Inactivation and disposal of by-products from Mycobacterium smegmatis by photoelectrocatalytic oxidation using Ti/TiO2-Ag nanotube electrodes

Author(s)

Brugnera, Michelle Fernanda ^[1] ; Miyata, Marcelo ^[2] ; Zocolo, Guilherme Juliao ^[1] ; Fujimura Leite, Clarice Queico ^[2] ; Boldrin Zanoni, Maria Valnice ^[1]

Affiliation

^[1] UNESP, Inst Chem, Dept Analyt Chem, BR-14800900 Araraquara, SP - Brazil

^[2] UNESP, Fac Pharmaceut Sci, Dept Biol Sci, BR-14801902 Araraquara, SP - Brazil

• Document type: Journal article
• Source: Electrochimica Acta; v. 85, p. 33-41, DEC 15 2012.
• Web of Science Citations: 16

Abstract

TiO2 nanotubular array electrodes coated with 16% (w/w) Ag nanoparticles (Ti/TiO2-Ag) have shown excellent performance in the disinfection of water containing Mycobacterium smegmatis. Photoelectrocatalytic disinfection of M. smegmatis 5.1 x 10(3) Colony Forming Units (CFU) mL(-1) in 0.05 M Na2SO4 (pH 6), applied potential of +1.5 V versus Ag/AgCl and UV irradiation promoted 100% inactivation after 3 min of treatment. Mycobacteria degradation was also monitored by TOC removal, sugar release, chromatography and mass spectroscopy measurements. All analytical methods used confirmed that there was complete inactivation of mycobacteria and degradation of the by-products generated during cellular lyses by the proposed method. (C) 2012 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 09/09403-5 - Electroanalytical and chromatographic methods applied in the analysis of mycobacteria and photoeletrocatalytic disinfection of mycobacteria and candidas using electrodes of Ti/TiO2 and Ti/TiO2-Ag nanotubes
• Grantee: Michelle Fernanda Brugnera
• Support Opportunities: Scholarships in Brazil - Doctorate