Abstract
Simulations have been made of the redox buffer depletion rate in landfills of combustion residue wastes. The model is basedupon a one-dimensional mass balance where oxygen transport results from a combination of advective and diffusive processes. A simple, generalised representation of redox buffering properties is used where dissolved oxygen reacts inaccordance with a first order rate law. Using certain simplifying assumptions, it is possible to obtain an analyticalsolution for the time required for complete depletion of the redox buffering capacity of landfilled solid wastes. The results indicate the overwhelming importance that the effectivediffusivity of oxygen in the landfill has upon the rate of redoxbuffer depletion. The results also show under which conditions transport effects may be expected to dominate the leaching processes and determine an upper limit for the depletion rate.
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Crawford, J., Neretnieks, I. Simulation of the Redox Buffer Depletion Rate in Landfills of Combustion Residue Waste Materials. Water, Air, & Soil Pollution 128, 223–242 (2001). https://doi.org/10.1023/A:1010388101789
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DOI: https://doi.org/10.1023/A:1010388101789