Effect of the Presence of Inorganic Salts on the Photocatalytic Inactivation of E. Coli in Water

Ingeniería y Ciencia

Giraldo, Sonia A¹  Moreno, Andrea L¹  Velasco, Edwing¹ 

[1] Universidad Industrial de Santander, Bucaramanga, Colombia

关键词: photocatalysis;    TiO2;    disinfection;    inorganic salts;    kinetic;   

DOI  :  

学科分类：工程和技术（综合）

来源: Universidad E A F I T

【 摘 要 】

This article presents the effect of inorganic salts MgSO4, NaCl and CaCO3on 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.

【 授权许可】

Unknown