A+ Environmental Solutions, LLC

A+ Environmental Solutions, LLC (AES), uses zero-valent iron (ZVI) in permeable reactive barriers (PRB) and to treat source zones by injecting and/or mixing with impacted soil. ZVI – elemental iron – is a strong reducing agent capable of abiotically dehalogenating chlorinated solvents (i.e., trichloroethene (TCE), perchloroethylene (PCE), dichloroethylene (DCE), trichloroacetic acid (TCA), vinyl chloride). Groundwater flows through a PRB of ZVI particles that can make the barrier more permeable than the surrounding aquifer.

AES also uses the emerging technology of nano-scale zero-valent iron (NZVI) for source zone and plume treatment. The finer NZVI particles are more reactive than granular ZVI, and have the potential to more quickly treat concentrations of cholorinated volatile organic compounds (CVOC).

With the Geoprobe GS2250 High Pressure Pumping System (shown at right), among other pumping systems, AES creates the ZVI PRB, and directly injects ZVI and NZVI into the source zone. CVOCs are destroyed in a chemical reaction, resulting in nontoxic end products. The iron can last for years in the subsurface, effectively destroying high concentrations of contaminant.