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Type: Artigo de periódico
Title: Photocatalytic Degradation Of Ofloxacin And Evaluation Of The Residual Antimicrobial Activity
Author: Peres M.S.
Maniero M.G.
Guimaraes J.R.
Abstract: Ofloxacin is an antimicrobial agent frequently found in significant concentrations in wastewater and surface water. Its continuous introduction into the environment is a potential risk to non-target organisms or to human health. In this study, ofloxacin degradation by UV/TiO2 and UV/TiO2/H2O2, antimicrobial activity (E. coli) of samples subjected to these processes, and by-products formed were evaluated. For UV/TiO2, the degradation efficiency was 89.3% in 60 min of reaction when 128 mg L-1 TiO2 were used. The addition of 1.68 mmol L-1 hydrogen peroxide increased degradation to 97.8%. For UV/TiO2, increasing the catalyst concentration from 4 to 128 mg L-1 led to an increase in degradation efficiency. For both processes, the antimicrobial activity was considerably reduced throughout the reaction time. The structures of two by-products are presented: m/z 291 (9-fluoro-3-methyl-10-(methyleneamino)-7-oxo-2,3-dihydro-7H-[1,4]oxazino[2,3,4-ij]quinoline-6-carboxylic acid) and m/z 157 ((Z)-2-formyl-3-((2-oxoethyl)imino)propanoic acid).
Editor: Royal Society of Chemistry
Citation: Photochemical And Photobiological Sciences. Royal Society Of Chemistry, v. 14, n. 3, p. 556 - 562, 2015.
Rights: aberto
Identifier DOI: 10.1039/c4pp00256c
Date Issue: 2015
Appears in Collections:Unicamp - Artigos e Outros Documentos

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