title: Degradation of antibiotics in water by non-thermal plasma treatment.
abstract: The decomposition of three β-lactam antibiotics (amoxicillin, oxacillin and ampicillin) in aqueous solution was investigated using a dielectric barrier discharge (DBD) in coaxial configuration. Solutions of concentration 100 mg/L were made to flow as a film over the surface of the inner electrode of the plasma reactor, so the discharge was generated at the gas-liquid interface. The electrical discharge was operated in pulsed regime, at room temperature and atmospheric pressure, in oxygen. Amoxicillin was degraded after 10 min plasma treatment, while the other two antibiotics required about 30 min for decomposition. The evolution of the degradation process was continuously followed using liquid chromatography-mass spectrometry (LC-MS), total organic carbon (TOC) and chemical oxygen demand (COD) analyses.
authors.affiliation: National Institute for Lasers, Plasma and Radiation Physics, Department for Plasma Physics and Nuclear Fusion, Atomistilor Str. 409, Magurele-Bucharest 077125, Romania. monimag@infim.ro
authors.forename: M
authors.initials: M
authors.lastname: Magureanu
authors.forename: D
authors.initials: D
authors.lastname: Piroi
authors.forename: N B
authors.initials: NB
authors.lastname: Mandache
authors.forename: V
authors.initials: V
authors.lastname: David
authors.forename: A
authors.initials: A
authors.lastname: Medvedovici
authors.forename: C
authors.initials: C
authors.lastname: Bradu
authors.forename: V I
authors.initials: VI
authors.lastname: Parvulescu
mesh_terms: D000658:Amoxicillin / Q000032:analysis / Q000737:chemistry; D000667:Ampicillin / Q000032:analysis / Q000737:chemistry; D000900:Anti-Bacterial Agents / Q000032:analysis / Q000737:chemistry*; D002853:Chromatography, Liquid; D013058:Mass Spectrometry; D010068:Oxacillin / Q000032:analysis / Q000737:chemistry; D058626:Plasma Gases / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000737:chemistry*
chemical_list: D000900:Anti-Bacterial Agents; D058626:Plasma Gases; D014874:Water Pollutants, Chemical; D000667:Ampicillin; D000658:Amoxicillin; D010068:Oxacillin