Abstract
The objective of this chapter is to briefly introduce the basic concepts of organic pollutant sorption in soils and sediments and then to discuss diffusive mass transfer phenomena. Methods for the calculation of diffusion coefficients in vapor and aqueous phase are introduced and the definition of diffusion coefficients in porous media for steady state and transient conditions is given. Surface diffusion and diffusion in natural organic matter (polymers) are briefly reviewed at the end of Section 2.
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