Speaker
Description
Adsorption–desorption reactions at fluid–solid interfaces underpin a wide spectrum of natural and engineered processes taking place in porous media, including contaminant remediation, solute retention in soils, and sequestration of geogenic and anthropogenic heavy metals. However, accurately predicting these reactive processes remains an open challenge. Current continuum-scale models are typically parametrized using average reaction rate values derived from batch experiments. In contrast, the inherent heterogeneity in pore-scale fluid velocities produces nonuniform solute distributions, i.e., incomplete mixing, which drives the transport of reactants to reactive surfaces. To date, the impact of this velocity heterogeneity and incomplete solute mixing on adsorption-desorption reactions at fluid-solid interfaces remains largely unclear. Here, we present a novel quasi-two-dimensional optically transparent micromodel featuring impermeable solid grains with reactive surfaces. Direct visualization of the spatiotemporal evolution of reaction products using high-resolution fluorescence microscopy enables the quantification of pore-scale adsorption–desorption rates across a range of Péclet numbers. This micromodel-based platform provides a versatile experimental framework for the quantitative assessment of the intricate coupling between local fluid dynamics and interfacial reactions in porous media.
| Country | Switzerland |
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| Student Awards | I would like to submit this presentation into the Earth Energy Science (EES) and Capillarity Student Poster Awards. |
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