[3G04-08] Migration/Sorption

[3G04] Migration of elements in bentonite as filtering media

*Kazuya Idemitsu¹, Yaohiro Inagaki¹, Tatsumi Arima¹ (1. Kyushu university, Faculty of engineering)

Keywords:bentonite, migration, neptunyl carbonate, oxo-anions, filtration

Anions and large complexes migrate through the limited pores in bentonite. Oxo anions and carbonate complexes were found to be filterated. Especially in experiments of long diffusion periods, the concentration distribution becomes exponential and does not vary with time. This phenomenon was confirmed for neptunyl carbonate complexes and selenite etc..