General diagenetic equation

The general diagenetic equation from which many important models have been derived (as given by Berner, 1980) is ... 

After making these adjustments for diffusion in sediments, the mass balance and vertical concentration patterns of nonconservative solutes in saturated sediments can be described by the following one-dimensional advective-diffusive general diagenetic equation (GDE) (Berner, 1980 Aller, 2001 Jprgensen and Boudreau, 2001) ... 

The mass balance and vertical concentration patterns of nonconservative solutes in saturated sediments can be described by the one-dimensional advective-diffusive general diagenetic equation (GDE). 

Simplifying the general diagenetic equation (Berner, 1980) for the mixing of a tracer at equilibrium within the solid and aqueous phase in a one-dimensional sediment profile of nonuniform density results in... 

If the solute imdergoes any chemical changes, a reaction term must be added to Eq. 12.4. In the absence of specific rate law information, diagenetic reactions are generally assumed to be first-order with respect to the solute concentration. Thus, the one-dimensional advection-diffusion equation far a nonconservative solute is given by... 

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