Models for Describing the Diffusion of Oxygen and Other Mobile Constituents Across the Mud-Water Interface

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Abstract
Equations describing the diffusion of O2 across the mud-water interface were derived for several model systems. The major innovation in some of these models over those found in the literature consists of allowing reductant to diffuse through the mud toward the mud-water interface. In comparision with steady-state models where the reductant is treated as immobile, this innovation leads to considerable increases in estimated oxygen flux under some conditions. The various models are compared for specific values of pertinent parameters. The models may be applied to other mobile constituents in the mud-water system.