349760 The Effect of Stabilizers on the Ability of Zero Valent Iron Nanoparticles to Degrade Trichloroethylene

Monday, November 4, 2013
Grand Ballroom B (Hilton)
Hannah Bulovsky, Oregon State University, Corvallis, OR

Zero valent iron nanoparticles, particles with at least one dimension under 100 nanometers, have been found to be effective for remediation of groundwater contaminants due to their large surface area to volume ratio and high mobility in contaminated target zones. These properties cause the particles to rapidly agglomerate, which can decrease their reactivity. To overcome the attractive forces between the particles, a stabilizing compound can be added to the particle solution during synthesis. This study examined the stabilizing capabilities of gum arabic and sodium carboxymethyl cellulose and the effect of stabilization on particle reactivity. The ability of the stabilized particles to degrade trichloroethylene, a hazardous groundwater contaminant, over 24 hours was assessed using gas chromatography. The concentration of trichloroethylene incubated with unstabilized zero valent iron nanoparticles did not decrease at all, while the concentration of the trichloroethylene incubated with gum arabic stabilized particles decreased by about 12 percent. The small size and dispersion of the stabilized particles provided more reactive sites per particle than the unstabilized particles, leading to increased reduction of trichloroethylene.

Extended Abstract: File Uploaded
See more of this Session: Undergraduate Student Poster Session: Environmental
See more of this Group/Topical: Student Poster Sessions