Factors Affecting Microbial Resistance to Advanced Oxidation Processes in Water-Borne Bacterial Disinfection
Abstract:Advanced oxidation techniques have been researched and suggested as an alternative to conventional disinfection where photocatalytic titanium dioxide nanoparticles show great promise as an antimicrobial agent for water treatment applications. In the application of this material, ultraviolet radiation photoactivates the nanoparticles, leading to the production of reactive oxygen species (ROS) and subsequent destruction of microbial cells through potent oxidative reactions. Although extrinsic variables to maximize the effectiveness of the process, such as effective nanoparticle concentration and UV light intensity can be standardized for application, intrinsic variation in microorganisms and oxidative barriers can limit the effectiveness of this disinfection procedure. In this study, the intensity of UV-A radiation was varied and applied to different concentrations of n-TiO2 in a bacterial suspension to elucidate the impact of these variables on the efficacy of TiO2 enhanced pathogen disinfection. Additionally, the effect of a radical scavenger was tested to determine how these reactions may limit the effectiveness of this disinfection practice. To visualize the physical interaction between pathogen and nanoparticle, TEM images were acquired to inspect the physiological condition of the microorganism before and after the disinfection process.
Document Type: Research Article
Publication date: 2011-01-01
More about this publication?
- Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.
WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event
- Subscribe to this Title
- Membership Information
- About WEF Proceedings
- WEFTEC Conference Information
- Learn about the many other WEF member benefits and join today
- Ingenta Connect is not responsible for the content or availability of external websites