Understanding ion transport under various driving mechanisms in porous materials

What is it about?

Ion transport in saturated porous materials is a complex process important for many engineering applications. It is challenging to control because it is influenced by multiple factors. In this study, we use a combination of methods to understand and manage ion transport in porous materials. We developed a new system to classify transport behaviors using two indices, the Advection Diffusion Index (ADI) and the Electrodiffusivity Index (EDI). By adjusting electric potential, pressure, and ion concentration, we can control ion transport effectively. Our simulations in various models, including synthetic porous media and real sandstone images, confirmed our findings. The results show that these indices can serve as reliable indicators for managing ion transport, offering valuable insights for future research in subsurface engineering.

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Photo by Uriel SC on Unsplash

Photo by Uriel SC on Unsplash

Why is it important?

Understanding and controlling ion transport in saturated porous media is crucial for various engineering fields, such as groundwater remediation, oil recovery, and the design of advanced materials for energy storage. Efficient ion delivery and transport management can significantly enhance the effectiveness of these processes. For instance, in environmental engineering, precise control over ion transport can improve the removal of contaminants from groundwater. In the energy sector, it can lead to the development of more efficient batteries and fuel cells. Additionally, in geotechnical engineering, better ion transport control can enhance the stability and performance of soil and rock structures. Therefore, advancing our knowledge in this area not only addresses fundamental scientific questions but also has practical implications for improving technology and sustainability in multiple industries.