Publication Details |
Category | Text Publication |
Reference Category | Journals |
DOI | 10.1016/j.biortech.2011.08.055 |
Title (Primary) | Degradation of the antibiotics norfloxacin and ciprofloxacin by a white-rot fungus and identification of degradation products |
Author | Prieto, A.; Möder, M.; Rodil, R.; Adrian, L.
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Source Titel | Bioresource Technology |
Year | 2011 |
Department | ISOBIO; ANA |
Volume | 102 |
Issue | 23 |
Page From | 10987 |
Page To | 10995 |
Language | englisch |
Keywords | Fluoroquinolones; Trametes versicolor; Pharmaceuticals; Biodegradation; Laccase |
Abstract | More than 90% of the antibiotics ciprofloxacin (CIPRO) and norfloxacin (NOR) at 2 mg L−1 were degraded by Trametes versicolor after 7 days of incubation in malt extract liquid medium. In in vitro assays with purified laccase (16.7 nkat mL−1), an extracellular enzyme excreted constitutively by this fungus, 16% of CIPRO was removed after 20 h. The addition of the laccase mediator 2,2-azino-bis-(3-ethylbenzthiazoline-6-sulfonic acid) diammonium salt led to 97.7% and 33.7% degradation of CIPRO and NOR, respectively. Inhibition of CIPRO and NOR degradation by the cytochrome P450 inhibitor 1-aminobenzotriazole suggests that the P450 system also plays a role in the degradation of the two antibiotics. Transformation products of CIPRO and NOR were monitored at different incubation times by triple-quadrupole and quadrupole time-of-flight mass spectrometry, and can be assigned to three different reaction pathways: (i) oxidation of the piperazinyl substituent, (ii) monohydroxylation, and (iii) formation of dimeric products. |
Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=11685 |
Prieto, A., Möder, M., Rodil, R., Adrian, L., Marco-Urrea, E. (2011): Degradation of the antibiotics norfloxacin and ciprofloxacin by a white-rot fungus and identification of degradation products Bioresour. Technol. 102 (23), 10987 - 10995 10.1016/j.biortech.2011.08.055 |