|Student Name:||Meidinger, Major|
|Thesis:||INFLUENCE OF MEDIA SIZE AND FLOW RATE ON THE TRANSPORT OF SILVER NANOPARTICLES IN SATURATED POROUS MEDIA: LABORATORY EXPERIMENTS AND MODELING|
|Location:||Bldg 646 room 117|
|Date & Time:||02/27/2013 at 2200|
|Abstract:|| Silver nanoparticulates (AgNP’s) have a wide range of uses from antibacterial to computer components and because of the range of uses they continue to be a highly produces material. Because of the likelihood of release from landfills, accidental release and residential use it is important to understand the important factors involved with the transport of AgNP’s in groundwater. By passing 15 mg/L AgNP solution with an average size of 17 nm through sand filled glass columns, this study looks at the effect of flow rate and media size on transport while keeping all other chemical variable constant. Three different sand sizes (0.4-2.0, 0.21-0.297, and < 0.074 mm) were used as well as two different flow rates (1 and 4 mL/min). It was found that flow rate had little to no effect on the transport of AgNP’s. It was also found that it is not necessarily the size of the media that is of importance but the heterogeneity of that media. The 0.4-2.0 mm sand had less breakthrough of then the larger more homogenous 0.21-0.297 sand.