Exploring the Circular Economy Potential of the ASPIRE Method: A Numerical Study on Copper Ion Trapping

This study explores the Accelerated Supergene Processes in Repository Engineering (ASPIRE) concept for long-term trapping of copper ions from contaminated water using numerical simulations. The ASPIRE method offers a sustainable approach to water remediation and resource recovery through permeable reactive barriers. A numerical framework, based on unsaturated soil mechanics and reactive transport, is presented, considering water flow, copper ion transport, adsorption, and precipitation. A case study evaluates the ASPIRE concept's performance over a 5-year period, demonstrating the system's effectiveness in capturing approximately 45,000 kg of copper. Adsorption and precipitation mechanisms contribute to the enrichment process. The study highlights the importance of monitoring and maintenance to address potential challenges like clogging. The findings support the feasibility of the ASPIRE concept as a promising approach for simultaneous water remediation and resource recovery, aligning with circular economy principles.