This study assessed the field performance of commercially available core-shell S-nZVI particles to remediate an aquifer contaminated with Cr(VI) at a former chrome plating facility. S-nZVI migrated towards monitoring wells, resulting in a rapid decrease in Cr(VI) and total dissolved Cr concentrations and a long-term decrease in groundwater redox potential. Characterization of materials recovered from the injection and monitoring wells confirmed the presence of S-nZVI particles covered with insoluble chromium(III)-iron(III) (oxyhydr)oxides. Geochemical modelling confirmed the overall stability of the resulting Cr(III) phase at field conditions.
New publication in Journal of Hazardous Materials: Sulfidated nano-scale zerovalent iron is able to effectively reduce in situ hexavalent chromium in a contaminated aquifer
