화학공학소재연구정보센터
Transport in Porous Media, Vol.60, No.2, 217-223, 2005
Use of synchrotron tomographic techniques in the assessment of diffusion parameters for solute transport in groundwater flow
This technical note describes the use of time-resolved synchrotron radiation tomographic energy dispersive diffraction imaging ( TEDDI) and tomographic X-ray fluorescence (TXRF) for examining ion diffusion in porous media. The technique is capable of tracking the diffusion of several ion species simultaneously. This is illustrated by results which compare the movement of Cs+, Ba2+ and La3+ ions from solution into a typical sample of English chalk. The results exhibited somewhat anomalous (non-Fickian) behaviour and revealed heterogeneities (in 1D) on the scale of a few millimetres.