Investigation on Transport of Iron oxide nanoparticles (Fe3O4) stabilized with poly acrylic acid In Two-dimensional porous media

Iron oxide nanoparticles were stabilized using poly acrylic acid (PAA) to yield stabilized slurry of Iron oxide nanoparticles. A two-dimensional physical model filled by glass beads was used to study the fate and transport of the iron oxide nanoparticles stabilized with PAA in porous media under saturated, steady-state flow conditions. Transport data for a nonreactive tracer, slurry of iron oxide nanoparticles stabilized with PAA were collected under similar flow conditions. The results show that low concentration slurry of iron oxide nanoparticles stabilized with PAA can be transported like a tracer without significant retardation. Using image processing method tracer/nanoparticles concentration inside the 2-D model filled with glass beads has measured. The groundwater flow model Visual MODFLOW was used to model the observed density-driven transport patterns. This is the first time the transport characteristics of nanoparticles based on the classical colloid filtration theory (CFT) is reported. Finally, we demonstrate that the numerical model MODFLOW can be used to predict the fate and transport characteristics of nanoparticles stabilized with PAA in groundwater aquifers.

Keywords:

Magnetic iron oxide nanoparticles (Fe3O4) , poly acrylic acid , porous media , transport , remediation