We have shown that the presence of carbon nanotubes (CNT) during ozonation promotes hydroxyl radical formation, essentially resulting in a new advanced oxidation process (AOP) for removal of recalcitrant organic compounds. Building upon previous work demonstrating efficacy in batch systems, this study focuses on the development of a CNT-enabled AOP in which CNT deposition on a membrane support can be used in combination with an ozonated influent stream to couple chemical oxidation and filtration processes while preventing release of CNTs into the treated water supply. Tests have been conducted using a bench-top system for preliminary small volume experiments with ongoing development of an automated pilot-scale system allowing the filters to be tested under continuous flow conditions more representative of field applications. To date, we have observed ozone degradation with corresponding hydroxyl radical formation and pollutant transformation dependent on influent ozone concentration and CNT areal density.

Development and scale-up of a hybrid carbon nanotube filter as a reactive substrate in ozone-based advanced oxidation processes

248th National Meeting (2014)

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