Evaluation of MetaFix Reagent Performance by Two Test Methods on Soils Heavily Contaminated with Arsenic

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.

Products
Type of Site

Former Arsenic Manufacturing Plant

Location

China

Contaminant

Arsenic

The TCLP and water leaching studies demonstrated significant stabilization effect of the leachable arsenic. MetaFix reagent dosing as low as 2% achieved a 99% stabilization effect, even by the stringent TCLP testing protocol. Water leaching concentrations dropped from 41.6 mg/L to 0.19 mg/L with MetaFix applied at a 2% dosing rate. This meets the entry standard of Class One industrial sold waste landfill, thus, significantly reducing its disposal cost and environmental risk.