Journal
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
Volume 184, Issue 1-2, Pages 141-146Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jphotochem.2006.04.007
Keywords
antibiotic; bacterial activity; photocatalysis; tetracycline; TiO2
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To compare tetracycline abatement efficiency, tetracycline solutions were irradiated in aqueous suspensions of TiO2 with three different light sources: a UV lamp, a solarium device and a UV-A lamp. Negligible degradation was observed when irradiations were performed in absence of TiO2. In contrast, rapid tetracycline degradation was observed in the presence of 0.5 g l(-1) of TiO2. Close to 50% of its initial concentration was eliminated after 10, 20 and 120min when the irradiation source used was a UV lamp, a solarium device and a UV-A lamp, respectively. Significant mineralization was also obtained when the UV lamp and solarium were used for photocatalysis. The antibacterial activity of selected microorganisms was drastically inhibited when exposed to tetracycline solutions treated by the photocatalyst over short irradiation periods. (c) 2006 Elsevier B.V. All rights reserved.
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