[2F10-15] Nuclide Migration

[2F10] Transport and Deposition Behavior of PEG-Modified Gold Nanoparticles in Natural Barriers

*Carlos Ordonez¹, Shingo Tanaka², Naoko Watanabe², Tamotsu Kozaki² (1. Graduate School of Engineering Hokkaido University, 2. Faculty of Engineering Hokkaido University)

Keywords:radioactive waste disposal, natural barriers, gold nanoparticles, transport, aggregation

In this work, multifunctional gold nanoparticles have been applied as representative natural colloids to understand the impacts of colloid-mediated mobility of radionuclides in natural barriers. Three nanoparticles modified with the same polyethylene glycol (PEG) but of different gold-core sizes were studied. The differences in size have shown to impact the transport and deposition behavior of the gold nanoparticles as our experimental results show.