Artículos de revistas
Antimicrobial Activity Against Gram-positive And Gram-negative Bacteria During Gatifloxacin Degradation By Hydroxyl Radicals
Registro en:
Environmental Science And Pollution Research. Springer Heidelberg, v. 24, p. 6288 - 6298, 2017.
0944-1344
1614-7499
WOS:000399163700034
10.1007/s11356-016-6972-y
Autor
Caianelo
Marlon; Rodrigues-Silva
Caio; Maniero
Milena Guedes; Guimaraes
Jose Roberto
Institución
Resumen
Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Gatifloxacin, an antimicrobial drug belonging to the fluoroquinolone family, is active against Gram-positive and Gram-negative bacteria and is extensively used for the control of infections in humans. The presence of the drug in environmental matrices has already been reported. This study investigated the degradation of gatifloxacin in water by hydroxyl radicals generated by the UV254 nm/H2O2 process (CH2O2initial = 0.4-2.4 mmol L-1) and evaluated the capacity of the radicals to reduce the antimicrobial activity against Gram-positive and Gram-negative bacteria. Acute toxicity assays were performed with Vibrio fischeri, and the degradation products were proposed. The hydroxyl radicals formed in the processes were able to degrade the fluoroquinolone and remove the antimicrobial activity from the aqueous solution. Approximately 97 % gatifloxacin degradation was observed after applying 2.4 mmol L-1 of initial H2O2 concentration and 20 min of UVC254nm irradiation (130 J s(-1)). The acute toxicity assays showed that the toxicity of the treated solution for V. fischeri increased as the gatifloxacin concentration in the solution decreased. 24 7 6288 6298 FAPESP [2014/06064-3, 2014/06201-0, 2013/09543-7, 2013/04656-8, 2014/16622-3, 2013/07817-2] CNPq [479131/2013-9] Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)