Catalytic Cavitation Membrane Agents for Ultrasound-Assisted PFAS Elimination and Wastewater Purification

Per- and polyfluoroalkyl substances (PFAS) pose a significant environmental and health risk due to their extreme persistence, bioaccumulation, and toxicity. Existing treatment methods, such as adsorption, incineration, and electrochemical degradation, suffer from high operational costs, secondary waste generation, and limited scalability. CAVICLEAN introduces an innovative catalytic cavitation-based approach, based on ERC funded project ConCASM, that leverages engineered catalytic cavitation membrane agents (CCMAs) to nucleate and stabilize cavitation bubbles, enhancing localized energy concentration and radical generation for efficient PFAS mineralization. The core innovation of CAVICLEAN lies in the development of specialized CCMAs that act as both cavitation nuclei, catalysts and membrane filters, promoting intensified acoustic cavitation while minimizing energy consumption. This process ensures complete mineralization of PFAS into harmless byproducts, addressing a critical gap in existing treatment technologies. Unlike traditional approaches that either capture or partially degrade PFAS, CAVICLEAN achieves direct molecular breakdown without secondary waste formation. The plug-and-play reactor design enables seamless integration into existing wastewater treatment infrastructure, offering a scalable, cost-effective, and energy-efficient solution.The project follows a structured methodology, beginning with fundamental investigations of cavitation dynamics and CCMA material properties, followed by laboratory-scale validation of PFAS degradation kinetics. A pilot-scale continuous-flow reactor will then be deployed in real wastewater treatment plants to assess long-term stability, energy efficiency, and regulatory compliance. Additionally, life cycle assessments (LCA) and techno-economic analyses will establish the environmental and economic viability of the technology.