Exploration of methods for Cr(Ⅵ) pollution remediation in karst groundwater

This study investigated the migration and transformation of pollutants in the groundwater system, focusing on the hydrodynamic mechanisms involved，that is，the hydraulic gradient or concentration gradient. The appropriate are is then selected to artificially provide hydrodynamic conditions for groundwater pollutants, facilitating the systematic migration of pollutants, either for treatment or in-situ transformation. Based on the pollution patterns observed in key contaminated zones, six pollution control methods were developed. Five of these methods have been implemented and validated through on-site testing.