for future. J Phys D Appl Phys 24:0–16Google Scholar
- 37.Ganiyu SO, Oturan N, Raffy S, Cretin M, Esmilaire R, Van Hullebusch E, Esposito G, Oturan MA (2016) Sub-stoichiometric titanium oxide (Ti4O7) as a suitable ceramic anode for electrooxidation of organic pollutants: a case study of kinetics, mineralization and toxicity assessment of amoxicillin. Water Res 106:171–182CrossRefGoogle Scholar
- 38.Boles M, Cengel Y (2014) Thermodynamics an engineering approach, 8th edn. McGraw-Hill Education, New York, p 1024Google Scholar