Original scientific paper
https://doi.org/10.5599/jese.2014.0062
Anodic oxidation of oxytetracycline: Influence of the experimental conditions on the degradation rate and mechanism
Annabel Fernandes
; UMTP and Department of Chemistry, University of Beira Interior, 6201-001 Covilhã, Portugal
Catarina Oliveira
; UMTP and Department of Chemistry, University of Beira Interior, 6201-001 Covilhã, Portugal
Maria J Pacheco
; UMTP and Department of Chemistry, University of Beira Interior, 6201-001 Covilhã, Portugal
Lurdes Ciríaco
; UMTP and Department of Chemistry, University of Beira Interior, 6201-001 Covilhã, Portugal
Ana Lopes
; UMTP and Department of Chemistry, University of Beira Interior, 6201-001 Covilhã, Portugal
Abstract
The anodic oxidation of oxytetracycline was performed with success using as anode a boron-doped diamond electrode. The experiments were conducted in batch mode, using two different electrochemical cells: an up-flow cell, with recirculation, that was used to evaluate the influence of recirculation flow rate; and a stirred cell, used to determine the influence of the applied current density. Besides oxytetracyclin electrodegradation rate and mineralization extent, oxidation by-products were also assessed. Both the flow rate and the applied current density have shown positive influence on the oxytetracycline oxidation rate. On the other hand, the mineralization degree presented the highest values at the lowest flow rate and the lowest current density tested. The main oxidation by-products detected were oxalic, oxamic and maleic acids.
Keywords
Tetracyclines; BDD; antibiotics; pharmaceutical compounds; electrochemical degradation
Hrčak ID:
130220
URI
Publication date:
6.12.2014.
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