Hindered sedimentation stage

In the hindered sedimentation stage, fb < t < tc, while layer B settles with a constant velocity. 

Three stages bubble escape, hindered sedimentation and solids consolidation... 

The First-Order Kinetic Model. Karickhoff (1, 68) has proposed a two-compartment equilibrium-kinetic model for describing the solute uptake or release by a sediment. This model is based on the assumption that two types of sorption sites exist labile sites, S, which are in equilibrium with bulk aqueous solution, and hindered sites, Sjj, which are controlled by a slow first-order rate process. Conceptually, sorption according to this model can be considered either as a two-stage process ... 

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