A MASTER EQUATION FOR REACTIVE SOLUTE TRANSPORT IN POROUS-MEDIA

The mean value of a density of a ''cloud of points'' described by a ge neralized Liouville equation associated with a convection dispersion e quation governing adsorbing solute transport yields a joint concentrat ion probability density. The general technique can be applied for eith er linear or nonlinear adsorption; here the application is restricted to linear adsorption in one-dimensional transport. The equation genera ted for the joint concentration probability density is in the general form of a Fokker-Planck equation, but with a suitable coordinate trans formation, it is possible to represent it as a diffusion equation with variable coefficients.