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Analogies and differences between photocatalytic oxidation of chemicals and photocatalytic inactivation of microorganisms

dc.contributor.authorMarugán, Javier
dc.contributor.authorvan Grieken, Rafael
dc.contributor.authorPablos, Cristina
dc.contributor.authorSordo, Carlos
dc.identifier.citationWater Research, 44: 789-796 (2010)es
dc.description.abstractThis study reports the analogies and differences found when comparing TiO2 photocatalytic treatment for chemical oxidation and microorganisms inactivation, using methylene blue and Escherichia coli as references, respectively. In both processes the activation is based on the same physicochemical phenomena and consequently a good correlation between them is observed when analyzing the effect of operational variables such as catalyst concentration or incident radiation flux, both factors influencing common stages such radiation absorption and generation of reactive oxygen species. However, different microbiological aspects (osmotic stress, repairing mechanism, regrowth, bacterial adhesion to the titania surface, etc) makes disinfection kinetics significantly more complex than the first-order profiles usually observed for the oxidation of chemical pollutants. Moreover, bacterial inactivation reactions are found to be extremely sensitive to the composition of water and modifications of the catalysts in comparison with the decolorization of the dye solutions, showing opposite behaviors to the presence of chlorides, incorporation of silver to the catalysts or the use of different types of immobilized TiO2 systems. Therefore, the activity observed for the photocatalytic oxidation of organics can not be always extrapolated to photocatalytic disinfection
dc.rightsAtribución-NoComercial-SinDerivadas 3.0 España*
dc.subjectMedio Ambientees
dc.titleAnalogies and differences between photocatalytic oxidation of chemicals and photocatalytic inactivation of microorganismses
dc.subject.unesco23 Químicaes
dc.description.departamentoTecnología Química y Ambiental

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Atribución-NoComercial-SinDerivadas 3.0 EspañaExcept where otherwise noted, this item's license is described as Atribución-NoComercial-SinDerivadas 3.0 España