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Sonochemical degradation of ofloxacin in aqueous solutions

Xekoukoulotakis Nikos, Mantzavinos Dionysis, D. Fatta-Kassinos, Valanidou L., Papaioannou A., Achilleos A., Hapeshi E.

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URIhttp://purl.tuc.gr/dl/dias/8907B25E-DA97-4190-B38C-66A42228FC78-
Identifierhttps://doi.org/10.2166/wst.2010.921-
Languageen-
ExtentPages 3141–3146en
TitleSonochemical degradation of ofloxacin in aqueous solutionsen
CreatorXekoukoulotakis Nikosen
CreatorΞεκουκουλωτακης Νικοςel
CreatorMantzavinos Dionysisen
CreatorΜαντζαβινος Διονυσηςel
CreatorD. Fatta-Kassinosen
CreatorValanidou L.en
CreatorPapaioannou A.en
CreatorAchilleos A.en
CreatorHapeshi E.en
PublisherWater Science and Technologyen
Content SummaryThe use of low frequency (20 kHz), high energy ultrasound for the degradation of the antibiotic ofloxacin in water was investigated. Experiments were performed with a horn-type ultrasound generator at varying applied power densities (130–640 W/L), drug concentrations (5–20 mg/L), hydrogen peroxide concentrations (0–100 mM) and sparging gases (air, oxygen, nitrogen and argon). In general, conversion (which was assessed following sample absorbance at 288 nm) increased with increasing ultrasound energy and peroxide concentration and decreasing initial drug concentration. Moreover, reactions under an argon atmosphere were faster than with diatomic gases, possibly due to argon's physical properties (e.g. solubility, thermal conductivity and specific heat ratio) favoring sonochemical activity. Overall, low to moderate levels of ofloxacin degradation were achieved (i.e. it never exceeded 50%), thus indicating that radical reactions in the liquid bulk rather than thermal reactions in the vicinity of the cavitation bubble are responsible for ofloxacin degradation.en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2015-10-22-
Date of Publication2010-
Bibliographic CitationE. Hapeshi, A. Achilleos, A. Papaioannou, L. Valanidou, N.P. Xekoukoulotakis, D. Mantzavinos, D. Kassinos, Sonochemical degradation of ofloxacin in aqueous solutions, Water Science and Technology, Vol. 61, no. 12, pp. 3141-3146, 2010. doi:10.2166/wst.2010.921.en

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