Effect of the presence of inorganic salts on the photocatalytic inactivation of E. Coli in water

This article presents the effect of inorganic salts MgSO4, NaCl and CaCO3 on the photocatalytic water disinfection. TiO2-P25 was used as a photocatalyst, and E. Coli was used as a contaminant. Disinfection tests were performed by controlling lighting of batch reactors loaded with contaminated water, salts and TiO2. The results of these tests were used to determine the kinetic parameters of a type Langmuir-Hinshelwood model. It was found that the salts have a strong influence on the photocatalytic inactivation of E. Coli and that each salt and its concentration affect disinfection differently in the following order: NaCl>CaCO3>>MgSO4. Additionally, the value of the calculated parameters was different for each salt, showing that the salts affect the process by several mechanisms related to the ion-bacteria interactions, ion-oxidizing species and ion-TiO2.

• Autores: Velasco, Edwing; Moreno, Andrea L; Giraldo, Sonia A
• Fecha de publicación: 2013
• Institución: Universidad EAFIT
• Repositorio: Repositorio EAFIT
• Idioma: spa
• OAI Identifier: oai:repository.eafit.edu.co:10784/14417
• Acceso en línea: http://hdl.handle.net/10784/14417
• Palabra clave: Photocatalysis; Tio2; Disinfection; Inorganic Salts; Kinetic; Fotocatálisis; Tio2; Desinfección; Sales Inorgánicas; Cinética
• License: Copyright (c) 2013 Edwing Velasco, Andrea L Moreno, Sonia A Giraldo