Affordable Access

deepdyve-link
Publisher Website

Ciprofloxacin removal via sequential electro-oxidation and enzymatic oxidation.

Authors
  • Cuprys, Agnieszka1
  • Thomson, Paisley1
  • Ouarda, Yassine1
  • Suresh, Gayatri1
  • Rouissi, Tarek1
  • Kaur Brar, Satinder2
  • Drogui, Patrick1
  • Surampalli, Rao Y3
  • 1 INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec, G1K 9A9 Canada. , (Canada)
  • 2 INRS-ETE, Université du Québec, 490, Rue de la Couronne, Québec, G1K 9A9 Canada; Department of Civil Engineering, Lassonde School of Engineering, York University, North York, Toronto, Ontario, M3J 1P3 Canada. Electronic address: [email protected] , (Canada)
  • 3 Department of Civil Engineering, University of Nebraska-Lincoln, N104 SEC PO Box 886105, Lincoln, NE 68588-6105, USA.
Type
Published Article
Journal
Journal of hazardous materials
Publication Date
May 05, 2020
Volume
389
Pages
121890–121890
Identifiers
DOI: 10.1016/j.jhazmat.2019.121890
PMID: 31862355
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

The combination of electro-oxidation and enzymatic oxidation was tested to evaluate the potency of this system to remove ciprofloxacin (CIP), a fluoroquinolone antibiotic, from water. For the electro-oxidation boron-doped diamond (BDD) and mixed metal oxides anodes were tested, at three current densities (4.42, 17.7 and 35.4 A/cm2). BDD anode at 35.4 A/cm2 exhibited the highest removal efficiency in the shortest time (>90 % removal in 6 min). For the enzymatic oxidation, laccase from Trametes versicolor was chosen. Laccase alone was not able to remove CIP; hence the influence of redox mediators was investigated. The addition of syringaldehyde (SA) and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) resulted in enhanced CIP transformation. About 48.9±4.0 % of CIP remained after 4 h of treatment when SA-mediated laccase was applied and 87.8±6.6 % in the case of ABTS-mediated laccase. The coupling of enzymatic oxidation followed by electro-oxidation led to 73 % removal of the antibiotic. Additionally, the antimicrobial activity increased up to its original efficiency after the treatment. The combination of electro-oxidation followed by enzymatic oxidation led to 97-99 % removal of CIP. There was no antimicrobial activity of the solution after the treatment. The tests with wastewater confirmed the efficacy of the system to remove CIP from the complex matrix. Copyright © 2019 Elsevier B.V. All rights reserved.

Report this publication

Statistics

Seen <100 times