Activation of persulfate by irradiated laterite for removal of fluoroquinolones in multi-component systems

Mahamadou Kamagate; Aymen Amin Assadi; Tiangoua Kone; Lacina Coulibaly; Khalil Hanna

doi:10.1016/j.jhazmat.2017.12.011

Activation of persulfate by irradiated laterite for removal of fluoroquinolones in multi-component systems

J Hazard Mater. 2018 Mar 15:346:159-166. doi: 10.1016/j.jhazmat.2017.12.011. Epub 2017 Dec 6.

Authors

Mahamadou Kamagate¹, Aymen Amin Assadi², Tiangoua Kone³, Lacina Coulibaly³, Khalil Hanna⁴

Affiliations

¹ Ecole Nationale Supérieure de Chimie de Rennes, UMR CNRS 6226, 11 Allée de Beaulieu, F-35708 Rennes Cedex 7, France; Université Nangui Abrogoua, 02 BP 801 Abidjan 02, Côte d'Ivoire.
² Ecole Nationale Supérieure de Chimie de Rennes, UMR CNRS 6226, 11 Allée de Beaulieu, F-35708 Rennes Cedex 7, France.
³ Université Nangui Abrogoua, 02 BP 801 Abidjan 02, Côte d'Ivoire.
⁴ Ecole Nationale Supérieure de Chimie de Rennes, UMR CNRS 6226, 11 Allée de Beaulieu, F-35708 Rennes Cedex 7, France. Electronic address: khalil.hanna@ensc-rennes.fr.

PMID: 29268162
DOI: 10.1016/j.jhazmat.2017.12.011

Abstract

Although several emerging contaminants (e.g. fluoro(quinolones) (FQs)) have been simultaneously detected in environmental systems, there is very limited information on their elimination from contaminated waters in multi-component systems. In this study, removal of three FQs including flumequine (FLU), ciprofloxacin (CIP) and norfloxacin (NOR) were investigated in single and mixture systems, using natural laterite soil and persulfate (PS) under UVA irradiation. Both sorption and oxidation reactions contribute to the removal of FQs from aqueous phase, whereas quenching experiments showed that SO₄^- is mainly responsible for the FQs oxidation. The kinetic rate constants can be ranked as follows: CIP > NOR > FLU, regardless of whether the compound was alone or in mixture. The higher degradation rate constant of CIP relative to those of NOR and FLU could be explained by the high reactivity of SO₄^- radical with cyclopropane-ring containing compounds. Fall in oxidation performance was observed in synthetic wastewater, probably due to sulfate radical scavenging by wastewater components. However, degradation rate constants of CIP in wastewater remains unchanged in mixture systems as compared to single ones. This environmentally friendly remediation technology may appear as a promising way for the removal of fluoroquinolone antibiotics from multi-contaminated waters.

Keywords: Fluoroquinolones; Laterite; Mixture; Oxidation; Persulfate.

Publication types

Research Support, Non-U.S. Gov't