An initial treatability test followed by field application demonstrated that a low dose of MetaFix was successful in treating soils highly contaminated with chromium to below a stringent remedial goal of <1 mg/kg.
Soil was contaminated by the historic stockpiling of chromium slag at this former chromate manufacturing facility site in Yunnan Province China. The primary contaminants of concern were hexavalent chromium (Cr (VI)), along with other heavy metals including lead and cadmium. The project had a stringent remedial goal of <1 mg/kg for Cr (VI).
A lab treatability study was conducted to determine the optimal MetaFix reagent formulation and dosing rate to treat the highly contaminated soil samples with a total arsenic concentration of 21,700 mg/kg.
A lab treatability study was conducted to determine the optimal MetaFix reagent formulation and dosing rate to treat the four heavy metals of concern: As, Cd, Pb, and Zn.
A lab treatability study was conducted to determine the optimal MetaFix Reagents formulation and dosing rate to treat the highly contaminated soil samples.
EHC Metals Reagent is now a part of the MetaFix portfolio of customizable reagents. EHC Metals effectively treated TCE and immobilized Cr(VI) from groundwater to below detection limits at a manufacturing facility in Washington state.
The main contaminant of concern, aluminum, has decreased from a baseline concentration of 1,530 μg/L to 224 μg/L after ten months, which is well below the remedial goal of 750 μg/L. Significant reductions also have been observed in dissolved arsenic and copper downgradient from the PRB.
