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Effect of the radiation flux on the photocatalytic inactivation of spores of Bacillus subtilis by Silvia Mercedes Zacarías; María Celia Vaccari; Orlando Mario Alfano; Horacio Antonio Irazoqui; Gustavo Eduardo Imoberdorf is a Materials Science article available to read on EtoBox.
What is Effect of the radiation flux on the photocatalytic inactivation of spores of Bacillus subtilis about?
In this paper, the photocatalytic inactivation of dry spores of Bacillus subtilis dispersed on TiO 2 films and irradiated with UV-A radiation (2.44-0.29 mW cm -2 ) was studied. Experimental results indicate a minor reduction in the number of viable spores (69% of inactivation after 48 h of irradiation) when they were irradiated with UV-A radiation on borosilicate glass plates (without TiO 2 ), confirming the resistance of spores to UV-A radiation. However, the number of viable spores significantly decreased when they were irradiated with UV-A under similar conditions but on plates coated with TiO 2 (99.88% of inactivation after 24 h of irradiation), showing that dry spores of B. subtilis are vulnerable to photocatalytic inactivation. A simplified scheme was proposed to model the photocatalytic inactivation of B. subtilis, from which a kinetic expression was derived. Since the rate of photocatalytic inactivation is strongly dependent on the flux of the UV radiation on the TiO 2 films, the radiation field was modeled by means of CFD software. Experimental results of spore inactivation were fitted with the derived kinetic expression, showing the inactivation rate has a square root dep
Who reads Effect of the radiation flux on the photocatalytic inactivation of spores of Bacillus subtilis?
It is typically read by researchers, students, and practitioners in Materials Science.
- Author
- Silvia Mercedes Zacarías; María Celia Vaccari; Orlando Mario Alfano; Horacio Antonio Irazoqui; Gustavo Eduardo Imoberdorf
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 1010-6030)
- Published
- 2010
- Language
- EN
- Field
- Materials Science (Physical Sciences)