Modeling - Field Sampling: Principles and Practices in Environmental Analysis - page 191

FIGURE 7.9 Linear increase and linear decrease in a component in the
environment.
Components adsorbed on particle surfaces will decompose slowly because they are less
available when adsorbed. Components in small pores must diffuse out of the pore before
they can be decomposed. The rate of diffusion will depend on the concentration
difference between the bulk solution and the pore solution. When the concentration of
component in the bulk
FIGURE 7.10 Exponential increase and decrease of components in the
environment.
solution decreases to a point at which it is lower than that in the pore, then the component