Publications des scientifiques de l'IRD

Mahdi-Ahmed M., Chiron Serge. (2014). Ciprofloxacin oxidation by UV-C activated peroxymonosulfate in wastewater. Journal of Hazardous Materials, 265, p. 41-46. ISSN 0304-3894.

Titre du document
Ciprofloxacin oxidation by UV-C activated peroxymonosulfate in wastewater
Année de publication
2014
Type de document
Article référencé dans le Web of Science WOS:000331021100005
Auteurs
Mahdi-Ahmed M., Chiron Serge
Source
Journal of Hazardous Materials, 2014, 265, p. 41-46 ISSN 0304-3894
This work aimed at demonstrating the advantages to use sulfate radical anion for eliminating ciprofloxacin residues from treated domestic wastewater by comparing three UV-254 nm based advanced oxidation processes: UV/persulfate (PDS), UV/peroxymonosulfate (PMS) and UV/H2O2. In distilled water, the order of efficiency was UV/PDS>UV/PMS>UV/H2O2 while in wastewater, the most efficient process was UV/PMS followed by UV/PDS and UV/H2O2 mainly because PMS decomposition into sulfate radical anion was activated by bicarbonate ions. CIP was fully degraded in wastewater at pH 7 in 60 min for a [PMS]/[CIP] molar ratio of 20. Nine transformation products were identified by liquid chromatography-high resolution-mass spectrometry allowing for the establishment of degradation pathways in the UV/PMS system. Sulfate radical anion attacks prompted transformations at the piperazinyl ring through a one electron oxidation mechanism as a major pathway while hydroxyl radical attacks were mainly responsible for quinolone moiety transformations as a minor pathway. Sulfate radical anion generation has made UV/PMS a kinetically effective process in removing ciprofloxacin from wastewater with the elimination of ciprofloxacin antibacterial activity.
Plan de classement
Pollution [038] ; Hydrologie [062]
Localisation
Fonds IRD [F B010063839]
Identifiant IRD
fdi:010063839
Contact