Degradation of enoxacin antibiotic by the electro-Fenton process: Optimization, biodegradability improvement and degradation mechanism

Abstract : This study aims to investigate the effectiveness of the electro-Fenton process on the removal of a second generation of fluoroquinolone, enoxacin. The electrochemical reactor involved a carbon-felt cathode and a platinum anode. The influence of some experimental parameters, namely the initial enoxacin concentration, the applied current intensity and the Fe(II) amount, was examined. The degradation of the target molecule was accompanied by an increase of the biodegradability, assessed from the BOD5 on COD ratio, which increased from 0 before treatment until 0.5 after 180 min of electrolysis at 50 mg L−1 initial enoxacin concentration, 0.2 mmol L−1 Fe(II) concentration and 300 mA applied current intensity. TOC and COD time-courses were also evaluated during electrolysis and reached maximum residual yields of 54% and 43% after 120 min of treatment, respectively. Moreover, a simultaneous generation of inorganic ions (fluorides, ammonium and nitrates) were observed and 3 short chain carboxylic acids (formic, acetic and oxalic acids) were identified and monitored during 180 min of electrolysis. By-products were identified according to UPLC-MS/MS results and a degradation pathway was proposed
Document type :
Journal articles
Complete list of metadatas

https://hal-univ-rennes1.archives-ouvertes.fr/hal-01208401
Contributor : Laurent Jonchère <>
Submitted on : Thursday, November 5, 2015 - 12:03:30 PM
Last modification on : Monday, February 25, 2019 - 3:14:08 PM

Identifiers

Citation

Cyrine Annabi, Florence Fourcade, Isabelle Soutrel, Florence Geneste, Didier Floner, et al.. Degradation of enoxacin antibiotic by the electro-Fenton process: Optimization, biodegradability improvement and degradation mechanism. Journal of Environmental Management, Elsevier, 2016, 165, pp.96--105. ⟨10.1016/j.jenvman.2015.09.018⟩. ⟨hal-01208401⟩

Share

Metrics

Record views

316

Files downloads

374