Estimation of diffusivity of mercury in addictived activated carbon

In this work the diffusivity of mercury in a commercial additived activated carbon was experimentally determined using an Argelian condensate. The diffusivity was estimated using the homogeneous solid diffusion model (HSDM) for short and long times (effective diffusivity). To the employed solid/liquid ratios, the values the diffusivity at short times were smaller than the corresponding values at long times and were in range obtained to diffusivity of organic solutes in activated carbon. The effective diffusivity was found to better represent the process than the diffusivity determined at short times, indicating that diffusivity depends on solute concentration in solid.