In-Situ Reductive Dehalogenation of DNAPLS By the Use of Emulsified Zero-Valent Nanoscale Iron Particles

This study will demonstrate the feasibility of using emulsified nanoscale iron particles to remediate pools of DNAPLs (Dense Non-Aqueous Phase Liquids) through the use of an in-situ dehalogenation process. The emulsified system will consist of a surfactant stabilized oil-in-water emulsion with the nanoscale iron particles contained within the emulsion particles. DNAPLs, such as TCE, diffuse through the oil membrane of the emulsion particle whereupon they reach the surface of an iron particle where dehalogenation takes place. The hydrocarbon reaction by-products of the dehalogenation reaction diffuse out of the emulsion particle and vent to the ground surface. The method of emulsion delivery can be applied to DNAPL pools under buildings without interruption of usage of the facilities. Direct treatment of the DNAPL pool will avoid long-term contamination of groundwater as the DNAPL slowly dissolves. Unlike pump and treat, which has failed to remediate DNAPL pools, this methodology possesses the potential to totally eliminate pools of DNAPL. Because no successful in-situ methodologies currently exist for DNAPL remediation, the successful demonstration of the proposed methodology would lead to widespread commercial usage. ~990094 ~