Titanium industrial residues surface modification towards its reuse as antimicrobial surfaces.

Autor: Ungureanu C; General Chemistry Department, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1-7 Polizu, 011061, Bucharest, Romania., Barbulescu L; General Chemistry Department, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1-7 Polizu, 011061, Bucharest, Romania.; National Research & Development Institute for Non-Ferrous and Rare Metals, 102 Biruintei Blvd, 077145, Pantelimon, Ilfov, Romania., Dumitriu C; General Chemistry Department, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1-7 Polizu, 011061, Bucharest, Romania., Manole C; General Chemistry Department, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1-7 Polizu, 011061, Bucharest, Romania., Pirvu C; General Chemistry Department, Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1-7 Polizu, 011061, Bucharest, Romania. cristian.pirvu@upb.ro.
Jazyk: angličtina
Zdroj: Environmental science and pollution research international [Environ Sci Pollut Res Int] 2021 Jul; Vol. 28 (28), pp. 38224-38237. Date of Electronic Publication: 2021 Mar 17.
DOI: 10.1007/s11356-021-13359-x
Abstrakt: In this study, a new material obtained from titanium ingots residue was coated with natural carotenoids having antibacterial properties. The waste is a no recycling titanium scrap from technological production process which was pressed and transformed into disks titanium samples. Through anodization and annealing procedures of the titanium disk, a nanostructured titanium dioxide surface with photocatalytic and antibacterial properties was successfully obtained. The titanium scrap impurities (V, Al, and N), unwanted for production process, have shown to improve electrochemical and semiconductor properties of the residue surfaces. The nanostructured titanium scrap surface was modified with two different carotenoids, torularhodin and β-carotene, to potentiate the antibacterial properties. The bactericidal tests were performed against Salmonella typhimurium and Escherichia coli, both Gram-negative. The best bactericidal effect is obtained for nanostructured titanium scrap disks immersed in torularhodin, with a percentage of growth inhibition around 60% against both tested bacteria. The results suggest that this low-cost waste material is suitable for efficient reuse as antibacterial surface after a few simple and inexpensive treatments.
(© 2021. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.)
Databáze: MEDLINE
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