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Inactivation of Staphylococcus aureus in water by means of solar photocatalysis using metal doped TiO2 semiconductors

Venieri Danai, Tournas Fanourios, Gounaki Iosifina, Binas Vassilios D., Zachopoulos Apostolos, Kiriakidis, G, Mantzavinos Dionysis

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URIhttp://purl.tuc.gr/dl/dias/00CA0BF0-664A-49CD-B14E-70D22ED3F54F-
Identifierhttps://onlinelibrary.wiley.com/doi/abs/10.1002/jctb.5085-
Identifierhttps://doi.org/10.1002/jctb.5085-
Languageen-
Extent9 pagesen
TitleInactivation of Staphylococcus aureus in water by means of solar photocatalysis using metal doped TiO2 semiconductorsen
CreatorVenieri Danaien
CreatorΒενιερη Δαναηel
CreatorTournas Fanouriosen
CreatorΤουρνας Φανουριοςel
CreatorGounaki Iosifinaen
CreatorΓουνακη Ιωσηφιναel
CreatorBinas Vassilios D.en
CreatorZachopoulos Apostolosen
CreatorKiriakidis, Gen
CreatorMantzavinos Dionysisen
CreatorΜαντζαβινος Διονυσηςel
PublisherJohn Wiley and Sonsen
Content SummaryThe need for clean water and high hygiene standards has led to the exploration of effective disinfection techniques for the elimination of persistent and pathogenic microorganisms. The disinfection potential of cation-doped titania was investigated in terms of Staphylococcus aureus elimination in aqueous samples under artificial and natural sunlight. RESULTS: Fe-, Al- and Cr-doped TiO2 were prepared with dopant loadings of 0.04, 0.3 and 2 wt%. Cation doping resulted in absorption shifts into the visible region, thus rendering the use of solar light feasible. The relative activity for S. aureus inactivation decreased in the order Fe-TiO2 > Al-TiO2 > Cr-TiO2 > P25. For example, an approximately 5 log reduction was obtained in 30, 10 and 6 min when Fe-loading was 0.04, 0.3 and 2 wt%, respectively, at an initial bacterial concentration of 107 CFU mL−1 and a catalyst concentration of 50 mg L−1. The catalyst concentration in each case affected the overall process up to a certain extent. Scanning electron microscopy revealed interaction between the catalyst nanoparticles and bacterial cells during treatment, with significant alteration in their shape, morphology and size. Under natural sunlight conditions Fe-TiO2 and Al-TiO2 could achieve a 99.9% killing of S. aureus population after 60 min. CONCLUSION: In a nutshell, solar photocatlysis with cation-doped titania is an effective disinfection technology for adaptable and tolerant pathogens such as S. aureus.en
Type of ItemPeer-Reviewed Journal Publicationen
Type of ItemΔημοσίευση σε Περιοδικό με Κριτέςel
Licensehttp://creativecommons.org/licenses/by/4.0/en
Date of Item2018-06-08-
Date of Publication2017-
SubjectBacteriaen
SubjectDisinfectionen
SubjectPhotocatalysisen
SubjectWateren
Bibliographic CitationD. Venieri, F. Tournas, I. Gounaki, V. Binas, A. Zachopoulos, G. Kiriakidis and D. Mantzavinos, "Inactivation of Staphylococcus aureus in water by means of solar photocatalysis using metal doped TiO2 semiconductors," J. Chem. Technol. Biot., vol. 92, no. 1, pp. 43-51, Jan. 2017. doi: 10.1002/jctb.5085en

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