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The Center of Advanced Materials for the Purification of Water with Systems

» ICT III: Disinfection

Disinfect water from current and potentially emerging pathogens without producing toxic substances, to "beat chlorination." Co-Leaders: Benito Marinas and Eric Mintz

III-A: Catalytic Control of Waterborne Pathogens, Disinfection By-Products, and Emerging Micropollutants and Development of Point-of-Use Systems

III-B: Control of Emerging Viral Pathogens with Photolytic, Photocatalytic and Synergistic Hybrid Photocatalytic/Chemical Disinfection Processes

ICT III activities are aimed at addressing the following specific WaterCAMPWS Grand Challenges. On the Science front, the projects aim to advance the fundamental understanding of the interactions of materials with water and its constituents, with special emphasis on the transport of and reactions with pathogens. The enhanced understanding resulting from fundamental research will allow the development of revolutionary new materials and systems for water purification. From a technology point of view, the ICT III team is developing new disinfectants and catalysts with physical and chemical characteristics engineered to provide effective barriers against waterborne pathogens and disinfection by-products. These materials are being integrated into systems designed to provide robust treatment and produce safe water by removing not only pathogens but also chemical contaminants. The systems also take into account that pathogens are capable of evolving in pathogenicity, virulence and resilience, and that the treatment of real waters requires taking into account potential interfering effects by inactive particulates and colloidal natural organic matter (e.g., fouling, scaling, degradation effects), salinity. Furthermore the regeneration of materials, when required, are being designed with the goal of developing management and minimization strategies for potential residuals. An interdisciplinary (chemistry, microbiology, materials science and engineering, environmental engineering) and multi-institutional (Clark Atlanta University, Rose Hulman Institute of Technology, Stanford University, University of Illinois at Urbana-Champaign) team of investigators has been put together to interweave system integration, materials synthesis and science components of the research. The team is working on the following scientific and technical objectives.

Scientific and Technical Objectives

1. To advance the fundamental understanding of the interactions of materials with water and its constituents, with special emphasis on the transport of and reactions with pathogens. The enhanced understanding resulting from fundamental research will allow the development of revolutionary new materials and systems for water purification.

2. To develop new disinfectants and catalysts with physical and chemical characteristics engineered to provide effective barriers against waterborne pathogens and disinfection by-products. These materials will be integrated into systems designed to provide robust treatment and produce safe water by removing not only pathogens but also chemical contaminants. The systems will also take into account that pathogens are capable of evolving in pathogenicity, virulence and resilience, and that the treatment of real waters requires taking into account potential interfering effects by inactive particulates, colloidal natural organic matter (e.g., fouling, scaling, degradation effects), and salinity.

3. The regeneration of materials, when required, will be designed with the goal of developing management and minimization strategies for potential residuals.

Stretch Goal: Beat the economics, efficacy, and reliability of conventional chemicals and media filters, and have the ability to adapt to the dynamics in emergence and evolving pathogenicity, virulence and resilience of target protozoan, bacteria and viruses, while achieving microbial removal at 4-6 orders of magnitude.

Research Posters

The table below shows the available research posters. To view a poster, simply click on its title below. This requires Adobe Acrobat Reader, which can be downloaded here for free. The Presenting Author column refers to the investigator who presented this poster at the 2005 NSF Site Visit.

ICT IIIA: Photon (UV-Vis) and Catalytic Control of Pathogens