Heterogeneous surface charge

Biddiss, E., Erickson, D., Li, D., Heterogeneous surface charge enhanced micromixing for electrokinetic flows. Anal. Chem. 2004, 76, 3208-3213. 

For a system of two surfaces of constant but heterogeneous surface charge the method of solution is the same, however more complicated. The physical potential must be continuous at the interfaces as well as satisfy Gauss boundary conditions Eqs. (53). These are thus the same boundary conditions which were discussed in the linear model. 

Biddiss E, Erickson D, Li DQ (2004) Heterogeneous surface charge enhanced micromixing for electroki-netic flows. Anal Chem 76(11) 3208-3213... 

E. Biddiss, D. Erickson, D. Li, Heterogeneous Surface Charge Enhanced Micromixing for Electrokinetic Elows. Anal. Chem., 2004, 76,3208-3213. 

Heterogeneity of clay surface charge, which may result in... 

This is the equation, the isotherm, we were seeking. It is a generalized isotherm for the adsorption of ionic species on a heterogeneous surface. It considers the adsorption reaction as a substitution process, with the possibility of transfer of charge between the ion and the electrode and also lateral interactions among adsorbed species. 

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