Catálogo de publicaciones - tesis
Título de Acceso Abierto
Inactivación fotocatalítica de microorganismos presentes en el aire, empleando dióxido de titanio soportado y radiación UV
Silvia Mercedes Zacarías Orlando Mario Alfano Roberto Jorge Candal Fernando Sebastián García Einschlag Teresita Francisca Garetto María Lucila Satuf
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Resumen/Descripción – provisto por el repositorio digital
In this thesis we studied the application of heterogeneous photocatalysis to eliminate microorganisms in the air. Specifically, the use of UV radiation and titanium dioxide supported on glass plates to inactivate spores of Bacillus subtilis was studied. The development of the thesis work comprised the following steps: - We designed and built an experimental device for irradiating spores deposited on surfaces. It provides a uniform illumination area for photocatalytic inactivation, has a compartment which isolates samples from potential environmental contamination, and maintains constant the temperature and relative humidity. - A simplified scheme was proposed to model the photocatalytic inactivation of B. subtilis, from which an expression kinetics was derived. Since inactivation depends on UV radiation absorbed by the TiO2 films, the radiation field was modeled using CFD software (computational fluid dynamics). The kinetic parameters of the model are obtained from experimental data. - Different TiO2 coatings were characterized and compared, using synthesized in the laboratory and commercial catalysts. To objectively compare the performance of the coatings were calculated two types of efficiency apparent quantum efficiency and quantum efficiency of inactivation. These parameters take into account the incident radiation and the radiation absorbed on the catalyst surface, respectively. - In order to increase the efficiency of spore inactiviación, the activity of TiO2 coatings with different concentrations of Ag was evaluated.Palabras clave – provistas por el repositorio digital
Photocatalysis; UV radiation; Inactivation; Aerosols; spores; Bacillus subtilis; Fotocatálisis; Radiación UV; Inactivación; Aerosoles; esporos
Disponibilidad
| Institución detectada | Año de publicación | Navegá | Descargá | Solicitá |
|---|---|---|---|---|
| No requiere | 2014 | Biblioteca Virtual de la Universidad Nacional del Litoral (SNRD) |
|
Información
Tipo de recurso:
tesis
Idiomas de la publicación
- español castellano
País de edición
Argentina
Fecha de publicación
2014-04-21
