Assessment of nZVI synthesis and mobility at a field trial

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The use of nanoscale zero valent iron (nZVI) for remediation of contaminated sites has received significant attention in part due to the ability of nZVI to rapidly transform contaminants in controlled laboratory experiments. One problem that has hampered the widespread implementation of nZVI is poor subsurface mobility. Due to strong attractive forces, nZVI tends to agglomerate to micron size particles, limiting mobility in porous media. To overcome this problem nZVI particles may be stabilized by coating them with polymers making them stable in solution for days. Column experiments conducted in our laboratories, with polymer stabilized nZVI, indicate that this nZVI should be quite mobile in subsurface environments. Pilot studies that have applied nZVI at the field scale have reported limited mobility due to lack of or poorly formulated polymer