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

摘要: This work has shown that the presence of carbon nanotubes (CNT) during ozonation promotes hydroxyl radical formation, resulting in a new advanced oxidation process (AOP) for removal of recalcitrant organic compounds in water systems. Building upon previous work demonstrating efficacy in batch systems, this study focused on the development of a CNT-enabled AOP in which CNT deposition on a membrane support in combination with an ozonated influent stream can couple chemical oxidation and filtration processes while preventing release of CNTs into the treated water supply. Tests have been conducted using a small volume bench-top system and an automated pilot-scale system that allowed the filters to be tested under continuous flow conditions more representative of field applications. This work demonstrated that a hybrid CNT filter is capable of achieving high levels of pollutant removal in a …