Journal
CATALYSTS
Volume 10, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/catal10090959
Keywords
non-thermal plasma (NTP); heterogeneous Fenton catalyst; advanced oxidation process (AOP); paracetamol degradation; water treatment; mineralization; energy yield
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Funding
- PIVOTS project by the Region Centre-Val de Loire (ARD 2020 program)
- PIVOTS project by the Region Centre-Val de Loire (CPER 2015 -2020)
- French Ministry of Higher Education and Research (CPER 2015-2020)
- Region Centre-Val de Loire
- French Ministry of Higher Education and Research
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In order to remediate the very poor mineralization of paracetamol in water, even when well degraded by using a Non-Thermal Plasma (NTP) process at a very low dissipated power, a plasma-catalyst coupling process was tested and investigated. A homemade glass fiber supported Fe(3+)catalyst was immersed in the liquid to be treated in a Dielectric Barrier Discharge plasma reactor. The plasma-catalysis process, at the same low dissipated power, achieved a mineralization rate of 54% with a full conversion rate of paracetamol at 25 mg L(-1)in initial concentration after 60 min treatment, thanks to Fenton-like effects. The synergetic effects of the plasma-catalysis coupling process also improved the Energy Yield by a factor of two. The catalyst before and after use for treatment was characterized by Brunauer-Emmett-Teller and Thermogravimetric analysis. High-Performance Liquid Chromatography was used to measure the concentration of treated solution and to investigate the intermediates. Two of them, namely 1,4-hydroquinone and 1,4-benzoquinone, were formally identified. Some intermediates are presented in this paper as a function of treatment time and their UV absorbance spectra. NTP processes with and without catalyst coupling were compared in terms of acidity, conductivity, and nitrate concentrations in the treated solution.
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