Speaker
Description
Enzyme-induced carbonate precipitation (EICP) is a promising biogeochemical process for enhancing soil stability, mitigating subsurface permeability, and remediating environmental contaminants. Despite its growing applications, the pore-scale dynamics of EICP - particularly the associated changes in pore structure and flow velocity - remain poorly understood. This knowledge gap hinders the optimization of EICP-based techniques for diverse subsurface engineering challenges. This study aims to investigate the effects of EICP on pore geometry and fluid flow behavior. High-resolution optical and fluorescence microscopy techniques were combined with time-lapse imaging to monitor real-time changes in pore-scale structures and flow fields during the precipitation process. Through controlled experiments, the study quantifies the evolution of pore throat constrictions, overall porosity, and flow velocity distributions induced by carbonate precipitation. The findings highlight how EICP alters the heterogeneity of natural porous media, leading to spatially variable changes in hydraulic conductivity and flow velocities. This research provides a framework for understanding and optimizing EICP processes at the pore scale, contributing to the broader application of biogeochemical techniques in subsurface engineering and environmental management.
| Country | China |
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