Polymer-modified nanoscale zerovalent iron (NZVI) particles are delivered into porous media for in situ remediation of nonaqueous phase liquid (NAPL) source zones. This work evaluated the importance of NZVI particle concentration, NAPL saturation, and injection strategy on the ability of polymer-modified NZVI (MRNIP2) to target the NAPL/water interface in situ in a 2D porous media model. Dodecane was used as a NAPL model compound for this first demonstration of source zone targeting in 2D. MRNIP2 at moderate and high particle concentrations (3 and 15 g/L) did accumulate preferentially at entrapped NAPL, i.e., it was capable of in situ targeting. The amount of MRNIP2 that targets a NAPL source depends on NAPL saturation (Sn), presumably because the saturation controls the available NAPL/water interfacial area and the flow field through the NAPL source.

Polymer-modified Fe<sup>0</sup> nanoparticles target entrapped NAPL in 2D porous media

243rd National Meeting (2012)

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Polymer-modified Fe0 nanoparticles target entrapped NAPL in 2D porous media

Polymer-modified Fe⁰ nanoparticles target entrapped NAPL in 2D porous media